Interaction of substrate and nutrient availability on wood biofilm processes in streams

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dc.contributor.authorTank, J. L.en
dc.contributor.authorWebster, Jackson R.en
dc.contributor.departmentBiological Sciencesen
dc.date.accessed2014-03-11en
dc.date.accessioned2014-03-27T13:06:04Zen
dc.date.available2014-03-27T13:06:04Zen
dc.date.issued1998-09en
dc.description.abstractWe examined the effect of decomposing leaf litter and dissolved inorganic nutrients on the heterotrophic biofilm of submerged wood in streams with and without leaves. Leaf litter was excluded from one headwater stream in August 1993 at Coweeta Hydrologic Laboratory in the southern Appalachian Mountains. We compared microbial processes on wood in the litter-excluded stream to a reference stream using microbial respiration, fungal biomass, and extracellular enzyme activity. Exclusion of leaf litter enhanced microbial respiration and extracellular enzyme activity, and fungal biomass was seven times higher than in the reference stream. Nutrient-releasing substrates placed beneath wood veneers indicated colimitation by nitrogen and phosphorus on biofilms in the reference stream. Our conclusion is that, in the absence of nutrient immobilization by leaves, nutrients are more available for other heterotrophic processes. Nutrient limitation may have been responsible for low microbial respiration, fungal biomass, and extracellular enzyme activity on wood in the reference stream containing leaves. Our results suggest that competition for nutrients may regulate heterotrophic microbial processes in these streams.en
dc.description.sponsorshipNSF DEB-9423518en
dc.description.sponsorshipCoweeta Litter Exclusion Projecten
dc.description.sponsorshipNSF Grant DEB-9207498en
dc.identifier.citationJennifer L. Tank and J. R. Webster 1998. INTERACTION OF SUBSTRATE AND NUTRIENT AVAILABILITY ON WOOD BIOFILM PROCESSES IN STREAMS. Ecology 79:2168-2179. http://dx.doi.org/10.1890/0012-9658(1998)079[2168:IOSANA]2.0.CO;2en
dc.identifier.doihttps://doi.org/10.1890/0012-9658(1998)079[2168:iosana]2.0.co;2en
dc.identifier.issn0012-9658en
dc.identifier.urihttp://hdl.handle.net/10919/46837en
dc.identifier.urlhttp://www.esajournals.org/doi/pdf/10.1890/0012-9658%281998%29079%5B2168%3AIOSANA%5D2.0.CO%3B2en
dc.language.isoen_USen
dc.publisherEcological Society of Americaen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectdecompositionen
dc.subjectenzyme activityen
dc.subjectergosterolen
dc.subjectfungal biomassen
dc.subjectleaf litteren
dc.subjectmicrobial respirationen
dc.subjectNitrogenen
dc.subjectnutrienten
dc.subjectPhosphorusen
dc.subjectstreamen
dc.subjectWood biofilmsen
dc.subjectinvertebrate colonizationen
dc.subjectdecomposition dynamicsen
dc.subjectforesten
dc.subjectboreal riveren
dc.subjecttundra riveren
dc.subjectecosystemsen
dc.subjectperiphytonen
dc.titleInteraction of substrate and nutrient availability on wood biofilm processes in streamsen
dc.title.serialEcologyen
dc.typeArticle - Refereeden

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