Elsevier

Pedosphere

Volume 18, Issue 1, February 2008, Pages 11-23
Pedosphere

Measuring the Condition of Saline Wetlands Threatened by Agricultural Intensification

https://doi.org/10.1016/S1002-0160(07)60098-8Get rights and content

Abstract

The saline wetlands, or "saladas", of Monegros Desert, NE Spain, contain biodiversity that depends on the establishment of a prognostic monitoring system that can warn of approaching irreversible damage. In the context of a lack of existing biodiversity inventories for the saladas, we determined their state of conservation and vulnerability using seven physical indicators: escarpment continuity, cropping, stone dumping, size, water occurrence, distance to roads, and proximity to irrigated areas. These features were combined into three meaningful indexes, i.e., conservation, current vulnerability, and future vulnerability, thus creating an assessment of the preservation or degradation of saladas in the context of encroaching agricultural irrigation projects. The proposed indexes produced consistent results and showed that a great number of the Monegros wetlands were threatened, regardless of their size or frequency of water occurrence. Only 20% of the saladas studied were classified as being in a good or very good conservation, whereas 50% were in bad or very bad shape. A high current vulnerability was found for 60% of the saladas. For saladas located in land to be irrigated, we predicted that 73% would have a high or very high future vulnerability. Currently, 58% of the saladas were in bad or very bad condition and fully 65% of the saladas, variable in size, presented a bad or very bad prognosis. Our approach provides a monitoring strategy for the conservation of saline wetlands threatened by agricultural intensification, especially irrigation.

References (47)

  • J. Herrero et al.

    Aridity and irrigation in Arag¶on, Spain

    J. Arid Environ.

    (1997)
  • S. Lang et al.

    Multiscale GIS tools for site management

    Journal for Nature Conservation

    (2005)
  • T. Langanke et al.

    Selection and application of spatial indicators for nature conservation at difierent institutional levels

    Journal for Nature Conservation

    (2005)
  • P.M. Mayer et al.

    Plankton respiration and biomass as functional indicators of recovery in restored prairie wetlands

    Ecological Indicators

    (2004)
  • F. Müller et al.

    Ecosystem based indicators in retrogressive successions of an agricultural landscape

    Ecological Indicators

    (2006)
  • V. Rivas et al.

    Geomorphological indicators for environmental impact assessment: consumable and non-consumable geomorphological resources

    Geomorphology

    (1997)
  • R.W. Tiner

    Remotely-sensed indicators for monitoring the general condition of “natural habitat” in watersheds: an application for Delaware's Nanticoke River watershed

    Ecological Indicators

    (2004)
  • S.C. Adamowicz et al.

    New England salt marsh pools: a quantitative analysis of geomorphic and geographic features

    Wetlands

    (2005)
  • J. Belnap et al.

    Patton's tracks in the Mojave desert, USA: an ecological legacy

    Arid Land Res. Manage

    (2002)
  • A. Berga

    Climate-water-soil-subsoil relations in Monegros II (in Spanish). Ph.D. Thesis

    (1993)
  • C. Castañeda
  • A. Cendrero et al.

    Indicators and indices of environmental quality for sustainability assessment in coastal areas

    J. Coastal Res.

    (2003)
  • F. Comín et al.

    Limnology of the small lakes of Monegros II

  • Cited by (0)

    Project supported by the Ministry of Education and Science, Spain (No. AGL2006-01283) and the European Regional Development Fund (No. EX2006-0347).

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