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Classification and ordination of benthic samples from Bedeque Bay, an estuary in Prince Edward Island, Canada

Classification and ordination of benthic samples from Bedeque Bay, an estuary in Prince Edward... 227 10 10 3 3 R. N. Hughes M. L. H. Thomas Department of Biology Dalhousie University Halifax Nova Scotia Canada Marine Ecology Laboratory, Bedford Institute Fisheries Research Board of Canada Dartmouth Nova Scotia Canada Department of Zoology University College of N. Wales Bangor Caernarvonshire N. Wales UK Abstract An attempt was made to identify the causes of the distribution of benthos within Bedeque Bay using multivariate techniques programmed for the computer. Both classification by a hierarchical cluster analysis, and ordination by principal components analysis suggested that a large proportion of the variance in the data was directly or indirectly correlated with a salinity gradient. Classification divided the species into two main groups, a in the upper half of the estuary where lower salinities and larger salinity fluctuations occurred, and group b in the lower half of the estuary with a more stable salinity regime. The group b species were further subdivided into those preferring soft mud and those preferring sandier sediments. The group a species were divided into a well-developed oyster association and various sub-groups less strongly associated with oysters. Five principal components were required to account for 50% of the variance in the data. The first axis accounted for 20% of the variance and was shown by a non-parametric test to be correlated with the salinity gradient. Axes II to V could not be interpreted, but possibly represented complex species interactions. By providing hard substrates and altering the natura of the sediment, oysters and mussels produced conditions suitable for many other species. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Marine Biology Springer Journals

Classification and ordination of benthic samples from Bedeque Bay, an estuary in Prince Edward Island, Canada

Marine Biology , Volume 10 (3) – Aug 1, 1971

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References (12)

Publisher
Springer Journals
Copyright
Copyright © 1971 by Springer-Verlag
Subject
Life Sciences; Biomedicine general; Oceanography; Ecology; Microbiology; Zoology
ISSN
0025-3162
eISSN
1432-1793
DOI
10.1007/BF00352811
Publisher site
See Article on Publisher Site

Abstract

227 10 10 3 3 R. N. Hughes M. L. H. Thomas Department of Biology Dalhousie University Halifax Nova Scotia Canada Marine Ecology Laboratory, Bedford Institute Fisheries Research Board of Canada Dartmouth Nova Scotia Canada Department of Zoology University College of N. Wales Bangor Caernarvonshire N. Wales UK Abstract An attempt was made to identify the causes of the distribution of benthos within Bedeque Bay using multivariate techniques programmed for the computer. Both classification by a hierarchical cluster analysis, and ordination by principal components analysis suggested that a large proportion of the variance in the data was directly or indirectly correlated with a salinity gradient. Classification divided the species into two main groups, a in the upper half of the estuary where lower salinities and larger salinity fluctuations occurred, and group b in the lower half of the estuary with a more stable salinity regime. The group b species were further subdivided into those preferring soft mud and those preferring sandier sediments. The group a species were divided into a well-developed oyster association and various sub-groups less strongly associated with oysters. Five principal components were required to account for 50% of the variance in the data. The first axis accounted for 20% of the variance and was shown by a non-parametric test to be correlated with the salinity gradient. Axes II to V could not be interpreted, but possibly represented complex species interactions. By providing hard substrates and altering the natura of the sediment, oysters and mussels produced conditions suitable for many other species.

Journal

Marine BiologySpringer Journals

Published: Aug 1, 1971

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