The trophic interactions of young Arctic grayling ( Thymallus arcticus ) in an Arctic tundra stream
1. Young (0+) Arctic grayling (Thymallus arcticus ) have the potential to control the trophic structure of Arctic tundra streams through consumption, nutrient excretion and the modification of prey behaviour. The effect of young grayling on three trophic levels (algae, invertebrates and fish) was in...
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1998
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Online Access: | http://dx.doi.org/10.1046/j.1365-2427.1998.00314.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2427.1998.00314.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2427.1998.00314.x |
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crwiley:10.1046/j.1365-2427.1998.00314.x 2023-12-03T10:15:37+01:00 The trophic interactions of young Arctic grayling ( Thymallus arcticus ) in an Arctic tundra stream Golden, Heidi E. Deegan, And Linda A. 1998 http://dx.doi.org/10.1046/j.1365-2427.1998.00314.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2427.1998.00314.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2427.1998.00314.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Freshwater Biology volume 39, issue 4, page 637-648 ISSN 0046-5070 1365-2427 Aquatic Science journal-article 1998 crwiley https://doi.org/10.1046/j.1365-2427.1998.00314.x 2023-11-09T14:12:35Z 1. Young (0+) Arctic grayling (Thymallus arcticus ) have the potential to control the trophic structure of Arctic tundra streams through consumption, nutrient excretion and the modification of prey behaviour. The effect of young grayling on three trophic levels (algae, invertebrates and fish) was investigated by manipulating fish density and by fertilizing the river with phosphorus (P). 2. Nutrients, epilithic chlorophyll a , benthic invertebrates and fish biomass were measured within each fish density treatment (0, 4, and 40 fish m –2 ) within the P‐limited reference zone and the P‐enriched fertilized zone of the Kuparuk River, Alaska. 3. Epilithic chlorophyll a increased with increased fish density in both reference and fertilized zones, while mayfly density decreased with increased fish density in the fertilized zone only. Final mean mass of young grayling in the 40 fish m –2 cages was lower than mean mass in the 4 fish m –2 cages. 4. Young grayling may produce a top‐down cascading trophic effect in areas where nutrients are not limited. 5. River nutrient status and river discharge may modify the strength of top‐down control by young grayling. Article in Journal/Newspaper Arctic grayling Arctic Thymallus arcticus Tundra Alaska Wiley Online Library (via Crossref) Arctic Freshwater Biology 39 4 637 648 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Golden, Heidi E. Deegan, And Linda A. The trophic interactions of young Arctic grayling ( Thymallus arcticus ) in an Arctic tundra stream |
topic_facet |
Aquatic Science |
description |
1. Young (0+) Arctic grayling (Thymallus arcticus ) have the potential to control the trophic structure of Arctic tundra streams through consumption, nutrient excretion and the modification of prey behaviour. The effect of young grayling on three trophic levels (algae, invertebrates and fish) was investigated by manipulating fish density and by fertilizing the river with phosphorus (P). 2. Nutrients, epilithic chlorophyll a , benthic invertebrates and fish biomass were measured within each fish density treatment (0, 4, and 40 fish m –2 ) within the P‐limited reference zone and the P‐enriched fertilized zone of the Kuparuk River, Alaska. 3. Epilithic chlorophyll a increased with increased fish density in both reference and fertilized zones, while mayfly density decreased with increased fish density in the fertilized zone only. Final mean mass of young grayling in the 40 fish m –2 cages was lower than mean mass in the 4 fish m –2 cages. 4. Young grayling may produce a top‐down cascading trophic effect in areas where nutrients are not limited. 5. River nutrient status and river discharge may modify the strength of top‐down control by young grayling. |
format |
Article in Journal/Newspaper |
author |
Golden, Heidi E. Deegan, And Linda A. |
author_facet |
Golden, Heidi E. Deegan, And Linda A. |
author_sort |
Golden, Heidi E. |
title |
The trophic interactions of young Arctic grayling ( Thymallus arcticus ) in an Arctic tundra stream |
title_short |
The trophic interactions of young Arctic grayling ( Thymallus arcticus ) in an Arctic tundra stream |
title_full |
The trophic interactions of young Arctic grayling ( Thymallus arcticus ) in an Arctic tundra stream |
title_fullStr |
The trophic interactions of young Arctic grayling ( Thymallus arcticus ) in an Arctic tundra stream |
title_full_unstemmed |
The trophic interactions of young Arctic grayling ( Thymallus arcticus ) in an Arctic tundra stream |
title_sort |
trophic interactions of young arctic grayling ( thymallus arcticus ) in an arctic tundra stream |
publisher |
Wiley |
publishDate |
1998 |
url |
http://dx.doi.org/10.1046/j.1365-2427.1998.00314.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2427.1998.00314.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2427.1998.00314.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic grayling Arctic Thymallus arcticus Tundra Alaska |
genre_facet |
Arctic grayling Arctic Thymallus arcticus Tundra Alaska |
op_source |
Freshwater Biology volume 39, issue 4, page 637-648 ISSN 0046-5070 1365-2427 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-2427.1998.00314.x |
container_title |
Freshwater Biology |
container_volume |
39 |
container_issue |
4 |
container_start_page |
637 |
op_container_end_page |
648 |
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1784262502045974528 |