A journey through the history of ecology

In the first half, participants were guided through the various research areas by tandem lectures given by the institute’s professors. Former senior professors and long-standing professors appeared alongside the current senior professors in their respective fields. Prof. Dr. Brigitte Urban, Head of the Landscape Change Working Group, and Prof. Dr. Vicky Temperton kicked off the journey through time with a look at what the history of ecology can tell us about the present and the future.

Brigitte Urban presented several research projects on ecological history. In view of the increasing human impact on our environment, it is particularly important to reconstruct former ecosystems in order to understand the current state and enable effective landscape management. While the past teaches us that settlement and human land use can cause long-term problems such as soil erosion in many places, there are also positive examples of natural resilience. The marshlands provide good news in this regard: research on the historical development of upland marshland vegetation reveals that they have a high degree of adaptability to purely climatic changes, even in modern times. However, pressure on upland marshlands is increasing due to human use and climate change, putting this flexibility to the test. If we go even further back in time, to the last interglacial period approximately 125,000 to 115,000 years ago, we encounter very large herbivores, known as megaherbivores. They may have played an important role in shaping the vegetation. What would our landscape look like today if megaherbivores still existed? Brigitte Urban is investigating.

Taking the history of ecology into your own hands

What happens to ecosystems when species are lost? And how does this affect ecosystem functions and services? Vicky Temperton addresses these and other questions in her research. Preserving and restoring biodiversity is not just about species diversity, but also about which plants play a role and what functions and interactions they have. Due to increasing biodiversity loss, it is becoming increasingly important to understand the development of plant communities in order to restore biodiversity. ‘Priority effects’ show that the developmental history of a community, through species that arrived first, influences not only species composition but also ecosystem functions. Vicky Temperton showed the audience that ecologists are not just spectators on a journey through time through the development of plant communities but can and perhaps even should change the history of plants themselves in order to promote biodiversity or certain functions. For instance, positive interactions between certain species groups could be used and the order in which plants arrive in a particular ecosystem could be changed.

Artificial intelligence to the rescue

Looking ahead to future research, each of the tandem presentations included an introduction to new research methods and projects in the respective fields. A glimpse into the future of ecology shows that machine learning with the help of AI can indeed lead to the desired breakthrough in biodiversity experiments. AI is therefore useful both as a measuring tool and for the interdisciplinary integration of ecological knowledge.

A plea for cooperation between science and practice  

At the end of the first tandem presentation, the big question arose as to how all this accumulated ecological knowledge can be integrated into society. Have you ever heard of real-world laboratories? In this format, stakeholders from science and practice work together to develop solutions to problems. The focus is on mutual learning in an experimental environment. For Vicky Temperton, real-world laboratories are important in socio-ecological research on the renaturation of degraded ecosystems. ‘When real-world laboratories are scaled up, they offer great potential for transformation,’ says the professor of ecosystem functions and services. And this transformation, with a balance between ecological and social perspectives, is absolutely necessary for the successful renaturation of ecosystems.

‘Insects are incredibly important for everything we do.’

The journey through time continued with Prof. Dr. Michael Staab, who is Head of the Department of Animal Ecology and Trophic Interactions. Representing Prof. Dr. Thorsten Assmann, Professor of Ecology with a focus on animal ecology, who was unable to attend, he provided insights into the great diversity and importance of insects and their ecosystem functions. The past also plays an important role in animal ecology, as Thorsten Assmann’s research on the significance of ice ages for today’s ecological composition shows. The beetle expert is also the only one who has documented the decline of ground beetles through biodiversity monitoring in the Lüneburg Heathland. The rapidly increasing extinction of species is a constant companion in animal ecology research and the basis for many research projects.

Among other things, Michael Staab is investigating how interactions between species give rise to relevant ecosystem functions. How do biodiversity and interactions change when the environment changes? Studies of trees in south-east China show that more species also mean more interactions. A decline in species can therefore have a significant impact on interactions between the remaining species – and not in a positive way. Another focus of Staab’s research is the influence of land use intensity on insect diversity. His research shows that where land use is particularly intensive, the landscape becomes homogeneous and the microclimate in ecosystems also loses its diversity. In a new project, drone imagery will be used to investigate how microclimatic conditions change as a result of different forms of land use, causing insects to lose their habitats. One consequence of insect loss: if insect diversity declines, the ecological balance is disrupted. To prevent this, less intensive use is required – for example, through extensive grazing and staggered mowing.

‘Species extinction is the loss of our Earth’s natural historical memory.’

