Response of Amphipoda and Trichoptera to Lake Fertilization in the Canadian Arctic
Small oligotrophic lakes at Saqvaqjuac, Northwest Territories, were fertilized with phosphorus and nitrogen after 2 yr of study and the response of macroinvertebrates to increased primary production was followed for 3 yr. The amphipod Gammarus lacustris lacustris (G. O. Sars) had a 2-yr life cycle,...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1992
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Online Access: | http://dx.doi.org/10.1139/f92-259 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-259 |
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crcansciencepubl:10.1139/f92-259 2023-12-17T10:26:12+01:00 Response of Amphipoda and Trichoptera to Lake Fertilization in the Canadian Arctic Jorgenson, John K. Welch, Harold E. Curtis, Martin F. 1992 http://dx.doi.org/10.1139/f92-259 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-259 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 11, page 2354-2362 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1992 crcansciencepubl https://doi.org/10.1139/f92-259 2023-11-19T13:39:19Z Small oligotrophic lakes at Saqvaqjuac, Northwest Territories, were fertilized with phosphorus and nitrogen after 2 yr of study and the response of macroinvertebrates to increased primary production was followed for 3 yr. The amphipod Gammarus lacustris lacustris (G. O. Sars) had a 2-yr life cycle, with three cohorts present in August. Biomass under natural conditions was approximately 0.1–0.2 g dry wt∙m −2 . Gammarus responded immediately to a doubling of phytoplankton production with increased survival of young-of-year. Gammarus biomass increased steadily to 0.9 g dry wt∙m −2 and had not stabilized after 3 yr of fertilization. Trichoptera were represented by three species, with Grensia praeterita composing the bulk of the biomass, followed by Apatania zonella and an uncommon Hesperophylax species. Trichoptera biomass ranged from 0.04 to 0.3 g dry wt∙m −2 before fertilization. Response to increased primary production was slow, beginning in year 2 of fertilization. Trichoptera biomass had doubled by the third year of fertilization but was probably several years from equilibrium. Application of benthos models, in addition to the data, suggested that the production to biomass ratio was between 1 and 2, averaging 1.5. Article in Journal/Newspaper Arctic Northwest Territories Phytoplankton Canadian Science Publishing (via Crossref) Arctic Northwest Territories Canadian Journal of Fisheries and Aquatic Sciences 49 11 2354 2362 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Jorgenson, John K. Welch, Harold E. Curtis, Martin F. Response of Amphipoda and Trichoptera to Lake Fertilization in the Canadian Arctic |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Small oligotrophic lakes at Saqvaqjuac, Northwest Territories, were fertilized with phosphorus and nitrogen after 2 yr of study and the response of macroinvertebrates to increased primary production was followed for 3 yr. The amphipod Gammarus lacustris lacustris (G. O. Sars) had a 2-yr life cycle, with three cohorts present in August. Biomass under natural conditions was approximately 0.1–0.2 g dry wt∙m −2 . Gammarus responded immediately to a doubling of phytoplankton production with increased survival of young-of-year. Gammarus biomass increased steadily to 0.9 g dry wt∙m −2 and had not stabilized after 3 yr of fertilization. Trichoptera were represented by three species, with Grensia praeterita composing the bulk of the biomass, followed by Apatania zonella and an uncommon Hesperophylax species. Trichoptera biomass ranged from 0.04 to 0.3 g dry wt∙m −2 before fertilization. Response to increased primary production was slow, beginning in year 2 of fertilization. Trichoptera biomass had doubled by the third year of fertilization but was probably several years from equilibrium. Application of benthos models, in addition to the data, suggested that the production to biomass ratio was between 1 and 2, averaging 1.5. |
format |
Article in Journal/Newspaper |
author |
Jorgenson, John K. Welch, Harold E. Curtis, Martin F. |
author_facet |
Jorgenson, John K. Welch, Harold E. Curtis, Martin F. |
author_sort |
Jorgenson, John K. |
title |
Response of Amphipoda and Trichoptera to Lake Fertilization in the Canadian Arctic |
title_short |
Response of Amphipoda and Trichoptera to Lake Fertilization in the Canadian Arctic |
title_full |
Response of Amphipoda and Trichoptera to Lake Fertilization in the Canadian Arctic |
title_fullStr |
Response of Amphipoda and Trichoptera to Lake Fertilization in the Canadian Arctic |
title_full_unstemmed |
Response of Amphipoda and Trichoptera to Lake Fertilization in the Canadian Arctic |
title_sort |
response of amphipoda and trichoptera to lake fertilization in the canadian arctic |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/f92-259 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-259 |
geographic |
Arctic Northwest Territories |
geographic_facet |
Arctic Northwest Territories |
genre |
Arctic Northwest Territories Phytoplankton |
genre_facet |
Arctic Northwest Territories Phytoplankton |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 11, page 2354-2362 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f92-259 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
49 |
container_issue |
11 |
container_start_page |
2354 |
op_container_end_page |
2362 |
_version_ |
1785577925467176960 |