Changes in abundance, composition and controls within the plankton of a fertilised arctic lake
1. An oligotrophic arctic lake was fertilised with inorganic nitrogen and phosphorus as (NH4)2 NO3 and H3PO4 for five summers. The loading rate was 1.7–2.5 mmol N m–2 day–1 and 0.136–0.20 mmol P m–2 day–1 which is two to three times the annual loading of lakes in the area. The heterotrophic microzoo...
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ftunivnorthcag:oai:libres.uncg.edu/7570 2024-02-11T10:00:56+01:00 Changes in abundance, composition and controls within the plankton of a fertilised arctic lake NC DOCKS at The University of North Carolina at Greensboro Rublee, Parke A. 2002 http://libres.uncg.edu/ir/uncg/f/P_Rublee_Changes_2002.pdf English eng http://libres.uncg.edu/ir/uncg/f/P_Rublee_Changes_2002.pdf 2002 ftunivnorthcag 2024-01-27T23:44:46Z 1. An oligotrophic arctic lake was fertilised with inorganic nitrogen and phosphorus as (NH4)2 NO3 and H3PO4 for five summers. The loading rate was 1.7–2.5 mmol N m–2 day–1 and 0.136–0.20 mmol P m–2 day–1 which is two to three times the annual loading of lakes in the area. The heterotrophic microzooplankton community was enumerated during the experiment as well as 1 year pre- and post-treatment. 2. The structure of the microplankton community changed from a nutrient limited system, dominated by oligotrich protozoans and small-particle feeding rotifers, to a system dominated by a succession of peritrich protozoans and predatory rotifers. These peritrich protozoans and predatory rotifers were not present prior to fertilisation and never constituted more than a small fraction of the biomass in other lakes at the research site. The average biomass of the rotifers and protozoans was more than seven and a half times larger by the end of fertilisation than it was initially. 3. Because of the increases in numbers of individuals in these new taxa, the structure of the microbial food web changed. When fertilisation stopped, most parameters returned to prefertilisation levels within 1 year. Other/Unknown Material Arctic University of North Carolina: NC DOCKS (Digital Online Collection of Knowledge and Scholarship) Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) |
institution |
Open Polar |
collection |
University of North Carolina: NC DOCKS (Digital Online Collection of Knowledge and Scholarship) |
op_collection_id |
ftunivnorthcag |
language |
English |
description |
1. An oligotrophic arctic lake was fertilised with inorganic nitrogen and phosphorus as (NH4)2 NO3 and H3PO4 for five summers. The loading rate was 1.7–2.5 mmol N m–2 day–1 and 0.136–0.20 mmol P m–2 day–1 which is two to three times the annual loading of lakes in the area. The heterotrophic microzooplankton community was enumerated during the experiment as well as 1 year pre- and post-treatment. 2. The structure of the microplankton community changed from a nutrient limited system, dominated by oligotrich protozoans and small-particle feeding rotifers, to a system dominated by a succession of peritrich protozoans and predatory rotifers. These peritrich protozoans and predatory rotifers were not present prior to fertilisation and never constituted more than a small fraction of the biomass in other lakes at the research site. The average biomass of the rotifers and protozoans was more than seven and a half times larger by the end of fertilisation than it was initially. 3. Because of the increases in numbers of individuals in these new taxa, the structure of the microbial food web changed. When fertilisation stopped, most parameters returned to prefertilisation levels within 1 year. |
author |
NC DOCKS at The University of North Carolina at Greensboro Rublee, Parke A. |
spellingShingle |
NC DOCKS at The University of North Carolina at Greensboro Rublee, Parke A. Changes in abundance, composition and controls within the plankton of a fertilised arctic lake |
author_facet |
NC DOCKS at The University of North Carolina at Greensboro Rublee, Parke A. |
author_sort |
NC DOCKS at The University of North Carolina at Greensboro |
title |
Changes in abundance, composition and controls within the plankton of a fertilised arctic lake |
title_short |
Changes in abundance, composition and controls within the plankton of a fertilised arctic lake |
title_full |
Changes in abundance, composition and controls within the plankton of a fertilised arctic lake |
title_fullStr |
Changes in abundance, composition and controls within the plankton of a fertilised arctic lake |
title_full_unstemmed |
Changes in abundance, composition and controls within the plankton of a fertilised arctic lake |
title_sort |
changes in abundance, composition and controls within the plankton of a fertilised arctic lake |
publishDate |
2002 |
url |
http://libres.uncg.edu/ir/uncg/f/P_Rublee_Changes_2002.pdf |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) |
geographic |
Arctic Arctic Lake |
geographic_facet |
Arctic Arctic Lake |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
http://libres.uncg.edu/ir/uncg/f/P_Rublee_Changes_2002.pdf |
_version_ |
1790596659139313664 |