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| Herndl, G; Velimirov, B. |
| Bacterial density of the coelenteric fluid (CF) of some anthozoan species was determined in situ and under laboratory conditions. In all species examined bacterial density of the CF was higher in the gastral cavity than in ambient ranging from 10 super(5) up to 5 x 10 super(6) cells. ml super(-1). Incubation experiments with the CF indicate that a bacterial population within the coelenteron is efficiently controlled by the CF, favoring bacterial growth if bacterial densities are low in the CF and showing clearance activity at high bacterial densities. Feeding of pre-starved anthozoans caused a rapid response of coelenteric rod-shaped bacteria. Evidence is presented that coelenteric bacteria are digested periodically although they contribute 1% to the... |
| Tipo: Text |
Palavras-chave: Anthozoa; Coelomic fluids; Bacteria; Microorganisms; Interspecific relationships; Metabolism; Nutrition. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-989.pdf |
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| Velimirov, B. |
| Observing that wave induced sweeping of the fronds of plants at the edges of kelp patches results in a relatively barren interface between kelp plants and the surrounding animal patches led to the assumption that: a) kelp sweeping could provide protection for macrophytes from grazers; and b) that it could be a mechanism allowing kelp patch expansion. The validity of the hypothesis was supported by quantitative observations on the sweeping capabilities of individual kelp plants and by characteristic species/biomass distributions within the kelp sweeping zone, the kelp patches and the adjacent animal patches. In addition, experimental clearing of the primary substrate within the various areas showed that free space will be completely occupied within 50 days... |
| Tipo: Text |
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| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/00247/35797/34310.pdf |
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