Ecology of Duck Pond, Wellfleet, Massachusetts with special reference to the vertical distribution of the zooplankton
MacCoy, Clinton V.
MetadataShow full item record
During the summers of 1956 and 1957 an investigation was made of certain ecological relations involving light in Duck Pond, Wellfleet, Massachusetts, because of the unusually high clarity of the water. The maximum transparency observed (extinction coefficient, k = 0.11) was far greater than most ponds and about equal to that in the slope water beyond the continental shelf off the Atlantic coast. The illumination reaching the bottom of the pond at 18 m was 11% of the surface light and made possible a thick growth of Sphagnum at that depth. Phytoplankton was scarce and consisted mostly of minute forms. The zooplankton, which ranged in abundance up to 78 organisms per liter, consisted almost entirely of one species of copepod, Diaptomus minutus Lillj. Quantitative sampling of this population by means of a pump at a series of depths and at various hours of the day revealed a partial migration of this species from near the bottom to the surface at sunset on one occasion, but no large fraction of the population carried out a vertical migration on 4 other sunset periods or 2 sunrise periods subsequently studied. On certain of these occasions, however, there was a slight but detectib1e movement of the animals toward the surface at sunset followed by a redistribution to deeper levels. At sunrise the animals showed a tendency to move at first toward the surface and then away from it, although on one occasion the population remained quite evenly distributed at all levels. It is pointed out that because of the high transparency those zooplankters living in the pond are able to withstand high illumination at all depths. Relations between the extreme water clarity and the activities of the zooplankton, as well as other unusual features of the pond are discussed.
Originally issued as Reference No. 58-43, series later renamed WHOI- .
Suggested CitationTechnical Report: MacCoy, Clinton V., "Ecology of Duck Pond, Wellfleet, Massachusetts with special reference to the vertical distribution of the zooplankton", 1958-08, DOI:10.1575/1912/1214, https://hdl.handle.net/1912/1214
Showing items related by title, author, creator and subject.
Limits of Nematoscelis megalops in the northwestern Atlantic in relation to Gulf Stream cold core rings. I, Horizontal and vertical distributions Wiebe, Peter H.; Boyd, Steven H. (Woods Hole Oceanographic Institution, 1979-01)The hydrographic limit of the distribution of Nematoscelis megalops in the Northwestern Atlantic Ocean is usually marked by the abrupt changes in water properties across the Gulf Stream. There are, however, isolated but ...
The ecology of colonial radiolarians : their colony morphology, trophic interactions and associations, behavior, distribution, and the photosynthesis of their symbionts Swanberg, Neil Ralph (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1979-08)Colonial radiolarians (Spumellaria) are among the most common and abundant large zooplankton, but they have been little studied by modern biologists. Colonies were found on 98% of epipelagic diving stations in the period ...
The distribution of benthic biomass in hadal trenches : a modelling approach to investigate the effect of vertical and lateral organic matter transport to the seafloor Ichino, Matteo C.; Clark, Malcolm R.; Drazen, Jeffrey C.; Jamieson, Alan; Jones, Daniel O. B.; Martin, Adrian P.; Rowden, Ashley A.; Shank, Timothy M.; Yancey, Paul H.; Ruhl, Henry A. (Elsevier, 2015-02-19)Most of our knowledge about deep-sea habitats is limited to bathyal (200–3000 m) and abyssal depths (3000–6000 m), while relatively little is known about the hadal zone (6000–11,000 m). The basic paradigm for the distribution ...