Aktueller Status eingereichter Sessions

1 Nature and people ▶
Full title: Nature and people - Pathways between biodiversity and human health

Chairs: Rachel Oh Rui Ying, Aletta Bonn, Melissa R. Marselle

Contact: r.oh@uq.edu.au

Society is exposed to significant challenges relating to human health and wellbeing. As global populations choose and continue to reside in cities, they are subjected to intense urbanisation and loss of physical contact with nature. A recent rise in chronic and non-communicable diseases such as obesity and poor mental health has also been documented in urban residents. Conversely, climate change presents a huge threat to our biodiversity, optimal ecosystem functioning and its delivery of ecosystem benefits. With the increased frequency and prolonged duration of extreme climate events, our natural ecosystems may no longer be able to function optimally and sustainably. Given the importance of biodiversity?s contribution to human health and wellbeing, one questions whether and how experiencing nature under these urbanisation and climatic challenges provides relevant health and wellbeing benefits. As such, this session hopes to understand the contribution of biodiversity to human health and wellbeing, under the dual pressures of extreme urbanisation and climate change. It hopes to also gain insights into the casual pathways through which health and wellbeing benefits are delivered, and to apply the knowledge towards managing potential synergies between different academic disciplines to improve public health and the conservation of biodiversity.
2 Lessons from 50 years of ecology ▶
Full title: Transitions in ecology: what lessons have we learned in the last five decades?

Chairs: Nadja K. Simons, Sven Rubanschi

Contact: nadja.simons@tu-darmstadt.de

Since the very first Gf? conference, almost a whole scientific lifetime has passed and some of those who attended the first Gf? conferences as students or young researchers are now established scientists and have witnessed or even shaped how the field of ecology has changed over time. In this session, we want to take a look back at the questions ecologists asked, the experiments they conducted and the theories they tested in the last centuries. In particular, we want to learn how those ideas or approaches influenced today?s ecological questions, both for the scientists who asked them and for the field of ecology as a whole. Importantly, we are not only looking for the success stories and influential ideas but also for the dead-ends and the lessons learned from those. For this, we invite contributions which fall broadly into one of two types: (1) presentations of their first (or early) research projects by established scientists with an emphasis on how this project shaped their career or scientific interest. (2) projects that revisit ecological questions or studies which have been conducted several decades ago. For both types of contributions, we don?t place restrictions on the study system or subfield of ecology. Instead, we ask presenters to place their results in the context of how ecological knowledge or theory has evolved since the time of the original study. In order to account for the fact that communicating ecological science in English has become the standard in Germany only relatively recently, contributions in either German or English are accepted and the session is structured accordingly.
3 Dynamic ecosystems ▶
Full title: Dynamic ecosystems in a changing world

Chairs: Sabine Fink, Kristin Ludewig

Contact: sabine.fink@wsl.ch

The fate of dynamic ecosystems such as e.g. fire-prone habitat, storm water ponds, floodplains and coastal ecosystems remains unclear, since they are endangered due to human influences and changing climate. Many global and national guidelines designate dynamic ecosystems as conservation priorities, but specific management methods are required to ensure conservation of habitats as well as rare and adapted species in dynamic zones. Common strategies for conservation management are frequently not applicable to dynamic ecosystems due to the stochastic nature of dynamic events. The lack of reference systems for natural processes in dynamic zones further creates scientific challenges. This session aims at contributing management strategies for dynamic ecosystems based on scientific studies. While we focus on the transition of results from scientific studies to practical conservation work, we are also interested in contributions investigating functioning of dynamic ecosystems per se.
4 Decline of Insect Abundance ▶
Full title: Special Session: GfÖ Research Funding on Decline of Insect Abundance

Chairs: Thomas Frank

Contact: thomas.frank@boku.ac.at

To point to the ongoing and tremendous decline of insects, the Ecological Society of Germany, Austria and Switzerland (GfÖ) announced a call for research proposals on “Decline of Insect Abundance” in 2019. Five of the submitted applications were granted. The granted proposals cover the following topics: 1. Trends of ground beetle numbers over 33 years in the Kaiserstuhl 2. The importance of dead wood amount for preserving insect diversity in naturally disturbed forests 3. Ecosystem effects of reduced insect abundance 4. Tits as monitors of insect abundance and diversity 5. Insect enhancement in lowland streams In this special session the granted proposals will be appropriately dignified. The session will consist of five talks given by the awardees on the aforementioned topics. It gives the audience the opportunity to inform themselves about five current projects dealing with insect decline.
5 Managing the farms for the landscape ▶
Full title: Do farmers manage the landscape for biodiversity-yield synergies?

