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What A Week It Was: Apocadocuments from
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ApocaDocuments (3) matching "tipping point" from this week
[see full week] ~ [see all stories tagged "tipping point"]
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Sun, Oct 24, 2010
from ScienceDaily:
From Bees to Coral Reefs: Mutualisms Might Be More Important to Global Ecosystem Than Previously Thought
Mutually beneficial partnerships among species may play highly important but vastly underrecognized roles in keeping the Earth's ecosystems running, a group of evolutionary biologists suggests in a study.... Experts from several fields joined forces in this study and published their conclusions in Ecology Letters, one of the most influential journals in the field of ecology.
"The alarmist view is that if you disrupt an interaction, you lose the interaction, you lose the community, and, ultimately, the ecosystem," Bronstein said. "We are trying to challenge people to make that explicit and to figure out whether their data support that. We need to ask, 'What is the range of possible things that can happen?'"
"It is not all doom-and-gloom," lead author E. Toby Kiers added. "There are clear cases in which mutualisms show a surprising ability to adapt to global change." ...
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Not to sound alarmist, but we're screwing it up!!
ApocaDoc
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Sat, Oct 23, 2010
from BBC:
Nagoya biodiversity talks stall on cash and targets
Conservation groups have expressed concern that a major UN conference on nature protection is stalling, with some governments accused of holding the process hostage to their own interest.
Their warning comes halfway through the UN Convention on Biological Diversity (CBD) meeting in Nagoya, Japan.
During negotiations some countries have proposed weaker rather than stronger targets for protection, they say.
Some developing countries say the West is not meeting their concerns.
"The most optimistic assessment is that we have not gone far towards a deal," said Muhtari Aminu-Kano, senior policy advisor with BirdLife International....
"It's your usual story - it's people putting their national interests far above the importance of biodiversity." ...
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I'm all for supporting biodiversity. Just not in my backyard.
ApocaDoc
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Thu, Oct 21, 2010
from PhysOrg:
Climate change may create tipping points for populations, not just species
When species respond in different ways to the same amount of warming, it becomes more difficult for ecologists to predict future biological effects of climate change--and to plan for these effects.
In a study published this week in the journal Nature, University of Wyoming ecologist Daniel Doak and Duke University ecologist William Morris report on a long-term study of arctic and alpine plants.
The results show why some species may be slow to shift their geographic ranges in the face of climate change, and why we might expect to see sudden shifts as warming continues.... However, the researchers' results don't indicate that these plants, or other species, will be unaffected by warming conditions.
By looking at the performance of individual plants in particularly hot and cold years, they found that the compensatory effects across moderately cold to moderately warm years (lower survival balanced by more rapid growth) will not hold up with increased warming.
Instead, in the warmest years at all study sites, both survival and growth of the plants fell.
"Up to a point," says Doak, "we may see little effect of warming for many organisms. But past a climatic tipping point, the balance of opposing effects of warming will likely cease, leading to subsequent rapid declines in populations." ...
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So far, so good!
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