Kaziah Hatley 6th /Green
Tundra
Tundra food web
Commensalism
The relationships formed between organisms that interact in nature are referred to by ecologists as symbiotic relationships. One type of symbiosis is called commensalism. In commensalism, one organism benefits from the relationship while the other species involved neither benefits nor is harmed.
Mutualism
Mutualism (biology) Hummingbird hawkmoth drinking from Dianthus. Pollination is a classic example of mutualism. Mutualism is the way two organisms of different species exist in a relationship in which each individual benefits from the activity of the other.
Parasitism
In biology/ecology, parasitism is a non-mutual symbiosis relationship between species, where one species, the parasite, benefits at the expense of the other, the host. Traditionally parasite (in biological usage) referred primarily to organisms visible to the naked eye, or macroparasites (such as helminths).
Negative & Positive impacts on the Environment from humans
Positive: air pollution