Numerical, growth and secondary production responses of the benthic macroinvertebrate community to whole-lake enrichment in insular Newfoundland
Thesis (M.Sc.)--Memorial University of Newfoundland, 1995. Biology Bibliography: leaves 89-95. A whole-lake enrichment (N + P) experiment was conducted over a three-year period to evaluate the feasibility of boosting benthic productivity in insular Newfoundland lakes. Response of the benthic communi...
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ftmemorialunivdc:oai:collections.mun.ca:theses2/70692 2023-05-15T17:23:30+02:00 Numerical, growth and secondary production responses of the benthic macroinvertebrate community to whole-lake enrichment in insular Newfoundland Clarke, Keith, 1969- Memorial University of Newfoundland. Dept. of Biology Canada--Newfoundland and Labrador 1995 xiii, 111 leaves : ill., graphs. Image/jpeg; Application/pdf http://collections.mun.ca/cdm/ref/collection/theses2/id/70692 Eng eng Electronic Theses and Dissertations (13.04 MB) -- http://collections.mun.ca/PDFs/theses/Clarke_Keith.pdf 76245844 http://collections.mun.ca/cdm/ref/collection/theses2/id/70692 The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries Benthos--Newfoundland and Labrador Freshwater invertebrates--Newfoundland and Labrador Lake animals--Newfoundland and Labrador Lakes--Newfoundland and Labrador--Fertilization Text Electronic thesis or dissertation 1995 ftmemorialunivdc 2015-08-06T19:16:40Z Thesis (M.Sc.)--Memorial University of Newfoundland, 1995. Biology Bibliography: leaves 89-95. A whole-lake enrichment (N + P) experiment was conducted over a three-year period to evaluate the feasibility of boosting benthic productivity in insular Newfoundland lakes. Response of the benthic community to enrichment was monitored by a combination of biomonitoring (artificial substrate) and quantitative dredge sampling in both the enriched lake and two control lakes. -- Observations of benthic abundance through biomonitoring approaches revealed a continuum of positive numerical responses to enrichment. Responses were most rapid in short-lived herbivores such as chironomids, gastropods and sphaeriid clams while longer-lived detritivores (mayflies, amphipods) and predators (flatworms, leeches and dragonflies) demonstrated a slower, more modest numerical response. The benthic macroinvertebrate communities of the study lakes were composed of cosmopolitan species from the North American fauna in relatively low densities. Benthic biomass was dominated by gastropoda and the odonate Cordulia. Secondary production estimates were relatively low when compared to mainland systems. Short-lived herbivores (Amnicola, Phryganea) were observed to have increased secondary production in the enriched pond. Secondary production estimates were similar in the three study ponds for the other macroinvertebrate taxa. Some of these taxa were observed to have increased growth (Cordulia) and/or recruitment (Enallagma) late in the study. This pattern indicates that benthic macroinvertebrate community production was still increasing in the enriched pond. Thesis Newfoundland studies University of Newfoundland Memorial University of Newfoundland: Digital Archives Initiative (DAI) Canada Newfoundland |
institution |
Open Polar |
collection |
Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
op_collection_id |
ftmemorialunivdc |
language |
English |
topic |
Benthos--Newfoundland and Labrador Freshwater invertebrates--Newfoundland and Labrador Lake animals--Newfoundland and Labrador Lakes--Newfoundland and Labrador--Fertilization |
spellingShingle |
Benthos--Newfoundland and Labrador Freshwater invertebrates--Newfoundland and Labrador Lake animals--Newfoundland and Labrador Lakes--Newfoundland and Labrador--Fertilization Clarke, Keith, 1969- Numerical, growth and secondary production responses of the benthic macroinvertebrate community to whole-lake enrichment in insular Newfoundland |
topic_facet |
Benthos--Newfoundland and Labrador Freshwater invertebrates--Newfoundland and Labrador Lake animals--Newfoundland and Labrador Lakes--Newfoundland and Labrador--Fertilization |
description |
Thesis (M.Sc.)--Memorial University of Newfoundland, 1995. Biology Bibliography: leaves 89-95. A whole-lake enrichment (N + P) experiment was conducted over a three-year period to evaluate the feasibility of boosting benthic productivity in insular Newfoundland lakes. Response of the benthic community to enrichment was monitored by a combination of biomonitoring (artificial substrate) and quantitative dredge sampling in both the enriched lake and two control lakes. -- Observations of benthic abundance through biomonitoring approaches revealed a continuum of positive numerical responses to enrichment. Responses were most rapid in short-lived herbivores such as chironomids, gastropods and sphaeriid clams while longer-lived detritivores (mayflies, amphipods) and predators (flatworms, leeches and dragonflies) demonstrated a slower, more modest numerical response. The benthic macroinvertebrate communities of the study lakes were composed of cosmopolitan species from the North American fauna in relatively low densities. Benthic biomass was dominated by gastropoda and the odonate Cordulia. Secondary production estimates were relatively low when compared to mainland systems. Short-lived herbivores (Amnicola, Phryganea) were observed to have increased secondary production in the enriched pond. Secondary production estimates were similar in the three study ponds for the other macroinvertebrate taxa. Some of these taxa were observed to have increased growth (Cordulia) and/or recruitment (Enallagma) late in the study. This pattern indicates that benthic macroinvertebrate community production was still increasing in the enriched pond. |
author2 |
Memorial University of Newfoundland. Dept. of Biology |
format |
Thesis |
author |
Clarke, Keith, 1969- |
author_facet |
Clarke, Keith, 1969- |
author_sort |
Clarke, Keith, 1969- |
title |
Numerical, growth and secondary production responses of the benthic macroinvertebrate community to whole-lake enrichment in insular Newfoundland |
title_short |
Numerical, growth and secondary production responses of the benthic macroinvertebrate community to whole-lake enrichment in insular Newfoundland |
title_full |
Numerical, growth and secondary production responses of the benthic macroinvertebrate community to whole-lake enrichment in insular Newfoundland |
title_fullStr |
Numerical, growth and secondary production responses of the benthic macroinvertebrate community to whole-lake enrichment in insular Newfoundland |
title_full_unstemmed |
Numerical, growth and secondary production responses of the benthic macroinvertebrate community to whole-lake enrichment in insular Newfoundland |
title_sort |
numerical, growth and secondary production responses of the benthic macroinvertebrate community to whole-lake enrichment in insular newfoundland |
publishDate |
1995 |
url |
http://collections.mun.ca/cdm/ref/collection/theses2/id/70692 |
op_coverage |
Canada--Newfoundland and Labrador |
geographic |
Canada Newfoundland |
geographic_facet |
Canada Newfoundland |
genre |
Newfoundland studies University of Newfoundland |
genre_facet |
Newfoundland studies University of Newfoundland |
op_source |
Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries |
op_relation |
Electronic Theses and Dissertations (13.04 MB) -- http://collections.mun.ca/PDFs/theses/Clarke_Keith.pdf 76245844 http://collections.mun.ca/cdm/ref/collection/theses2/id/70692 |
op_rights |
The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. |
_version_ |
1766112840480980992 |