| Effect of climate on the trophic structure of temperate forested streams. a comparison of Mediterranean and Atlantic streams. | |
| | |
MedLine Citation:
|
PMID: 18048084 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Climate affects many aspects of stream ecosystems, although the presence of riparian forests can buffer differences between streams in different climatic settings. In an attempt to measure the importance of climate, we compared the seasonal patterns of hydrology, input and storage of allochthonous organic matter, and the trophic structure (abundance of algae and macroinvertebrates) in two temperate forested streams, one Mediterranean, the other Atlantic. Hydrology played a leading role in shaping the trophic structure of both streams. Frequency and timing of floods and droughts determined benthic detritus storage. Inputs and retention of allochthonous organic matter were higher in the Atlantic stream, whereas chlorophyll concentration was lower because of stronger light limitation. Instead, light availability and scour of particulate organic matter during late winter favoured higher chlorophyll concentration in the Mediterranean stream. As a result, in the Mediterranean stream grazers were more prevalent and consumers showed a higher dependence on autotrophic materials. On the other hand, the Atlantic stream depended on allochthonous materials throughout the whole study period. The overall trophic structure showed much stronger seasonality in the Mediterranean than in the Atlantic stream, this being the most distinctive difference between these two types of temperate streams. The different patterns observed in the two streams are an indication that climatic differences should be incorporated in proper measurements of ecosystem health. |
| | |
Authors:
|
Sergi Sabater; Arturo Elosegi; Vicenç Acuña; Ana Basaguren; Isabel Muñoz; Jesús Pozo |
Related Documents
:
|
3321484 - Victims of snakebite. a 5-year study at shongwe hospital, kangwane, 1978-1982. 14965784 - Absence of effects from immunocontraception on seasonal birth patterns and foal surviva... 15683864 - Yessotoxins in norwegian blue mussels (mytilus edulis): uptake from protoceratium retic... 12014574 - Annual changes in fecal estradiol-17beta concentrations of the sun bear (helarctos mala... 641274 - Influence of a nutrition education program (efnep) on infant nutrition in east harlem. 12892154 - Compliance of present recommendations of fatty acids in formulas for term infants with ... |
Publication Detail:
|
Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't Date: 2007-12-03 |
Journal Detail:
|
Title: The Science of the total environment Volume: 390 ISSN: 0048-9697 ISO Abbreviation: Sci. Total Environ. Publication Date: 2008 Feb |
Date Detail:
|
Created Date: 2007-12-21 Completed Date: 2008-04-08 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0330500 Medline TA: Sci Total Environ Country: Netherlands |
Other Details:
|
Languages: eng Pagination: 475-84 Citation Subset: IM |
Affiliation:
|
Institute of Aquatic Ecology and Department of Environmental Sciences, University of Girona, Girona 17071, Spain. sergi.sabater@udg.es |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Atlantic Ocean Biomass* Chlorophyll / analysis Climate Invertebrates / growth & development Mediterranean Sea Principal Component Analysis Rivers* Spain Trees* |
| Chemical | |
Reg. No./Substance:
|
1406-65-1/Chlorophyll; 479-61-8/chlorophyll a |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: An innovative land use regression model incorporating meteorology for exposure analysis.
Next Document: Differential associations between lipid-lowering drugs, statins and fibrates, and venous thromboembo...