What are the consequences to a loss of biodiversity?
A loss of biodiversity means species are disappearing which can lead to ecosystems becoming unstable or unbalanced,
Explain how phosphorus is obtained & moves through a food chain.
Rocks release phosphorus through the process of weathering into the soil. Plants absorb phosphate through their roots. Animals, such as rabbits (which are herbivores) eat the plants and obtain phosphate. Carnivores, such as foxes eat the rabbits and obtain phosphates as well.
A park squirrel population has increased rapidly in recent years. Describe two possible conditions that would cause the rapid increase in the squirrel population. Explain how each condition would make the squirrel population grow rapidly.
Two common reasons for an increase in the population of a species are abundant resources and/or a decrease in predators in the area. For the squirrels, an increase in food supply, such as acorns or filberts, will support more squirrels. More food, more squirrels. There may also be a decrease in the number of predators in the area which feed upon the squirrel population. Diseases, trapping, hunting, and human encroachment may be the reasons for a decrease in predators, such as birds of prey, coyotes, wolves, foxes, etc.