Understanding spatial distributions: negative density-dependence in prey causes predators to trade-off prey quantity with quality
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 asymp...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
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ftnioz:oai:imis.nioz.nl:254859 2023-05-15T15:48:26+02:00 Understanding spatial distributions: negative density-dependence in prey causes predators to trade-off prey quantity with quality Bijleveld, A.I. MacCurdy, R.B. Chan, Y.-C Penning, E. Gabrielson, R.M. Cluderay, J. Spaulding, E.L. Dekinga, A. Holthuijsen, S. Ten Horn, J. Brugge, M. van Gils, J.A. Winkler, D.W. Piersma, T. 2016 application/pdf https://www.vliz.be/imisdocs/publications/19/288619.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000375965600023 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1098/rspb.2015.1557 https://www.vliz.be/imisdocs/publications/19/288619.pdf info:eu-repo/semantics/openAccess %3Ci%3EProc.+-+Royal+Soc.,+Biol.+Sci.+283%3C%2Fi%3E%3A+1828.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1098%2Frspb.2015.1557%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1098%2Frspb.2015.1557%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2016 ftnioz https://doi.org/10.1098/rspb.2015.1557 2022-11-16T23:19:51Z 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 prey (edible cockles Cerastoderma edule) across 50 km² of mudflat, and simultaneously, with a novel time-of-arrival methodology, tracked their avian predators (red knots Calidris canutus). Because of negative density-dependence in the individual quality of cockles, the predicted energy intake rates of red knots declined at high prey densities (a type IV, rather than a type II functional response). Resource-selection modelling revealed that red knots indeed selected areas of intermediate cockle densities where energy intake rates were maximized given their phenotype-specific digestive constraints (as indicated by gizzard mass). Because negative density-dependence is common, we question the current consensus and suggest that predators commonly maximize their energy intake rates at intermediate prey densities. Prey density alone may thus poorly predict intake rates, carrying capacity and spatial distributions of predators. Article in Journal/Newspaper Calidris canutus NIOZ Repository (Royal Netherlands Institute for Sea Research) Proceedings of the Royal Society B: Biological Sciences 283 1828 20151557 |
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Open Polar |
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NIOZ Repository (Royal Netherlands Institute for Sea Research) |
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ftnioz |
language |
English |
description |
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 prey (edible cockles Cerastoderma edule) across 50 km² of mudflat, and simultaneously, with a novel time-of-arrival methodology, tracked their avian predators (red knots Calidris canutus). Because of negative density-dependence in the individual quality of cockles, the predicted energy intake rates of red knots declined at high prey densities (a type IV, rather than a type II functional response). Resource-selection modelling revealed that red knots indeed selected areas of intermediate cockle densities where energy intake rates were maximized given their phenotype-specific digestive constraints (as indicated by gizzard mass). Because negative density-dependence is common, we question the current consensus and suggest that predators commonly maximize their energy intake rates at intermediate prey densities. Prey density alone may thus poorly predict intake rates, carrying capacity and spatial distributions of predators. |
format |
Article in Journal/Newspaper |
author |
Bijleveld, A.I. MacCurdy, R.B. Chan, Y.-C Penning, E. Gabrielson, R.M. Cluderay, J. Spaulding, E.L. Dekinga, A. Holthuijsen, S. Ten Horn, J. Brugge, M. van Gils, J.A. Winkler, D.W. Piersma, T. |
spellingShingle |
Bijleveld, A.I. MacCurdy, R.B. Chan, Y.-C Penning, E. Gabrielson, R.M. Cluderay, J. Spaulding, E.L. Dekinga, A. Holthuijsen, S. Ten Horn, J. Brugge, M. van Gils, J.A. Winkler, D.W. Piersma, T. Understanding spatial distributions: negative density-dependence in prey causes predators to trade-off prey quantity with quality |
author_facet |
Bijleveld, A.I. MacCurdy, R.B. Chan, Y.-C Penning, E. Gabrielson, R.M. Cluderay, J. Spaulding, E.L. Dekinga, A. Holthuijsen, S. Ten Horn, J. Brugge, M. van Gils, J.A. Winkler, D.W. Piersma, T. |
author_sort |
Bijleveld, A.I. |
title |
Understanding spatial distributions: negative density-dependence in prey causes predators to trade-off prey quantity with quality |
title_short |
Understanding spatial distributions: negative density-dependence in prey causes predators to trade-off prey quantity with quality |
title_full |
Understanding spatial distributions: negative density-dependence in prey causes predators to trade-off prey quantity with quality |
title_fullStr |
Understanding spatial distributions: negative density-dependence in prey causes predators to trade-off prey quantity with quality |
title_full_unstemmed |
Understanding spatial distributions: negative density-dependence in prey causes predators to trade-off prey quantity with quality |
title_sort |
understanding spatial distributions: negative density-dependence in prey causes predators to trade-off prey quantity with quality |
publishDate |
2016 |
url |
https://www.vliz.be/imisdocs/publications/19/288619.pdf |
genre |
Calidris canutus |
genre_facet |
Calidris canutus |
op_source |
%3Ci%3EProc.+-+Royal+Soc.,+Biol.+Sci.+283%3C%2Fi%3E%3A+1828.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1098%2Frspb.2015.1557%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1098%2Frspb.2015.1557%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000375965600023 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1098/rspb.2015.1557 https://www.vliz.be/imisdocs/publications/19/288619.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1098/rspb.2015.1557 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
283 |
container_issue |
1828 |
container_start_page |
20151557 |
_version_ |
1766383410402557952 |