NDLI: Population extinctions in the Italian diurnal lepidoptera: an analysis of possible causes

Content Provider	Springer Nature Link
Author	Bonelli, Simona Cerrato, Cristiana Loglisci, Nicola Balletto, Emilio
Copyright Year	2011
Abstract	In depth studies of patterns of extinction are fundamental to understand species vulnerability, in particular when population extinctions are not driven by habitat loss, but related to subtle changes in habitat quality and are due to ‘unknown causes’. We used a dataset containing over 160,000 non-duplicate individual records of occurrence (referred to 280 butterflies and 43 zygenid moths), and their relative extinction data, to carry out a twofold analysis. We identified ecological preferences that influence extinction probability, and we analysed if all species were equally vulnerable to the same factors. Our analyses revealed that extinctions were non-randomly distributed in space and time, as well as across species. Most of the extinctions were recorded in 1901–1950 and, as expected, populations at their range edges were more prone to become extinct for non-habitat-related causes. Ecological traits were not only unequally distributed between extinction and non-extinction events, but also not all ecological features had the same importance in driving population vulnerability. Hygrophilous and nemoral species were the most likely to experience population losses and the most prone to disappear even when their habitat remained apparently unchanged. Species vulnerability depends on both ecological requirements and threat type: in fact, each species showed a distinct pattern of vulnerability, depending on threats. We concluded that the analysis may be an important step to prevent butterfly declines: species that are strongly suffering due to ‘unknown changes’ are in clear and urgent need of more detailed auto-ecological studies.
Starting Page	879
Ending Page	890
Page Count	12
File Format	PDF
ISSN	1366638X
Journal	Journal of Insect Conservation
Volume Number	15
Issue Number	6
e-ISSN	15729753
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-02-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Butterflies Zygenids Extinctions Global change Habitat loss Entomology Animal Ecology Life Sciences Biodiversity Conservation Biology/Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Animal Science and Zoology Nature and Landscape Conservation Insect Science

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