By David L. Hawksworth, Alan T. Bull

This booklet brings jointly a variety of unique reports submitted to Biodiversity and Conservation that handle biodiversity and conservation in Europe. Europe is definitely the main intensively inventoried area of the area; certain maps can be found for species distributions whereas motion plans are being drawn up for species below possibility. while, the natural world of Europe has been topic to huge, immense human pressures, with constrained desolate tract websites final in such a lot international locations. Europe accordingly provides a case-study of what the human effect on biodiversity has been, and likewise what could be performed to enhance the location. The contributions during this quantity are drawn from quite a lot of international locations and speak about varied organism and habitat forms. They jointly offer a snap-shot of the kinds of reviews and activities being taken in Europe to deal with matters in biodiversity and conservation topical examples that might make the quantity in particular invaluable to be used in conservation biology classes.

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Sample text

The highest mean concordance (around 69%) was between the Combined Index hotspots map and the others. 7%). 0%). The 92 grid cells that were selected under all the criteria (high concordance cells) showed complete geographical concordance. 05). SR, species richness; RSR, rare species richness; RDB 2004, status sensu Spanish Red Data Book (Madroño et al. 2004); EU-threat 2004 and SPEC, status sensu BirdLife International 2004) 1C [22] Biodivers Conserv (2007) 16:3255–3275 3265 by the simple rank-scoring methodology.

It is also possible that within Spain priority in SPA designation has been given to other bird groups, such as forest communities, for which the eVectiveness of protection has been shown to be appreciably superior (Ramírez 2004). In any event, it must be borne in mind that just because a grid cell does not form part of the top 5% does not mean that it lacks conservation value. Finally, the current analysis is extremely conservative, given that the presence of a species in a grid cell overlapped by an SPA does not necessarily mean that the species was present within the SPA itself.

The non-zero constant r is the common ratio of the geometric series. Indeed, it is the ratio between one term and the preceding one. Thus, if species are ranked from the least abundant (i = 1) to the most abundant (i = S) and the obtained abundance distribution is governed by a geometric series, the ratio between the abundance of one species and the preceding one is constant. The reformulation by Caruso and Migliorini (2006b) outlines the relationships between the geometric constant r and the ratio K of equation (2), which therefore synthesises the community SAD.

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