By Tim M. Blackburn
Organic invaders signify one of many fundamental threats to the upkeep of world biodiversity, human well-being, and the luck of human monetary companies. the continued globalization of our society guarantees that the necessity to comprehend the method of organic invasion will basically elevate sooner or later. there's additionally a starting to be popularity that the examine of organic invaders offers a distinct perception into uncomplicated questions in ecology and evolution.
The research of unique birds has had a very lengthy historical past and has come to symbolize a desirable intersection among the examine of organic invasions, avian conservation biology, and uncomplicated ideas of ecology and evolution. Avian Invasions summarizes and synthesizes this targeted old checklist and unravels the insights that the research of unique birds brings to all 3 of those learn strands. It comprises chapters at the famous contributions of unique chook research to ecological technology, and at the post-establishment evolution of brought chook populations. the result's the main accomplished photograph but of the invasion process.
Avian Invasions is geared toward expert avian biologists and ornithologists in addition to graduate scholars of avian ecology, evolution and conservation. It additionally appeals to a extra normal viewers of invasion ecologists.
Read or Download Avian Invasions: The Ecology and Evolution of Exotic Birds (Oxford Avian Biology) PDF
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Extra resources for Avian Invasions: The Ecology and Evolution of Exotic Birds (Oxford Avian Biology)
For example, species introduced as game birds will tend to be ‘larger and tastier’ than the average species, and will tend to have behavioural characteristics that make them interesting ‘sport’. Ornamental and escaped cage bird species will tend to have showy plumage or musical songs, as these characteristics are likely to enrich the environment of their human owners. Ornamental species may also tend to be large, as the point of that bright plumage is lost if the bird is not obvious to the observer.
This number is likely to be a slight underestimate, as it is often not clear from which region the introduced individuals of widespread species 36 Transport and Introduction were collected. Just considering bird introductions to New Zealand, one-quarter (30/120) of the species derived from other locations in the Australasian region. However, more than one-third (41/120) of the species introduced came from the Palaearctic, the original home for a high proportion of the human settlers (Duncan, et al.
2005). 17 million km2, and thus substantially greater than the mean for all bird species of 583,000 km2. The signiﬁcance of this diﬀerence can be assessed by permutation test, selecting 425 species at random from the global avifauna, calculating the geometric mean range size of this sample, and repeating 1,000 times to produce a distribution of expected outcomes. Ninety-nine per cent of the 1,000 sample means calculated using this approach fall in the range 430,195–759,327 square kilometres, and thus are nowhere near encompassing the observed mean range size of introduced bird species.