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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Muñiz, Selene Jimenez, Juan José Elosegi, Arturo Arroita, Maite Merchán, Daniel Navarro, Enrique Val, Jonatan Comín, Francisco A. Díez, Joserra Lorente, Carmen Causapé, Jesús Lacarta, Juan |
| Description | Author Affiliation: Arroita M ( Faculty of Science and Technology, University of the Basque Country, PO Box 644, 48080 Bilbao, Spain. Electronic address: maite.arroita@ehu.es.) |
| Abstract | Many dryland areas are being converted into intensively managed irrigation crops, what can disrupt the hydrological regime, degrade soil and water quality, enhance siltation, erosion and bank instability, and affect biological communities. Still, the impacts of irrigation schemes on the functioning of terrestrial and aquatic ecosystems are poorly understood. Here we assess the effects of irrigation agriculture on breakdown of coarse organic matter in soil and water. We measured breakdown rates of alder and holm oak leaves, and of poplar sticks in terrestrial and aquatic sites following a gradient of increasing irrigation agriculture in a semi-arid Mediterranean basin transformed into irrigation agriculture in 50% of its surface. Spatial patterns of stick breakdown paralleled those of leaf breakdown. In soil, stick breakdown rates were extremely low in non-irrigated sites (0.0001-0.0003 day(-1)), and increased with the intensity of agriculture (0.0018-0.0044 day(-1)). In water, stick breakdown rates ranged from 0.0005 to 0.001 day(-1), and increased with the area of the basin subject to irrigation agriculture. Results showed that irrigation agriculture affects functioning of both terrestrial and aquatic ecosystems, accelerating decomposition of organic matter, especially in soil. These changes can have important consequences for global carbon budgets. |
| ISSN | 03043894 |
| Volume Number | 263 Pt 1 |
| e-ISSN | 18733336 |
| Journal | Journal of Hazardous Materials |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-12-15 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Agricultural Irrigation Ecosystem Alnus Climate Fresh Water Plant Leaves Populus Quercus Soil Wood Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Pollution Waste Management and Disposal Health, Toxicology and Mutagenesis Environmental Engineering |
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