Biology

Biology, 11.10.2019 18:00, emj70

Kimberly is observing the behavior patterns of a bird species in the wild. during her observational period, a forest fire sweeps through the environment in which the bird species lives. which of the following is a testable hypothesis that can be made following the forest fire?

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Biology, 28.06.2019 18:00, nsuleban9524

The drastic decline in the number of kirkland's warblers, prompting the u. s. forest service to include the kirtland’s warbler on the list of endangered species in 1967 under the endangered species preservation act of 1966 was a) eggshell thinning due to ddt use. b) habitat loss as young jack pine forests matured. c) competition for food among the other northern bird species. d) the increase in wildfires that destroyed the developing jack pine foreststhe u. s. forest service notes that the fire suppression policies of the last century were as damaging to the kirkland's warbler population as ddt was to the bald eagle. how can extinguishing a wildfire be a listing factor to this bird's populations? all but one could apply.a) fire removes plants that compete with jack pines for forest space. b) fire suppression had allowed the jack pine forests to become too old for the birds to use as nesting sites. c) fires effectively remove competing bird species the area. without periodic wildfires, kirkland's warbler is outcompeted for food. d) kirkland’s warblers nest in stands of young jack pines. heat from the wildfires is needed to open cones to release seeds to keep rejuvenating young tree stands.

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Biology, 30.07.2019 11:30, alishakira690

Studies indicate that global warming has caused a shift in the migratory patterns of some bird species. such changes in migration patterns may have adverse effects on some bird populations because a) scientists are no longer able to study the migratory habits of these birds. b) bird species from the south have started flying north during winter, reversing the original trend. c) the birds may arrive too early or too late to take advantage of the peak numbers of their insect preys. d) some species of birds have stopped migrating due to more suitable conditions at their place of origin.

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Biology, 31.08.2019 23:30, kaylaanndupree

Suppose a bolt of lightning starts a fire in a forest. the fire sweeps through the forest and burns away accumulations of brush and deadwood. what is the most likely effect of the fire on the forest community?

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Biology, 29.10.2019 16:31, fruitsnaxFTW5535

In a forest ecosystem, a species of bird was introduced. the birds had few predators, and for a period of time its population rose steadily and then roughly leveled off. which of the following conclusions provides the best explanation for this phenomenon? a. a predator of the birds entered the ecosystem, causing the bird population to level off. b. migration of birds into the ecosystem began to decline, and emigration began to increase. c. another species of bird was introduced, and the two species competed for nesting sites and food. d. the ecosystem reached its carrying capacity, and was not able to support continued population growth.

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Kimberly is observing the behavior patterns of a bird species in the wild. during her observational...

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