Importance and seasonal availability of terrestrial invertebrates as prey for juvenile salmonids in floodplain spring brooks of the Kol River (Kamchatka, Russian Federation)
Abstract Energy and resource fluxes between terrestrial and aquatic habitats of river flood plains can have reciprocal influences on food webs. Floodplain spring brooks may contain high densities (>1 m −2 ) of juvenile fish even when aquatic food resources appear to be low. A likely explanation i...
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crwiley:10.1002/rra.1270 2024-09-15T18:15:56+00:00 Importance and seasonal availability of terrestrial invertebrates as prey for juvenile salmonids in floodplain spring brooks of the Kol River (Kamchatka, Russian Federation) Eberle, Lorri C. Stanford, Jack A. Wild Salmon Center Gordon and Betty Moore Foundation 2009 http://dx.doi.org/10.1002/rra.1270 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Frra.1270 https://onlinelibrary.wiley.com/doi/pdf/10.1002/rra.1270 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor River Research and Applications volume 26, issue 6, page 682-694 ISSN 1535-1459 1535-1467 journal-article 2009 crwiley https://doi.org/10.1002/rra.1270 2024-08-27T04:28:25Z Abstract Energy and resource fluxes between terrestrial and aquatic habitats of river flood plains can have reciprocal influences on food webs. Floodplain spring brooks may contain high densities (>1 m −2 ) of juvenile fish even when aquatic food resources appear to be low. A likely explanation is the allochthonous energy subsidy from riparian vegetation (e.g. leaves, invertebrates). To quantify this relationship in a rich salmon river ecosystem, we measured the temporal and spatial flux of terrestrial invertebrate and aquatic food resources in relation to diets of the two most abundant salmonid species in two spring brooks within early (<20 years) and late (>50 years) successional riparia on an expansive coastal flood plain of the Kol River, Kamchatka. Standing crops of benthic invertebrates and density of drifting invertebrates (dry mass) were fairly low (<4 g m −2 and <1 mg m −3 , respectively) at both sites, but annual average terrestrial invertebrate input among sites was 22.2 ± 0.1 mg m −2 day −1 . On average 68% of the coho salmon diet was of terrestrial origin, contrasting with 13% for Dolly Varden char at both sites, thus showing resource partitioning. Diet varied temporally and spatially with prey availability. Specifically, larvae of a weevil (Curculionidae) feeding on willow catkins were a dominant diet item for coho in the spring but only at the early successional site; Dolly Varden also ate these weevils but aquatic invertebrates continued to dominate their diets, further demonstrating behavioural segregation. The results show the importance of channel‐floodplain connectivity to management and conservation of salmon rivers. Copyright © 2009 John Wiley & Sons, Ltd. Article in Journal/Newspaper Kamchatka Wiley Online Library River Research and Applications 26 6 682 694 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract Energy and resource fluxes between terrestrial and aquatic habitats of river flood plains can have reciprocal influences on food webs. Floodplain spring brooks may contain high densities (>1 m −2 ) of juvenile fish even when aquatic food resources appear to be low. A likely explanation is the allochthonous energy subsidy from riparian vegetation (e.g. leaves, invertebrates). To quantify this relationship in a rich salmon river ecosystem, we measured the temporal and spatial flux of terrestrial invertebrate and aquatic food resources in relation to diets of the two most abundant salmonid species in two spring brooks within early (<20 years) and late (>50 years) successional riparia on an expansive coastal flood plain of the Kol River, Kamchatka. Standing crops of benthic invertebrates and density of drifting invertebrates (dry mass) were fairly low (<4 g m −2 and <1 mg m −3 , respectively) at both sites, but annual average terrestrial invertebrate input among sites was 22.2 ± 0.1 mg m −2 day −1 . On average 68% of the coho salmon diet was of terrestrial origin, contrasting with 13% for Dolly Varden char at both sites, thus showing resource partitioning. Diet varied temporally and spatially with prey availability. Specifically, larvae of a weevil (Curculionidae) feeding on willow catkins were a dominant diet item for coho in the spring but only at the early successional site; Dolly Varden also ate these weevils but aquatic invertebrates continued to dominate their diets, further demonstrating behavioural segregation. The results show the importance of channel‐floodplain connectivity to management and conservation of salmon rivers. Copyright © 2009 John Wiley & Sons, Ltd. |
author2 |
Wild Salmon Center Gordon and Betty Moore Foundation |
format |
Article in Journal/Newspaper |
author |
Eberle, Lorri C. Stanford, Jack A. |
spellingShingle |
Eberle, Lorri C. Stanford, Jack A. Importance and seasonal availability of terrestrial invertebrates as prey for juvenile salmonids in floodplain spring brooks of the Kol River (Kamchatka, Russian Federation) |
author_facet |
Eberle, Lorri C. Stanford, Jack A. |
author_sort |
Eberle, Lorri C. |
title |
Importance and seasonal availability of terrestrial invertebrates as prey for juvenile salmonids in floodplain spring brooks of the Kol River (Kamchatka, Russian Federation) |
title_short |
Importance and seasonal availability of terrestrial invertebrates as prey for juvenile salmonids in floodplain spring brooks of the Kol River (Kamchatka, Russian Federation) |
title_full |
Importance and seasonal availability of terrestrial invertebrates as prey for juvenile salmonids in floodplain spring brooks of the Kol River (Kamchatka, Russian Federation) |
title_fullStr |
Importance and seasonal availability of terrestrial invertebrates as prey for juvenile salmonids in floodplain spring brooks of the Kol River (Kamchatka, Russian Federation) |
title_full_unstemmed |
Importance and seasonal availability of terrestrial invertebrates as prey for juvenile salmonids in floodplain spring brooks of the Kol River (Kamchatka, Russian Federation) |
title_sort |
importance and seasonal availability of terrestrial invertebrates as prey for juvenile salmonids in floodplain spring brooks of the kol river (kamchatka, russian federation) |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1002/rra.1270 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Frra.1270 https://onlinelibrary.wiley.com/doi/pdf/10.1002/rra.1270 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
River Research and Applications volume 26, issue 6, page 682-694 ISSN 1535-1459 1535-1467 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/rra.1270 |
container_title |
River Research and Applications |
container_volume |
26 |
container_issue |
6 |
container_start_page |
682 |
op_container_end_page |
694 |
_version_ |
1810453902088208384 |