Decline of endangered California delta smelt linked to nutrient pollution

Posted on Jun 14, 10 at 12:02 pm. 
Decline of endangered California delta smelt linked to nutrient pollution art
A new study recommends that efforts to restore the endangered California delta smelt and other declining pelagic fish should more sharply focus on reducing nutrient pollution to the species' native waters. The research indicates these fish populations would greatly benefit from reductions in the amount of nitrogen flowing into the Sacramento-San Joaquin Bay-Delta from waste-water treatment plants and balancing the ratio of nitrogen and phosphorus contained in the discharged water.... ...
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Prehistoric fish extinction paved the way for modern vertebrates; Event of unknown origin occurred as first vertebrates tested land

Posted on Jun 14, 10 at 12:02 pm. 
Prehistoric fish extinction paved the way for modern vertebrates; Event of unknown origin occurred as first vertebrates tested land art
A mass extinction of fish 360 million years ago hit the reset button on Earth's life, setting the stage for modern vertebrate biodiversity, a new study reports. The mass extinction scrambled the species pool near the time at which the first vertebrates crawled from water towards land, scientists report. Those few species that survived the bottleneck were the evolutionary starting point for all vertebrates -- including humans -- that exist today.... ...
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Oil spill threatens toothy marine predator that is cultural and historic icon

Posted on Jun 14, 10 at 12:02 pm. 
Oil spill threatens toothy marine predator that is cultural and historic icon art
The BP oil blowout in the Gulf of Mexico threatens the existence of a critically endangered sawfish and its relative that recently has been proposed to join it as the only two marine fish in United States waters to receive such federal protection.... ...
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New methodology to define safe distances between sensitive ecosystems and marine farms

Posted on Jun 14, 10 at 12:02 pm. 
New methodology to define safe distances between sensitive ecosystems and marine farms art
Scientists have developed a methodology to detect the influence of discharges from open water fish farms on marine ecosystems. With this methodology, based on the analysis of the isotopic signal of nitrogen in the tissue of marine macrophytes, coastal managers can select areas which are suitable for aquaculture under ecological criteria, in order to establish a safe distance between the farm and the sensitive ecosystem.... ...
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Could climate change and biodiversity of marine plankton in North Atlantic affect carbon cycle?

Posted on Jun 14, 10 at 12:02 pm. 
Could climate change and biodiversity of marine plankton in North Atlantic affect carbon cycle? art
Over the last decades, global warming has been accompanied by an increase in the taxonomic biodiversity of phytoplankton and zooplankton in the North Atlantic Ocean and a reduction in the average size of these organisms, according to researchers. They demonstrate that this structural modification of biological systems could bring about an alteration to the carbon sink in the North Atlantic and a reduction in the presence of subarctic fish such as cod.... ...
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