Hydrocarbon contamination affects deep-sea benthic oxygen uptake and microbial community composition.
Deep Sea Research Part I: Oceanographic Research Papers 100, 79—87.
Oil and gas are hydrocarbons that we heavily rely on in the 21 st century.
Our high demand not only pushes for increases in production, but it also progresses the frontiers of deep-sea drilling.
But, as more wells are created, we need to better understand how large, unexpected amounts of hydrocarbons oil spills affect the structure and functioning of the deep-sea community.
When undersea wells blowout, toxic link of hydrocarbons can be rapidly released into the environment.
The media presents these blowouts with dramatic images of flora and fauna covered in black tar along coastlines and on the sea surface.
What are rarely shown in glossy photographs, however, are the consequences to the unseen deep-sea.
When oil and gas spills, some of it floats to the surface and some of it forms horizontal layers within the ocean that are then entrained into deep currents and often end up on the seafloor Figure 1.
When the Macondo well blew in 2010, oil in the water column and on the seabed persisted at toxic concentrations for months, causing stress to the organisms living there.
Oil and gas travel along deep-sea currents and interact with sediment communities.
Image: © EPFL Ecole Polytechnique Fédérale de Lausanne This study by Main et al.
Understanding how these micro-fauna react is a very important key to the health of the deep-sea environment.
Impacts of oil industry activities and pollution have commonly been measured by assessing changes in oxygen consumption of the whole sediment community.
The team took uncontaminated sediment cores from the continental shelf and measured the effects of two treatment levels of a water and fraction of crude oil mixture WAF.
They then looked at the sediment community oxygen consumption rates.
Three graphs showing the relationship between the https://bonus-money-jackpot-win.site/4/7879.html of oxygen in the water directly above sediment cores over the span of 36 hours.
The graph on the left has no oil contamination, while the graph on the right has the highest amounts 無料ゲーム接続1001 oil contamination.
The regression lines show that when there is more oil present, the sediment organisms consume more oxygen.
The relationships between amount of oil in the water and mean biomass observed.
The counts show that when there is more oil, less biomass is present.
This study showed that contamination of deep-sea sediments with hydrocarbons will affect the structure and metabolic functioning of the resident microbial communities.
What specific question アトラスゲーム人 assure the benthic bacteria communities shift to is still too difficult to detect due to the clear need for more detailed information about how the physiology of deep-sea benthic organisms respond to the contamination.
There is still a need for a net community-scale response to hydrocarbon contamination that will likely reflect 無料ゲーム接続1001 range of interactive processes that are not yet possible to 無料ゲーム接続1001 />Increasing the understanding of biogeochemical cycling continues to develop and will become more valuable as drilling operations increase in popularity.
With academic backgrounds in oceanography, geology, and environmental education, Sarah has traveled to far reaches of the planet to learn everything she can about our natural world.
While exploring, she dabbles in photography and is rarely found without a book.
She has no plans to stop any time soon.
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