News Release 

How does nature renew itself?

A research group led by TU Darmstadt is looking for answers

Technische Universitat Darmstadt

Science Business Announcement

Throughout the history of our planet, ecosystems have been destroyed and then reclaimed by nature. However, the situation has now worsened. Rainforests are disappearing at an alarming speed and with massive clearcutting. The rate at which living beings are dying out has tripled in the past hundred years. "In the light of these developments, we must ask ourselves whether we are prepared for the complex regeneration of our planet," says Nico Blüthgen, Professor of Ecological Networks at TU Darmstadt and head of the consortium. "Because only complex ecosystems are ultimately resilient. Biodiversity alone is not enough. The diverse and close-knit relationships within an ecosystem are just as important. And we don't know how or at what speed nature makes these relationships. "

Blüthgen and 24 other scientists from 12 universities and foundations are therefore to spend the next four to eight years investigating the natural regeneration of the Chocó lowland rainforest in Ecuador. Which species will be the first to come back? How long will the natural regeneration take? Will the old biodiversity be regained? Will all the complex interactions be re-established? How close will the new rainforest come to the functionality of the old one? Blüthgen and the teams are not concerned with merely producing an inventory, but want to measure the complexity in the depths of the resurgent ecosystem.

To this end, the consortium will collaborate with the non-profit foundation Fundación Jocotoco and two universities in Ecuador. The managing director of the foundation, evolutionary biologist Martin Schaefer, designed the project together with Blüthgen, and the two are also managing it. Fundación Jocotoco has been buying land in the region for 20 years. Many areas were used as pasture, others for cocoa farming. Some areas have been regenerating for decades without external intervention, while others are only just beginning.

The researchers will look at important processes: the relationships between predators and prey, between trees and pollinators, between mammals, seeds and dung beetles, and between ants, termites and deadwood - to name but a few. These processes play a crucial role in the natural regeneration of the forest. Part of the funding will also go towards training Ecuadorian students and the establishment of local structures which can then be used permanently.

Blüthgen and the teams will also use targeted disturbance experiments to test how the newly-created networks stabilise the ecosystem. "We won't be looking only at the complexity itself, but at the interplay between the networks and the recovery process after a small-scale disruption. It is a look at resilience on two scales: the regeneration of entire forest areas, and the repair within the forest." The scientists are urging for speed: "Ultimately, our own survival depends on the survival of the global ecosystems. We need more information if we want to strengthen the natural regeneration process in a targeted manner."

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Contact:

Prof. Dr. Nico Blüthgen
Ecological Networks Lab
Department of Biology
Technical University of Darmstadt
bluethgen@bio.tu-darmstadt.de
Tel. +49 6151 16 - 75411

About TU Darmstadt

The Technical University (TU) of Darmstadt is one of Germany's leading technical universities. TU Darmstadt incorporates diverse science cultures to create its characteristic profile. The focus is set on engineering and natural sciences, which cooperate closely with outstanding humanities and social sciences. Three research fields shape the profile of TU Darmstadt: I+I (Information and Intelligence), E+E (Energy and Environment) and M+M (Matter and Materials). We dynamically develop our portfolio of research and teaching, innovation and transfer, in order to continue opening up important opportunities for the future of society. Our 312 professors, about 4,500 scientific and administrative employees and about 25,400 students devote their talents and best efforts to this goal. In the Unite! network, which unites universities from seven European countries, the TU Darmstadt is promoting the idea of the European university. Together with Goethe University Frankfurt and Johannes Gutenberg University Mainz, TU Darmstadt has formed the strategic Rhine-Main Universities alliance. http://www.tu-darmstadt.de

MI-No. 21e/2021, Hildegard Kaulen

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