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An invasive species is a species not native to a particular location which can spread to a degree that causes damage to the environment, human economy or human health. [19] In 2008, Molnar et al. documented the pathways of hundreds of marine invasive species and found shipping was the dominant mechanism for the transfer of invasive species in ...
Ballast water discharges are also believed to be the leading source of invasive species in U.S. marine waters, thus posing public health and environmental risks, as well as significant economic cost to industries such as water and power utilities, commercial and recreational fisheries, agriculture, and tourism. [2]
While marine pollution can be obvious, as with the marine debris shown above, it is often the pollutants that cannot be seen that cause most harm.. Marine pollution occurs when substances used or spread by humans, such as industrial, agricultural and residential waste, particles, noise, excess carbon dioxide or invasive organisms enter the ocean and cause harmful effects there.
The team of 86 researchers from 49 countries released a four-year assessment of the global impacts of some 3,500 harmful invasive species, finding that economic costs now total at least $423 ...
A sea otter eyes its lunch, one of two invasive European green crabs it was able to retrieve underwater. Photo taken in 2011 in Moss Landing, CA. Green crabs are originally from Europe and arrived ...
This widely spread invasive species is often distributed by ship ballast water. [6] C. maenas is a voracious predator to many species such as worms, mollusks, oysters, and clams. The competitiveness and efficiency of this species out-competes native crabs and lobsters.
According to a study by Cornell University, the birds cause $800 million in agricultural damage each year, and federal aviation officials say that they have caused millions of dollars in damage to ...
Invasive species are defined by the U.S. Department of Agriculture as non-native to the specific ecosystem, and whose presence is likely to harm the health of humans or the animals in said system. [140] Introductions of non-native species into new areas have brought about major and permanent changes to the environment over large areas.