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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1999
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.761112 |
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| _version_ | 1867169503365824512 |
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| author | Kucheruk, Nikita V |
| author_facet | Kucheruk, Nikita V |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Two shelf communities from the central part off the California Peninsula are described. The community of Amphiodia urtica - Nephtys ferruginea develops in the central part of the shelf within the depth range 95-105 m. The community of Nephtys ferruginea - Amphiura acrystata develops on the shelf edge at depth 110 m. Biomasses of both communities are very low (about 10 g/m**2). Species richness of the shelf community is high; more than 60 species occur in samples (43-51 species per a community). Various echinoderms and some other groups are abundant on the Californian shelf; these groups are absent in shelf areas of Peruvian and Benguela upwellings. Species structures of the communities were analyzed; the communities were shown to consist of coexisting, but not interacting guilds; this indicates that the communities are undersaturated with individuals. At the same time values of ABC-indices indicate that the communities are stable. We suggest that in this case adaptation to unfavorable but stable environment is observed (selection of species-stressolarents). An explanation seems to lie in the penetrating type of the upwelling in the Californian upwelling zone. Low biomass values seem to result from mass development of necto-benthic carnivorous crustaceans-galateids Pleuroncodes planiceps. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_761112 |
| institution | PANGAEA |
| language | en |
| publishDate | 1999 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Fauna composition of benthos communities in bottom sediments from the edge and the central part of the shelf in the California upwelling zone Kucheruk, Nikita V Archive of Ocean Data; ARCOD; DM38; DM38-3511; DM38-3530; Dmitry Mendeleev; East Pacific; Grab; GRAB Two shelf communities from the central part off the California Peninsula are described. The community of Amphiodia urtica - Nephtys ferruginea develops in the central part of the shelf within the depth range 95-105 m. The community of Nephtys ferruginea - Amphiura acrystata develops on the shelf edge at depth 110 m. Biomasses of both communities are very low (about 10 g/m**2). Species richness of the shelf community is high; more than 60 species occur in samples (43-51 species per a community). Various echinoderms and some other groups are abundant on the Californian shelf; these groups are absent in shelf areas of Peruvian and Benguela upwellings. Species structures of the communities were analyzed; the communities were shown to consist of coexisting, but not interacting guilds; this indicates that the communities are undersaturated with individuals. At the same time values of ABC-indices indicate that the communities are stable. We suggest that in this case adaptation to unfavorable but stable environment is observed (selection of species-stressolarents). An explanation seems to lie in the penetrating type of the upwelling in the Californian upwelling zone. Low biomass values seem to result from mass development of necto-benthic carnivorous crustaceans-galateids Pleuroncodes planiceps. |
| title | Fauna composition of benthos communities in bottom sediments from the edge and the central part of the shelf in the California upwelling zone |
| topic | Archive of Ocean Data; ARCOD; DM38; DM38-3511; DM38-3530; Dmitry Mendeleev; East Pacific; Grab; GRAB |
| url | https://doi.org/10.1594/PANGAEA.761112 |