Chairs: Maria Kernecker, María Felipe-Lucia

Contact: maria.kernecker@zalf.de

Recent evidence demonstrates that landscape complexity benefits biodiversity (i.e. multi-trophic diversity), and that this in turn profits agricultural yield. However, agricultural landscapes are not typically managed exclusively for complexity, since this would require collaboration between multiple farms and other land use systems. Despite the abundance of ecological studies showing the importance of coherent landscape-scale management for biodiversity, most policies and instruments (e.g. agri-environmental schemes) only target single fields and farms. In order to understand what could be expected from individual farm management targeting the agricultural landscape, we need to answer a number of questions, such as: How can landscape management be organized into individual but interacting [agro]ecosystems?. Could this type of management work collectively (bottom-up), or would it have to be implemented through normative or regulatory means?. What would the agro-ecological benefits be of this type of management, and would there be other positive effects, e.g. at the societal level? Within this context, we would like to invite presentations that (1) focus on individual farm management of landscape structure (i.e. composition, configuration, and connectivity). More specifically, i) how farms adapt their practices to the landscape, and in which cases this is possible. and ii) how farms interact with each other ? or other land use systems ? in management decisions (e.g. in collaborative management). To understand the agricultural and ecological implications of both individual and collaborative management, we also welcome (2) more classic ecological studies that focus on biodiversity-yield spill-over effects between fields or land use systems within agricultural landscapes (i.e. effects of farm management or landscape structure on biodiversity and yield). Our goal with this session is to identify concrete linkages between farms? individual or collaborative management and biodiversity-yield relationships across agricultural landscapes. We also aim to identify cases in which individual or collaborative management is needed for biodiversity-yield synergies either in-field or across defined landscapes. At a broader level, our session aims to contribute to a less conflicted discourse between agricultural production and biodiversity conservation.
6 Living labs in agricultural settings ▶
Full title: Living labs in agricultural settings: enabling transformations in agriculture towards sustainable land use and food systems

Chairs: Fabian N?rnberger, Maria Busse, Anett Richter

Contact: fabian.nuernberger@thuenen.de

The GFÖ in 2020 is framed under the motto “Science in Transition, Science for Transition”. Science in agricultural settings is challenged by the increasing pressure to find solutions that are ecologically sensible, socially acceptable and economically profitable. Living laboratories represent a promising approach to bring science into practise and to pathway transformations. The concept of living labs is a user-driven and integrative approach, which aims at co-designing innovative solutions and collectively experimenting innovations in real life settings. It builds on collaborations between different disciplines and practitioners as it is claimed in transdisciplinary research and citizen science. Furthermore, living labs aim at creating ‘research-implementation spaces’, establishing active networks and partnerships, and enabling social learning and co-production of knowledge. While transdisciplinary research projects caught attention, and the number of living labs is increasing, there are, until today, only few experiences in establishing and managing them. Challenges are differences between stakeholders’ and researchers’ timelines, objectives, and capacities to collaborate. Hence, the purpose of this session is to a) bring scientists from different fields with expertise in running or conceptualizing living laboratories or related transdisciplinary research projects on sustainable land use or food systems together and to b) develop in the future guidelines on how to best establish a network of living labs in agricultural settings and beyond. In our session, researchers that have already established living labs will share their best practise examples (case studies). As a group we will identify and discuss differences and similarities of presented transdisciplinary approaches. Further, we will develop a list of challenges and will co-develop practical solutions on how to address of establishing and managing transdisciplinary research projects to transform intricate systems together with stakeholders.
7 Multiple ecosystem services in grasslands ▶
Full title: Multiple functions and services of grassland ecosystems advancing conservation strategies for modern societal demands

Chairs: Gert Rosenthal, Nils Stanik, Eckhard Jedicke

Contact: rosenthal@asl.uni-kassel.de

The focus of the session is on semi-natural grasslands of high nature value (HNV) and the multiple ecosystem functions and ecosystem services they fulfil and provide. This provision developed strongly out of a long history of diverse (without-fertiliser) management systems which generated the high biodiversity of these ecosystems. Even if many of these HNV grassland types are subject of national and/or EU-wide protection schemes they experience a continuous qualitative and quantitative decline throughout Europe. Major causes for this negative trend are that the economic interest and motivation of maintaining these ecosystems decreased substantially in favour of high-productive grasslands. In the past small-scale agricultural context, production of biomass was the primarily requested ecosystem service by all grassland types, whereas today, especially from HNV grasslands other ecosystem services like their carbon storage or aesthetic function appear to gain an increased societal recognition. rnThe background hypothesis of this session is that the consideration of multiple ecosystem functions and services will support and enhance the conservation efforts of HNV grasslands as an important ecological, economic and aesthetic resource against mono-functional highly productive grasslands of low biodiversity. The session?s approach is to combine aspects from science and practice for advancing conservation strategies. We therefore, call for contributions that consider on both grassland?s multiple ecosystem functions and services, and their societal significance. The aim is to summarise scientific evidences of the multiple dimensions of ecosystem functions and services of HNV grasslands and develop this information for modern societal demands. Furthermore, we want to discuss these results in the light of current and future conservation goals. Here the main questionss are, if there is scientific evidence for the societal benefits of multifunctional grasslands and how can this advance and support more targeted conservation schemes and activities for HNV grasslands. This would be an important step to generate benefits and to transfer knowledge into management practice and current political discussions. rn
8 Wildflower strip efficiency ▶
Full title: Sown wildflower areas as an integral part of multifunctional agricultural landscapes

