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Seafloor Marine Life Face Major Threat from Climate Change

Posted in Science on 19th Jan, 2014 10:59 PM by AlexMuller

Researchers say their results show that even the most remote deep-sea ecosystems are not safe from the impacts of a warming world. They say the weight of the marine creatures that will be lost is greater than the combined weight of every person on Earth.

The scientists predict that seafloor-dwelling organisms will decline by over 5 percent globally and by 38 percent in the North Atlantic over the next century. This is because there will be a reduction in their food source, the plants and animals living at the ocean surface which nourish deep-sea communities when they die and sink to the depths.
The team has found a direct link between climate change and the loss of life on the sea floor. The surface-dwellers will themselves be threatened by a dwindling nutrient supply, triggered by climate impacts such as the slowing of the circulation of the world’s oceans and increased separation between layers of water, known as stratification, as a result of warmer and rainier weather.
In the study, led by the UK’s National Oceanography Center, the team used the latest climate models to predict changes in food supply throughout the oceans. They then applied a relationship between food supply and biomass calculated from a huge global database of marine life. The results of the study are published this week in Global Change Biology.
The changes in seafloor communities are expected despite the fact that they live on average 4 kilometers (2.5 miles) beneath the ocean surface. The lead author, Dr. Daniel Jones, says: “There has been some speculation about climate change impacts on the seafloor, but we wanted to try and make numerical projections for these changes and estimate specifically where they would occur.

Tags: climate changeglobal warmingCO2greenhouse gasesnatureenvironmentseaoceanmarine lifefish

Read original article » Back to category


Author: Guest
Posted: 2014-01-20
It is important to accurately assess the impact of global warming and document it very well. That see floor is also affected may not be so surprising as most life is in one way or another
1 Replies
Author: Guest
Posted: 2014-01-20
The evidence is staggering. The changes will vary across the world, but most areas will experience damage. Reply
Author: Guest
Posted: 2014-01-20
There many problems experienced by marine life. recently scientists asked this question "Can sea life evolve fast enough to cope with ocean acidification due to human activity?" Unfortunately, it seems that not all animals can evolve or adapt to changing conditions at the same rate; some probably can't adjust at all. Reply


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