Question

Populations of blue-winged warblers, a type of bird, migrate south in the winter and return to Canadian breeding grounds in the spring. As global temperatures have increased due to climate change, spring has started arriving in the warbler's breeding grounds earlier in the year, before the warblers return. Warblers now arrive at their breeding grounds too late to select ideal nesting sites and to feed on important early-spring food sources. How are populations of blue-winged warblers most likely to be affected by the earlier arrival of spring?

opulations of blue-winged warblers most likely to be affected by the earlier arrival of spring?

A.
Populations will increase since warmer temperatures are generally beneficial to survival.
B.
Populations will decline since individuals will be less likely to successfully reproduce.
C.
Populations will go extinct since the warblers will stop migrating to breeding grounds.
D.
Populations will be unaffected since most species can quickly adapt to effects of climate change.

Answer 1

it will have to be B. Populations will decline since individuals will be less likely to successfully reproduce. because they will not be able to breed with other birds on the breeding grounds.

Answer 2

The correct answer would be option B.

Due to the early arrival of springs, the warblers could not find ideal sites for nesting.

In addition, the early-spring food sources also get depleted by the time they reach breeding grounds.

Consequently, the reproduction and survival rates of the warblers would decrease.

Ultimately, the population size of the warblers would decrease.