Organic matter availability structures microbial biomass and activity in a Mediterranean stream
dc.contributor.author
dc.date.accessioned
2016-09-19T11:52:46Z
dc.date.available
2016-09-19T11:52:46Z
dc.date.issued
2009-10-01
dc.identifier.issn
0046-5070
dc.identifier.uri
dc.description.abstract
1. We compared microbial biomass (bacteria, fungi, algae) and the activity of extracellular enzymes used in the decomposition of organic matter (OM) among different benthic substrata (leaves, coarse and fine substrata) over one hydrological year in a Mediterranean stream. 2. Microbial heterotrophic biomass (bacteria plus fungi) was generally higher than autotrophic biomass (algae), except during short periods of high light availability in the spring and winter. During these periods, sources of OM shifted towards autochthonous sources derived mainly from algae, which was demonstrated by high algal biomass and peptidase activity in benthic communities. 3. Heterotrophic activity peaked in the autumn. Bacterial and fungal biomass increased with the decomposition of cellulose and hemicellulose compounds from leaf material. Later, lignin decomposition was stimulated in fine (sand, gravel) and coarse (rocks, boulders and cobbles) substrata by the accumulation of fine detritus. 4. The Mediterranean summer drought provoked an earlier leaf fall. The resumption of the water flow caused the weathering of riparian soils and subsequently a large increase in dissolved organic carbon and nitrate, which led to growth of bacteria and fungi
dc.description.sponsorship
This study was funded by the projects CGL2005-06739-C02-01 ⁄02 of the Spanish Science Ministry. Additional funding was provided by the Fundación Banco Bilbao Vizcaya Argentaria (Project GLOBRIO).
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
MEC/PN 2005-2008/CGL2005-06739-C02-02
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Reproducció digital del document publicat a: http://dx.doi.org/10.1111/j.1365-2427.2008.02140.x
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© Freshwater Biology, 2009, vol. 54, núm. 10, p. 2025-2036
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Articles publicats (D-CCAA)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Organic matter availability structures microbial biomass and activity in a Mediterranean stream
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
014313
dc.contributor.funder
dc.identifier.eissn
1365-2427