Human activity affects ecosystems in a wide variety of ways, but it primarily does so through agriculture, habitat destruction, water use and fishing. Whenever humans enter a habitat, they tend to reshape it to fit their own needs, destroying the resources that other animals use, which drives them out. The overuse of water drains natural aquifers and alters the local water table, and pollution can negatively affect wildlife populations.Know More
Fishing is one area in which human activity can have massive effects on an ecosystem. Humans often put extreme pressure on apex predator species, such as tuna. When the numbers of these predators dwindle, the lesser predators that they consume grow in number, which then puts pressure on the species further down the food chain. Additionally, industrial fishing operations can damage habitats and kill unrelated species that are caught along with the targeted fish.
Humans also affect the environment through pollution, and these changes can be widespread. Increases in carbon dioxide and other greenhouse gases have raised global temperatures, and these increases can alter sea levels and weather patterns. Just a few degrees of change can damage fragile ecosystems by wiping out key flora or altering animals' reproductive cycles, and the fact that these gases can affect the environment for decades if not centuries ensures that their impact is long-term and widespread.Learn more about Earth Science
Eutrophication is the process of enriching an ecosystem with nutrients, primarily nitrogen and phosphorous. It can occur naturally in aging lakes. Humans can also introduce these nutrients into an ecosystem, at which point it is called artificial eutrophication.Full Answer >
A forest is a highly evolved, complex and constantly changing ecosystem made up of a variety of living and nonliving things, with trees making up the majority of living things. More animals live in the forest than in any other habitat on Earth. Forests contain more than 50 percent of the world's land plant and animal population.Full Answer >
Abiotic factors are the non-living parts of an ecosystem. The abiotic factors of Antarctica are its low temperatures, small amount of precipitation and polar ice sheet. Abiotic factors work with the biotic, or living, factors to shape the ecosystem.Full Answer >
Jaguars do not have any natural enemies because they are at the top of their food chain, however, humans are considered to be an enemy of the jaguar because they kill jaguars for fur and through habitat destruction. Jaguars are powerful animals that weigh between 120 to 300 lbs.Full Answer >