Usually three levels of biodiversity are discussed—genetic, species, and ecosystem diversity. Ecological theory predicts that a complex community formed by a number of species is inherently unstable, guiding ecologists to identify what maintains species diversity in nature. Species diversity is defined as the number of different species present in an ecosystem and relative abundance of each of those species. These plants and animals main range from a small shift to a large shaped. Dominance Indices: Dominance indices are weighted toward the abundance of the commonest species. Every ecosystem contains a unique collection of species, all interacting with each … Beta diversity is “between community diversity” which appears in a range of communities due to replacement of species with the change in Habitat or community. Habitats of a tropical region on the earth are different from habitats of a temperate region. Community diversity is very large. Apart from protected characteristics, there are other important types of diversity, too, like: 1. Ecosystem Biodiversity is further divided into three parts i) Alpha Biodiversity, ii) Beta Biodiversity iii) Gamma Biodiversity. Species diversity refers to the measure of diversity in an ecological community. This can pose a threat to a population if it leads to inheritance of undesirable traits or makes the species more susceptible to disease. 2 Types of Endemic Species: • paleoendemic -confined to just one area. A more diverse ecosystem will have more resources to help it recover from famine, drought, disease or even the extinction of a species. Hence, Species diversity is the product of both species evenness or richness or equitability of a particular region. Every ecosystem contains a unique collection of species, all interacting with each other. Personality 5. A region with several ecosystems may be able to provide more resources to help native species survive, especially when one ecosystem is threatened by drought or disease. Biodiversity is of mainly three types which are above mentioned. Scientists are engaged in the identification and naming of species for the last 250 years. Diversity means different things to different people. The diversity of cell types in the human brain. “Variation existing within a species is called Genetic diversity”. This type of diversity can be found in both the natural ecosystem and agricultural ecosystem. Q&A: Covid-19 pandemic highlights urgent need to change Europe’s food system, Why the Songbird’s Serenade Is Going Off-Key, The number of genes in drosophila melanogaster =. Genetic diversity is all the different genes contained in all individual plants, animals, fungi, and microorganisms. Species diversity and ecosystem diversity, along with genetic diversity, are the three levels of biodiversity on the earth. A small forest would have greater species diversity than a cornfield because species diversity tends to increase with diversity of habitats. A new hypothesis, based on differences in the rates at which populations of competing species approach competitive equilibrium (reduction or exclusion of some species), is proposed to explain patterns of species diversity. Species Diversity. Genetic diversity describes how closely related the members of one species are in a given ecosystem. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. A recent estimate suggests that the number of identified eukaryote species, about 1.5 million species, account for less than 20 percent of the total number of eukaryote species present on the planet (8.7 million species, by one estimate).