Energy Basis for Man and Nature by Howard T. Odum PDF

By Howard T. Odum

ISBN-10: 007047527X

ISBN-13: 9780070475274

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2008). e. the rate of biodiversity loss is increasing). e. the rate of biodiversity loss is decreasing), and a horizontal line means that the expected rate of species extinctions is remaining the same, although in both cases it does not mean that biodiversity loss has stopped. Global Red List and RLI results On the global IUCN Red List, 55,926 species have been assessed (IUCN, 2010). , 2010). , 2009). However, the proportion of Data Deficient (DD) species can have some influence on these conclusions.

This will no doubt speed up the process of participants arriving at complete and consolidated datasheets for all species and allow any workshop time to focus only on the Red Listing process. The online system will also facilitate periodic reviews of various species using the expertise and input of experts at intervals between workshops and will facilitate transparency and consensus building in the review and listing process. Critique of strengths and weaknesses Strengths The IUCN Red List has a reputation as an objective and widely applicable method of assessing the relative risk of extinction of species, and is certainly the most high profile and widely used.

Data from Baillie et al. 2010; Hoffmann et al. 2010; IUCN 2010. 1) shows that the proportion of warm-water coral, bird, mammal, and amphibian species expected to survive into the near future without additional conservation actions has declined over time. , 2004). 0 indicates that all species in a group are classified as Least Concern. At the other extreme, a value of 0 indicates that all species in a group have gone extinct. The RLI can be disaggregated for subsets of data to evaluate sub-global trends in extinction risk at several different scales.

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Energy Basis for Man and Nature by Howard T. Odum

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