Response of epilithic microphytobenthos of the Western Baltic Sea to in situ experiments with nutrient enrichment

Hillebrand, Helmut and Sommer, Ulrich (1997) Response of epilithic microphytobenthos of the Western Baltic Sea to in situ experiments with nutrient enrichment Marine Ecology Progress Series, 160 . pp. 35-46. DOI 10.3354/meps160035.

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Abstract

The response of epilithic microphytobenthos to in situ nutrient enrichments was studied in the Kiel Fjord, Western Baltic Sea. For this purpose an experimental setup with continuous nutrient supply was designed and installed. Experiments followed the colonization of artificial substrates and the responses of benthic algae to different concentrations and combinations of nitrogen and phosphate. They revealed nitrogen limitation of epilithic microflora from late spring to autumn, such that there was higher biovolume with increasing nitrogen concentrations. Diatoms became dominant in all experiments except one in which the rhodophyte Ceramium strictum prevailed. Species composition was altered by nutrient treatments; one to several species were highly favoured by nutrient enrichment. Consequently, diversity was negatively correlated with final yield. These findings support the hypothesis that competition is an important factor structuring microphytobenthic communities.

Document Type: Article
Keywords: Food Webs; Competition · Nitrogen · Phosphate · Microphytobenthos · Diatoms · Filamentous algae · Periphyton · Kiel Fjord
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
Refereed: Yes
DOI etc.: 10.3354/meps160035
ISSN: 0171-8630
Date Deposited: 27 Mar 2012 08:10
Last Modified: 06 Jul 2012 14:52
URI: http://eprints.uni-kiel.de/id/eprint/14113

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