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Environmental Factors Affecting Nocturnal Migrations Of Macrobenthos, C. Timothy Morris
Environmental Factors Affecting Nocturnal Migrations Of Macrobenthos, C. Timothy Morris
Biological Sciences Theses & Dissertations
Nocturnally dispersing macrobenthic invertebrates of the Lafayette River, Norfolk, Virginia were collected from September 4 to October 4, 1982 to determine environmental factors affecting migrations. A total of 55 taxa were identified from 325 surface and bottom nocturnal plankton tows. Peracaridan crustaceans were the dominant (99.0% of the total density) group collected. Six of the commonly collected species showed a significant (P
The Role Of Colonization Predation And Season In Determining Macroinvertebrate Community Structure In A Temperate Lake, Cheryl Lynn Frew
The Role Of Colonization Predation And Season In Determining Macroinvertebrate Community Structure In A Temperate Lake, Cheryl Lynn Frew
Biological Sciences Theses & Dissertations
Field experiments were conducted to examine the effects of distance from shore, vertebrate predation, and season on macroinvertebrate colonization dynamics in a temperate lake in Suffolk, VA. In a year-long colonization study, artificial plants, half of which were caged to exclude vertebrate predators, were deployed in patches at three distances from shore (2m, 15m, 50m). Artificial plant subsamples were removed at weekly intervals over 28 days during four seasons to monitor colonization by macroinvertebrates. Colonization of artificial plants occurred more quickly in the summer and spring than in fall and winter. The interactive effect of distance from shore and cage …
A Quantitative Study Of The Aquatic Macroinvertebrates In An Irregularly Flooded Salt Marsh, Smith Island, Virginia, Leon L. Robert Jr.
A Quantitative Study Of The Aquatic Macroinvertebrates In An Irregularly Flooded Salt Marsh, Smith Island, Virginia, Leon L. Robert Jr.
Biological Sciences Theses & Dissertations
Little is known about the aquatic macroinvertebrate community structure in coastal salt marshes. This study investigated the aquatic macroinvertebrate community structure in a coastal Virginia salt marsh. Sixteen samples were taken weekly from two different sites on Smith Island, Virginia, from April to mid-October 1982. Bimonthly samples were taken during the months March and November due to low density of organisms and reduced growth rates at these times.
A total of 46 taxa were collected with 17 occurring regularly, indicating a relatively diverse fauna. Wide fluctuations in the physical parameters were observed; however, temporal changes in the macroinvertebrate community cannot …