Sentences with phrase «between isolated populations»

Not exact matches

The authors examine the concept and importance of maintaining connectivity (ability of wildlife populations to move among landscapes between habitat «islands» such as mountain tops, forest fragments and isolated wetlands) and corridor ecology.

But between roughly 10,000 and 20,000 years ago, all except a few isolated island populations disappeared.

Caribou populations are predicted to become more isolated and fragmented as climate change shrinks habitat and as caribou have fewer opportunities for genes to flow between individuals and herds, explained Hundertmark.

However, other populations in the region that lack such genetic diversity and are unable to adapt to the harsher conditions could become isolated if they can not fly to more climatically suitable areas because the landscape in between is unsuitable.

«Playback experiments between geographically isolated taxa provide key data on how populations might perceive each other in terms of «same» or «different» if they were in actual contact,» according to Louisiana State University's J.V. Remsen, an expert on Neotropical birds who was not involved in the research.

«In terms of practical nature conservation, these results signify that in the future it will no longer be sufficient to preserve small, isolated reserves — while these benefit specialized species with a simple genetic structure, the bulk of species that depend on an exchange between local populations will lose out in the medium to long term,» predicts Schmitt, and he adds in closing, «This will lead to a further decline of numerous insect species — with dramatic consequences for entire food webs and ecosystems.»

In principle, some of these limitations can be overcome by applying high - throughput sequencing to the study of introgression between partially - isolated populations that are characterized by a long history of extensive gene flow.

Caribou populations are predicted to become more isolated and fragmented as climate change shrinks their habitat and they have fewer opportunities for genes to flow between individuals and herds, explained Hundertmark.

The researchers estimate the statistical relationship between the size of the Catholic population in 1900 and the extent of private schooling today and use this estimate to isolate the causal effect of private school competition on contemporary student achievement.

The Falklands population could provide a link between these two populations, but it appears to be almost isolated during the breeding season.

The Falklands population could provide a link between the two larger populations of the breeding stock, namely those of South Georgia and the Valdes Peninsula, but it appears to be almost isolated from these two populations during the breeding season.

For spotted skunks we found levels of genetic differentiation between the 2 island populations that were roughly equivalent to that between island and mainland localities, suggesting that island populations have been isolated from each other for about as long as they have been isolated from the mainland.

As pockets of forest habitat are isolated, their edges are exposed to harsher, brighter, drier conditions and plant and animal dispersal between habitat fragments is made more difficult; in addition, habitat fragments may be too small to sustain populations of some species.