Chairs: Tim Diekötter, Frank Jauker

Contact: tdiekoetter@ecology.uni-kiel.de

Sown wildflower areas have become a popular agri-environmental scheme to conserve biodiversity and promote associated ecosystem services in agricultural landscapes. Competition for space in intensively managed agricultural regions, however, is intense and financial resources for subsidies are limited. To facilitate implementation of wildflower areas, knowledge on optimal design and installation practices is required. This includes insights into how flowering areas benefit agro-biodiversity at local (e.g. moderated by size or floral composition) and landscape scales (e.g. moderated by connectivity with additional flowering areas or semi-natural landscape elements in their surroundings). A great potential of flowering areas lies in their optimization towards multiple target organisms and the promotion of multiple ecosystem services such as pollination, biological control and water purification. Here, we are interested in studies that advance our understanding of the efficient functioning of sown wildflower areas towards a dynamic, locally and regionally adapted tool integral to creating the multifunctional agroecosystems of the future.
9 Agroecology and climate change ▶
Full title: Agroecology as a strategy to climate change adaption

Chairs: Sibylle Stöckli, tba

Contact: sibylle.stoeckli@fibl.org

Assessing species vulnerability to climate changernImpact of climate change on agroecology and ecosystem functionsrnClimate chnage adaptation priorities for biodiversity and food securityrnagri-environmental measures to conserve biodiversity under climate changernInteractions between climate change and habitat loss effects on biodiversity
10 Agrobiodiversity and ecosystem services ▶
Full title: Biodiversity and ecosystem services in agricultural systems

Chairs: Catrin Westphal, Annika Hass

Contact: cwestph@gwdg.de

Land use change and agricultural intensification are considered as major drivers of biodiversity loss and can impair ecosystem functions and services in agricultural landscapes. At the same time, agricultural production relies on vital agroecosystems and species providing important ecosystem services, such as decomposition, biological pest control and pollination. Hence, we need innovative production systems that sustain agrobiodiversity and promote ecosystem services (ecological intensification). In this session, we will focus on different approaches and measures that target the diversification of cropping systems and conservation of functionally relevant species and the ecosystem services they provide. This session will provide insights in the ecological but also socio-ecological outcomes of a wide range of local to landscape scale measures. For instance, benefits (and costs) of intercropping, mixed-cropping and reductions in agrochemical inputs as well as farm level (e.g. organic agriculture) and/or landscape level (e.g. hedgerows, flower-strips) measures.
11 Anthropogenic drivers of change ▶
Full title: Anthropogenic drivers of long-term biodiversity change

Chairs: Diana Bowler, David Eichenberg

Contact: diana.bowler@idiv.de

Long-term population and community studies have revealed the different ways in which biological communities have changed over time. Species’ responses are usually a mix of winners and losers, causing turnover in community composition. Understanding the causes of these changes is a central question for ecologists. However, attribution of biodiversity change is challenged by the availability of driver data and uncertainty about the most relevant parameters. While land-use and climate change are considered among the dominant drivers in Europe, their relative importances and pathways of impacts are still unclear. In this session, we will share different examples and approaches to biodiversity change attribution. We are especially interested in long-term studies comparing responses across species, such as among functional groups or more generally testing trait x environmental interactions. We particularly welcome studies considered interactive effects of different drivers, in either experimental and observation settings. We hope the session leads to a general discussion on the most fruitful methods of attribution, which may help towards building predictive models of biodiversity change.
12 Phenotypic plasticity and global change ▶
Full title: Phenotypic plasticity and global change - methods, mechanisms, patterns and applications

Chairs: Tobias Sandner

Contact: tobias.sandner@biologie.uni-marburg.de

Phenotypic plasticity plays a crucial role in the response of animal and in particular plant species to changing environmental conditions. However, plasticity can also slow down the speed of selection and may thus hamper adaptation to novel conditions. Phenotypic plasticity is relevant under global change, because reduced plasticity in small and fragmented populations may increase their risk of extinction, but plasticity can also contribute to the success of invasive species. Plasticity research covers different scales, from differences among genotypes to differences among populations and species, and may cover several generations if parents prepare their offspring for certain environmental conditions (transgenerational plasticity). Questions addressed range from the genetic basis of plasticity to the quantification of the costs and adaptive value of plasticity and the application of this knowledge to species conservation or species distribution modelling. This session aims to unite the different aspects of plasticity research, from methodological and mechanistic issues to applied questions, to enhance our understanding of species responses to global change.
13 Drylands in Transition ▶
Full title: Drylands in Transition

Chairs: PD Dr. Anja Linstädter, Liana Kindermann, PD Dr. Niels Blaum

Contact: anja.linstaedter@uni-bonn.de

In global drylands which comprise arid, semi-arid and dry subhumid ecosystems, plant growth is mainly limited by low and highly variable precipitation, mostly constraining human activities to livestock production. Thus, livelihood security in drylands relies heavily on forage provision and on other ecosystems services from vegetation. Drylands are also among the most sensitive areas to global environmental change. Increasing land-use pressure and climate change massively threaten ecosystem health and productivity, with negative consequences for local livelihoods and well-being. Although there is ample evidence that climate and land-use may have interactive effects on ecosystems, we still lack a mechanistic understanding how these two global change drivers ? both separately and jointly ? affect biodiversity, and, subsequently, ecosystem functions and services. This session calls for studies targeted at a better understanding of transitions in dryland ecosystems triggered by global environmental change. We invite observational studies, experimental studies and modelling approaches dealing with the effects of climate change and/or land-use change on dryland ecosystems. We particularly welcome studies on rapid transitions in drylands due to tipping point phenomena, as well as studies on changing management regimes such as transitions between livestock-based and wildlife-based strategies.
14 Scales in ecology ▶
Full title: Scales and heterogeneity in ecology

