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Human activities affect marine life and marine habitats through overfishing, habitat loss, the introduction of invasive species, ocean pollution, ocean acidification and ocean warming. These impact marine ecosystems and food webs and may result in consequences as yet unrecognised for the biodiversity and continuation of marine life forms. [3]
An invasive species is an ... within the ocean; new means of species transport include hull fouling and ballast water transport. ... ecosystems. [89] Invasive species ...
Concern among experts has grown since the 2000s that some organisms have adapted to live on [139] floating plastic debris, allowing them to disperse with ocean currents and thus potentially become invasive species in distant ecosystems. [140]
Healing the ecosystem so the otters could come back had the win-win effect of helping manage an invasive species. "The sea otters, they're like an assistant manager for us," she said.
Human activities affect marine life and marine habitats through overfishing, habitat loss, the introduction of invasive species, ocean pollution, ocean acidification and ocean warming. These impact marine ecosystems and food webs and may result in consequences as yet unrecognised for the biodiversity and continuation of marine life forms. [58]
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.
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. [139] Introductions of non-native species into new areas have brought about major and permanent changes to the environment over large areas.
According to the Baykeeper organization, 97 percent of the organisms in the San Francisco Bay have been compromised by the 240 invasive species that have been brought into the ecosystem. [26] Invasive species in the bay such as the Asian clam have changed the food web of the ecosystem by depleting populations of native species such as plankton.