Which of these following scenarios is caused by the Allee effect?Corals rely on external fertilization when gametes (sperm and eggs) are released into the sea in large quantitiesand have to meet at random chance. When coral densities drop due to coral bleaching and die back, externalfertilization becomes inefficient, few zygotes form, and coral populations further decline or go extinct.After a big disturbance in forests, such as fire, many seeds germinate and seedlings compete for space, lightand resources. K-selected species produce fewer, but larger seeds that are initially outnumbered by thenumerous sEeds and resulting seedlings of r-selected species. The initial advantage of r-selected species ofOccupying more locations and therefore by random chance also better locations, is later overcome by theK-selected species higher competitive ability. Therefore, for the first years to decades, r-selected speciesdominate areas that experienced severe disturbances, while in mature forests, K-selected species dominate.The chytrid fungus devastates Amphibian populations world-wide. Smaller populations are more likely to beextirpated when the pathogen is introduced, because they have less genetic variability and therefore a smallerlikelihood to have individuals that are naturally resistant to the fungus.The emerald ash borer, a beetle whose larvae live and feed under the bark of ash trees and eventually kill-offthe tree by girdiing it while feeoing, is decimating ash trees Ash trees occurring in medium to high densitiesexperience particularly high attack rates and are likely to be wiped out completely, while isolatedindividual ashtrees that have no ash nelghbors heve a higher chandce to be misseo by the ash borer.and suryive.

The Allee effect is a biological phenomenon characterized by a relationship between population size…

Answered: Which of these following scenarios is…

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Biology

Which of these following scenarios is caused by the Allee effect?

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter44: Population Ecology

Section: Chapter Questions

Problem 2DAA: Iguana Decline In 1987, Martin Wikelski began a long-term study of marine iguanas in the Galpagos...

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