Tag: "invasions" at biology news
Viral suspect for amphibian decline traced to human spread through bait
...al activities, all have been involved in microbial invasions
of sorts. The transportation and sale of live bait is the latest example of a seemingly innocent human activity that may be responsible for spreading such diseases with dramatic ecological consequences. Evidence for this comes from the genetic analy...
Invaders that did no harm?
...l mechanisms determining the outcome of biological invasions
is of equal interest to scientific and business communities. Do invaders bump residents out by competing with them for scarce resources, or do they merely move in without causing harm to their neighbors? In one of the first environmental impact st...
Lehmann lovegrass won't succumb to fire
...unity it's invading. "Success of biological invasions
is species- and site-specific," McPherson said. Be...relationships between species. "Biological invasions
usually cause extinction, so we have to assume that Lehmann is not a good thing," he said. H...
Forest managers can fight invasive species that come with roads
..., Hawbaker used a computer model to simulate plant invasions
along roads using a variety of dispersal patterns. Usually, seeds of invasive species are spread by animals or wind over short distances, but on rare occasions can also be spread over long distances by animals, wind or vehicles. When successful, thes...
Articles on forest fire risks published in BioScience
...e. Previous assessments have concentrated on grass invasions
that can provide fuel, but Brooks and colleagues examine numerous additional ways that invasions
can affect fire susceptibility and note that many of them are not widely recognized. Invaders can bo...
Looking beyond biodiversity to explain community invasibility
...r examine only short time periods. To evaluate how invasions
are controlled in more realistic situations, Meiners, Cadenasso, and Pickett analysed data from 42 continuous years of sampling old field succession. In contrast to the experimental literature, they found that when richness was related to invasion d...
Attack of the crazy ants - invasional 'meltdown' on an oceanic island
have well-known direct effects on native ecosystems but may also unleash forces with complex, unexpected consequences. These ecological surprises may be especially common in simple systems, like islands, following introduction of 'megainvaders,' like...
Studies probe rapid evolution of Chinese tallow trees
...ive insects -- may play an important role in plant invasions
and their eventual integration into the local flora. To test this theory, Siemann, Rogers, and Saara DeWalt, the Huxley Instructor of Ecology and Evolutionary Biology, are growing seedlings from seeds collected from states across the southern U.S. Wo...
Paving roads can increase weed invasions
...nities remain to prevent exotic [non-native] plant invasions
in this semiarid landscape by minimizing the construction of new roads and the improvement of existing roads," say Gelbard and Belnap....
Special section: Invasive species
...e special section include: Arguments that species invasions
are natural and so acceptable are false. While it is true that invasions
have occurred throughout evolutionary history, people have greatly accelerated the rate of introduct...
Non-native earthworms may be wiping out rare plants
...es. In support of this, he observed that earthworm invasions
were more severe closer to roads. Based partly on Gundale's work, the U.S. Forest Service is trying to protect the goblin fern by restricting logging and road-building where it grows....
Clock cues: Cellular sensing, metabolism research wins Amersham Biosciences and Science Prize
...nds the body against a wide variety of insults and invasions
by generating a vast repertoire of antibodies. To produce these unique antibodies, the immune system restricts gene rearrangements to only one of two possible versions (alleles) of each gene in newly created B cells. At the Hebrew University in Israe...
Californias native grasses can be restored
...cies to investigate one of the most dramatic plant invasions
worldwide, the invasion of 23 percent of California by annual plant species introduced from Mediterranean Europe," said Seabloom. The experiments were conducted at Santa Barbara County's Sedgwick Reserve, part of the UC Natural Reserve System which i...
AAAS at the BA: Whale food, winners and losers in Antarctica and solar insights
...l change itself, but in surviving competition from invasions
by alien species from lower latitudes. Marine species, in contrast, appear highly fragile in the face of predicted environmental temperature change and may be amongst the most vulnerable on earth because of their poor physiological capacities to cope...
Trees encroaching grasslands may lock up less carbon than predicted
...essments relying on carbon stored from woody plant invasions
to balance emissions may therefore be incorrect," Jackson and four co-authors wrote in the Aug 8, 2002 edition of the journal Nature. Jackson, an associate professor at Duke's Biology department and Nicholas School of the Environment and Earth Scienc...
Ecologist's book on introduced species' destructiveness
...iculture and Life Sciences. "In the United States, invasions
of non-native plants, animals and microbes are thought to be responsible for 42 percent of the decline of native species now listed as endangered or threatened." The names of some invading species are threatening enough. For instance, giant hogweed, ...
Vessel reporting a weak link in national strategy to stem the flow of alien organisms to the U.S.
...and spread. It is clear that many such biological invasions
can alter dramatically the function of our ecosyst...cientists have shown that the number of documented invasions
continues to increase in U.S. coastal waters. On a global scale, biological invasions
are now consi...
Invading species have harder time cracking diverse plant communities
... restoration, will suffer less from exotic species invasions
if a diverse mix of species is present. The work w...ed the father of ecology, published a 1958 book on invasions
of exotic species in which he proposed his idea, which is known as the Diversity-Resistance Hypothes...
Extreme climate variance sped extinction of local butterfly populations, researchers say
...population growth can bring urban sprawl and plant invasions
that isolate one population "island" from another and create insurmountable barriers to migration and repopulation. The checkerspot species as a whole has a larger range - from Baja to Canada - than that of the Bay Area subspecies. But a 1996 study b...
Proliferation of Argentine ants in California linked to decline in coastal horned lizards
...e been conducted." "Our work demonstrates that invasions
can have community-wide effects," adds Suarez, now... the remaining habitat is monitored to prevent the invasions
of exotic ants."...
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