‘Can we afford this?’ asked Prof. Dr. Werner Härdtle, Professor of Landscape Ecology and Nature Conservation. He completed the lecture tour together with Prof. Dr. Sylvia Haider, Head of the Vegetation Ecology and Biodiversity Research Working Group. The clear message from both of them was that species loss is not an option – plant diversity ensures ecosystem functions. Using impressive images, Werner Härdtle compared the burning of tropical rainforests with the fire at the Anna Amalia Library in Weimar 20 years ago, in which thousands of globally unique books were destroyed. This comparison illustrated the enormous loss of species caused by the destruction of the rainforests. Härdtle reported on decades of research in the subtropics of China, where 400,000 trees were planted to experimentally investigate the influence of species diversity. With shining eyes and infectious enthusiasm, the professor presented the results: A rich diversity of tree species can increase the productivity of forests by up to 100%. These effects also help when trees are under stress, for example due to climate change. Species that are sensitive to drought are better supported by biodiversity. However, such biodiversity effects take time, and we should give nature that time.

Sylvia Haider focused on the present and future of biodiversity research. She emphasised the role of functional biodiversity, i.e. the diversity of different functional characteristics. This type of biodiversity research also takes into account changing environmental conditions due to climate change, human-induced disturbances and the introduction of invasive species, and their influence on functional characteristics. Haider and her colleagues are part of a globally unique working group that measures the functional characteristics of trees between species, within species and also within individuals. The result: high functional diversity is associated with a high diversity of ecosystem functions. Surprisingly, a substantial proportion of the variability comes from the individuality of the trees.

New habitats at altitude

Finally, let us turn our attention to another level, namely mountains and the research into plant diversity along altitude gradients. How are ecosystems in vulnerable mountain regions changing, and what influence do non-native, introduced species have on this? During the question-and-answer session, the topic of species migration to higher altitudes as a result of climate change was raised. On the one hand, this creates new habitats, which can lead to the protection of species, according to Haider. On the other hand, existing interactions are also disrupted and species that were previously specialised in the mountains are being displaced by migrating species. Research is now needed to determine how this shift will affect biodiversity at altitude in the future.

‘Quo vadis ecology?’ – A panel discussion with a view to practical applications and the future

With the setting sun on the guests’ faces and questions about the future of ecological research in their minds, the panel discussion continued after a short break for refreshments. The panel consisted of Prof. Dr. Andreas Fichtner, Professor of Vegetation Ecology and Biodiversity Research, Dr. Heike Brenken, landscape planner at the Lüneburg Heath Nature Reserve Association, Prof. Dr. Vicky Temperton and Prof. Dr. Michael Staab. The first half of the discussion focused on the big question of how to put scientific findings into practice and successfully transform society towards sustainability.

‘We simply cannot continue like this; there are not three Earths!’

– emphasised Vicky Temperton. How can the results of real-world laboratories be widely implemented and practical partners be involved in the process? According to Temperton, it is not only the results that are important for scaling up such projects, but also the process itself. Cooperation between different actors builds trust, without which transformation is not possible. Heike Brenken speaks from her practical experience when she says that basic scientific research is important, but that help is also needed to implement the results on the ground. This is where administration and politics come into play. An article in the local newspaper or a presentation at a farm festival can also be important in increasing citizens’ understanding of nature conservation. In response to the appeal to the administration, a voice from the audience representing the Lower Nature Conservation Authority in Lüneburg spoke up. The participant assured the audience that the administration was also making efforts, but that they often encounter many restrictions. The “adjusting screw” therefore also lies with the people who can change the regulations for nature and species conservation. The students who are being trained at the university as ‘change agents’ could be a glimmer of hope, as they will later form the interface between practice and science with a broad thematic overview.

In the final stages of the journey through time, moderator Agnes Friedel concluded by drawing attention to the pressing ecological issues of the next 15 years against the backdrop of global change. Andreas Fichtner spoke of three important pillars for the future: ecosystem stability, adaptation to global change and a more respectful approach to our environment. However, the core message of research is often not understood in its implementation. Our values play a special role here. What do we find important? What motivates us? The understanding and awareness of the effects of global change on ecosystems, which ecologists experience in their research, must spread throughout society.

But what are the specific steps that can be taken to protect biodiversity?

– asked one participant, and perhaps some readers of this article as well. There is much that can and should be done to preserve biodiversity. Here are a few suggestions from the panel and the audience:

• Spreading awareness in society and politics that we cannot live without nature
• Changing land use, for example by consuming less meat
• Reward ecological services in the economy
• Making sectors such as agriculture and forestry more environmentally oriented and less production-oriented
• Generating motivation for environmental protection at an early age in school

Politicians bear much of the responsibility for this, but grassroots movements within society also have a role to play. The panel and the audience agreed: people must be passionate about protecting biodiversity!

Our journey through different eras and areas of research has shown that communication plays a central role in the protection of biodiversity and ecosystems – because only if we continue to exchange ideas and work together can we achieve this goal. With these closing words, Agnes Friedel bid farewell to the symposium participants as they headed into the evening. And with this thought, this article also bids farewell to its readers as they continue on their journey into a future that could not be more significant for the development of ecology.

