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United States Department of Agriculture (USDA) 2013

SOIL CONTROLS ON SEMIARID ECOSYSTEM PRODUCTIVITY ACROSS SPACE AND TIME

Soil Semi-Arid

United States Department of Agriculture (USDA) Research, Education & Economics Information System (REEIS)

Titre : SOIL CONTROLS ON SEMIARID ECOSYSTEM PRODUCTIVITY ACROSS SPACE AND TIME

Identification : ARZT-1361030-H21-176

Pays : Etats Unis

Durée : Oct 1, 2013 à Sep 30, 2018

Domaine : semiarid ; digital soil mapping ; climate change ; aboveground productivity

Partenaire : UNIVERSITY OF ARIZONA 888 N EUCLID AVE TUCSON,AZ 85719-4824

Objectifs
The overall objective is to integrate digital soil mapping techniques with measures of soil physical properties, soil-water dynamics, and ecosystem production to characterize semi-arid ecosystem response to climate forcing over larges areas of southern Arizona. The overall hypothesis is that soil physical properties modulate ecosystem response to climate variability through control of soil-water dynamics and availability. Thus quantifying in detail the spatial patterns of soil physical properties such as clay or rock content provides a first order means to constrain potential ecosystem response to climate forcing. The proposed research involves two research components : Determine spatial patterns of soil physical properties important to quantifying soil-water availability using a combination of digital soil mapping, field based soil survey and characterization, and pedotransfer functions ; Characterize the temporal and spatial variation in aboveground vegetation productivity as it relates to soil physical properties using a combination of remote sensing and modeling techniques.

Présentation : USDA

Page publiée le 28 septembre 2015, mise à jour le 22 novembre 2017