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http://hdl.handle.net/10773/11107
Title: | Impact of sampling depth and plant species on local environmental conditions, microbiological parameters and bacterial composition in a mercury contaminated salt marsh |
Author: | Cleary, D. F. R. Oliveira, V. Gomes, N. C. M. Pereira, A. Henriques, I. Marques, B. Almeida, A. Cunha, A. Correia, A. Lillebo, A. I. |
Keywords: | Hg Juncus maritimus Portugal Rhizosphere Ria de Aveiro Bolboschoenus maritimus |
Issue Date: | 2012 |
Publisher: | Elsevier |
Abstract: | We compare the environmental characteristics and bacterial communities associated with two rushes, Juncus maritimus and Bolboschoenus maritimus , and adjacent unvegetated habitat in a salt marsh subjected to historical mercury pollution. Mercury content was higher in vegetated than unvegetated habitat and increased with sampling depth. There was also a significant relationship between mercury concentration and bacterial composition. Habitat (Juncus, Bolboschoenus or unvegetated), sample depth, and the interaction between both, however, explained most of the variation in composition (~70%). Variation in composition with depth was most prominent for the unvegetated habitat, followed by Juncus , but more constrained for Bolboschoenus habitat. This constraint may be indicative of a strong plant–microbe eco- physiological adaptation. Vegetated habitat contained distinct bacterial communities associated with higher potential activity of aminopeptidase, b -glucosidase and arylsulphatase and incorporation rates of 14C-glucose and 14C-acetate. Communities in unvegetated habitat were, in contrast, associated with both higher pH and proportion of sulphate reducing bacteria. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/11107 |
DOI: | 10.1016/j.marpolbul.2011.11.020 |
ISSN: | 0025-326X |
Appears in Collections: | CESAM - Artigos DBio - Artigos Ria de Aveiro - Artigos |
Files in This Item:
File | Description | Size | Format | |
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30_Impact of sampling depth and plant species.pdf | 624.7 kB | Adobe PDF |
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