Photos: ©Jennifer Fandrich / Leuphana

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How successful is the restoration of species-rich grassland in Germany? Many of the researchers in the Grassworks project have been working on this question for many years and the Grassworks project was finally launched four years ago, funded by the Federal Ministry of Education and Research (BMBF) via the Research Initiative on the Biodiversity Loss (FEdA).

A successful conclusion and a hopeful day for the restoration of species-rich grassland

The time had finally come at the Grassworks final event, we presented our findings on success factors in the restoration of species-rich meadows and pastures from the perspectives of ecology, economy and social ecology. In the glass hall of the Representation of the State of Lower Saxony in Berlin, we welcomed around 50 participants with the smell of hay, much illustrative material of regional wild plant mixtures and an exciting lecture program. Almost 200 other people also took part in the event online.

Researchers from Grassworks and our invited guests presented and discussed the fascination of grassland, the current state of its restoration and what we can do for species-rich grassland. The well-known journalist Dr. Tanja Busse, who has a great deal of experience in bringing together the topics of agriculture and biodiversity, set the overall framework with her usual sharp mind and charm. The event was opened by Dr. Tanja Busse and Prof. Vicky Temperton, with words on the urgency of bringing biodiversity and agriculture together. Only if we find a way to work together can we find a path to a sustainable future.

Prof. Vicky Temperton, co-project leader with Prof. Anita Kirmer, presented the objectives of the event and the framework of the Grassworks project, followed by an overview of the objectives and projects of the Research Initiative on Biodiversity Loss (FEdA) by Dr. Julian Taffner, head of the central coordination.

Findings from the Grassworks project: diverse perspectives on multifunctional grassland restoration – grassland can do something!

Prof. Anita Kirmer presented the ecological results of a post-hoc analysis of restoration measures on 121 areas throughout Germany. The aim is to record the ecological success of already restored areas in three different regions along a gradient from north to south in Germany. The comparison with species-rich and degraded reference grasslands impressively demonstrated that the restoration projects assessed were generally very successful. Direct harvesting methods (e.g. hay transfer and direct seed collection) and the sowing of regional wild plant mixtures being the best methods for achieving higher biodiversity. Once the plant species are re-established, the bees and butterflies follow.

Prof. Volker Beckmann added an economic assessment of the profitability of extensive grassland management. Based on the economic data of the managers, his team determined that the average subsidy cannot yet compensate for the additional costs of extensive management.

Konrad Gray then reported on the transdisciplinary work in the real-world laboratories, where the live restoration of species-rich grassland was jointly carried out in direct cooperation between scientists and local stakeholders. In this way, active engagement between stakeholders and with their environment can strengthen diverse and pluralistic values and relationships with each other and with nature. Through strengthened social and socio-ecological ties, not only ecological restoration, but hopefully also long-term sustainable use concepts can be created through close collaboration.

Dr. Michaela Meyer from the German Association for Landscape Conservation (Deutscher Verband für Landschaftspflege, DVL) then presented findings and experiences from a practitioner perspective. She highlighted the recently published practical guide “Creating species-rich meadows and pastures successfully” (that is available free of charge here: https://www.dvl.org/publikationen/dvl-schriftenreihe). It contains information on the legal background, funding opportunities and advice on how to overcome obstacles and challenges.

At the end of the Grassworks session, Prof. Vicky Temperton presented a synthetic view of the results from the whole project, combing ecological, social science and socio-ecological perspectives.

Although the ecological results look very good at first glance, but a nuanced second look shows how important it is to pay attention to the variability in the results and the importance of adequate management practices. The so-called “shifting baseline” syndrome, whereby humans become accustomed to reduced species diversity and are therefore not very concerned about species loss, could play a role here. The species-rich reference grasslands were species-rich, but not as species-rich as fifty or hundred years ago, for example. Thus, the successes on the restored areas may look better than they would with reference from the 1950s. From a social perspective, it is apparent that restoration projects that are managed in a participatory and less top-down manner are more successful (at least in the perception of the participants). Collaboration and co-creation in restoration projects led to an increase in relational values (related to our connections with an object or place) that are important for the strength of connection with the grassland habitat and the motivation to continue. Interestingly, the species-rich grassland is the problem child in the area of biodiversity loss in Europe and, at the same time, the driving force for a transformation towards more diversity.

Biodiversity in meadows and pastures – evidence of our cultural landscape – the result of human-nature relationships

The Grassworks hypothesis

The Grassworks hypothesis seems to have been confirmed: Our findings show that successful grassland restoration is related both to ecological complexity and to beneficial political and social framework conditions.

