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What A Week It Was: Apocadocuments from
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ApocaDocuments (4) matching "ecosystem interrelationships" from this week
[see full week] ~ [see all stories tagged "ecosystem interrelationships"]
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Sun, Mar 8, 2009
from Telegraph.co.uk:
The toxic sea: the other CO2 problem
They are calling it "the other CO2 problem". Its victim is not the polar bear spectacularly marooned on a melting ice floe, or an eagle driven out of its range, nor even a French pensioner dying of heatstroke. What we have to mourn are tiny marine organisms dissolving in acidified water.
In fact we need to do rather more than just mourn them. We need to dive in and save them. Suffering plankton may not have quite the same cachet as a 700-kilo seal-eating mammal, but their message is no less apocalyptic. What they tell us is that the chemistry of the oceans is changing, and that, unless we act decisively, the limitless abundance of the sea within a very few decades will degrade into a useless tidal desert. ... On average, each person on Earth contributes a tonne of carbon to the oceans every year. The result is a rapid rise in acidity -- or a reduction in pH, as the scientists prefer to express it -- which, as it intensifies, will mean that marine animals will be unable to grow shells, and that many sea plants will not survive. With these crucial links removed, and the ecological balance fatally disrupted, death could flow all the way up the food chain, through tuna and cod to marine mammals and Homo sapiens. As more than half the world's population depends on food from the sea for its survival, this is no exaggeration. ...
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It's just a little evolutionary pressure. Come on, species, get with it!
ApocaDoc
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Sat, Mar 7, 2009
from Rochester Post-Bulletin:
Many factors to blame for our bad air
On the surface, it would seem to be a mystery: Why would Rochester, a far smaller city, have air quality similar to that of the Twin Cities?
The answer lies in the old business adage: Location, location, location. Unfortunately, Rochester's is not so hot. Geography and meteorology conspire against the city.
Rochester is the victim of large southerly air masses that slowly drift northward. On a bad air day, the air mass is laden with particle pollutants collected from a broad swath of territory stretching from Sioux Falls, S.D., to Milwaukee and even Chicago.
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Hmmm... Could it be everything is connected, including the sky?
ApocaDoc
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Wed, Mar 4, 2009
from Environmental Health News:
Migrating vultures succumb to lead
An increasingly rare species of vulture that migrates from Mongolia to overwintering grounds in South Korea can pick up enough lead along the way to poison and kill them.
Lead poisoning may be the reason a globally threatened species of vulture is frequently found dead in the wild. The vulture is native to Europe and Asia. One large population overwinters in South Korea near the demilitarized zone (DMZ). Researchers examined 20 dead birds found in the area. They analyzed the animals' kidneys, liver and bones for lead and other metals.
They found very high levels of lead in these birds. Fourteen individuals had potentially toxic levels in their liver and kidneys.... The results also highlight that wildlife can transport toxic chemicals to new locations where it can then enter different food webs.
The authors suggest that the birds may pick up the poisonous lead during their migration by feeding on other animals that are contaminated with the heavy metal. The lead might come from ammunition used for hunting. ...
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And who, prey tell, will feed on the vulture?
ApocaDoc
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Tue, Mar 3, 2009
from KSU, via EurekAlert:
Birds in Flint Hills of Kansas, Oklahoma face population decline despite large habitat
"Because of its size, the Flint Hills is assumed to be a population stronghold for grassland birds," said Kimberly With, a K-State associate professor of biology who led the study. "Mostly this has been based on bird counts, but they can be misleading because they don't show what the region is capable of producing. Birds are very mobile and thus birds could come from elsewhere to give the appearance of a stable population year after year. This is especially true if the region attracts birds because of its size, but birds do not breed successfully once they settle here."... They conducted a two-year study of regional viability of three grassland birds: the dickcissel, grasshopper sparrow and eastern meadowlark. With and her colleagues found that none of these bird species is viable in the 4 million-acre Flint Hills region. They estimated population declines of as much as 29 percent per year during the years studied. ...
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We've put the grassland to productive use -- who needs a few more birds, anyway?
ApocaDoc
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