Data from: Individual shifts toward safety explain age-related foraging distribution in a gregarious shorebirdPiet J. Van Den Hout, Theunis Piersma, Job Ten Horn, Bernard Spaans & Tamar Lok
Although age-related spatial segregation is ubiquitous, the underlying mechanisms are poorly understood. Here, we aim to elucidate the processes behind a previously established age-related foraging distribution of red knots (Calidris canutus canutus) in their main wintering area in West Africa (Banc d’Arguin, Mauritania). Based on 10 years of observations of 1232 uniquely color-ringed individuals of 1 to 18+ years old, we examined whether the observed age-related foraging distribution resulted from 1) spatial differences in mortality...
Data from: Understanding spatial distributions: negative density-dependence in prey causes predators to trade-off prey quantity with qualityAllert I. Bijleveld, Robert B. MacCurdy, Ying-Chi Chan, Emma Penning, Richard M Gabrielson, John Cluderay, Eric L. Spaulding, Anne Dekinga, Sander Holthuijsen, Job Ten Horn, Maarten Brugge, Jan A. Van Gils, David W. Winkler, Theunis Piersma & Rich M. Gabrielson
Negative density-dependence is generally studied within a single trophic level, thereby neglecting its effect on higher trophic levels. The ‘functional response’ couples a predator's intake rate to prey density. Most widespread is a type II functional response, where intake rate increases asymptotically with prey density; this predicts the highest predator densities at the highest prey densities. In one of the most stringent tests of this generality to date, we measured density and quality of bivalve...
The diversity and structure of ecosystems has been found to depend both on trophic interactions in food webs and on other species interactions such as habitat modification and mutualism that form non-trophic interaction networks. However, quantification of the dependencies between these two main interaction networks has remained elusive. In this study, we assessed how habitat-modifying organisms affect basic food web properties by conducting in-depth empirical investigations of two ecosystems: North American temperate fringing marshes and...
Data from: Body shrinkage due to Arctic warming reduces red knot fitness in tropical wintering rangeJan A. Van Gils, Simeon Lisovski, Tamar Lok, Włodzimierz Meissner, Agnieszka Ożarowska, Jimmy De Fouw, Eldar Rakhiemberdiev, Mikhail Y. Soloviev, Theunis Piersma & Marcel Klaassen
Reductions in body size are increasingly being identified as a response to climate warming. Here we present evidence for a case of such body shrinkage, potentially due to malnutrition in early life. We show that an avian long-distance migrant (red knot, Calidris canutus canutus), which is experiencing globally unrivaled warming rates at its high-Arctic breeding grounds, produces smaller offspring with shorter bills during summers with early snowmelt. This has consequences half a world away at...
After the dramatic eutrophication-induced decline of intertidal seagrasses in the 1970s, the Wadden Sea has shown diverging developments. In the northern Wadden Sea, seagrass beds have expanded and become denser, while in the southern Wadden Sea, only small beds with low shoot densities are found. A lack of documentation of historical distributions hampers conservation management. Yet, the recovery in the northern Wadden Sea provides opportunity to construct robust habitat suitability models to support management. We...
Droughts are increasing in severity and frequency, yet the mechanisms that strengthen ecosystem resilience to this stress remain poorly understood. Here, we test whether positive interactions in the form of a mutualism between mussels and dominant cordgrass in salt marshes enhance ecosystem resistance to and recovery from drought. Surveys spanning 250 km of southeastern US coastline reveal spatially dispersed mussel mounds increased cordgrass survival during severe drought by 5- to 25-times. Surveys and mussel addition...
Royal Netherlands Institute for Sea Research6
Radboud University Nijmegen3
University of Groningen2
University of Florida2
Moscow State University1
University of Gdańsk1
French National Centre for Scientific Research1
Alfred Wegener Institute for Polar and Marine Research1