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| Orive, E; Iriarte, A; De Madariaga, I; Revilla, M. |
| In the Urdaibai estuary, despite its small volume in relation to the tidal prism, phytoplankton grows massively in the upper and intermediate zones of the estuary during summer when rainfall is low to moderate. Data obtained in 23 sampling transects along the longitudinal axis of the estuary, undertaken in July 1993 and August 1994, showed three distinct zones in terms of the phytoplankton species composition: in the upper zone the phytoplankton assemblage was dominated by the diatoms Cyclotella spp., the dinoflagellate Glenodinium foliaceum, cryptophytes and euglenophytes; in the intermediate zone the diatom Chaetoceros ceratosporus, the dinoflagellates Peridinium quinquecorne and Prorocentrum minimum and cryptophytes were the most abundant; in the lower... |
| Tipo: Text |
Palavras-chave: Phytoplancton; Hydrologie; Nutriment; Estuaire de Guernica; Phytoplankton; Hydrography; Nutrient; Urdaibai estuary. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00326/43687/43122.pdf |
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| Iriarte, A; Daneri, G; Garcia, Vmt; Purdie, Da; Crawford, Dw. |
| Rates of plankton community respiration and chlorophyll a levels were measured in water samples collected at several times of the year in the North Sea, and during July in the English Channel. Planktonic community respiration rates ranged from 0.025 to 0.830-mu-mol O2 l-1 h-1. At low and moderate chlorophyll a concentrations (0-5-mu-g l-1) the correlation between algal biomass and community respiration was not significant. However, respiration and chlorophyll a did correlate significantly and positively at chlorophyll a levels in excess of 5-mu-g l-1. This is discussed in terms of the relative contribution to the total community respiration of autotrophs and microheterotrophs. It is argued that at low and moderate chlorophyll a concentrations, the... |
| Tipo: Text |
Palavras-chave: PLANKTON; RESPIRATION; CHLOROPHYLL A; COASTAL WATERS; MICROHETEROTROPHS. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00101/21266/18877.pdf |
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