Conservation Ecology: Area Trumps Mobility in Fragment Bird Extinctions
نویسنده
چکیده
Tropical forest understory birds are highly sensitive to habitat fragmentation. Recent results from a monumental Amazonian fragmentation experiment show that habitat needs of these specialized birds make mobility a liability, leading to their extinctions from forest fragments.
منابع مشابه
Testing hypotheses of bird extinctions at Rio Palenque, Ecuador, with informal species lists.
Informally gathered species lists are a potential source of data for conservation biology, but most remain unused because of questions of reliability and statistical issues. We applied two alternative analytical methods (contingency tests and occupancy modeling) to a 35-year data set (1973-2007) to test hypotheses about local bird extinction. We compiled data from bird lists collected by expert...
متن کاملTheory meets reality in fragmented forests
For those of us who study fragmented ecosystems, island biogeographic theory (MacArthur & Wilson, 1967) is still in many ways the conceptual Mecca towards which we face when thinking about imperiled biodiversity. The theory posits that species richness results from a dynamic equilibrium between the opposing forces of colonization and extinction, which are governed respectively by island isolati...
متن کاملTwenty years of understorey bird extinctions from Amazonian rain forest fragments: consistent trends and landscape-mediated dynamics
Aim We analysed presence/absence data for understorey bird species in rain forest fragments sampled from 1979 through 2001. Here we consider extinctions between 1992, when most fragments had been isolated for at least 8 years, and 2001. Our objectives were to determine whether high extinction rates documented soon after isolation continued through up to 20 years after isolation, and to examine ...
متن کاملتأثیر اندازه و شکل لکه‌های درخت‌زار بر غنا و تنوع گونه‌ای پرندگان در منطقه حفاظت شده کرکس
Determining landscape parameters influencing species richness of habitat patches is one of the most important issues in conservation biology. Many previous studies have investigated the influence of habitat parameters on bird assemblages in forest patches, but studies seeking effects of oasis parameters on bird assemblages are very scarce. Karkas Protected Area is located in semi-arid zone in...
متن کاملThe Comparison of Effect of Conservation on Biodiversity and Density Indeces of Wintery Waterfowl and Wader Birds in Maroon Dam in Protected Area and Jaizan Dam
This study was performed in second half of year 2009.For bird counting , monthly from Septamber until March 2009. Total counted birds in Maroon lake were (971). Maximum number of counted birds was in February (191) and minimum of counted was in Septamber (95). Total counted birds in Jaizan were (385. Maximum number of the counted bird was in February (84) and minimum of counted (52) was in Ja...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Current Biology
دوره 17 شماره
صفحات -
تاریخ انتشار 2007