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By T. R. New

ISBN-10: 0511082061

ISBN-13: 9780511082061

ISBN-10: 0521825032

ISBN-13: 9780521825030

This ebook serves as an advent to invertebrate conservation biology for agriculturists and to crop defense for conservation biologists. Demonstrating how the 2 disparate fields may well engage for better collective profit, it attracts on contemporary literature to bare how invertebrate conservation in hugely altered landscapes might be promoted and stronger.

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Without such support, serious errors are almost inevitable, and these may have far-reaching consequences, as exemplified earlier for agricultural pests. Correct names are keys to finding information; incorrect names, conversely, lead to false or misleading information. Evaluating invertebrate biodiversity · 37 The very extent of invertebrate alpha diversity (species richness) ensures that no scientist can ‘handle’ such enormous groups as insects or spiders in their entireity, or to the equivalent extent that a single person may be able to recognise and name, for example, birds or mammals.

142); around 400 predatory species have been reported from cereals in the UK (Sunderland & Chambers, 1983), and about 600– 1000 have been reported in US cotton and soybean crops (Whitcomb & Bell, 1964; Gross, 1987). Other examples are cited by Sunderland et al. (1997), who also noted that richness of spiders and carabid beetles, as common ‘focal groups’ for enumeration, can be particularly high. Thus, more than 400 species of spiders have been estimated to occur in US cotton fields (Young & Edwards, 1990) and more than 100 species of Carabidae in other, named crops (Horne & Edward, 1997).

Robinson & Sutherland (2002) noted that whilst agricultural intensification has had a wide range of impacts on biodiversity, data on many species are insufficient to enable any detailed assessment to be made of the factors involved. Writing particularly of Britain, they commented that initially (in the 1950s and 1960s), reduction of habitat diversity was the important factor, whilst more recently, reduction in habitat quality is probably more important. Not surprisingly, declines have been most marked in habitat specialists, so that many of the species at present common on farmland are relative generalists, able to withstand considerable disturbance.

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Invertebrate Conservation and Agricultural Ecosystems by T. R. New


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