Our ecologists and the practical know-how of the DVL both recommend the introduction of many native wild plant species, especially wildflowers, and good preparation of the area, i.e. adequate soil disturbance, in order to provide suitable starting conditions for grassland plants species, wild plants that are not competitive under the commonly nutrient rich, fertilized conditions of our farmed landscapes. At the same time, the DVL concluded from collaborative, scientific and practical work that cooperation between farmers and nature conservationists is of great importance. Restoration and conservation of species-rich grassland is much easier and more successful if both groups of stakeholders do not act as antagonists. Rather, if they collaborate as partners in advising and supporting a project and support each other, success is around the corner.

The participants in the concluding panel discussion, Dr. Jürgen Metzner from the DVL, Prof. Sabine Tischew from the Anhalt University of Applied Sciences, Dr. Julian Taffner from the FEdA program and Steffen Pingen from the Farmers Association at Federal Level, also confirmed that cooperation between stakeholders from nature conservation and agriculture works far better than opposition. Both sides agreed that it would be a good idea for the farmers’ association and the land care association to go to Brussels together. Despite differences, there was a consensus that more efforts were needed to protect and promote grassland ecosystems, but also that the existing concepts, particularly those for rewarding and involving farmers, were not sufficient. Tanja Busse expertly navigated the discussion across the different perspectives brought to the table with a sharp intellect and much charm, and intervened whenever any inconsistencies became apparent.

The research in the real-world laboratories also revealed great unanimity among the participants. The participants also discovered that they shared a diverse appreciation of grassland and exchanged views on the importance of meadows and pastures for them in their home region. Through these consolidated and multi-layered relationships with and around grassland, approaches were developed in the project regions that have sustainably improved the condition and social reputation of species-rich grassland, which will hopefully continue for a long time to come.

A greater understanding and appreciation for each other, between agriculture, nature conservation and society, can thus initiate a transformative change in which grassland as a socio-ecological system produces socially supported biodiversity. A more direct integration into local systems can contribute to (non-)monetary remuneration and thus address the recognized gap between value generation and value creation. This is because the support measures that contribute significantly to profitability are not only often inadequate from a business management perspective, but also too complicated or inflexible for managers and nature conservation goals.

The second part with guest lectures on the multifunctionality of grassland

As an introduction, Prof. Josef Settele, known as a pollinator expert in IPBES (Intergovernmental Panel on Biodiversity and Ecosystem Services), gave an overall overview of species loss, and the particularly important role of open land and grassland in the loss of plant and animal species, especially in agricultural landscapes. He succinctly emphasized the link between this diversity on open land and the provision of ecosystem services. The potential of nature to contribute to people’s quality of life is continuously decreasing, and the restoration of species-rich ecosystems can significantly counteract this development.

Prof. Eckhard Jedicke from Hochschule Geisenheim University followed with a clear plea for a multifunctionality approach as part of a transformation towards more diversity. Only if the true value of species-rich grassland, its contribution to the common good in a rapidly changing world, are more clearly perceived and appreciated by our society, can we manage a real transformation to more biodiversity.

Finally, Simon Keelan from the Federal Agency for Nature Conservation (Bundesamt für Naturschutz, BfN) presented the first key considerations for implementing the EU Restoration Law in relation to grasslands. He made it clear that this legal milestone represents both a great opportunity and a challenge. Here, the core results of projects such as Grassworks will be able to play an important role in improving the planning and implementation on the ground.

This is how it can work …

Dr. Simone Schneider from SICONA Nature Conservation Syndicate in Luxembourg presented the impressive national action plan for the conservation and restoration of species-rich grassland in Luxembourg, characterized by the clear prioritization of necessary measures. In the Luxembourgish approach, each nature conservation authority and organization are provided with the necessary human and financial capacities to achieve ambitious goals and, in particular, to enable personal advice and collaboration with local farmers. In addition, a forum has been established at a high political level in which future positions and strategies in the dialog between agriculture and nature conservation are developed for the national level. A positive outlook for grassland!

Conclusion & outlook

All in all, it was clear from the results of the Grassworks project, the guest lectures, audience discussions and the panel discussion: species-rich grassland has huge potential! And this requires nature conservation, agriculture, society and politics to pull together. It is also important to raise awareness of the diverse values and relationships relating to species-rich grassland and to make them tangible. That is why not only Grassworks, but also many other academic, political and social initiatives are working to improve compensation and recognition for managing and recreating species-rich grassland. The Grassworks consortium is now preparing a policy brief (Kernforderungen) based on key findings from the project. The presentations, discussions and talks at the Grassworks closing event showed ways and means of how research and practice can work together successfully to protect and restore species-rich grassland and how current approaches can be developed further. Because grassland has much potential. Let’s use this potential!