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Species Composition and Seasonality of New England Seaweeds Along an Open Coastal-estuarine Gradient by A. C. Mathieson; C. A. Penniman is a Earth and Planetary Sciences article available to read on EtoBox.

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The species composition and seasonal occurrence of seaweed populations at twelve sites in southern Maine and New Hampshire, U. S. A., ranging from offshore open coastal to inner estuarine habitats, were evaluated based upon extensive seasonal collections. Approximately 70% of the species (i. e. 141 of 202 taxa) exhibited cosmopolitan patterns of varying degrees; 67 species were restricted to the open coast and 21 to the Great Bay Estuary System. Only three species, Cladophora sericea, Enteromorpha prolifera and Ulva lactuca, occurred at all twelve sites. A diminution of the number of total species and perennial taxa and the ultimate dominance of green algae were noted in upstream habitats with fluctuating hydrographic conditions and limited rocky substrata. The open coastal sites were dominated by cold temperate species, while warm temperate or 'mixed floras' were more conspicuous within the Estuary. Varying phenological and longevity patterns were evident depending upon hydrographic and physical parameters.

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Author

A. C. Mathieson; C. A. Penniman

Published

1986

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)