HABITAT SATURATION DRIVES THRESHOLDS IN STREAM SUBSIDIES
Understanding how abundance regulates the effects of organisms on their ecosystems remains a critical goal of ecology, especially for understanding inter-ecosystem transfers of energy and nutrients. Here we examined how territoriality and nest-digging by anadromous salmon mediate trophic subsidies t...
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ftdatacite:10.6084/m9.figshare.c.3300161.v1 2023-05-15T14:31:23+02:00 HABITAT SATURATION DRIVES THRESHOLDS IN STREAM SUBSIDIES Moore, Jonathan W. Schindler, Daniel E. Ruff, Casey P. 2016 https://dx.doi.org/10.6084/m9.figshare.c.3300161.v1 https://figshare.com/collections/HABITAT_SATURATION_DRIVES_THRESHOLDS_IN_STREAM_SUBSIDIES/3300161/1 unknown Figshare https://dx.doi.org/10.1890/07-1269.1 https://dx.doi.org/10.6084/m9.figshare.c.3300161 CC-BY http://creativecommons.org/licenses/by/3.0/us CC-BY Environmental Science Ecology FOS Biological sciences Collection article 2016 ftdatacite https://doi.org/10.6084/m9.figshare.c.3300161.v1 https://doi.org/10.1890/07-1269.1 https://doi.org/10.6084/m9.figshare.c.3300161 2021-11-05T12:55:41Z Understanding how abundance regulates the effects of organisms on their ecosystems remains a critical goal of ecology, especially for understanding inter-ecosystem transfers of energy and nutrients. Here we examined how territoriality and nest-digging by anadromous salmon mediate trophic subsidies to stream fishes. Salmon eggs become available for consumption primarily by the digging of salmon that superimpose their nests on previous nests. An individual-based model of spawning salmon predicted that territoriality and habitat saturation produce a nonlinear effect of salmon density on numbers of available eggs to resident predators. Field studies in Alaskan streams found that higher densities of salmon produce disproportionately more eggs in stream drift and in diets of resident fishes (Arctic grayling and rainbow trout). Bioenergetics model simulations indicated that these subsidies produce substantially enhanced growth rates of trout. These results demonstrate that small changes in salmon abundance can drive large changes in subsidies to stream food webs. Thus, the ecological consequences of population declines of keystone species, such as salmon, will be exacerbated when behavior generates nonlinear impacts. Article in Journal/Newspaper Arctic grayling Arctic DataCite Metadata Store (German National Library of Science and Technology) Arctic |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Environmental Science Ecology FOS Biological sciences |
spellingShingle |
Environmental Science Ecology FOS Biological sciences Moore, Jonathan W. Schindler, Daniel E. Ruff, Casey P. HABITAT SATURATION DRIVES THRESHOLDS IN STREAM SUBSIDIES |
topic_facet |
Environmental Science Ecology FOS Biological sciences |
description |
Understanding how abundance regulates the effects of organisms on their ecosystems remains a critical goal of ecology, especially for understanding inter-ecosystem transfers of energy and nutrients. Here we examined how territoriality and nest-digging by anadromous salmon mediate trophic subsidies to stream fishes. Salmon eggs become available for consumption primarily by the digging of salmon that superimpose their nests on previous nests. An individual-based model of spawning salmon predicted that territoriality and habitat saturation produce a nonlinear effect of salmon density on numbers of available eggs to resident predators. Field studies in Alaskan streams found that higher densities of salmon produce disproportionately more eggs in stream drift and in diets of resident fishes (Arctic grayling and rainbow trout). Bioenergetics model simulations indicated that these subsidies produce substantially enhanced growth rates of trout. These results demonstrate that small changes in salmon abundance can drive large changes in subsidies to stream food webs. Thus, the ecological consequences of population declines of keystone species, such as salmon, will be exacerbated when behavior generates nonlinear impacts. |
format |
Article in Journal/Newspaper |
author |
Moore, Jonathan W. Schindler, Daniel E. Ruff, Casey P. |
author_facet |
Moore, Jonathan W. Schindler, Daniel E. Ruff, Casey P. |
author_sort |
Moore, Jonathan W. |
title |
HABITAT SATURATION DRIVES THRESHOLDS IN STREAM SUBSIDIES |
title_short |
HABITAT SATURATION DRIVES THRESHOLDS IN STREAM SUBSIDIES |
title_full |
HABITAT SATURATION DRIVES THRESHOLDS IN STREAM SUBSIDIES |
title_fullStr |
HABITAT SATURATION DRIVES THRESHOLDS IN STREAM SUBSIDIES |
title_full_unstemmed |
HABITAT SATURATION DRIVES THRESHOLDS IN STREAM SUBSIDIES |
title_sort |
habitat saturation drives thresholds in stream subsidies |
publisher |
Figshare |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.3300161.v1 https://figshare.com/collections/HABITAT_SATURATION_DRIVES_THRESHOLDS_IN_STREAM_SUBSIDIES/3300161/1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic grayling Arctic |
genre_facet |
Arctic grayling Arctic |
op_relation |
https://dx.doi.org/10.1890/07-1269.1 https://dx.doi.org/10.6084/m9.figshare.c.3300161 |
op_rights |
CC-BY http://creativecommons.org/licenses/by/3.0/us |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.3300161.v1 https://doi.org/10.1890/07-1269.1 https://doi.org/10.6084/m9.figshare.c.3300161 |
_version_ |
1766305038216462336 |