Tag: "fragmentation" at biology news
Lecture on ecology of infectious diseases
Urbanization results in the fragmentation
of native habitats, which dramatically alters the rate of transmission and spread of infectious diseases, scientists are finding. Case in point: Native grasslands throughout the western United States are becoming the most rapidly urbanized ecosystems...
Warmer weather, human disturbances interact to change forests
...ly modifies change in the forests, and logging and fragmentation
would affect the northward migration of southern species during a period of climate warming." Although scientists know that species migration occurs as the climate changes - there is evidence of this from the last ice age, Scheller says - for at leas...
Society for conservation biology conference
...rd attacks on humans have increased due to habitat fragmentation
and decline in wild prey. Getting the Most from International Youth Environmental Education, A Lesson from Venezuela Environmental education is frequently recommended as a way to change local attitudes towards an endangered species or ecosyst...
Summer in the South: Kudzu and oriental bittersweet
...maps derived from satellite images to model forest fragmentation
in the United States. Recent studies show that, although there are still large uninterrupted areas of forest in the United States, almost 62 percent of U.S. forest land is within 150 meters (492 feet) of the forest edge. Another study found that half...
New highways drive accelerating deforestation in Amazonia
...urther increases in Amazon forest destruction, but fragmentation
of the surviving forests on an unprecedented spatial scale."...
Mother lode of jaguars discovered in Bolivia park
...al role in its protection. The authors warn that fragmentation
of habitat, both within the Chaco and other areas, coupled with poaching, continue to threaten jaguars throughout their range. The researchers are now looking at how to better protect jaguars both in and out of the park part of a long-term WCS camp...
New research explores 'early bird' and 'night owl' sleep patterns
...st (total rest time relative to interval time) and fragmentation
of rest (Frag; calculated as the number of transitions (per hour) from a minimum six second rest period to a minimum four second period of activity) was obtained from a computerized open-field activity monitoring system that was integrated with the s...
Global warming and the onward march of the pine
...linger of the University of Vienna, "Shrinkage and fragmentation
of alpine habitats, as a consequence, may pose a serious threat to populations of many alpine plants, especially to regional endemics. On the other hand, expansion of mountain forests may also improve certain ecosystem services for human welfare, suc...
JCI table of contents, 2 April 2004
...ion of platelets through antibody-induced platelet fragmentation
is increased in this disease. Previous reports have indicated Ab-induced fragmentation
was due to the generation of reactive oxygen species (ROS), including peroxide. An active NADPH oxi...
New study of land use effects on amphibian populations gets underway at UGA laboratory
...tion dynamics in relation to forest alteration and fragmentation
resulting from forest management practices. As part of the Land Use Effects on Amphibian Populations (LEAP) study, the researchers will conduct similar experiments in their respective regions over the next five years. In the first year (2004), experi...
Gladstone study reveals how genetic factor may increase risk for Alzheimer's disease
...ion, unlike apoE4 produced by other brain cells; fragmentation
is correlated with age, occurring more frequently ...fect of age on Alzheimer disease risk in humans; fragmentation
of apoE4 occurs predominantly in the very parts of the brain that are most vulnerable to Alzheimer's...
Freeze-dried sperm can fertilize rabbit oocytes
... rabbit sperm, breaks plasma membranes, and causes fragmentation
of the sperm tails. Nonetheless, the chromosomes remain intact in the "dead" sperm. Even after being stored at temperatures above freezing for more than two years, the treated sperm were as capable as fresh sperm at fertilizing rabbit oocytes. In a p...
Keeping populations of cerulean warbler healthy
...d an estimated 70 percent, the decline tied to the fragmentation
and destruction of habitat in both breeding and winter ranges. For its breeding range, the bird needs large areas of mature deciduous forest, often along streams: in the southeastern United States, much of this habitat has been lost to agriculture or...
European Virtual Institute for Genome Annotation receives 12 million Euro
...formatics. The network aims to address the current fragmentation
of European bioinformatics by creating a virtual r...rk of Excellence" (NoE), is designed to tackle the fragmentation
of European research by creating durable structures for future research in certain priority areas, i...
Squirrel invasion sows seeds of change for future forests
...nly been able to invade here because of widespread fragmentation
of forested land cleared for agriculture." The gra... forest dweller that is highly sensitive to forest fragmentation
and habitat loss, Swihart said. "It comes as a surprise to many people, but the gray squirrel is ver...
Liberia announces protection of 155,000-acres of forest
...nsustainable logging and poaching. Extreme habitat fragmentation
and degradation continue to threaten much of the remainder of Liberia's unprotected forests. The forest reform process took a major step forward in mid-October, when more than 200 Liberian foresters gathered at a workshop led by CI and the Society f...
A bird in a tree for biodiversity
...o Tanzania's East Usambara Mountains where habitat fragmentation
has broken a mutual relationship with the birds th...eptonychia's survival. "It's been shown that land fragmentation
has had impacts on animal species, but there's been little study to see if relationships between pla...
Countries find common ground to protect world's rarest gorilla
...and is highly threatened from poaching and habitat fragmentation
and loss. The two countries--represented by Cameroon's Minister of Environment and Forestry Chief Tanyi-Mbianyor Clarkson and Nigeria's Federal Minister of Environment Col. Bala Mande (Retired)--signed the agreement that will pave the way for a tran...
Modern global warming more damaging than in the past
...ean at the end of the last ice age. Because of the fragmentation
of the islands, the reptiles were stuck in their individual habitats. As temperatures increased, more heat-tolerant reptiles were not able to replace those that died out on the island, and whole populations were lost. These areas experienced a net lo...
... water resources in South Africa, effects of river fragmentation
on shrimp in the Caribbean, and the effects of drought on fish populations....
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