Biodiversity Essay. Page 1 of 50 - About essays. Biodiversity And Its Effects On Biodiversity Words | 7 Pages. Abstract. Biodiversity is a variety of life and it is important to maintain biodiversity because it provides everyone’s needs for food source, water source and shelter. Currently, Georgia Gwinnett College expanding with 22/2/ · Biodiversity Essay ( words) Biodiversity, also referred to as Biological Diversity, is the variety of flora and fauna present in a particular habitat or on Earth as a whole. It has largely replaced the more clearly defined terms – species richness and species blogger.comted Reading Time: 8 mins 10/8/ · Loss of Biodiversity Essay – 2 ( Words) Extinction is an inexhaustible part of the nature, for example dinosaurs are extinct beings. But their end was due to the process of natural development in which more successful species replaced the less successful blogger.comted Reading Time: 7 mins
Essay on Biodiversity: Top 8 Essays | India | Biodiversity | Biology
Essay 1, essay about biodiversity. Introduction to Biodiversity: The term biological diversity or biodiversity refers to the variety of life forms and habitats found in a defined area. The term biodiversity was coined by W. Rosen Diversity characterizes most living organisms, the our earth supports something like 5 to 10 million species of plants and animals IUCN, which have been the result of 3 billion years of evolution involving mutation, recombination and natural selection.
Biodiversity is an umbrella term covering diversity at genetic, species and ecosystem level. Essay 2. Levels or Components of Biodiversity: Biodiversity is said to have three hierarchical levels, or components:. The diversity of ecological complexes or biotic communities found in a given area. Indian ecosystem diversity is described at each of the three levels biogeographical region, biotic province and biome.
Largest of identified ecosystems has been the biogeographical zone. The vast area covered by biogeographical zone contains a wide diversity of smaller units called biotic provinces. Finally, within each biotic province, various kinds of biomes are distinguished.
Biome classification broadly follows commonly used terminology, distinguishing between forests, essay about biodiversity, grasslands, wetlands, deserts, and other such ecosystems on the basis essay about biodiversity their physical appearance and dominant biotic or abiotic element. The enormous range of terrestrial and aquatic environments on earth has been classified into number of ecosystems.
Ecosystems differ not only in the species composition of their communities but also in their physical structures including the structures created by organisms. Species diversity refers to variety of species in a region. Number of species per unit area is called species richness. Eveness or equitability differs due to difference in number of individuals in an area. With increase in area, number of species increase.
Usually, species diversity increases, if species richness is higher. Somehow, number of individuals among species may differ. This may lead to differences in essay about biodiversity or equatibility. This also results to change in diversity. Some examples are as under Fig. i Suppose in an area -1, there are three species of bird. Out of them two species bear only one essay about biodiversity each.
Third species has four birds. ii In area -2, there are 3 species each having 2 birds. This area represents greater evenness. It is more diverse than area, essay about biodiversity. The diversity of populations of organisms which interbreed or are reproductively isolated from other such populations.
Species are the most commonly used unit describing biodiversity. Comparisons of the diversity found in different countries or ecosystems, for instance, are almost always based on species number.
According to investigations into Amazoruan rainforest canopy, worldwide, some 5 to 30 million species are believed to exist. Nearly 1. Species diversity has essay about biodiversity been used as an indicator of the conservation significance of an area. The diversity of basic units of hereditary information genes which are passed down the generations, found within a species is genetic diversity. Genetic diversity refers to variation of genes within species.
The genetic diversity within a species is expressed essay about biodiversity many terms, subspecies, breeds, races, varieties and forms. Genetic information is stored in genes. In Mycoplasma, there are about genes; in Escherichia coliin Drosophila melanogasterin Oryza sativa 32, and in Homo sapiens the number of genes ranges in between and Due to genetic diversity, population adjusts in its environment and responds to natural selection.
More the genetic diversity in an organism, better is the adaptation to changed environmental conditions.
A sort of uniformity is obtained with lower genetic diversity. This happens with large essay about biodiversity of genetically similar crops. This condition is considered to be better for increased production of crops.
However, it may create a problem when essay about biodiversity are attacked by insects or fungal disease. Genetic variation leads to evolution of new species speciation. Genetic variations occur to varying degrees in most species of plants and animals. Essay about biodiversity is high genetic variation in Indian rhinos but little in cheetahs. This variety of genetic material within species has enabled distinct species to evolve through natural selection, essay about biodiversity.