Chairs: Katrin M. Meyer, Kerstin Wiegand, Britta Tietjen

Contact: kmeyer5@uni-goettingen.de

Scale-dependence is ubiquitous in ecology. It adds a new dimension of complexity to ecological research which calls for more scale-explicitness. However, scale-explicit studies and specifically general scaling methods are still scarce. This applies to empirical and modelling studies alike. In the case of homogeneous study sites, linear methods can often be used for scaling-up. However, our world is inherently heterogeneous, which makes connecting multiple scales highly challenging. The problems start with matching the study findings to the research question and do not end with transferring ecological patterns across spatial scales of a heterogeneous environment. The goal of this session is to contribute towards resolving this scale discrepancy in ecology.
15 Remote Sensing of Ecosystems ▶
Full title: Remote Sensing of Ecosystem Functions, Processes and Services

Chairs: Stefan Erasmi, André Große-Stoltenberg

Contact: stefan.erasmi@thuenen.de

Remote sensing data have proven their benefit in a wide range of applications in ecological and ecosystem research. Applications encompass various ecosystems from urban, marine, and freshwater to agriculture, forest and other vegetated land. Most applications built on the concept of key indicators (e.g. spatial, spectral and temporal metrics) that can be assessed from remote sensing analysis to describe the condition of and pressures on ecosystem functions, processes and services. Based on this concept, remote sensing is a valuable tool to indirectly monitor various aspects of ecosystem properties and their changes at different spatial and temporal scales. The session aims at highlighting the overall concept of remote sensing based ecosystem indicators and to give an insight into recent trends and developments of algorithms, sensors and applications in this field. We welcome contributions from methodological to applied research with the following (non-exclusive) topics: - Monitoring of indicators for condition and pressures of ecosystems - Predicting ecosystem services from remote sensing data - Advanced machine learning techniques for remote sensing data analysis - Developments in remote sensing sensors and platforms for mapping ecosystem properties
16 Automated biodiversity monitoring in ecology ▶
Full title: Sensing Biodiversity

Chairs: Lars Opgenoorth

Contact: opgenoorth@uni-marburg.de

With this session we want to give a platform for presenting latest break-throughs in the automation of biodiversity monitoring by means of sensors, IoT networks, the buildup of dedicated data bases, to the automated analyses by machine learning. This can range from stationary sensors such as insect cameras, integrated tree sensor boxes, via mobile sensors mounted to animals, rovers, UAV?s, to integrated biodiversity monitoring systems that cover entire interaction networks or ecosystems. We would like to hear both from recent developments and successful case studies as well as from initiatives targeting future collaborative networks.
17 Biodiversity monitoring ▶
Full title: Improving biodiversity monitoring in terrestrial ecosystems

Chairs: Christoph Scherber, Hannah Reininghaus, Michael Meyer

Contact: Christoph.Scherber@uni-muenster.de

The aim of this session is to showcase and discuss current approaches to biodiversity monitoring in different countries and generate ideas for improvement. Ideally, a question- and hypothesis- driven approach to monitoring of biodiversity, ecosystem processes and environmental drivers is developed, combined with experimental manipulation of selected drivers.
18 Methods and Models ▶
Full title: Computational Methods and Models in Ecology

Chairs: Florian Hartig, Lionel Hertzog, Gudrun Wallentin

Contact: florian.hartig@ur.de

In this session we welcome contributions advancing all aspects of ecological modelling from statistical approaches (i.e. new R packages, method comparisons) to process-based models (i.e. IBMs, population models). The aim of the session is to portray the large diversity of models and methods used in ecology, but also to foster exchanges between modellers and applied ecologists. Given the theme of the conference, we would also particularly welcome contributions reflecting on the evolution in ecological modelling practices over the last 50 years and on the new questions and research avenues that opened up due to advances in modelling techniques. This session will be organized in cooperation with the AK computational ecology.
19 Species (re) introductions ▶
Full title: Species (re)introductions in conservation and restoration

Chairs: Anna Bucharova, Anne Kampel

Contact: anna.lampei-bucharova@uni-muenster.de

Species reintroductions are an indispensable tool of species conservation and ecosystem restoration. They can be motivated by the ethical responsibility to prevent species extinction, the need to support rare ecosystem functions or, in the case of ecosystem restoration, the practical necessity to re-establish ecosystems that provide basic ecosystem services. In any case, the goal of all reintroductions is to establish self-sustaining populations of the target species. With ongoing environmental change species (re)introductions face new challenges. This session aims on summarizing latest scientific advances in species (re)introduction research, ranging from introductions of rare and endangered species over assisted migration to large-scale reintroductions within ecosystem restoration. We welcome contributions on any type of organism, using various methods including experiments, observations, genomics, modelling or meta-analyses, as long as they are based on data and present advances beyond local importance.
20 Nature conservation on military sites ▶
Full title: Nature conservation on military sites

