Transient effects of solar ultraviolet radiation on the diversity and structure of a field-grown epibenthic community at Lüderitz, Namibia.

Molis, Markus and Wahl, Martin (2004) Transient effects of solar ultraviolet radiation on the diversity and structure of a field-grown epibenthic community at Lüderitz, Namibia. Journal of Experimental Marine Biology and Ecology, 302 (1). pp. 51-62. DOI 10.1016/j.jembe.2003.10.003.

[img] Text
Mol2004a.pdf - Published Version
Restricted to Registered users only

Download (274Kb) | Contact

Supplementary data:

Abstract

While the majority of research on ultraviolet radiation (UVR) has focused on UVR-induced changes in the productivity and abundance of single taxonomic groups, only a few field studies have considered the influence of ambient UVR on complete assemblages, in particular of the macrobenthos. Using cutoff filters, we followed the effects of three radiation treatments, (1) PAR+UVAR+UVBR, (2) PAR+UVAR, (3) PAR, on macrobenthic community structure at Luderitz, Namibia, SE Atlantic, for 3 months. Species composition, biomass, evenness, and species richness were not significantly affected by UVR. while the diversity IT of PAR+UVAR+UVBR-exposed communities was significantly lower compared to PAR treatments. However, this effect was only observed early in succession. Increased abundance of the red alga Ceramium sp. coincided with vanishing UVR effects on the community, suggesting a muted UVR microclimate under the Ceramium canopy. Our results demonstrate that UVR could neither decrease diversity persistently, nor affect any of the other tested community parameters. Single UVR-tolerant species may provide protective shading for UVR-sensitive species, thus buffering harmful UVR effects at the community level. Missing UVBR effects suggest a limited influence of ozone depletion on shallow water macrobenthic diversity. (C) 2003 Elsevier B.V. All rights reserved.

Document Type: Article
Keywords: Benthic Ecology; Diversity; Macrobenthos; Namibia; Protective shading; UVR stress
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-B Experimental Ecology - Benthic Ecology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.jembe.2003.10.003
ISSN: 0022-0981
Projects: GAME
Date Deposited: 02 Mar 2009 15:43
Last Modified: 10 Jul 2017 13:17
URI: http://oceanrep.geomar.de/id/eprint/6418

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...