Tag: "fragmentation" at biology news
Songbird population declines linked to acid rain
... the topography, elevation, vegetation and habitat fragmentation
at more than 650 study sites across the geographic range of the species. "Massive surveys like this one and the BBS could never be accomplished without the participation of citizen-scientists,"says Hames. Cornell ecologists used the data collected in...
...r species should be much more sensitive to habitat fragmentation
than those of smaller species. Says Haskell: "We t...food is naturally very sparse and patchy. Further fragmentation
makes it very difficult for these animals to obtain enough food and survive in fragmented environmen...
Ecology and conservation of fragmented tropical forests
...at examined the causes, scope, and consequences of fragmentation
in studies from 12 countries on five continents. T...arge scale experimental studies of tropical forest fragmentation
in the Brazilian Amazon, the Biological Dynamics of Forest Fragments (BDFF) Project, presented an ov...
Study offers a rare view of how species interactions evolve
...aic of coevolutionary hotspots and coldspots, then fragmentation
of habitats will fundamentally change the way coevolution maintains biodiversity," Thompson said....
Rainforest wildlife surprisingly sensitive to landscape changes
...on in 1979. They found that the effect of habitat fragmentation
on the structure, composition and function of rain...t regeneration, and the effects of forest edge and fragmentation
on the genetic structure of tropical species. The Smithsonian Tropical Research Institute, headquart...
Intels Gordon Moore and CIs Claude Gascon to receive major award
...sity, conservation, wildlife management and forest fragmentation
in the Amazon. He co-edited the recently published...f a Fragmented Forest, about deforestation, forest fragmentation
and issues establishing conservation and management guidelines. His Royal Highness Prince Bernhard i...
Forest fragmentation and birds
...g conflict in data. Long term populations of many fragmentation
sensitive birds depend upon the proportion of the ...by a rate of 3.11 percent. Past studies of forest fragmentation
and birds focused on the size of a given forest patch and its relationship to the density of a bird ...
April GEOLOGY and GSA TODAY media highlights
... the overriding plate led to local deformation and fragmentation
of the arc. Migration of methane gas through the hydrate stability zone in a low-flux hydrate province. Andrew R. Gorman et al. Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA. Pages 327-330. New high-resolu...
Long term lessons from Amazonia
... from one of the longest ongoing studies of forest fragmentation
in the Amazon, the Biological Dynamics of Forest F...Bill Laurance. They are: "Deforestation and forest fragmentation
in the Amazon" (with Gascon, Bierregaard and Judy Rankin-de Merona), "The hyper-diverse flora of the...
Fragmentation can make seedlings wimpy
New research shows that fragmentation
of tropical forests can make treeswimpy. Seeds fro...allerleaves. This is the first study of how forest fragmentation
affectsseedling quality. "Fragmentation of tropical dry forests reduces genetic variation andseedlin...
Smithsonian researchers show Amazonian deforestation accelerating
...ays Laurance. That could increase forest loss and fragmentation
on an unprecedented scale....
Special section: Habitat fragmentation can amplify
is even more devastating than wethought. Fragments...the effects offragmentation. However, most habitat fragmentation
studiesfail to take other environmental changes into account, simplyfocussing on the fact that fragm...
NASA helps conservation biologists get the big picture
...lanet and the life on it are changing, from forest fragmentation
to the possible link between UV-B radiation and amphibian declines. To explore NASA's role in conservation, the August issue of Conservation Biology includes a 12-paper special section "NASA and the Conservation of Biodiversity", which was co-edited...
Fragmentation may limit songbird sex lives
... the decline of songbirds in North America: forest fragmentation
may put a cramp in their sex lives. "Our results ...ogy. Norris and Stutchbury studied the effects of fragmentation
on male hooded warblers, small yellow songbirds with black caps and throats. To see if fragmentation...
Fragmentation linked to stress in birds
...forest birds are particularly sensitive to habitat fragmentation
-- even patches as big as 250 acres are missing ma...onservation Biology. This the first evidence that fragmentation
may have direct physiological effects. Stratford and Stouffer compared feathers from two common bir...
Field Museum plays vital role in creation of huge new park
... offers the rare opportunity to act before habitat fragmentation
and degradation forever transform the landscape." In 1999, APECO spearheaded an initiative to establish a national park in the Cordillera Azul mountains. To support that effort, Field Museum scientists and colleagues launched this RBI with funding fr...
How to keep invasive plants out of forest fragments
...Biology. "Our work addresses the impact of forest fragmentation
at the 'neighborhood' scale -- what happens when developers put up a new strip mall or housing complex. The development of our landscapes continually fragments forests and [that] should be considered when thinking about the distribution and degree of...
A new way for cells to die
...aptosis". While apoptotic cell death is marked by fragmentation
of the cell, its nucleus, and even its DNA, paraptosis shows none of the hallmarks of apoptosis; instead, paraptosis is characterized by the formation of empty spaces called vacuoles in the cell cytoplasm, along with mitochondrial swelling. Paraptot...
DNA research reveals new bird species in Colorado
...cies is at risk of extinction due to habitat loss, fragmentation
and degradation. Meanwhile, federal, state and local groups have come together to develop locally supported conservation plans. These plans identify ways of improving grouse habitat, and many recommend moving some of the Gunnison sage-grouse to other...
Golgi lipids regulate protein trafficking
...d normally into regulated secretory vesicles. The fragmentation
of the Golgi apparatus seen in PLA2-overexpressing cells is similar to a change that occurs during mitosis. The authors indicate that PLA2 activity rises during this period of the cell cycle, and they suggest that the accumulation of phospholipid met...
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