Chairs: Tillmann Buttschardt, Harald Grote

Contact: tillmann.buttschardt@uni-muenster.de

Military areas are subject to various restrictions in their use on the one hand, but on the other hand they are also subject to specific pressures which have led to the development of special and significant habitats not only in the past. Due to access restrictions, they are also well controlled and can fulfil specific nature conservation objectives. Special management regimes, including fire, are also able to simulate long gone land use practices. In addition, the wolf is currently returning to Germany and there is an option to develop these areas as core habitats for the growing wolf population.rnIn this session, the current state of nature conservation research on military areas and the properties resulting from the conversion will be compiled in cooperation with the Federal Ministry of Defence. In addition, the role of military sites for effective nature conservation will be discussed.
21 Assessment implementation gap ▶
Full title: Post2020: Closing the implementation gap ? how to make assessments of biodiversity and ecosystem services relevant for decision-making

Chairs: Stefan Hotes, Aletta Bonn

Contact: s.hotes.25t@g.chuo-u.ac.jp

Currently, the post-2020 targets of the Convention on Biological Diversity are being discussed and will soon be agreed upon. Key to halting biodiversity loss and securing important ecosystem services for people is to close the implementation gap, building on robust science. This session provides a forum for discussing how information on biodiversity and ecosystem services can become relevant for decision-making in order to support sustainable development. This includes the production process and the utilization of assessments such as those prepared by the Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES). Contributions that focus on integrating and consolidating ecological knowledge related to specific topics for particular target audiences are also welcome. Solving challenges arising from the transition to renewable energy sources by assessing its impact on species and ecosystems is a case in point. All contributions should highlight how assessment output has been summarized for applications in policy development and governance schemes. We particularly invite papers which address the uptake of assessment results and their effects on decision-making.
22 Natural history and taxonomy of insects ▶
Full title: Natural history and taxonomy of insects for the conservation of biodiversity

Chairs: Alexandra Klein, Lars Krogmann

Contact: alexandra.klein@nature.uni-freiburg.de

The observed decline of insect diversity in Central Europe and other parts of the world has led to major concerns about a parallel decrease in taxonomic expertise. As entomologists used to observe insects in great detail in order to collect and describe them, natural history observations of insect species are decreasing in parallel with the loss of taxonomists. Although natural history data are important for a better understanding of how to conserve insects, they play today a minor role in ecological studies. In this proposed symposium, we invite biologists and ecologists that are still involved in describing new insect species to present their morphological and molecular methods to describe new insect species and to introduce methods to resolve their phylogenetic relationships. We also invite researchers to introduce new life history observations across all insect taxa or to introduce concepts to inspire the fascination of natural history and taxonomy of insects with the goal to better conserve and restore insect biodiversity.
23 Carbon allocation in plants and ecosystems ▶
Full title: Carbon allocation and storage in plants and ecosystems: new insights from experiments and field observations

Chairs: Henrik Hartmann, Günter Hoch, Michael Bahn

Contact: hhart@bgc-jena.mpg.de

Climate change potentially alters carbon (C) relations of plants and ecosystems. On the one hand, the ongoing increase of atmospheric CO2 changes plant and ecosystem stoichiometry with consequences for their functioning. On the other hand, increasing temperatures and drought might decrease net-C-uptake on the plant and ecosystem level, which, in extremis, can lead to declines in plant/ecosystem functioning and increasing mortality. Against this background, C allocation and reserve formation in plants and ecosystems have gained increasing attention over the last decade in plant ecology. However, although transport and allocation of photoassimilates to C sinks (e.g., respiration, structural growth, defense compounds, symbiotic interactions), the formation of C reserves and the re-allocation of stored C are essential processes in plants, our current understanding of the controlling mechanisms and the ecological significance of these processes, at the whole-plant level and beyond, is still surprisingly patchy. Moreover, the effect of environmental change, like drought or increasing temperatures, on the whole-plant C-balance and on C-allocation patterns, as well as the significance of C-reserves for stress resistance and resilience of plants are currently not well understood and a matter of ongoing debates. As a consequence of this lack of knowledge, we can neither properly predict the carbon balance of terrestrial ecosystems nor do we understand the factors that may drive plant mortality or survival under increasing environmental change. Within this session, we aim to bring together researchers working on different aspects of C allocation and storage in an ecophysiological context. In particular, we encourage contributions on quantitative analyses of phloem C-transport in plants, C-allocation at the whole-plant and ecosystem level and studies on the ecological significance of C-reserves for stress tolerance.
24 Variability of traits ▶
Full title: Inter- and intraspecific trait variability in plants

