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Siliceous microfossil succession in the sediments of McLeod Bay, Great Slave Lake, Northwest Territories


Siliceous microfossil succession in the sediments of McLeod Bay, Great Slave Lake, Northwest Territories



Canadian Journal of Fisheries and Aquatic Sciences 47.10: 1865-1874



ISSN/ISBN: 0706-652X

DOI: 10.1139/f90-211

Quantitative analysis of biogenic silica and siliceous microfossils preserved in sediments of McLeod Bay, Great Slave Lake, NWT, Canada, shows increased abundance and modified species composition in more recent sediments. Most of the observed increase has apparently occurred in the post-industrial era. Although McLeod Bay remains highly oligotrophic, increased microfossil flux and changes in species composition indicate increasing nutrient supply. Since there is little apparent anthropogenic modification of the bay's drainage basin or biotic communities, atmospheric transport of nutrients from remote sources may be implicated.

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Accession: 018115889

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