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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.
With primary causes being warming ocean waters, ocean acidity, and pollution. [149] In 2008, a worldwide study estimated that 19% of the existing area of coral reefs had already been lost. [ 150 ] Only 46% of the world's reefs could be currently regarded as in good health [ 150 ] and about 60% of the world's reefs may be at risk due to ...
Overpopulation or overabundance is a state in which the population of a species is larger than the carrying capacity of its environment.This may be caused by increased birth rates, lowered mortality rates, reduced predation or large scale migration, leading to an overabundant species and other animals in the ecosystem competing for food, space, and resources.
Some scholars believe that the projected peak global population of roughly 9-10 billion people could live sustainably within the earth's ecosystems if humans worked to live sustainably within planetary boundaries. [6] [7] [8] The bulk of environmental impacts are caused by excessive consumption of industrial goods by the world's wealthiest ...
Ocean colonization is stated by theorists to be a potential solution to the world's growing population, with 7.78 billion people inhabiting Earth as of May 2020. [32] The BBC claims that 11 billion people is Earth's carrying capacity even after adjusting for consumption behaviours, [10] with the UN predicting this number to be reached by 2100. [10]
Examples of animal overpopulation caused by introduction of a foreign species abound. In the Argentine Patagonia , for example, European species such as the trout and the deer were introduced into the local streams and forests, respectively, and quickly became a plague, competing with and sometimes driving away the local species of fish and ...
The Atlantic Ocean is teeming with life, but for the first time researchers have discovered dead zones in these waters - areas low in both oxygen and salinity - off the coast of Africa. Fish can't ...
Scholar Heather Alberro rejects the overpopulation argument, stating that the human population growth is rapidly slowing down, the underlying problem is not the number of people, but how resources are distributed and that the idea of overpopulation could fuel a racist backlash against the population of poor countries.