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What A Week It Was: Apocadocuments from
View By Scenario:
Species Collapse:(6)
Plague/Virus:(1)
Climate Chaos:(12)
Resource Depletion: (3)
Biology Breach:(12)
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This Week's Top Ten Very Scary Tags:
oil issues  ~ carbon emissions  ~ contamination  ~ carbon sequestration  ~ ecosystem interrelationships  ~ ocean warming  ~ global warming  ~ dead zones  ~ corporate farming  ~ heavy metals  ~ toxic buildup  



ApocaDocuments (3) matching "ecosystem interrelationships" from this week
[see full week] ~ [see all stories tagged "ecosystem interrelationships"]
Sat, Jul 3, 2010
from McClatchy:
Oil found in Gulf crabs raises new food chain fears
University scientists have spotted the first indications oil is entering the Gulf seafood chain -- in crab larvae -- and one expert warns the effect on fisheries could last "years, probably not a matter of months" and affect many species. Scientists with the University of Southern Mississippi and Tulane University in New Orleans have found droplets of oil in the larvae of blue crabs and fiddler crabs sampled from Louisiana to Pensacola, Fla. "I think we will see this enter the food chain in a lot of ways -- for plankton feeders, like menhaden, they are going to just actively take it in," said Harriet Perry, director of the Center for Fisheries Research and Development at the Gulf Coast Research Laboratory. "Fish are going to feed on (crab larvae). We have also just started seeing it on the fins of small, larval fish -- their fins were encased in oil. That limits their mobility, so that makes them easy prey for other species. The oil's going to get into the food chain in a lot of ways."... "I had a sort of breakdown last week," Perry said. "I've driven down the same road on East Beach in Ocean Springs for 42 years. As I was going to work, I saw the shrimp fleet going out, all going to try to work on the oil, and I realized the utter futility of that, and I just lost it for a minute and had to gather myself." ...


I guess we'll soon find out who's the weakest link!

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Thu, Jul 1, 2010
from New Scientist:
Zoo plans to bring rare animals back from the dead
TAKE frozen cells from a dead animal, reprogram them to become sperm and eggs, then use these to bring endangered species back from the brink. That's the aim of a collaboration between the San Diego zoo and The Scripps Research Institute in La Jolla, California.... The team's long-term goal is to coax iPS cells into becoming sperm and eggs. They will be making iPS cells from tissue held by San Diego zoo's Frozen Zoo project - which has samples from some 8400 individuals representing more than 800 species. The sperm and eggs could be used in IVF treatments to add genetic diversity to captive breeding programmes. "You could actually breed from animals that are dead," says Loring. ...


Great! Then we can recreate their habitats, too!

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Wed, Jun 30, 2010
from PhysOrg:
Nutrients, viruses and the biological carbon pump
Adding nutrients to the sea could decrease viral infection rates among phytoplankton and enhance the efficiency of the biological pump, a means by which carbon is transferred from the atmosphere to the deep ocean, according to a new mathematical modelling study. The findings, published in the Journal of Theoretical Biology, have implications for ocean geo-engineering schemes proposed for tackling global warming. Tiny free-floating algae called phytoplankton dominate biological production in the world's oceans and sit at the base of the marine food web. Their population dynamics are controlled by sunlight, nutrient availability, grazing by tiny planktonic animals (zooplankton) and mortality caused by viral infection. "Viruses are the most abundant organism in the world's oceans, and it is thought that all phytoplankton species are susceptible to infection. Our aim was to model the interaction between viruses, phytoplankton, zooplankton grazing and nutrient levels".... The researchers took an 'eco-epidemic' modelling approach, taking into account the mutual interaction between the effects of ecology and disease epidemiology. This approach has been used previously to model the effects of infection by pathogens on the population dynamics of mammals and invertebrate animals.... Artificial enhancement of the biological carbon pump by fertilizing the oceans with nutrients has been proposed as a possible geo-engineering 'fix' for global warming caused by the increase of atmospheric carbon dioxide from anthropogenic sources. "The decrease in viral infection rates caused by artificially adding nutrients to the sea could in the future benefit humans by increasing the efficiency of the biological carbon pump, making these proposed ocean geo-engineering schemes more viable," said Dr Rhodes. ...


As far as I know, extra nutrients never caused any problems anywhere else.

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