What is spatial population distribution?
Population distribution denotes the spatial pattern due to dispersal of population, formation of agglomeration, linear spread etc. Population density is the ratio of people to physical space. It shows the relationship between a population and the size of the area in which it lives.
What is the dispersal dispersion of a population?
The dispersion pattern (distribution pattern) of a population describes the arrangement of individuals within a habitat at a particular point in time, and broad categories of patterns are used to describe them. The three dispersion patterns are clumped, random, and uniform (figure 5.1. a).
What are the 3 types of population dispersion?
Patterns of Dispersion
- Figure 1: Clumped dispersion of individuals. The average number of individuals per square is 6.25, the variance is 125, and the ratio of the two is 20.
- Figure 2: Uniform dispersion of individuals.
- Figure 3: Random dispersion of individuals.
What is spatial distribution in human geography?
A spatial distribution is the arrangement of a phenomenon across the Earth’s surface and a graphical display of such an arrangement is an important tool in geographical and environmental statistics.
What affects the spatial distribution of a population?
Spatial distribution of individuals belonging to one population or of populations belonging to one metapopulation are affected by resource availability and habitat fragmentation, and are created by natural factors such as dispersal, migration, dispersion, and human-caused factors such as habitat fragmentation.
What are the different methods of population dispersal?
These are known as uniform, random, and clumped dispersion patterns, respectively. Uniform dispersion. In uniform dispersion, individuals of a population are spaced more or less evenly.
What are the different types of population dispersion?
Individuals of a population can be distributed in one of three basic patterns: they can be more or less equally spaced apart (uniform dispersion), dispersed randomly with no predictable pattern (random dispersion), or clustered in groups (clumped dispersion).
What are some examples of population dispersion?
In uniform dispersion, individuals of a population are spaced more or less evenly. One example of uniform dispersion comes from plants that secrete toxins to inhibit growth of nearby individuals—a phenomenon called allelopathy.
What is spatial distribution in ecology?
The spatial distribution of trees is a result of many ecological processes and can affect the degree of competition between neighbouring trees, tree density, variability in size and distribution, regeneration, survival, growth, mortality, crown formation and the biological diversity within forest communities.
What is spatial distribution?
Spatial distribution is the study of the relationship between objects in physical space. Where do things occur, and how do they relate to each other? In general, we expect data points to form three basic patterns. A uniform distribution occurs when data points are equally and evenly spaced out. For humans, this may imply some sort of planning.
How does population size affect the spatial distribution of populations?
The spatial distribution of populations changes with population size. Growing populations expand over a larger area as individuals in the high-density core disperse to the fringe of the population or colonize new patches.
What does index of dispersion tell us about spatial distribution?
M.K. Borregaard, G. Nachman, in Encyclopedia of Ecology, 2008 Though the index of dispersion indicates whether a population is evenly, randomly, or patchily distributed in space, it does not explicitly reveal information about the underlying spatial distribution.
How important are local population processes for plant dispersal?
Local population processes can be as important for the spatial dynamics of plants as dispersal. However, because demographic modeling techniques are more well-known than dispersal models, we will only briefly summarize key demographic models.