نتایج جستجو برای: endemics
تعداد نتایج: 711 فیلتر نتایج به سال:
Understanding the effects of climate change on tropicalpine biota remains a scientific challenge today. The Andean páramo is largest and most diverse biogeographical region in world, also one threatened as it prone to accelerated environmental changes. My goal was predict changes distribution ranges highly endemic flora mid-term (50 years). First, I predicted plant species under novel climates ...
The geographic distribution of Astragalus L. (Fabaceae) was analyzed using a database of 12377 geo-referenced observations. In the old world (including Asia, Africa and Europe) there are ca. 2900 euploid species classified in 166 distinct sections. In this study using geographic information system (GIS) by means of DIVA-GIS (ver. 4) distribution map of some more important sections in the old wo...
Abstract In terms of plant diversity, the Mediterranean Basin is world’s second richest hotspot, and one most important locations on planet for endemic species. Despite widespread acknowledgment region’s global importance an up-to-date list endemics still unavailable. The available data are frequently insufficient or out date at both whole national levels. Therefore, present study aimed delimit...
Gene exchange between species occurs in areas of secondary contact, where two species have the opportunity to hybridize. If heterospecific males are more common than conspecific males, females will experience more encounters with males of other species. These encounters might increase the likelihood of heterospecific matings, and lead to the production of hybrid progeny. I studied the mating be...
Island endemics are typically differentiated from their mainland progenitors in behavior, morphology, and genetics, often resulting from long-term evolutionary change. To examine mechanisms for the origins of island endemism, we present a phylogeographic analysis of whole mitochondrial genomes from the endangered island fox (Urocyon littoralis), endemic to California's Channel Islands, and main...
Vassya Bankova3 *, Jordanka Koeva-Todorovskab, Tatyana Stam bolijskab, Maria-Desislava Ignatova-Grocevab, Daniela Todorova3 and Simeon Popov3 a Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria. Fax: 003592-700-225 . E-mail: [email protected] b Faculty of Biology. Sofia University, Sofia 1000, Bulgaria * Author for corresponden...
—Island species, particularly endemics, tend to have lower genetic diversity than their continental counterparts. The low genetic variability of endemic species and small populations has a direct impact on the evolutionary potential of those organisms to cope with changing environments. We studied the genetic population structure and morphological differentiation among island populations of the...
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