Alterations of the global water cycle and their effects on river structure, function and services

Sabater, S. (2008) Alterations of the global water cycle and their effects on river structure, function and services. Freshwater Reviews, 1(1), pp. 75-88. 10.1608/FRJ-1.1.5

[img]
Preview
PDF (The document's language is English .) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (6Mb) | Preview
Official URL: https://www.fba.org.uk/journals/index.php/FRJ/arti...

Abstract

River structure and functioning are governed naturally by geography and climate but are vulnerable to natural and human-related disturbances, ranging from channel engineering to pollution and biological invasions. Biological communities in river ecosystems are able to respond to disturbances faster than those in most other aquatic systems. However, some extremely strong or lasting disturbances constrain the responses of river organisms and jeopardise their extraordinary resilience. Among these, the artificial alteration of river drainage structure and the intense use of water resources by humans may irreversibly influence these systems. The increased canalisation and damming of river courses interferes with sediment transport, alters biogeochemical cycles and leads to a decrease in biodiversity, both at local and global scales. Furthermore, water abstraction can especially affect the functioning of arid and semi-arid rivers. In particular, interception and assimilation of inorganic nutrients can be detrimental under hydrologically abnormal conditions. Among other effects, abstraction and increased nutrient loading might cause a shift from heterotrophy to autotrophy, through direct effects on primary producers and indirect effects through food webs, even in low-light river systems. The simultaneous desires to conserve and to provide ecosystem services present several challenges, both in research and management.

Item Type: Article
Title: Alterations of the global water cycle and their effects on river structure, function and services
Personal Creator/Author:
CreatorsEmail
Sabater, S.
Refereed: Yes
Journal or Publication Title: Freshwater Reviews
Volume: 1
Number: 1
Page Range: pp. 75-88
Date: 2008
ISSN: 1755-084X
Issuing Agency: Freshwater Biological Association
Uncontrolled Keywords: Biogeochemical cycle; Canals; Conservation; Ecosystem disturbance; Man-induced effects; Nutrients (mineral); Rivers; Sediment transport; Species diversity
Subjects: Atmospheric Sciences
Earth Sciences
Environment
Item ID: 5335
Depositing User: Mrs Christine Davey
Date Deposited: 12 May 2011 12:07
Last Modified: 29 Sep 2011 15:04
Related URLs:
URI: http://aquaticcommons.org/id/eprint/5335

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...