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Stream nutrient uptake, forest succession, and biogeochemical theory

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dc.contributorVirginia Techen
dc.contributor.authorValett, H. M.en
dc.contributor.authorCrenshaw, C. L.en
dc.contributor.authorWagner, P. F.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.issued2002-10en
dc.description.abstractTheories of forest succession predict a close relationship between net biomass increment and catchment nutrient retention. Retention, therefore, is expected to be greatest during aggrading phases of forest succession. In general, studies of this type have compared watershed retention efficiency by monitoring stream nutrient export at the base of the catchment. As such, streams are viewed only as transport systems. Contrary to this view, the nutrient spiraling concept emphasizes transformation and retention of nutrients within stream ecosystems. In this paper, we address how biogeochemical theory developed for forests may apply to lotic ecosystems in the context of catchment-level succession. Using measures of nutrient spiraling to document uptake, we focus on later seral stages by comparing streams draining second-growth (i.e., 75-100-yr stands) and old-growth (i.e., >400 yr) forests of the southern Appalachian Mountains, USA. Standing stocks of large woody debris (LWD) in old-growth streams were orders of magnitude greater than in second-growth streams where logging practices removed LWD from stream channels. Debris dams were also more frequent in old-growth streams. Solute injections were used to quantify retention of dissolved inorganic phosphate (PO4-P), the limiting nutrient in Appalachian streams. Uptake velocities in old-growth streams were significantly greater than in second-growth streams and were closely related to debris dam frequency, LWD volume, and the proportion of fine-grained (<2 mm) sediments present in the stream bed. These data suggest that streams of old-growth forests have greater demand for PO4-P compared to streams draining aggrading second-growth catchments. Finally, we present a schematic model of forest succession, aquatic-terrestrial interaction, and biogeochernical functioning in stream ecosystems emphasizing that the successional time course of retention in lotic ecosystems may be very different than that predicted for forests.en
dc.description.sponsorshipNational Science Foundation's Ecosystem Studies Program DEB 98-15868, LTER Grant No. DEB 96-32854en
dc.identifier.citationH. Maurice Valett, Chelsea L. Crenshaw, and Paul F. Wagner 2002. STREAM NUTRIENT UPTAKE, FOREST SUCCESSION, AND BIOGEOCHEMICAL THEORY. Ecology 83:2888-2901. http://dx.doi.org/10.1890/0012-9658(2002)083[2888:SNUFSA]2.0.CO;2en
dc.identifier.doihttps://doi.org/10.2307/3072024en
dc.identifier.issn0012-9658en
dc.identifier.urihttp://hdl.handle.net/10919/46838en
dc.identifier.urlhttp://www.esajournals.org/doi/pdf/10.1890/0012-9658%282002%29083%5B2888%3ASNUFSA%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.subjectappalachian mountains, usaen
dc.subjectaquatic-terrestrial interactionen
dc.subjectforesten
dc.subjectsuccessionen
dc.subjectlarge woody debrisen
dc.subjectnutrient retentionen
dc.subjectnutrient uptakeen
dc.subjectold-growth and second-growth foresten
dc.subjectstreams, uptake lengthsen
dc.subjectgreat-smoky-mountainsen
dc.subjectsonoran desert streamen
dc.subjectlarge woody debrisen
dc.subjectheadwater streamsen
dc.subjectold-growthen
dc.subjectclear-cuten
dc.subjectmediterranean streamen
dc.subjectecosystem successionen
dc.subjecttransient storageen
dc.subjectphosphorus uptakeen
dc.titleStream nutrient uptake, forest succession, and biogeochemical theoryen
dc.title.serialEcologyen
dc.typeArticle - Refereeden

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