Measuring the fate of plant diversity: Towards a foundation for future monitoring and opportunities for urgent action

Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB, UK.
Philosophical Transactions of The Royal Society B Biological Sciences (Impact Factor: 7.06). 03/2005; 360(1454):359-72. DOI: 10.1098/rstb.2004.1596
Source: PubMed


Vascular plants are often considered to be among the better known large groups of organisms, but gaps in the available baseline data are extensive, and recent estimates of total known (described) seed plant species range from 200000 to 422000. Of these, global assessments of conservation status using International Union for the Conservation of Nature (IUCN) categories and criteria are available for only approximately 10000 species. In response to recommendations from the Conference of the Parties to the Convention on Biological Diversity to develop biodiversity indicators based on changes in the status of threatened species, and trends in the abundance and distribution of selected species, we examine how existing data, in combination with limited new data collection, can be used to maximum effect. We argue that future work should produce Red List Indices based on a representative subset of plant species so that the limited resources currently available are directed towards redressing taxonomic and geographical biases apparent in existing datasets. Sampling the data held in the world's major herbaria, in combination with Geographical Information Systems techniques, can produce preliminary conservation assessments and help to direct selective survey work using existing field networks to verify distributions and gather population data. Such data can also be used to backcast threats and potential distributions through time. We outline an approach that could result in: (i) preliminary assessments of the conservation status of tens of thousands of species not previously assessed, (ii) significant enhancements in the coverage and representation of plant species on the IUCN Red List, and (iii) repeat and/or retrospective assessments for a significant proportion of these. This would result in more robust Sampled Red List Indices that can be defended as more representative of plant diversity as a whole; and eventually, comprehensive assessments at species level for one or more major families of angiosperms. The combined results would allow scientifically defensible generalizations about the current status of plant diversity by 2010 as well as tentative comments on trends. Together with other efforts already underway, this approach would establish a firmer basis for ongoing monitoring of the status of plant diversity beyond 2010 and a basis for comparison with the trend data available for vertebrates.

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Available from: Thomas R Meagher, Oct 03, 2015
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    • "Leguminosae is the world's third largest angiosperm family and species in this family are important components of the Malagasy flora (Du Puy et al., 2002). Moreover, legume species are present in all major terrestrial ecosystems and as such this family is a useful proxy for evaluating global patterns of angiosperm diversity (Nic Lughadha et al., 2005). In order to conduct a comparative investigation of patterns of genetic variation at the species level, we chose two species of Delonix (Leguminosae) in Madagascar as the focal species for the present study – Delonix decaryi (R.Vig.) "
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    Global Ecology and Conservation 12/2014; 2. DOI:10.1016/j.gecco.2014.08.005
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    • "Vascular plants were used as a focal group since they are considered as suitable indicators of biodiversity and are relatively rapid to survey and identify. Also, as primary producers they play a critical role in supplying ecosystem goods and services, and are the single most important group of organisms in shaping habitats for other species (Lughadha et al., 2005; Pereira and Cooper, 2006). Field work for habitat recording and vegetation plots extended for two or three visits per site depending on the spatial heterogeneity and species diversity. "
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    • "As a result, dipterocarps are the best studied component of the flora of Borneo, and serve as an appropriate model for developing and testing rapid assessment strategies. Approximately 58 percent of all dipterocarps have been evaluated for the IUCN Red List, of which 94 percent are listed as endangered (Nic Lughadha et al. 2005), although there is uncertainty over the accuracy of these assessments (Chen 2004). In this study, we compared estimates of habitat loss based on reductions in the EOO, AOO and predicted distributions determined by ecological niche modeling for 33 dipterocarp species in Sabah. "
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