期刊
REMOTE SENSING
卷 5, 期 1, 页码 127-154出版社
MDPI
DOI: 10.3390/rs5010127
关键词
ecosystem functional diversity; ecosystem functional types; ecosystem functioning; environmental controls; human controls; MODIS EVI; richness; South America
类别
资金
- Inter-American Institute for Global Change Research under the US NSF Grant [CRN II 2031 2094, GEO-0452325]
- postdoctoral program of the Spanish Ministry of Education
- FEDER Funds
- Junta de Andalucia (Project GLOCHARID)
- Junta de Andalucia (Project SEGALERT) [P09-RNM-5048]
- Ministerio de Ciencia e Innovacion [CGL2010-22314]
- Fundacion MAPFRE R+D project
- Ecologia de Zonas Aridas Research Group
- University of Almeria
- CONICET
- FONCYT
- SNAP (Direccion Nacional de Medio Ambiente, Uruguay)
The regional controls of biodiversity patterns have been traditionally evaluated using structural and compositional components at the species level, but evaluation of the functional component at the ecosystem level is still scarce. During the last decades, the role of ecosystem functioning in management and conservation has increased. Our aim was to use satellite-derived Ecosystem Functional Types (EFTs, patches of the land-surface with similar carbon gain dynamics) to characterize the regional patterns of ecosystem functional diversity and to evaluate the environmental and human controls that determine EFT richness across natural and human-modified systems in temperate South America. The EFT identification was based on three descriptors of carbon gain dynamics derived from seasonal curves of the MODIS Enhanced Vegetation Index (EVI): annual mean (surrogate of primary production), seasonal coefficient of variation (indicator of seasonality) and date of maximum EVI (descriptor of phenology). As observed for species richness in the southern hemisphere, water availability, not energy, emerged as the main climatic driver of EFT richness in natural areas of temperate South America. In anthropogenic areas, the role of both water and energy decreased and increasing human intervention increased richness at low levels of human influence, but decreased richness at high levels of human influence.
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