期刊
ECOLOGICAL INDICATORS
卷 71, 期 -, 页码 145-154出版社
ELSEVIER
DOI: 10.1016/j.ecolind.2016.06.054
关键词
MODIS; Chaco-pampean plains; South America; C gains; Water losses; Biodiversity
资金
- Consejo Nacional de InvestigacionesCientificas y Tecnicas (Argentina)
- Universidad de Buenos Aires (Argentina)
- Fondo para la Investigacion Cientifica y Tecnologica (Argentina)
- Inter-American Institute for Global Change Research (IAI) - US National Science Foundation [CRN III 3095, GEO-1128040]
- Directorate For Geosciences
- ICER [1128040] Funding Source: National Science Foundation
We present an approach to generate estimates and to map Ecosystem Services (ES) related to C and water dynamics (Soil Carbon sequestration, evapotranspiration and groundwater recharge) and biodiversity (Avian Richness) from remotely sensed data in two ecoregions of South America: the Semiarid Chaco woodlands and the Rio de la Plata grasslands. Two attributes of the seasonal dynamics of the Normalized Difference Vegetation Index (NDVI); the annual mean (NDVI mean), an indicator of light interception and hence of total C gains and the intra-annual Coefficient of Variation of the NDVI (NDVI (CV)), a descriptor of seasonality; were combined into an ES provision index (ESPI = NDVImean * (1-NDVICV)). The proportion of the variance in ES provision explained by the ESPI varied from 0.484 for avian richness up to 0.662 for C sequestration. A relatively large proportion of the studied area presented changes in ES provision. A 32,4% of the Semiarid Chaco and the Rio de la Plata grasslands presented significant (p <0.01) trends. Most of the trends (30.2%) were negative, showing a decrease in ESPI. An index like the one proposed here can be used as an aggregated indicator of the status and/or trends of ES supply at large spatial scales (subcontinental in our case). (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据