Search results
Results from the WOW.Com Content Network
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.
Water pollution may affect either surface water or groundwater. This form of pollution can lead to many problems. One is the degradation of aquatic ecosystems. Another is spreading water-borne diseases when people use polluted water for drinking or irrigation. [3]
Water pollution due to animal waste is a common problem in both developed and developing nations. [14] The USA, Canada, India, Greece, Switzerland and several other countries are experiencing major environmental degradation due to water pollution via animal waste. [50]:
Over 68 published and peer-reviewed studies have been conducted since 2002, out of these studies 15 found direct links to groundwater pollution from animals' waste at CAFOs. [5] Twelve of the studies made indirect links to water pollution and human health while seven found no link at all [6]
Wildfires also may be affecting water quality in some of the region’s most pristine lakes, according to a study published in August by researchers at the University of Minnesota-Duluth.
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.
Further research has shown that many animals and birds carry this parasite, and the major source of water contamination is by humans. [ 10 ] [ 11 ] [ 12 ] Recent concerns point to domestic animals as a significant vector of giardia, with young calves in dairy herds testing as high as 100% positive for giardia. [ 13 ]
The oil can also affect the eggs laid by affected females, often resulting in embryonic death or low birth weight. [2] 5-20 microliters of oil can kill embryos if the egg comes into contact. [1] Eggs laid prior to an oil spill can also become damaged if an affected animal sits on the nest. [4]