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| Titel |
Dryland ecohydrology and climate change: critical issues and technical advances |
| VerfasserIn |
L. Wang, P. D'Odorico, J. P. Evans, D. J. Eldridge, M. F. McCabe, K. K. Caylor, E. G. King |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 16, no. 8 ; Nr. 16, no. 8 (2012-08-09), S.2585-2603 |
| Datensatznummer |
250013414
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| Publikation (Nr.) |
 copernicus.org/hess-16-2585-2012.pdf |
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| Zusammenfassung |
| Drylands cover about 40% of the terrestrial land surface and account for
approximately 40% of global net primary productivity. Water is
fundamental to the biophysical processes that sustain ecosystem function and
food production, particularly in drylands where a tight coupling exists
between ecosystem productivity, surface energy balance, biogeochemical
cycles, and water resource availability. Currently, drylands support at
least 2 billion people and comprise both natural and managed ecosystems. In
this synthesis, we identify some current critical issues in the
understanding of dryland systems and discuss how arid and semiarid
environments are responding to the changes in climate and land use. The
issues range from societal aspects such as rapid population growth, the
resulting food and water security, and development issues, to natural
aspects such as ecohydrological consequences of bush encroachment and the
causes of desertification. To improve current understanding and inform upon
the needed research efforts to address these critical issues, we identify
some recent technical advances in terms of monitoring dryland water
dynamics, water budget and vegetation water use, with a focus on the use of
stable isotopes and remote sensing. These technological advances provide new
tools that assist in addressing critical issues in dryland ecohydrology
under climate change. |
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