Chairs: Solveig Franziska Bucher, Sergey Rosbakh, Niek Scheepens

Contact: solveig.franziska.bucher@uni-jena.de

Environmental factors such as temperature, precipitation and land use impose strong pressures on plant communities. Plants respond to changes in environmental conditions either via phenotypic plasticity or genetic adaptation or migration to follow conditions to which they are already adapted to, the last aspect leading to changes in plant community composition. All these plant responses affect trait variability, whether this be at inter- or intraspecific levels. Moreover, trait variability may vary at different spatial scales and this in turn may influence functional properties at the level of local plant communities up to whole ecosystems. In contrast to interspecific trait variability, intraspecific trait variability has been a neglected factor in community ecology for a long time and only recently there has been an interest in this source of variability to improve understanding of ecosystem functions and community processes. This resulted in the insight that considering both inter- and intraspecific trait variability simultaneously increase our understanding of ecological processes and community assembly, as both types of data can help explain niche differentiation and/or the coexistence of species. Given ongoing global change, it is important more than ever to study these distinct levels of variation to forecast plant species and community responses under further changes. This session offers a stage for scientists working on inter- or intraspecific trait variability in plants, its response to environmental changes, and its effects on higher-level processes. The presented research can address these topics through basic or applied questions in plant population ecology, community ecology and related disciplines.
25 Impacts of recent climate extremes on ecosystem fu ▶
Full title: Impacts of recent climate extremes on plant functioning in terrestrial ecosystems

Chairs: Nadine Ruehr, Henrik Hartmann, Miguel Mahecha, J?rgen Kreyling

Contact: nadine.ruehr@kit.edu

The climate of the 21st century shows a consistent trend of increasing temperatures and changing precipitation patterns. Since the turn of the century most years were warmer than what would be expected from the long-term average. In particular, the years 2018 and 2019 were marked by extreme, record-breaking summer temperatures in central Europe and 2018 was also one of the driest years of the past 140 years. In some parts of Germany, Austria and Switzerland agricultural yield was substantially reduced and many forest tree species showed symptoms of decline or died in response to heat and drought, either directly or due to reduced resistance against pests and diseases. Forest and agricultural damage have been reported so far in terms of loss of timber volume or harvest grain mass, but these assessments do not account for the ecological impact of increased mortality or reduced productivity in grasslands, marshes and forest ecosystems. This session seeks to provide a platform for studies on impacts of extreme climate events on all aspects of ecosystem services in terrestrial ecosystems including forests, grasslands, mires and heathlands. Examples include assessments of spatial patterns or extent of decline or mortality, loss of productivity as well as impacts on greenhouse gas fluxes, or changes in species composition and the underlying processes. We welcome studies using a variety of different approaches including remote sensing, inventory assessments or field investigations. In addition, the session welcomes contributions from vegetation modeling allowing forecasting of ecosystem condition under anticipated future climate scenarios.
26 Water in plants ▶
Full title: Water in plants under climate change - from cells to ecosystems

Chairs: Bernhard Schuldt, Nadine Ruehr, Marco. M. Lehmann, Thorsten Grams

Contact: bernhard.schuldt@uni-wuerzburg.de

Water is a key factor determining the structure and function of plants and ecosystems. Questions regarding plant and ecosystem water relations, the impact of water availability on plant growth and ecosystem biogeochemistry as well as impacts of future climatic changes such as increases in frequency and intensity of severe drought and heat events on ecosystem functions remain largely unanswered. This session brings together researchers investigating plant water relations across scales from organs to whole plant, stand and ecosystem level. We invite contributions covering plant hydraulics and processes related to or affected by water uptake via roots and leaves, transport, transpiration as well as their control mechanisms, from both observational studies and experimental manipulations. Modeling studies scaling these processes and novel developments to trace water dynamics in the soil-plant-atmosphere continuum are also welcome. This session aims at elucidating structural, functional and physiological responses of plants to their environments spanning from eco-physiological to flux based approaches from different fields. We plan to assemble a group of scientists who are willing to step out of their disciplinary comfort zone and to discuss emergent topics from organ to ecosystem levels in the scope of climate change.
27 Scales and patterns of soil microbial diversity ▶
Full title: Scales and patterns of soil microbial diversity

Chairs: Christoph Tebbe, Michael Bonkowski

Contact: christoph.tebbe@thuenen.de

Since the advent of high-throughput DNA sequencing technology it has become feasible to capture the almost total diversity of microorganisms (bacteria, archaea, fungi and protists) in a soil sample. While DNA sequencing data are now accumulating, our capacity to predict the alpha diversity in soils and microbial community responses to treatments (beta-diversity) or environmental changes is still very limited. A major reason for this limitation is seen in the diversity of spatial scales which is applied to monitor microbial alpha- and beta-diversity. The objective of this session is therefore to present studies on soil microbial diversity which consider scales from soil aggregates to landscapes or even bio-geographical regions, and thereby stimulate the discussion about spatial scale selections and the best methods to analyze soil microbial communities appropriately.
28 Soil biodiversity, soil functions and ESS ▶
Full title: The diversity of soil biota - processes, functions and ecosystem services in land use systems

Chairs: Martin Potthoff, Stefan Schrader

Contact: mpottho@gwdg.de

Soil biota provides services that are beneficial to the productivity and sustainability of land use systems. This session aims to discuss how land use systems and its management practices affect soil biodiversity and how soil biodiversity feeds back to soil functions and ecosystem services. Soil biodiversity is immense but still we hardly understand what allows and what limits such a diversity in a somehow uniform habitat. Knowledge is mounting that a sustainable intensification of land use needs to include the conservation of processes and functions run by soil biota that are essential for self-preservation and self-regulation of soils. Hence, the contributions to this session should address (1) the strong progress in developing methods for biodiversity identification in soil and the quantification of biota specific impacts and (2) transversal interactions with socio-economical sciences that lead to the development of tools to assess soil management as a socio-ecological issue.rnThis session will focus on the role of soil biology in delivering soil functions in systems formed by humans, e.g. agricultural (including grassland), forest or restored sites. The synergies and trade-offs that occur within the bundle of soil functions and management practices need to be identified to develop effective strategies for both sustainable land use and the protection of soil (biota) as an ecosystem.rn
29 Biodiversity in urban blue space ▶
Full title: Biodiversity in urban blue space: where to go next?

