The continental shelf of Crete:structure of macrobenthic communities
| Autor: | Ioannis Karakassis, Anastasios Eleftheriou |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
0106 biological sciences
Mediterranean climate Biomass (ecology) Chlorophyll a geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Ecology Continental shelf 010604 marine biology & hydrobiology Fauna Aquatic Science 01 natural sciences chemistry.chemical_compound Oceanography chemistry Abundance (ecology) Phytoplankton Sedimentary rock 14. Life underwater Ecology Evolution Behavior and Systematics Geology 0105 earth and related environmental sciences |
| Zdroj: | Marine Ecology Progress Series. 160:185-196 |
| ISSN: | 1616-1599 0171-8630 |
| DOI: | 10.3354/meps160185 |
| Popis: | The analysis of 99 quantitative macrobenthic samples taken from the Cretan shelf at depths ranging from 40 to 190 m yielded 547 species from a total of 18858 individuals. Both average abundance and blomass decreased with depth in this zone by 85 and 75% respect~vely. The fauna was not consistently related to the biocoenoses proposed for the Mediterranean, a t least with regard to the distribution of characteristic species in the sampled stations. Diversity also decreased with depth, result~ng in a rather impoverished fauna towards the outer shelf. The main factors explaining the overall macrofaunal distribution were depth and chlorophyll a, while further analysis for the 4 different groups of stations identified by cluster analysis revealed that factors controlling the structure of the assemblages also change with depth: in the shallow stations sedimentary characteristics such a s grain size play an important role while in deep offshore statlons macrofauna is largely shaped by iood availab~h ty and the quality of sedimenting phytoplankton blomass. |
| Databáze: | OpenAIRE |
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