Tag: "fragmentation" at biology news
Pandoras box of pathogens
...which, taken together, seem to suggest that forest fragmentation
and increases in the populations of the Brown-headed Cowbird may increase the potential for future outbreaks. Focusing on the Henipavirus outbreaks that emerged in Australia and Malaysia in the 1990s, Peter Dazak, of the Consortium for Conservatio...
More raccoons may mean fewer songbirds
... the eradication of top carnivores, and by habitat fragmentation
and conversion to agriculture. In Illinois, more than 70% of forest gone, and row-crops cover about half of the land. "Habitat conversion and the loss of top carnivores have allowed...raccoons to flourish, in turn creating a hostile landscape for son...
Biologists find unexpected rapid evolution in Caribbean lizards
...ch as species ecology has an impact on the rate of fragmentation
and speciation. Cuba is the largest island, followed by Hispaniola, Jamaica and Puerto Rico.Does speciation occur differently if the playing field is larger? "Having at least two species from each island and all of the islands varying in size allow...
19th century museum specimens help plan reintroduction of endangered tiger beetle
...his suggests that the human impacts leading to the fragmentation
of these tiger beetle populations resulted in the ...analyzed, suggesting that human impacts led to the fragmentation
of these tiger beetle populations and the concomitant single-letter DNA shuffle that became permanen...
Researchers discover birds protect trees in neotropics by eating insects
...orests, bird populations are declining amid forest fragmentation
as areas are cleared for ranching, farming or housing. The yearlong research project, the first to study bird-arthropod interactions in a Neotropical forest canopy, was carried out by Sunshine A. Van Bael, a doctoral student in animal biology at Ill...
Monogamous animals may be more likely to die out
...te is unnaturally high due to overhunting, habitat fragmentation
and other disturbances caused by people. Knowing which species are particularly sensitive to these disturbances would help conservationists figure out how to save them. Since 1970, more than half of the mammal populations in Ghanian reserves have bec...
Three Gorges Dam is an opportunity for ecoscience
...the process of ongoing human development. Habitat fragmentation
occurs when human development or some other force ... more than 100 mountaintops as islands. "Habitat fragmentation
is a pervasive global problem that has generally been recognized as the primary cause of the loss of...
Cheap coffee is lousy for tigers, elephants, rhinos Science says
...nd rhinoceroses, all of which are declining due to fragmentation
and loss of their forest home. The authors say that the U.S. can play a key role in halting this wave of deforestation. As the leading consumer of robusta coffee the U.S. should reassert itself as a strong member of the ICO, and call for certificati...
How far to the nearest road?
...n recognition that roads play a key role in forest fragmentation
in the U.S. Results showed that 20 percent of all land area was located within 127 meters (417 feet) of the nearest road, and 50 percent was within 382 meters (1253 feet). Only 18 percent of U.S. land area was more than 1000 meters (0.6 mile) from a ...
Forest fragmentation may increase Lyme disease risk
...ile fever and other insect-borne diseases. Forest fragmentation
could explain the increase. This research is impor... Lyme disease should be directed toward decreasing fragmentation
of deciduous forests of the northeastern United States into small patches, particularly in areas wit...
Rainforests at risk: Where theres smoke, theres even more fire
...ntional. Cochranes research shows broad forest fragmentation
above and beyond the intentional clearing of rainforest. The specialized satellite images he has created show a different type of destruction. The areas damaged by unintentional fires arent shown by cleared squares, but rather thinned, decimated clum...
Forests of the continental U.S. continue to fragment
...S. forests are still connected over large regions, fragmentation
is pervasive enough to potentially affect the ecol...maps derived from satellite images to model forest fragmentation
across the continental U.S. "Fragmentation refers to both the amount of forest and its spatial patte...
Forest fragmentation may increase lyme disease risk
...the disease. "These results suggest that...habitat fragmentation
can influence human health,"say Felicia Keesing of...nd other mosquito-borne diseases. To see if forest fragmentation
could increase the risk of Lyme disease, Keesing and her colleagues studied blacklegged tick nymphs ...
Emerging threats to tropical forests
...e examples include interactions among fire, forest fragmentation
and regional desiccation; synergisms between logging and hunting; large-scale edge effects; impacts of exotic diseases on tropical biotas; and the effects of global climate change on tropical ecosystems. Interested participants should contact the s...
Researchers tie worldwide biodiversity threats to growth in households
...hich has contributed to deforestation and loss and fragmentation
of habitat for giant pandas. The "double toll" a reduction in average household size takes on the environment, say the scientists, includes more land use and more materials consumed for construction, and a lower efficiency of resource use per person....
Smaller households fuel global housing boom and threaten biodiversity, study finds
...ew homes had led to deforestation and the loss and fragmentation
of habitat for giant pandas. The authors found that, even in hotspot nations such as Greece, Italy and Spain where the population growth rate is declining, the number of households is mushrooming because fewer people are living together. Urban spraw...
UCLA study shows water reclamation could become an important source of future water supplies
...untains west of the Los Angeles basin has produced fragmentation
of natural areas, including small watersheds. This habitat loss and fragmentation
threatens the long-term existence of many native plants and animals, and represents the greatest thr...
Allergic to your DNA?
...es that characterize apoptosis include nuclear DNA fragmentation
and digestion although research has shown that cel...nd therefore its activity) and so no apoptotic DNA fragmentation
occurred. The DNase II-deficient flies were able to fragment DNA inside the dying cells, but the fra...
Fragmentation may be linked to local amphibian extinctions
is a primary threat to amphibians worldwide, and n...Experimental evidence for three species shows that fragmentation
may hinder the dispersal of juvenile amphibians, which could contribute to population declines. "Ha...
New Amazon forest monitoring team: RAINFOR
...global climate change. Climate change and forest fragmentation
(Laurance et al. 2002), as well as surprising ecological changes such as newly reported increases in liana densities (Phillips et al. 2002), threaten to turn the Amazon into a major carbon source in the 21st Century, potentially accelerating climate ...
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