Chairs: Frank Johansson, Frank Suhling, Diana Goertzen

Contact: frank.johansson@ebc.uu.se

Global urbanization has a negative effect on biodiversity. Negative effects of urbanization can however be alleviated by the presence of urban green space. One type of urban green space are ponds, lakes and streams, which can be named urban blue space. Such areas may provide important habitats as well as important habitat network for many species including species that are declining at a global scale. The importance of urban blue space for biodiversity has been shown in past studies. For example, urban blue space has been shown to have biodiversity index similar to the rural areas.\r\n\r\nWhile our knowledge on how to optimize biodiversity in the urban blue space is growing, room for improvements are needed. The goal of this session is to focus on several aspects that will provide increased knowledge on how to optimize biodiversity in urban blue space. We will provide knowledge on the latest statistical development and knowledge on how to analyze spatial patterns, connectivity and corridors in a meta-community perspective. The focus will be on how these methods can be applied to urban blue space, and we are also addressing the question if we need certain such tools for urban blue space. We will blend this theoretical knowledge with empirical studies that have used these methods in urban blue space. The topic of genetic diversity versus species diversity has been ignored in many past studies on biodiversity patterns in conservation biology and basically we have no such knowledge in urban blues space. We will address this topic as well. Besides increasing biodiversity, urban blue space is also important for the people in urban area. For example, several studies have shown that green and blue space increase well-being of humans, can be used for education in urban areas, and provide numerous other ecosystem service. However, sometimes these factors might interact with biodiversity goals, and hence it is important to have knowledge on how to optimize ponds with regard to biodiversity and ecosystem service simultaneously. We will therefore also invite researchers from engineering, social science and ecologist to highlight this issue.\r\n
30 zeitgemäße (?) pnV ▶
Full title: Die zeitgemäße Rolle des pnV-Konzeptes

Chairs: Franz Kroiher, Dr. Joachim Rock

Contact: franz.kroiher@thuenen.de

Das Konzept der „(heutigen) potenziellen natürlichen Vegetation“ (pnV) beschreibt aktuelle Standortspotenziale mit vegetationsökologisch begründeten Bildern. Diese Bilder, sowie die damit verbundenen Prozesse und ihre Ausprägungen werden als Referenzen (z.B. der Bestimmung der Naturnähe), Leitbilder und sogar (Entwicklungs-)Ziele genutzt. Die pnV ist vor dem Hintergrund der transienten Natur von Standortseigenschaften sowohl in ihrer Entstehung als auch in der Deutung und Verwendung problematisch. Ziele des Symposiums sind: - die ökologische Fundierung der pnV zu beleuchten (Prozesse und Zustände), - die Anforderungen an das Konzept, die sich aus aktuellen Prozessen (u.a. Klimawandel) ergeben, zu beschreiben und - einen Ausblick zu geben, welche Bedeutung es in Zukunft im Korridor zwischen Zielvorgabe und Orientierungshilfe haben kann, darf oder sollte.
31 Forest ecosystems and related sciences ▶
Full title: The future of forest ecosystems and the development of related sciences

Chairs: Franka Huth, Michael Bredemeier

Contact: f.huth@freenet.de

Over the last decades forest ecosystems worldwide have been strongly disturbed and damaged by various factors such as drought, fire, storm, insects and direct human impacts. Research provides important information needed to protect forest ecosystems and their diversity, and to preserve their essential ecosystem services for future generations. A wide variety of scientific fields have arisen in connection with the impacts on forest ecosystems. Forest ecology researchers focus on very specific areas, for example, forest pathology, tree physiology or genetics, while systems analysts and ecosystem modellers describe the complexity of processes within forest ecosystems and perform simulations important for future management of forests. The aim of the session is to address a broad spectrum of scientific disciplines that fall under the heading ?forest ecology?. Of particular interest are presentations detailing scientific work focusing on: (i) innovative methods to record and analyse the state of forest ecosystems, (ii) the identification of reasons for disturbances within forest ecosystems, (iii) their effects for ecosystem functions and processes, and (iv) the development of strategies and management concepts to preserve the vitality and functions of forests.
32 ecology of open forests ▶
Full title: Conservation and ecology of open forests

Chairs: Thomas Gottschalk

Contact: Gottschalk@hs-rottenburg.de

Open forests are known to be characterized by high biodiversity. Those forests can result from tree removal by large herbivores of the megafauna (>45 kg) and other natural disturbances like severe fires, hurricanes, ice, drought and endemic pests. For several centuries within the former millennium, anthropogenic open forests were common in Central Europe, which were characterized by canopy openness dependent on human disturbances. Due to the loss of these forests as well as the loss of the megafauna and the implementation of a ?subnatural forest praxis? a huge number of species has been disappeared from forests and currently several species are facing a rapid decline throughout Central Europe. The goal of this session is to show recent advances in research on landscape dynamics due to the former megafauna, the ecology of open forests and their specialized species community and to show best practise examples how the decline of open forest species can be stopped. Of particular interest are presentations demonstrating examples on species-orientated management options to bolster biodiversity within forest ecosystems.
33 Towards multi-functional forests ▶
Full title: Reconciling the many functions of forests - reserve, resource, and recreation

