Forest ecosystem is the largest terrestrial ecosystems, the biosphere is the most momentous ecosystems. Forests mostly in moist and sub-humid areas, the delivery of the world a broad range of biological species richness. The globe more than 90% of terrestrial Most plants and animals live in the forest, merely the species of tropical rainforest on Earth list for 50% of entire species. makers, mainly high trees, a few shrubs and grass plants, arboreal and consumers living animals for many ascending, such as hornbills, squirrels, monkeys and other glasses. decomposers are bacteria, fungi and actinomycetes. Meanwhile the forest ecosystem is treasure house of human resources, in addition to providing a large number of timber forest, but also can produce rosin, camphor, tung oil, rubber and other products of great economic amount. forest in either a large number of food plants, such as jujube, persimmon, chestnut, kiwi fruit, litchi, etc., there are a lot of fuel plants, such as tea, tung tree, txt Bunge, etc., as well as a crowd of medical resources. which regulates the poise of oxygen and carbon dioxide in the biosphere, improving the ecological environment, conserving water, soil and water, sand-fixing, regulating weather, clean ventilation, eliminate pollution.
Forest the diversity of the system in China
133.7 million hectares of forest area scope was 13.92%, a number of forest types, with various types of coniferous forest, mingled forest, deciduous broadleaf forest, evergreen broad-leaved forest and tropical Lin,beijing massage, and their various secondary type. 210 Chinese assortment of forest formations, bamboo 36 formations, shrubbery and thicket formations 94. In counting, there are many refined to create the timber, shelter, economic forest and Agroforestry type, yet too enriched the diversity of forest ecosystems, which is a function of forest biodiversity. China also has the world's most comprehensive vertical area spectrum of moderate mountains, subtropical mountainous perpendicular region spectrum, the highest northern latitudes tropical montane rain forest, monsoon forest types,shanghai massage, the most exuberant larch species, Picea, Abies, Pinus forest, rare in the world, China has a high biomass of spruce forest in the Brahmaputra valley.
in this diversity types of forests, the habitat of the wealthy diversity of wildlife. According to statistics, China has 6,347 varieties of vertebrates, including mammals, 581 kinds of birds, 1,244 kinds of amphibians, 284 species of reptiles, 376 kinds, most of them live in the forest or forest brim. these beasts, numerous endemic apt China or mainly distributed in China, such as 276 species international, pheasants, China will have 56 species, accounting as 20%, of which 19 species are endemic to China. Other such as colossal panda, golden monkey, white-lipped deer, takin, tufted deer and additional beasts peerless to China.
the status of forest ecosystems
appeared behind approximately 40 billion years ago Earth Ever since the process of extinction has chance an unavoidable fact of life, since that time,toronto escorts, had to survive a few billions of species, almost 500 million species existing only billions of species of the modern survivors, most of them extinct. but all in the quondam have chance extinct by natural processes reason, and today is the human species, no mistrust the main reason for extinction. to the year 2000, about 23,000 kinds of plants on Earth and 1,000 kinds of vertebrates will be extinct. the next 100 years, 30-70% of the plants on the planet will vanish. forest forest making and life of human creatures activity an important role. However, the irrational exploitation has resulted in a premonitory decrement in forest area. According to statistics,shanghai massage, every minute 20hm2 Earth forests have been demolished, only from 1950 to 1985, the world's forest area is reduced by half. By now, China's forest coverage from 60% of the country into a forest coverage rate of more than 17% of the Shaolin countries. For a long time the human role of forests lack of proper understanding of forest purely as an thing apply so that forest ecosystems have been devastated, frequent droughts and floods, many creeks that pays altitude academics, resulting in poall butil, environmental degradation, human pose a threat to sustainable development. Therefore, a correct understanding of the role of forests, rational use and protection of forest resources, has great significance.
intimidated because the human ingredient in today, the cardinal reason for diminution of biological diversity, is deserving to person factors,Why do I must anticipate the lasting ...., for of human dispose, the rate of species extinction namely a thousand times the natural extinction rate. the human clash on biodiversity, mainly in the ecological environment destruction and over-exploitation of species. Ecology break to the environment manifested in two aspects: First, the dispose of forest resources, and second, environmental pollution, deforestation, the destruction of the animal's habitat and food sources, plants are instantly slew, environmental pollution ashore animal and vegetation life have a straight impact.
social factors of biological diversity and social factors decreased rapidly have a magnificent relationship; ① present economy system has stimulated the destroyer of those biological resources, biological resources, or as to who reap colossal profits. As long as they behalf from biological diversity, biological diversity without pay due to costs and amends. These human can be called the This is widespread, a excellent menace to biodiversity. ② benefits of biodiversity conservation, is rarely reflected in the spend - behalf analysis, because the social benefits of protection of biological resources are often elusive, widely distributed, and can no be fully reflected in market amounts. On the contrary, exploitation of natural resources is easy to fathom the benefits derived, and therefore in the cost - benefit thinking underestimated the web benefits of protection, overestimated the web benefits of development, resulting in net disbursement. ⑤ people absence of perception of biological diversity, beads, or the learning of species and ecosystems are too penniless.
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