Search results
Results from the WOW.Com Content Network
Overexploiting sea otters resulted in cascade effects which destroyed kelp forest ecosystems. Overexploitation of species can result in knock-on or cascade effects. This can particularly apply if, through overexploitation, a habitat loses its apex predator. Because of the loss of the top predator, a dramatic increase in their prey species can ...
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]
Poaching continued, leading the government to declare the Japanese serow a "Special Natural Monument" in 1955, [k] [10] at which point overhunting had brought its numbers to 2000–3000. [19] Populations grew as the police put an end to poaching, and post-War monoculture conifer plantations created favourable environments for the animal.
For premium support please call: 800-290-4726 more ways to reach us
The Summary. A new study found that some members of an octopus species hunt cooperatively in groups with fish. Video shows octopuses punching their companion fish to keep them on task and ...
The percentage of megafauna on different land masses over time, with the arrival of humans indicated. Extinction of animals, plants, and other organisms caused by human actions may go as far back as the late Pleistocene, over 12,000 years ago. [57] There is a correlation between megafaunal extinction and the arrival of humans.
The main drivers of the species' extinction were habitat destruction and overhunting. On top of anthropogenic activities, the deforestation that put passenger pigeons at risk was also catalyzed by the invasive chestnut blight, which greatly reduced the number of American chestnut trees in North America. [25]
Circles, Xs, and dots in various colors identify which trees are to be cut, which ones are hazards, and which ones should be left alone. They also mark property boundaries and environmental concerns.