Green algal ropes: A novel estuarine phenomenon in the gulf of Maine |
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| Authors: | R L Vadas Brian Beal |
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| Institution: | 1. Department of Botany and Plant Pathology, University of Maine, 202 Deering Hall, 04469, Orono, Maine
2. Science Department, University of Maine, 215 Science Building, 04654, Machias, Maine
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| Abstract: | During late summer and early autumn of both 1984 and 1985 we observed and photographed the development of a green algal bloom on intertidal mudflats in eastern Maine. The bloom culminated in the formation of thick (8–10 cm) mats and long (>50 m) erpentine rope-like structures. The algal mat was polytypic but composed primarily ofEnteromorpha intestinalis L. We describe the probable sequence of events which led to the formation of algal ropes. The processes involved appear to parallel the development of ball-like masses in other algae. Algal ropes developed after mat formation, as prevailing winds and tidal currents rolled individual and entwined strands across the mudflat. The great mass of algae eventually became embedded into the sediment surface producing anoxic conditions in the substrate up to several cm deep. The ecological significance and possible negative effects of this altered environment on a commercially important bivalve species are discussed. |
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