This preview shows page 1. Sign up to view the full content.
Unformatted text preview: ed set of physical conditions—to a particular
temperature and moisture regime on land, or a particular
water depth and movement regime in water.
maps, we can now
use remote sensing
data to generate
distribution maps Biotic Factors
! The distribution of a species is
often limited by biotic factors—
interactions with other organisms. ! Interactions including
requirements, and parasitism can
all affect the distribution of a
species. ! Recall competition between
Townsend’s and Hermit Warblers. The Role of History
! The first factor to consider in species distribution is the history of
dispersal. Think of history as evolutionary time… ! Dispersal is the movement of an individual from its place of birth
to the location where it lives and breeds as an adult.
! Think about dispersal of various organisms you have learned about
and how this affects genetics. ! If a species is not found in a particular area, a physical barrier to its
dispersal may exist. What are some of these barriers? The Wallace Line: Barriers to Dispersal
! Wallace realized that the plants and
View Full Document
- Winter '11