Essay 3. Community Diversity: This demarcates three levels of components:. It represents number of species in a given habitat. Differences can be observed in species composition of communities along different environmental ranges like moisture gradient, altitudinal gradients, etc. Beta diversity will be always high with increase in heterogeneity in habitats in a region or with higher dissimilarity found between communities, essay about biodiversity. The rate of turnover or replacement of species while moving from one habitat to another within a given geographical area, essay about biodiversity.
For instance the differences in species composition between a coral reef and the adjoining intertidal zone would be termed as beta diversity. This term is used for the essay about biodiversity of turnover or replacement of species between similar habitats in different geographical areas. For example, the differences in species; composition between the coral reef in the Gulf of Kutch and in the Andaman Islands would be called as gamma diversity. Diversity of habitats are the total landscape or geographical area is called gamma diversity.
Essay about biodiversity 4. Gradients of Biodiversity: Change in latitude or altitude leads to change in biodiversity, essay about biodiversity. Biodiversity increases from poles to equator from high to low latitude. Number of species increase in area with favourable environmental conditions e. in tropical rain forests. In temperate regions, plants grow for shorter period due to adverse climatic conditions. For example vascular plants in tropic rain forests are per 0.
It has been found to be true with other taxonomic groups like arts Fig. On mountains, decrease in species diversity takes place from lower to higher altitude. Higher seasonal variations and fall in temperature leads to reduction in biodiversity with m increase in altitude leads to temperature drop of about 6. Essay 5. Natural extinction is part of the overall evolutionary process.
The present wave 0. There is an ecological crisis which has threatened the whole life support system and the large number of habitats and species, both plant and animal, have been progressively on the decline.
Thus humankind is involved in what has been called specie. If genocide is a crime, specie is equally so. Charka the physician was asked by his teacher to get him a plant that was quite useless, he returned empty handed saying that there was no such plant. One cannot imagine asituation, if Penicillium had essay about biodiversity eliminated from earth before humankind made use essay about biodiversity it as an antibiotic or if Cinchona become extinct before quinine was discovered as a cure for malaria, essay about biodiversity.
It is, therefore, in our interest to conserve our plant as also animal and micro-organism wealth. There is a growing realisation throughout the world about the urgent need to conserve the biological diversity. Genetic diversity is the amount of genetic variability among individuals of a single species as also between species. Ecosystem diversity or Ecological diversity species richness is the number of species in a community of organisms.
The Indian regions 8°°N and 60° The total plant wealth of the country includes not only the usually large showy flowered vascular plants, but a large essay about biodiversity of non-flowering plants such as ferns, liverworts, algae and fungi. The endemic species and genera are largely concentrated in two principal biogeographical regions of India i. Himalyas about 42, species and Pennisulai India about 2, species.
Essay about biodiversity diversity informs the number of riches, trophic levels and ecological systems like energy flow, food webs and recycling of nutrients. Diverse communities are more stable and productive. They can tolerate environmental stresses like prolonged dry conditions. Number of habitats and ecosystems observed in an area is also a criterion for measuring biodiversity, essay about biodiversity. Some important ecosystems are savarmas, rain forests, deserts, lakes, wetlands and oceans, essay about biodiversity.
There is a much essay about biodiversity of fauna and flora in the oceans. India has a coastline of about 6, km. with an area of 20, 13, sq. of exclusive economic zone EEZ and a shelf area of 4,52, sq. The main reason for this remarkable diversity of life forms in a single country is the great diversity of ecosystems, which it has supported down the ages.
Equally important are the micro-organisms like fungi and bacteria which are very important component of biosphere in as much as they are responsible for degradation of the dead biomass and release of nutrients, which are assimilable by plants and animals and enrich soil, as also form humus.
Essay on Biodiversity
, time: 1:18Essay on Biodiversity: 8 Selected Essays on Biodiversity
9/9/ · Essay on Biodiversity– Biodiversity is the presence of different species of plants and animals on the earth. Moreover, it is also called biological diversity as it is related to the variety of species of flora and fauna. Biodiversity plays a major role in maintaining the balance of the blogger.comted Reading Time: 3 mins Biodiversity loss is becoming an unpleasant pattern in today's world. Additionally, there are three levels of biodiversity; species diversity, ecosystem diversity, and genetic diversity. Firstly, species diversity is categorized as the volume of all living things. Secondly, ecosystem diversity is the region/habitat in which the species thrive 10/8/ · Loss of Biodiversity Essay – 2 ( Words) Extinction is an inexhaustible part of the nature, for example dinosaurs are extinct beings. But their end was due to the process of natural development in which more successful species replaced the less successful blogger.comted Reading Time: 7 mins
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