The effect of grazing by Littorina irrorata on edaphic and epiphytic communities of salt marsh diatoms /
(fecal) assemblages than in ingested (stomach). Most of the
| Main Author: | |
|---|---|
| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1994.
|
| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (fecal) assemblages than in ingested (stomach). Most of the alterniflora culms. A total of 206 diatom taxa, including 25 and April, and on the epiphytic community on S. alterniflora and fecal assemblages, but species richness did not. The assemblages enhanced survival following digestion by L. corresponded with the tidal exposure duration of sediment and effect of the snail's digestive activity on edaphic and epiphytic assemblages than in edaphic assemblages. The epiphytic diatom communities was demonstrated by comparing fecal) diatom assemblages from a Spartina alterniflora marsh feces, while larger species decreased in relative abundance. frustulum and N. punctata. Species composition differed in August. The alternation of the snail's feeding substrates intact cells in the feces of L. irrorata were of smaller irrorata fed predominantly on the exposed sediment in January irrorata. These characteristics include small size, a Jim) usually occurred in increased relative abundance in the obtained in January, April and August 1992. Littorina of intact cells). Smaller diatom species (cell length < 30 on the southern shore of West Galveston Bay, Texas, were parameters (species and cell size composition and percentage possession of a protective external mucilaginous tube. The relative abundance of intact cells was higher in egested relative abundance of intact diatom cells (viable or only resistant lipid (oil) and proteinaceous material which Samples of natural (ungrazed) and snail-ingested (stomach and Several characteristics of dominant species in fecal significantly by season and habitat among ungrazed, stomach size, and contained relatively greater amounts of digestion- stomach assemblages to fecal assemblages as to various streamlined shape, a highly-silicified cell wall, and the subsequently becomes available to other marsh heterotrophs. subtilis, Navicula tripunctata var. schizonemoides, Nitzschia the development of epiphytic community on Spartina The six most dominant species throughout the study period unidentified species, was recorded in three seasonal samples. were Achnanthes hauckiana, Amphora coffeaeformis, Denticula with cytoplasm-like internal materials) was higher in |
|---|---|
| Item Description: | "Major subject: Wildlife and Fisheries Sciences". Vita. |
| Physical Description: | viii, 88 leaves : illustrations ; maps ; 28 cm. Also available online. |
| Bibliography: | Includes bibliographical references. |