An integrative index of Ecosystem Services provision based on remotely sensed data
We present an approach to generate estimates and to map Ecosystem Services [ES] related to C and waterdynamics [Soil Carbon sequestration, evapotranspiration and groundwater recharge] and biodiversity [Avian Richness] from remotely sensed data in two ecoregions of South America: the Semiarid Chacowoodlands and the Rio de la Plata grasslands. Two attributes of the seasonal dynamics of the NormalizedDifference Vegetation Index [NDVI]; the annual mean [NDVImean], an indicator of light interception andhence of total C gains and the intra-annual Coefficient of Variation of the NDVI [NDVICV], a descriptorof seasonality; were combined into an ES provision index [ESPI igual a NDVImean [1-NDVICV]]. The proportionof the variance in ES provision explained by the ESPI varied from 0.484 for avian richness up to 0.662for C sequestration. A relatively large proportion of the studied area presented changes in ES provision.A 32,4 por ciento of the Semiarid Chaco and the Rio de la Plata grasslands presented significant [p menor a 0.01] trends. Most of the trends [30.2 por ciento] were negative, showing a decrease in ESPI. An index like the one proposedhere can be used as an aggregated indicator of the status and/or trends of ES supply at large spatial scales [subcontinental in our case].
| Main Authors: | , , , , , |
|---|---|
| Format: | Texto biblioteca |
| Language: | eng |
| Subjects: | MODIS, CHACO PAMPEAN PLAINS, SOUTH AMERICA, C GAINS, WATER LOSSES, BIODIVERSITY, |
| Online Access: | http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=47260 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|