The longest and most severe economic downturn ever experienced by the industrialized Western world, the Great Depression began in 1929 and lasted until about 1939. Species diversity: Biodiversity covers the full range of species on earth. What is meant by biodiversity conservation? Species diversity best fits the literal translation: the number of different … This measure is strongly dependent on sampling size and effort. Beta diversity is low if same species of moss occupy the whole mountain side, Ø  Gamma diversity applies to large geographic scale, Ø  Gamma diversity is the rate at which additional species are encountered as geographical replacements within a habitat type in different localities, Ø  Gamma diversity is a species turnover rate with distance between sites of similar habitat or with expanding geographic areas”, Ø  Biodiversity, besides its ecological significance, provides a socio-economic asset to the nation. Endemic species have relatively small ranges, and they tend to be much more vulnerable to human activity than are more widely distributed species, because it is easier to destroy all the habitat in a small geographic range than in a large one. At simplest level: biodiversity is the species richness. There are different ways—different biodiversity indices—that are used by scientists to measure diversity. However, species richness is a measure used to describe biodiversity. many reasons and they can be generally divided into two categories: the importance for ecosystems and for us Biogeographic diversity: diversity observed in geological and geographic history over a large period of time, Ø. Biodiversity also includes: Variability of genus, Variability of varieties, Variability of species, Variability of populations in different ecosystems, Variability in relative abundance of species About 50 million sps. The importance of this definition is that it draws attention to the many dimensions of biodiversity. problem that it is a fundamentally multidimensional. Ø. Biodiversity refers to the variety of plants and animals found on earth. Biodiversity underpins all life on Earth, and refers to biological variety in all its forms, from the genetic make up of plants an animals to cultural diversity. Ø  Biodiversity provides: fuel, timber, fish, fodder, fruits, honey, cereals, medicinal plants etc. Genetic diversity: diversity in the alleles of a single gene, (2). Ø It is the measure of degree of change in species composition along with an environmental gradient Ø Example: Beta diversity is high, if the species composition of moss communities changes successively at higher elevations on a mountain slope. Literally, biodiversity is the many different kinds (diversity) of life (bio-). Most of these are as-yet-undescribed by science. BIODIVERSITY MAY BE MEASURED AS ECOSYSTEM DIVERSITY. This is an important measure of ecosystem health. Just invest little time to admission this on-line revelation how do we measure biodiversity lab answers as Genetic diversity is the total variety of genes within a single species. The dispute over slavery had divided Americans since the founding of the United States. Biodiversity can be measured at many different levels including genetic, species, community, and ecosystem. Landscape diversity: measures the species composition in different landscapes, (8). @. The greater the variety of ecosystem types, the greater number of species that could potentially live there. Biodiversity is often measured as the species count in a given area, be it a single tree, an ecosystem, a landscape or region, or the planet as a whole. Biodiversity is usually plotted as taxonomic richness of a geographic area, with some reference to a temporal scale. Consequently, ecosystem diversity (the total number of ecosystems in a region) can be used to get an idea of its biodiversity. It provides sound information, especially used as environmental health indicators, to determine the status of our biological systems. @. Biodiversity is the variety and variability of genus, species and ecosystem between and within Why measure biodiversity? Biodiversity can include everything from towering redwood trees to tiny, single-cell algae that are impossible to see without a microscope. Are you ready to test your knowledge about all things science? They are related to the species present in a particular region. Hii Tanisha , Biodiversity is usually plotted as taxonomic richness of a geographic area, with some reference to a temporal scale. It is a measure of the variety of organisms present in different ecosystems. Our natural-history museums, for example, contain at least 750 million specimens, the vast majority of which have not been recorded in databases. The measurement of biodiversity 1. The American Revolution (1775–83) won political independence for 13 of Britain’s North American colonies, which