SUB-DIVISIONS IN BIOBIVERTY

THERE ARE 3 DIVISIONS IN BIODIVERSITY

1. Species diversity 
2. Ecosystem diversity 
3. Genetic diversity 

WHAT ARE THESE DIVISIONS ?

Species diversity is about both the number of different kinds of species in a specific area and how many of each species is in that area.
 Importance: Ecosystem Efficiency 
A study from the University of Maryland suggests that by increasing species diversity in an ecosystem, both the efficiency and the productivity of an ecosystem will increase. The study "increased the [species] richness...such that the feeding success of individuals [was] enhanced." A greater species richness and diversity may cause ecosystems to function more efficiently and productively by making more resources available for other species within the ecosystem.

Ecosystem diversity is the diversity of everything in a specific area, living or nonliving. 
 Ecosystems rely on everything within it - it begins with something such as grass or grains that birds can eat. Then, say, a snake eats the bird. then a lion eats the snake. Without one of those legs, the ecosystem simply would not work.
Imagine a world of nothing but Humans. What would we eat?

Genetic diversity is differences in the genes, for a population, species, or community.
Genetic diversity, one of the three biodiversities, means the total number of genetic characteristics. The academic field of population genetics includes several hypotheses regarding genetic diversity. The neutral theory of evolution proposes that diversity is the result of the accumulation of neutral substitutions. Diversifying selection is the hypothesis that two subpopulations of a species live in different environments that select for different alleles at a particular locus. This may occur, for instance, if a species has a large range relative to the mobility of individuals within it. Frequency-dependent selection is the hypothesis that as alleles become more common, they become less fit. This is often invoked in host-pathogen interactions, where a high frequency of a defensive allele among the host means that it is more likely that a pathogen will spread if it is able to overcome that allele. 

There are many different ways to measure genetic diversity. The modern causes for the loss of animal genetic diversity have also been studied and identified. A September 14, 2007 study conducted by the National Science Foundation found that genetic diversity and biodiversity are dependent upon each other -- that diversity within a species is necessary to maintain diversity among species, and vice versa. According to the lead researcher in the study, Dr. Richard Lankauof, "If any one type is removed from the system, the cycle can break down, and the community becomes dominated by a single species."