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| Do physical and chemical factors structure the macrobenthic community at a continental slope in the NE Atlantic? Flach, E.; Thomsen, L. (1998). Do physical and chemical factors structure the macrobenthic community at a continental slope in the NE Atlantic?, in: Baden, S. et al. Recruitment, colonization, and physical-chemical forcing in marine biological systems: Proceedings of the 32nd European Marine Biology Symposium, held in Lysekil, Sweden, 16-22 August 1997. Developments in Hydrobiology, 132: pp. 265-285. https://dx.doi.org/10.1007/978-94-017-2864-5_22
In: Baden, S. et al. (1998). Recruitment, colonization, and physical-chemical forcing in marine biological systems: Proceedings of the 32nd European Marine Biology Symposium, held in Lysekil, Sweden, 16-22 August 1997. European Marine Biology Symposia, 32. Developments in Hydrobiology, 132. ISBN 978-0-7923-5273-0; e-ISBN 978-94-017-2864-5. IX, 380 pp. https://dx.doi.org/10.1007/978-94-017-2864-5
In: European Marine Biology Symposia.
Is gerelateerd aan: Flach, E.; Thomsen, L. (1998). Do physical and chemical factors structure the macrobenthic community at a continental slope in the NE Atlantic? Hydrobiologia 375: 265-285. https://dx.doi.org/10.1023/A:1017009409743, meer
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| Beschikbaar in | Auteurs |
| Documenttype: Congresbijdrage | |
| Trefwoorden |
Aquatic organisms > Heterotrophic organisms > Filter feeders Population characteristics > Population density Population characteristics > Population structure Properties > Physicochemical properties Topographic features > Submarine features > Continental slope Velocity > Current velocity North Atlantic Ocean [Marine Regions] Marien/Kust |
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| Abstract |
 100 km NNW and one along the slope at 3500 m water depth situated 200 km SSE of the OMEX-transect. An overall trend in decrease in density and biomass with increasing water depth was found, but no depth related pattern in mean individual weight could be observed. Mean individual weight, however, did show a negative relationship with flow velocities. Correspondence-analyses and single linkage clustering of the community structure showed three more or less depth related clusters, representing a shelf community, an upper-slope and a lower-slope community. These clusters coincided with differences in grain-size, % organic C and total N within the sediment and differences in flow velocities. However, some of the stations at similar depths were not clustered together. Grain-size did not differ at stations with similar depth, but the % of C and N and flow velocities could differ markedly. Stations at similar depth, but with different physical and/or chemical conditions showed differences in density, biomass, mean individual weight and in macrobenthic community structure. More filter-feeding taxa were observed at stations with higher flow velocities, whereas more subsurface deposit-feeders were found at stations with higher sedimentation rates. Thus, besides the effects of water depth on macrobenthic community structure, other physical and chemical factors (such as flow velocities and organic matter supply) can be important structuring factors as well. |
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