REASSEMBLY

Reassembly of species interaction networks

Resistance, resilience and functional recovery of a rainforest ecosystem

​DFG-funded Research Unit REASSEMBLY (FOR 5207) Posts @bsky
1st funding phase 2021-2025, 2nd phase 2026-2029

REASSEMBLY aims at understanding network dynamics to uncover rules of network dis- and reassembly in a highly diverse tropical lowland rainforest ecosystem. We study the dynamics of natural forest recovery from agriculture along a chronosequence and the contribution of re-assembled networks to the resilience of ecosystem processes against perturbation. We compare the trajectories of predator–prey, plant–pollinator, and plant–seed disperser networks, as well as decomposition networks between mammals, dung beetles and seeds, and between dead wood, ants, termites, and beetles. Subprojects thus examine networks of all major ecosystem processes mediated by interspecific interactions: predation, pollination, primary and secondary seed dispersal, herbivory, decomposition, and tree seedling recruitment. Networks and ecosystem processes are studied along a large-scale chronosequence of forest recovery (62 plots representing different stages of succession) and in a small-scale perturbation–recruitment experiment. Our Research Unit is funded by the Deutsche Forschungsgemeinschaft (DFG).

Our MISSION: Although REASSEMBLY is a basic scientific research unit, our aim is to ensure that the knowledge gained can be applied and contribute to optimizing the restoration of tropical forests. This research project, funded by the Deutsche Forschungsgemeinschaft (DFG), will not only be conducted within a forest in Ecuador, but on an equal footing with the Ecuadorian scientific community in different institutions and with an Ecuadorian conservation organization (Fundación Jocotoco). Our goal is to strengthen ecological science and the next generation of scientists in both countries, as well as nature conservation efforts that meet the interests of local communities. To achieve these goals, transparent and accessible data and results are essential.

Latest Posts:

  • How much secondary forests buffer hot and dry extremes
    by Nico
    On a hot, sunny afternoon in the tropics, the buffering effect of forests becomes most evident: intact forests are several degrees cooler, and keeps the moisture in the soil and vegetation. Forests maintain much more favourable conditions not only for humans but for any living organism not adapted to heat and drought (if you don’t …
  • Rainforest recovery – optimistic results in a rather pessimistic global context
    by Nico
    Our recent article in Nature (see our Post here) may spark an optimistic viewpoint – animal communities in a tropical rainforest recover in a few decades, many of them even completely. Note that we only speak of a complete natural regeneration when, based on the species composition, a secondary forest can no longer be distinguished …
  • Rainforest recovery can be fast for most (but not all) of its components
    by Nico
    How long does it take for a tropical rainforest ecosystem to recover on its own from deforestation? The answer to this apparently simple question required a huge effort achieved by our entire Research Unit and a complex analysis across over 10’000 plant and animal species and over 23’000 bacteria sequences – and was now published …
  • Litter decomposition responds differently to small and large-scale disturbance
    by Edith Villa-Galaviz
    The paper led by Arianna Tartara explored the process by which fallen leaves are broken down to recycle nutrients back into the forest, recovers after disturbance in Ecuador’s lowland Chocó. Studying sites ranging from active cacao plantations to regenerating secondary forests and old-growth forest, they found that decomposition follows a U-shaped recovery pattern, dipping during …
  • Communities are not only limited by dispersion but also by habitat
    by Edith Villa-Galaviz
    In our recent paper lead by N. Grella and colleagues, we tackled a fundamental question in ecology: when a tropical forest recovers from disturbance, what determines which ant and termite species end up where, is it simply that some species can’t reach certain areas, or is it that the habitat itself filters who can survive …