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domenica 6 dicembre 2015

MASS EXTINCTION: THE WORLD'S BIGGEST RISKS

Many native species of marine creatures are under serious threat of extinction, due to lack of proper conservation strategies, according to K Venkataraman, eminent scientist and former Director of Zoological Survey of India (ZSI).


To ensure conservation of the endangered species, he stressed the need for bio-physical monitoring studies and awareness campaigns.

Research on the status and database of all species should be given priority to tackle the danger of extinction, he said, adding that a strategy action plan should be formulated to make conservation measures effective.
He was speaking after inaugurating the four-day national workshop on integrative taxonomy of freshwater species, organised by the Centre for Taxonomy of Aquatic Animals, Kerala University of Fisheries and Ocean Studies (KUFOS) here.
Taxonomy plays an important role in the conservation of fishes. Taxonomy of many organisms is yet be settled and finalised. The country requires a good deal of taxonomists to scientifically assess the aquatic wealth and propose major threats being faced by the species, he added.
The scientific community should also be able to make the public aware about the importance of the conservation of native species of fish. “Effective awareness and education should be given to the public to protect native freshwater fishes in the country,” he said.
“We do not have adequate number of fish taxonomists. We have to encourage the new generation to focus their studies on taxonomy, which is important to conserve biodiversity,” B Madhusoodana Kurup, KUFOS Vice-Chancellor said.

Many fish species facing extinction, says scientist December 4, 2015


An ecosystem in turmoil

study released earlier this year found that we may soon see a mass extinction of ocean life.

That's alarming, since oceans comprise nearly 70 percent of Earth, provide habitat for more 200,000 known species (and potentially millions more unknown ones) and are integral to all known life on our planet, as well as climate and weather patterns.

The World Wildlife Fund estimates the total value of the ocean's assets at around $24 trillion and said if the ocean were measured as an economy, it would have an annual gross domestic product of $2.5 trillion — the seventh largest economy in the world.

In the United States alone, what the government calls "the ocean economy" — six economic sectors that depend on the ocean and Great Lakes — contributed more than $282 billion to the U.S. GDP and provided more than 2.8 million jobs in 2011, according to the National Oceanic and Atmospheric Administration (NOAA).

Overfishing

Around 90 percent of the world's fisheries are either "fully exploited, overexploited or have collapsed," according to the Monterey Bay Aquarium. More than twice as many fishing boats than fishery stocks can sustain are in the water. "There are simply too many boats chasing a dwindling number of fish," said an aquarium spokesperson.

Organizations such as the Monterey Bay Aquarium publish updated "Seafood Watch" guides that advise consumers on which kinds of fish are being overfished, but these approaches require that customers care enough about the issue to make use of them.

Other approaches toward the regulation of fishing are being implemented, such as cutting fishing seasons short, setting limits on the number of fish a boat can take in a season, or suspending fishing in overharvested areas until populations rebound.

Pollution


Roughly 80 percent of the pollution in the ocean comes from land, according to NOAA.

Pollution from fertilizers, as well as other sources, is creating huge "dead zones" near coastal areas. The chemicals drive down the oxygen content, killing off sea life in the area.

Plastics and other solid garbage in the ocean also create all kinds of problems for sea life. A study published earlier this year estimates that millions of tons of plastic are landing in the ocean annually — enough to litter every foot of coastline in the world with five plastic grocery bags. In recent years there has been a rise in the use of "microbeads" — the tiny grains found in some soaps and personal-care products. 

But even large plastics corrode and break down into smaller and smaller pieces. These pieces can become sponges for toxic chemicals, and they collect in the organs of sea life — including fish that end up on dinner tables. Even large whales can die from the plastic that slowly amasses in their bellies.


polluted air, seen here in Wuhan, China, will make Earth warmer while hurting our health.

This, ladies and gentlemen, is air pollution, captured in 2009 in Wuhan. Our addiction to burning fossil fuels doesn't just contribute to the planet's warming — it's downright terrible for our health. (I would notwant to be a pair of lungs in that city.) Photo by STR/AFP/Getty Images.


Australia — already a pretty warm place — is getting hotter because of climate change. This photo, taken of the outback in 2005, shows what increasingly hot temperatures are doing to landscapes Down Under. Photo by Ian Waldie/Getty Images.

The Earth's dying oceans threatened with mass extinction



Ocean Life Faces Mass Extinction, Broad Study Says JAN. 15, 2015

Mass Extinction Threatens Marine Life and Humans are tje Culprits, Study Bradley Rider January 16, 2015


Threatened & Endangered Species Marine Conservation


13 devastating photos to show your friend who doesn't believe in climate change Robbie Couch NOVEMBER 25, 201515


What Climate Change LooksLike: Dying Pine Forests December 1, 2015

AIRPOCALYPSE NOW CO2 Levels Hit New Historic High 9 NOVEMBRE 2015


The Latest Bananas 6 DICEMBRE 2015




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