A study found higher mortality of old trees at the edges of habitat fragments because the edges of these fragments experienced more wind. More trees were knocked over due to the increased wind. This led to less competition between old trees and young trees for light and water at the edges of these fragments, and, as a result, more young trees were able to grow. Now these fragments have a higher proportion of young trees as compared to non-fragmented habitats. This increase in the proportion of young trees in habitat fragments is due to: A study found higher mortality of old trees at the edges of habitat fragments because the edges of these fragments experienced more wind. More trees were knocked over due to the increased wind. This led to less competition between old trees and young trees for light and water at the edges of these fragments, and, as a result, more young trees were able to grow. Now these fragments have a higher proportion of young trees as compared to non-fragmented habitats. This increase in the proportion of young trees in habitat fragments is due to: Biotic factors only Abiotic factors only Both abiotic and biotic factors