Explain relationships in ecosystems - Middle School Life Science

Card 1 of 160

0
Didn't Know
Knew It
0
1 of 2019 left
Question

Atlantic salmon migrate to rivers in New England to reproduce and to the coast of Greenland to feed. Which of these scenarios could cause a decrease in salmon populations due to competition?

Tap to reveal answer

Answer

The answer is "Limited food resources in Greenland"

Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.

Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected. One species typically uses the other for a purpose other than food. Parasitism is a symbiotic relationship in which one species (the parasite) benefits while the other species (the host) is harmed.

A type of relationship that is not symbiotic but still seen often in ecology is the Predator-Prey relationship. The predator prey relationship consists of the interactions between two species and their consequent effects on each other. In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. Usually these populations go through cycles.

← Didn't Know|Knew It →