Adaptations of microphytobenthos assemblages to sediment type and tidal position

Tagus intertidal microphytobenthos (MPB) assemblages were characterized over a wide range of sediment type and tidal height and the possible effects of these variables on MPB spatial distribution and photo-adaptation mechanisms were investigated. Two transects with six different sediment type and di...

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Bibliographic Details
Published in:Continental shelf research 2009-06, Vol.29 (13), p.1624-1634
Main Authors: Jesus, B., Brotas, V., Ribeiro, L., Mendes, C.R., Cartaxana, P., Paterson, D.M.
Format: Article
Language:English
Subjects:
Bacillariophyceae
Cyanobacteria
Marine
Microphytobenthos
Migrations
PAM fluorescence
Photosynthetic pigments
Portugal
Sediment distribution
Spatial variations
Tagus estuary
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Summary:Tagus intertidal microphytobenthos (MPB) assemblages were characterized over a wide range of sediment type and tidal height and the possible effects of these variables on MPB spatial distribution and photo-adaptation mechanisms were investigated. Two transects with six different sediment type and different tidal height sites were sampled once every two months from 2002 to 2004. Upper shore and sandy sites showed higher chlorophyll a (chl a) content, with sandy sediments showing a biomass peak in late winter–early spring, and muddy sites showing no obvious seasonal pattern. Stepwise multiple linear regressions showed that only SiO 2, tidal height and sediment particle size
ISSN:0278-4343
1873-6955
DOI:10.1016/j.csr.2009.05.006