J. Jelle Lever

J. Jelle Lever
Eawag: Das Wasserforschungs-Institut des ETH-Bereichs | Eawag · Department of Surface Waters Research and Management

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9
Publications
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215
Citations

Publications

Publications (9)
Article
Full-text available
Changing conditions may lead to sudden shifts in the state of ecosystems when critical thresholds are passed. Some well‐studied drivers of such transitions lead to predictable outcomes such as a turbid lake or a degraded landscape. Many ecosystems are, however, complex systems of many interacting species. While detecting upcoming transitions in suc...
Article
Full-text available
The dynamics of complex systems, such as ecosystems, financial markets and the human brain, emerge from the interactions of numerous components. We often lack the knowledge to build reliable models for the behaviour of such network systems. This makes it difficult to predict potential instabilities. We show that one could use the natural fluctuatio...
Conference Paper
Background/Question/Methods Common ways of measuring the fragility of food webs is to examine their long-term stability in terms of species persistence or community dynamics. A food web is considered to be of high stability when most species survive in the long run. Such approaches overlook, however, another important element of community fragili...
Article
Full-text available
Declines in pollinator populations may harm biodiversity and agricultural productivity. Little attention has, however, been paid to the systemic response of mutualistic communities to global environmental change. Using a modelling approach and merging network theory with theory on critical transitions, we show that the scale and nature of critical...
Conference Paper
Background/Question/Methods Ecosystems have the capacity to go through sudden regime shifts from one seemingly stable state to another potentially less desirable state. Such transitions may occur locally --- affecting only a single part of the system --- or systemically, when many parts of the system go through a transition simultaneously. With...
Conference Paper
Background/Question/Methods In the last decades, increasingly strong concerns have been raised about declining pollinator abundances and its potential effects on the maintenance of biodiversity and agricultural productivity. A gradual decline in pollinator abundance may not necessarily remain gradual. Pollinator abundances may go through critical...

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