Chairs: Juliane Röder, Stefan Hotes

Contact: juliane.roeder@biologie.uni-marburg.de

We kindly ask for a nextension until Monday, 02.03.2020 to submit our proposal.
34 Macroecology - from traits to ecosystems ▶
Full title: Dimensions of diversity - macroecological avenues from traits to ecosystems

Chairs: Christian Hof, Holger Kreft

While the GfÖ celebrates its 50th anniversary in 2020, the GfÖ specialist group for macroecology is still in its teenage years - founded in 2007. However, its growth and development over the last 14 years mirrors the vibrant dynamics of the field, from species richness patterns via macroevolutionary and biogeographical processes towards trait-based and ecosystem-focused approaches.
Following this years’ theme of the GfÖ annual meeting, “Ecology – Science in Transition, Science for Transition”, our session aims to bring together contributions that represent the multitude of diversity dimensions and macroecological avenues that make up the field’s current state of the art. Thereby, we invite submissions from all sub-fields of macroecology. While either empirical, conceptual, or methodological studies are welcome, integrative presentations will be given priority, i.e. talks or posters that integrate different diversity dimensions, methods, taxa, data types, as well as spatial and temporal scales.
35 Towards multi-purpose forests ▶
Full title: Optimising ecosystem services of forests – as reserve, resource, and for recreation

Chairs: Juliane Röder, Stefan Hotes

Contact: juliane.roeder@biologie.uni-marburg.de

Forests provide multiple ecosystem services from all service categories: provisioning, regulating, cultural and supporting, with wood playing a central role in several of them. Some ecosystem services show positive correlations and can be maximized simultaneously, while trade-offs occur between others. Forestry and the production of wood have shaped the appearance, composition and functions of forests for a long time, and some scenarios suggest that reliance on the provisioning ecosystem services of forests may increase in the future. However, maximizing wood production has had severe negative effects on the abundance and diversity e.g. of deadwood and deadwood specialists in the past, and biodiversity strategies require the reversal of these trends. Increasing demand for regulating ecosystem services makes the debate on suitable management strategies for forests more complicated: forests play a role in essential hydrological and biochemical processes which contribute to regulating ecosystem services, but maximizing these can also create conflicts with conservation goals. Adding the aspect of cultural ecosystem services leads to an even more complex situation: forests are important for recreation and tourism, and considerable cultural and economic value has been associated with these types of forest ecosystem services. However, because the economic benefits derived from these ecosystem services do not normally reach forest managers, they are not necessarily considered in decisions on how to use forests.
The aim of this symposium is to address the challenges involved in the search for optimal solutions to reconcile demand for different ecosystem services of forests. We invite in particular contributions with a focus on the role of wood in relation to different ecosystem services and to biodiversity. Examples include e.g. (i) the evaluation of ecological, economic and/or cultural values of forests and deadwood from local to national scales, (ii) methods to monitor progress on the implementation of National Biodiversity Strategies and Action Plans (NBSAPs), (iii) examples for compensation mechanisms addressing the trade-off between ecological and economic optimization.
36 Urban ecology ▶
Full title: Urban ecology’s past, present and future: Researching solutions for tomorrow’s challenges

Chairs: Monika Egerer, Leonie Fischer, Divya Gopal, Sascha Buchholz, Sonja Knapp, Michael Strohbach

Contact: monika.egerer@tu-berlin.de

This year, the Ecological Society of Germany, Austria and Switzerland turns 50. As we celebrate this anniversary with the motto “Science in Transition, Science for Transition,” we are compelled to review the development of urban ecology. The development of urban ecology as a “Science for Transition” since the early 1970s is illuminated in the first editorial of the Journal Urban Ecology. Here, Editor Royce LaNier wrote in 1975: “Clearly there is a need to develop settlement patterns more responsive to the biospheric systems which support mankind and to the global needs of the species.” Indeed, cities today are faced with huge environmental and social challenges. These include the loss of biodiversity, extreme weather events, human-wildlife conflict, and the decrease of human-nature experiences. All of these factors are driving the loss of urban ecosystem services, upon which the liveability of the world’s cities, and the well-being of its residents, depend. While urban ecology has in recent decades vastly improved our ecological understanding of urban environments, challenges remain. Consequently, in this session, we aim to bring together research from diverse topical areas in urban ecology that are contributing to our understanding of the ecology of urban ecosystems and landscapes, and how to manage them for future challenges. The goals of this session include: 1) highlighting the key research projects and key people in urban ecology’s development; 2) discussing the contribution of urban ecology to ecology as a field; 3) reflecting upon the impact of urban ecology to solve real-world problems; and 4) envisioning solutions towards managing biodiverse and functioning urban environments in the next 50 years.
Beyond the session, we will suggest a special issue in an urban ecology-focused journal, for which we welcome the session’s presenters’ contribution.