Effect of low pH on the chemical composition of aquatic invertebrates from tundra ponds at the Smoking Hills, N.W.T., Canada
Experiments were conducted to compare the relative sensitivity and chemical composition of aquatic invertebrates (insects and crustaceans) exposed to low pH. Test organisms were collected from tundra ponds at the Smoking Hills, N.W.T. One of the ponds was alkaline (pH 8.2), the other was acidified (...
Published in: | Canadian Journal of Zoology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1983
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/z83-030 http://www.nrcresearchpress.com/doi/pdf/10.1139/z83-030 |
id |
crcansciencepubl:10.1139/z83-030 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/z83-030 2023-12-17T10:51:11+01:00 Effect of low pH on the chemical composition of aquatic invertebrates from tundra ponds at the Smoking Hills, N.W.T., Canada Havas, Magda Hutchinson, T. C. 1983 http://dx.doi.org/10.1139/z83-030 http://www.nrcresearchpress.com/doi/pdf/10.1139/z83-030 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 61, issue 1, page 241-249 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1983 crcansciencepubl https://doi.org/10.1139/z83-030 2023-11-19T13:39:15Z Experiments were conducted to compare the relative sensitivity and chemical composition of aquatic invertebrates (insects and crustaceans) exposed to low pH. Test organisms were collected from tundra ponds at the Smoking Hills, N.W.T. One of the ponds was alkaline (pH 8.2), the other was acidified (pH 2.8) as a result of natural SO 2 fumigations. Based on mortality rates, crustaceans were considerably more sensitive to low pH than insect larvae. Sensitive species (Crustacea: Daphnia middendorffiana, Diaptomus arcticus, Branchinecta paludosa, Lepidurus arcticus; and Diptera: Orthocladius consobrinus) were unable to maintain high internal levels of Na and Cl. K concentrations were also lower in dead and dying Daphnia but not in the more tolerant Diptera larvae (O. consobrinus and Chironomus riparius). There was a net loss of Ca at low pH, but this did not correlate with mortality. Daphnia middendorffiana recovered following brief exposure to pH4.0. During recovery Na and Cl concentrations returned to their original levels. Acid-exposed Daphnia became infected by pathogenic fungi. No evidence of fungal infection was observed in any of the other treatments. Water chemistry also altered the chemical composition of aquatic invertebrates. All of the crustaceans as well as the trichopteran Limnephilus pallens had lower body Na, Cl, and Ca concentrations in the acidified pond water than in the alkaline pond water adjusted to pH 4.5. Part of this difference in their chemical composition may be due to elevated Al concentrations in the acidified pond water. Article in Journal/Newspaper Tundra Canadian Science Publishing (via Crossref) Canada Smoking Hills ENVELOPE(-126.638,-126.638,69.559,69.559) Canadian Journal of Zoology 61 1 241 249 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Havas, Magda Hutchinson, T. C. Effect of low pH on the chemical composition of aquatic invertebrates from tundra ponds at the Smoking Hills, N.W.T., Canada |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Experiments were conducted to compare the relative sensitivity and chemical composition of aquatic invertebrates (insects and crustaceans) exposed to low pH. Test organisms were collected from tundra ponds at the Smoking Hills, N.W.T. One of the ponds was alkaline (pH 8.2), the other was acidified (pH 2.8) as a result of natural SO 2 fumigations. Based on mortality rates, crustaceans were considerably more sensitive to low pH than insect larvae. Sensitive species (Crustacea: Daphnia middendorffiana, Diaptomus arcticus, Branchinecta paludosa, Lepidurus arcticus; and Diptera: Orthocladius consobrinus) were unable to maintain high internal levels of Na and Cl. K concentrations were also lower in dead and dying Daphnia but not in the more tolerant Diptera larvae (O. consobrinus and Chironomus riparius). There was a net loss of Ca at low pH, but this did not correlate with mortality. Daphnia middendorffiana recovered following brief exposure to pH4.0. During recovery Na and Cl concentrations returned to their original levels. Acid-exposed Daphnia became infected by pathogenic fungi. No evidence of fungal infection was observed in any of the other treatments. Water chemistry also altered the chemical composition of aquatic invertebrates. All of the crustaceans as well as the trichopteran Limnephilus pallens had lower body Na, Cl, and Ca concentrations in the acidified pond water than in the alkaline pond water adjusted to pH 4.5. Part of this difference in their chemical composition may be due to elevated Al concentrations in the acidified pond water. |
format |
Article in Journal/Newspaper |
author |
Havas, Magda Hutchinson, T. C. |
author_facet |
Havas, Magda Hutchinson, T. C. |
author_sort |
Havas, Magda |
title |
Effect of low pH on the chemical composition of aquatic invertebrates from tundra ponds at the Smoking Hills, N.W.T., Canada |
title_short |
Effect of low pH on the chemical composition of aquatic invertebrates from tundra ponds at the Smoking Hills, N.W.T., Canada |
title_full |
Effect of low pH on the chemical composition of aquatic invertebrates from tundra ponds at the Smoking Hills, N.W.T., Canada |
title_fullStr |
Effect of low pH on the chemical composition of aquatic invertebrates from tundra ponds at the Smoking Hills, N.W.T., Canada |
title_full_unstemmed |
Effect of low pH on the chemical composition of aquatic invertebrates from tundra ponds at the Smoking Hills, N.W.T., Canada |
title_sort |
effect of low ph on the chemical composition of aquatic invertebrates from tundra ponds at the smoking hills, n.w.t., canada |
publisher |
Canadian Science Publishing |
publishDate |
1983 |
url |
http://dx.doi.org/10.1139/z83-030 http://www.nrcresearchpress.com/doi/pdf/10.1139/z83-030 |
long_lat |
ENVELOPE(-126.638,-126.638,69.559,69.559) |
geographic |
Canada Smoking Hills |
geographic_facet |
Canada Smoking Hills |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
Canadian Journal of Zoology volume 61, issue 1, page 241-249 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z83-030 |
container_title |
Canadian Journal of Zoology |
container_volume |
61 |
container_issue |
1 |
container_start_page |
241 |
op_container_end_page |
249 |
_version_ |
1785576372834402304 |