منابع مشابه
The multiple scales of biodiversity
The claim that measures of global biodiversity dynamics are meaningless is based upon several methodological problems, including underrepresentation of tropical regions in ‘‘global’’ Phanerozoic data sets, inaccuracies in taxonomic data, non-equivalence of higher taxa among groups of organisms, and uneven sampling intensity across groups, environments, and time intervals. Some of these problems...
متن کاملAssessing biodiversity intactness at multiple scales
The Southern Africa Millennium Ecosystem Assessment developed an index for quantifying the state of biodiversity. The Biodiversity Intactness Index (BII) operates at the species level, and is based on changes in species abundance, rather than changes in richness brought about by extinction. The BII uses spatial data on species richness and land use activities per ecosystem type to weight estima...
متن کاملSeveral scales of biodiversity affect ecosystem multifunctionality.
Society values landscapes that reliably provide many ecosystem functions. As the study of ecosystem functioning expands to include more locations, time spans, and functions, the functional importance of individual species is becoming more apparent. However, the functional importance of individual species does not necessarily translate to the functional importance of biodiversity measured in who...
متن کاملBiodiversity and ecosystem stability across scales in metacommunities.
Although diversity-stability relationships have been extensively studied in local ecosystems, the global biodiversity crisis calls for an improved understanding of these relationships in a spatial context. Here, we use a dynamical model of competitive metacommunities to study the relationships between species diversity and ecosystem variability across scales. We derive analytic relationships un...
متن کاملBiodiversity Governance: A Tower of Babel of Scales and Cultures
The recently created Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES), originally focused on multilateral and global issues, is shifting its focus to address local issues and to include in its assessments local stakeholders and indigenous and traditional systems of knowledge. Acknowledging that full biodiversity governance is unavoidably rooted in participation of local...
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ژورنال
عنوان ژورنال: Nature
سال: 2002
ISSN: 0028-0836,1476-4687
DOI: 10.1038/419575a