English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/37429
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Influence of Land Use on Stream Ecosystem Function in a Mediterranean Catchment

AuthorsVon Schiller, D. ; Martí, Eugènia ; Riera, Joan L.; Ribot, Miquel ; Marks, J. C.
KeywordsLand use
Nutrient retention
Issue Date10-Jul-2008
PublisherJohn Wiley & Sons
CitationFreshwater Biology 53(12) : 2600-2612 (2008)
Abstract1. Due to the hierarchical organization of stream networks, land use changes occurring at larger spatial scales (i.e. the catchment) can affect physical, chemical and biological characteristics at lower spatial scales, ultimately altering stream structure and function. Anthropogenic effects on streams have primarily been documented using structural metrics such as water chemistry, channel alteration and algal biomass. Functional parameters, including metrics of nutrient retention and metabolism, are now being widely used as indicators of stream condition. 2. Within this hierarchical context, we used a multivariate approach to examine how structural and functional (i.e. nutrient retention and metabolism) attributes of streams are related to catchment variables, including land use. The study was done in 13 streams located within a single Mediterranean catchment, but draining sub-catchments with contrasting land use. 3. At the catchment scale, results showed two contrasting land use gradients: (i) from forested- to urban-dominated catchments and (ii) from low to moderate agricultural-dominated catchments. Variation in structural and functional parameters was strongly related to these land use gradients. Specifically, NH4+ demand (measured as the uptake velocity, Vf) decreased along the gradient from forested- to urban-dominated catchments primarily in response to increases in stream nutrient concentrations [NH4+, dissolved organic nitrogen (DON) and carbon (DOC)]. Both primary production and respiration increased along the gradient of agricultural development in response to increases in algal biomass (chlorophyll a). Soluble reactive phosphorus demand was not related to any of the land use gradients. 4. Our results illustrate the connections among factors operating at different spatial scales (i.e. from catchments to streams) and their distinct influence on stream ecosystem function. Managers should take into consideration these connections when designing stream management and restoration plans. Because ecologically successful stream management and restoration is expected to restore function as well as structure to streams, the use of appropriate measures of functional processes is required. Nutrient retention and metabolism parameters are good candidates to fill this gap.
Description13 Páginas ; 3 Figuras ; 3 Tablas
Publisher version (URL)http://dx.doi.org/10.1111/j.1365-2427.2008.02059.x
Appears in Collections:(CEAB) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.