subsequently formed the United States of America. The total number of species in the world is about 10 million. Measures of biodiversity vary in scale and purpose. Ø  In India, income from biodiversity is nearly 30% (736.88 billion rupees, 1994-95), Ø  Consumptive use of biodiversity deals with natural products that are consumed directly, Ø  They are goods which do not come under normal circulation of trade, Ø  Example: non timber forest products, Honey collected from forests, Medicine collected from forests, Ø  Indict use is the most significant us of biodiversity, Ø  This value is related primarily with functions of ecosystem, Ø  Biodiversity is very essential for: Ecological balance, Constancy of climatic features and Soil maintenance, Ø  Biodiversity indicates variations of life forms (species, ecosystem, biome), Ø  Biodiversity indicate the health of ecosystem, Ø  Biodiversity is in part a functioning of climate, Ø  Biodiversity provides services like: Air quality and purity, Climate and seasons, Water purification, Pollination and seed dispersal, Prevention of erosion, Ø  Non material benefits of biodiversity are: Spiritual values, Aesthetic values, Education and knowledge systems, Ø  In agriculture biodiversity assist in the recovery of major cultivar when it is under sever attack of disease or pests, Ø  Biodiversity also act as a store house of germplasm of commercially important plants, Ø  About 80% of humans’ food supply comes from 20 kinds of plants, but human uses at least 40,000 species, all of them are the part of biodiversity, Ø  There are more plant products to be discovered from diversity, they are kept hidden in the depth of species richness, Ø  Biodiversity also support in drug discovery for modern diseases, Ø  Most of the drugs which are now in commercial trade are derived directly or  indirectly from biological resources, Ø  About 50% of drugs used in US are derived from biodiversity, Ø  According to WHO, 80% of world population depends on medicines from nature (biodiversity is the integral part of nature), Ø  Many industrial materials are deriving from biological sources. Terrestrial biodiversity is usually greater near the equator, which is the result of the warm climate and high primary productivity. Biodiversity is defined and measured as an attribute that has two components — richness and evenness. Genetic diversity: Genetic variation within species, both among individuals within single population and among geographically separated populations, (2). It measures the variations at ecosystem, species and genetic level. As a consequence, generally accepted biodiversity measurement approaches for application by the business and financial community are not yet available at the product, project, site, supply chain, corporate or sector level. BIODIVERSITY MAY BE MEASURED AS GENETIC DIVERSITY. Species richness [math]S[/math] is the simplest measure of biodiversity and is simply a count of the number of different species in a given area. Some regions have many species. @. Two species richness indices try to account for this problem: Species richness measures the number of species present in a particular region while evenness measures the relative abundance of the different species making up the richness of an area. Biodiversity and species richness are two terms in Ecology. Among this only 2 million are identified so far, @. A wide variety of species exists in an environment. THE MEASURE OF BIODIVERSITY 2. As such, a unique ecosystem may have a distinctive ecological structure with an unusual combination of species that have evolved novel physical adaptations and behaviours that allow them to survive. The City Biodiversity Index (also known as the Singapore Index) is an index created in 2008 that is used by cities around the world such as Montreal, Lisbon, and Helsinki, to measure their biodiversity. It will not waste your time. @. Biodiversity- definition: “variability among living organisms” Bill of Rights and Amendments to the Constitution, Facts and Stats about the Normandy Invasion, Timeline, Facts and Stats of the Attack on Pearl Harbor, Assault Plans, Facts and Figures At Gold, Juno, Sword Beaches During The Normandy Invasion, Executive Branch: President, Vice President, and The Cabinet, Gender Pay Gap – lifetime losses due to wage gap, Assault Plan, Facts and Figures At Omaha Beach During The Normandy Invasion, Assault Plan, Facts and Figures At Utah Beach During The Normandy Invasion, Maps of Allies Invasion Routes and German Defenses on D-Day, Timeline – The Sinking of the USS Indianapolis, Facts and Statistics About Water Scarcity. The islands contain a mix of endemic plants and animals, and it is often cited as an example of a unique ecosystem because of the interplay between the physical and biological forces that affect it. 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