Coccolithophore ecology in the tropical and subtropical Atlantic Ocean: New perspectives from the Atlantic Meridional Transect (AMT) programme
| Autor: | Anastasia Charalampopoulou, Tim R. Adey, PM Holligan, Alex J. Poulton |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Deep chlorophyll maximum 010504 meteorology & atmospheric sciences biology Coccolithophore Ecology 010604 marine biology & hydrobiology Geology Subtropics Aquatic Science biology.organism_classification 01 natural sciences Oceanography Abundance (ecology) Temperate climate Photic zone Species richness 0105 earth and related environmental sciences Emiliania huxleyi |
| Popis: | Coccolithophore species composition was determined in 199 samples collected from the upper 300 m of the Atlantic Ocean, spanning temperate, tropical and subtropical waters in both hemispheres during four Atlantic Meridional Transect (AMT) cruises over the period 2003 to 2005. Of the 171 taxa observed, 140 consistently represented less than 5% of total cell numbers, and were classed as rare. Multivariate statistical techniques were used on the common taxa to assess variability in community composition vertically in the water column, horizontally across hydrographic provinces (subtropical gyres, equatorial waters, temperate waters), and temporally between cruises. Sharper gradients of statistical dissimilarity in species composition occurred vertically over a few tens of metres than horizontally over hundreds of kilometres. Three floral groups were identified from analysis of the depth of normalised abundance maxima in the subtropical gyres and equatorial waters: the upper euphotic zone (UEZ, >10% surface irradiance); the lower euphotic zone (LEZ, 10-1% surface irradiance); and the sub-euphotic zone (SEZ |
| Databáze: | OpenAIRE |
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