Farmland biodiversity is greatly enhanced by the presence of trees however, farmland trees are declining worldwide, including in north america, central america, and parts of southern europe we show that tree decline and its likely consequences are particularly severe in australia's temperate agricultural zone, which is a threatened ecoregion. Preserving biodiversity also takes place at the molecular level, in the conservation of genetic diversity efforts are being made around the world to collect and preserve endangered organisms’ dna these collections, or gene banks, might consist of frozen samples of blood or tissue or, in some cases, might consist of actual live organisms. The individual components of biodiversity—genes, species, and ecosystems—provide society with a wide array of goods and services genes, species, and ecosystems of direct, indirect, or potential use to humanity are often referred to as biological resources (mcneely and others 1990 reid and miller 1989 wood 1997. Coral reef biodiversity biodiversity is the variety of living species that can be found in a particular place—region, ecosystem, planet, etc coral reefs are believed by many to have the highest biodiversity of any ecosystem on the planet—even more than a tropical rainforest.
Why is biodiversity important biodiversity is the basis of human existence, our life support system ecosystems regulate climatic processes, breakdown wastes and recycle nutrients, filter and purify water, buffer against flooding, maintain soil fertility, purify air, and provide natural resources such as wood, textiles, and of course food. Biodiversity is the term used to describe the variety of life on earth at all its levels from genes to ecosystems, and the ecological and evolutionary processes that sustain itit encompasses all living things, from microbes and single cell algae to marine turtles and whales, and their habitats. 42 discuss the importance of the maintenance of biodiversity the biodiversity found on earth today is the result of approximately 35 billion years of evolution until the emergence of humans, the earth supported more biodiversity than any other period in geological history. Maintaining biodiversity at its present level is impossible if people are going to achieve a reasonable standard of living in the near future (40 marks) 00 / 5 amazon rainforest.
Maintaining multiple ecosystem processes at multiple places and times requires higher levels of biodiversity than does a single process at a single place and time  it plays a part in regulating the chemistry of our atmosphere and water supply. Researchers generally accept three levels of biodiversity: genetic, species, and ecosystem genetic diversity is the variety present at the level of genes genes, made of dna (right), are the building blocks that determine how an organism will develop and what its traits and abilities will be this level of diversity can differ by alleles. The major causes of biodiversity decline are land use changes, pollution, changes in atmospheric co 2 concentrations, changes in the nitrogen cycle and acid rain, climate alterations, and the introduction of exotic species, all coincident to human population growth for rainforests, the primary factor is land conversion. Conservation of biodiversity is protection, upliftment and scientific management of biodiversity so as to maintain it at its threshold level and derive sustainable benefits for the present and future generation. Biodiversity provides numerous ecosystem services that are crucial to human well-being at present and in the future climate is an integral part of ecosystem functioning and human health is impacted directly and indirectly by results of climatic conditions upon terrestrial and marine ecosystems.
The variety of life on earth, its biological diversity is commonly referred to as biodiversity the number of species of plants, animals, and microorganisms, the enormous diversity of genes in these species, the different ecosystems on the planet, such as deserts, rainforests and coral reefs are all part of a biologically diverse earth. The level of biodiversity that can be yielded from organic farming provides a natural capital to humans species found in most organic farms provides a means of agricultural sustainability by reducing amount of human input (eg fertilizers, pesticides) [8. Maintaining biodiversity is essential for organic waste disposal, soil formation, biological nitrogen fixation, crop and livestock genetics, biological pest control, plant pollination, and pharmaceuticals. The dimensions of biodiversity and its relationships to human well-being have been extensively addressed by levin (2000), including both the services that biodiversity supports and the evolutionary genesis of biodiversity together with the ecological. Biodiversity is defined as the variety of plant and animal life in the world, or in a particular habitat a high level of this is usually considered to be important and desirable, so it can be the source of many conflicts.
At present, there is an urgent need to collect data on the ecological quality of freshwater bodies to develop programmes aimed at meeting defined water quality targets by the year 2015, in fulfillment of obligations deriving from the european water framework directive (directive 2000/60/ec. Biodiversity and its value from the department of the environment and heritage, australia, provides many good insights why conserve species from nature magazine provides a good answer to this question. Since 1950, the world's human population has more than doubled, from 25 billion to its present level of 54 billion (prb, 1989) of these people, 77 percent live in developing countries and control about 15 percent of global wealth.
Biodiversity is important in ecosystems because it prevents extinction of species, allows organisms to adapt to changes in the environment and provides a wide range of materials and foods for survival biodiversity is categorized into species diversity, genetic diversity and ecosystem diversity. What's more, if the earth suddenly lost its hearty biodiversity, drugs that have yet to be discovered would also be lost even if we humans could find a way to overcome a catastrophic loss of biodiversity, our existence on earth would certainly be changed. “maintaining biodiversity at its present level is impossible if people are going to achieve a reasonable standard of living in the near future” - discuss this with reference to a tropical biome you have studied (40 marks) biodiversity means the variety of life forms/organisms in an ecosystem, biome or entire planet. “biodiversity” is often defined as the variety of all forms of life, from genes to species, through to the broad scale of ecosystems (for a list of variants on this simple definition see gaston 1996.
Most direct actions to halt or reduce biodiversity loss need to be taken at local or national level suitable laws and policies developed by central governments can enable local levels of government to provide incentives for sustainable resource management. Maintaining biodiversity on earth is important because _____ earth's present rate of species loss may be as much as _____ times higher than at any time in the past 100,000 years 100 the biomass at any given trophic level is accumulated from a much larger toxin-containing biomass ingested from the level below.