DSpace

Digital.CSIC > Recursos Naturales > Centro de Estudios Avanzados de Blanes (CEAB) > (CEAB) Artículos >

Share

EndNote

Links

Closed Access item Combined effects of leaf litter inputs and a flood on nutrient retention in a Mediterranean mountain stream during fall

Authors:Argerich, A.
Martí, Eugènia
Sabater, Francesc
Ribot, Miquel
Von Schiller, D.
Riera, Joan L.
Issue Date:2008
Publisher:American Society of Limnology and Oceanography
Citation:Limnology and Oceanography 53(2) : 631-641 (2008)
Abstract:This study examined the effect of increasing in-channel leaf standing stocks on hydrologic transient storage and nutrient retention in a Mediterranean mountain stream. A flood at the end of the leaf fall period provided the opportunity to examine the effect of abrupt removal of much of the leaf material. Twenty-one chloride additions were performed from October to December 2004. In 13 of these, we also added ammonium and phosphate to estimate nutrient uptake lengths and uptake velocities to assess nutrient retention. The one-dimensional transport with inflow and storage (OTIS) model was used to estimate transient water storage parameters. Although discharge remained constant during leaf fall, water residence time increased because of in-channel litter accumulation, as did nutrient uptake velocity. Flooding reduced leaf benthic standing stocks by 65% and dramatically altered hydraulic and nutrient retention properties of the channel. After recession, the stream rapidly recovered in terms of nutrient retention, especially for phosphate. Abrupt changes in discharge under flood conditions largely determined the variability in stream nutrient retention. However, leaf litter inputs played an important role in nutrient dynamics during constant flow. Because both the flood regime and the timing of leaf fall are being regionally altered by climate change, our results have implications for stream nutrient dynamics under climate change scenarios.
Description:11 Páginas ; 6 Figuras ; 3 Tablas
Publisher version (URL):http://www.new.aslo.org/lo/pdf/vol_53/issue_2/0631.pdf
URI:http://hdl.handle.net/10261/37419
ISSN:0024-3590
Appears in Collections:(CEAB) Artículos

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.