Journal
MARINE POLLUTION BULLETIN
Volume 121, Issue 1-2, Pages 339-351Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2017.06.024
Keywords
Nutrient loading; Plankton; Prince Edward Island; Environmental indicators; Water quality; Palynology
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canadian Association of Palynology (CAP)
- Geological Society of America (GSA)
- NSERC
- NSERC CREATE (Collaborative Research and Training Experience) grant
- Canadian Watershed Research Consortium
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We analyzed surface sediments from 23 northeast USA estuaries, from Maine to Delaware, and nine estuaries from Prince Edward Island (PEI, Canada), to determine how dinoflagellate cyst assemblages varied with nutrient loading. Overall the abundance of cysts of heterotrophic dinoflagellates correlates with modeled nitrogen loading, but there were also regional signals. On PEI cysts of Gymnodiniwn microreticulatum characterized estuaries with high nitrogen loading while the sediments of eutrophic Boston Harbor were characterized by high abundances of Spinifentes spp. In Delaware Bay and the Delaware Inland Bays Polysphaeridiwn zohatyi correlated with higher temperatures and nutrient loading. This is the first study to document the dinoflagellate cyst eutrophication signal at such a large geographic scale in estuaries, thus confirming their value as indicators of water quality change and anthropogenic impact.
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