النتائج (
الإنجليزية) 2:
[نسخ]نسخ!
The environment and the ecosystem called scientists term the environment on the total circumstances and external factors which living organisms and affect the vital operations of, and are intended ecosystem any area of the nature and content of the living organisms and materials in their interaction with each other and with environmental conditions and generated from exchange between live parts and non-living, and examples of the forest ecosystems and the river and the lake and the sea, and clear from this definition that takes into account all the organisms that make up the environmental community (primates, and protists, plant and animal, respectively) as well as all elements of the environment non-living (soil structure, wind, the length of the day, humidity, pollution etc ...) and takes rights - as one of the eco-system objects - a special place because of the evolution of the intellectual and psychological, is Ctr- to a significant extent - on the ecosystem and the proper disposal cease to maintain the eco-system and not drained. properties ecosystem: - and every ecosystem consists of the following: - objects is live: - a basic inorganic and organic in the environment. organisms: - is divided into two main sections: - a. Organisms self-feeding: It is organisms that can build their own food from inorganic materials simple mediated photosynthesis processes, (plant vegetables), and is considered the primary and main source of all kinds of other organisms of various kinds of these objects as you these organisms to consume large amounts of carbon carbon dioxide through photosynthesis process and you eject the oxygen in the air. b. Living beings is self-feeding: - an organism that can not configure their own food and includes consumer objects and objects analyst, Vaclat weeds such as insects that feed on herbs consumer objects depend on what made the plant and its transformation in their bodies to the different materials build your tissues and their bodies, and called such These objects first consumer because it depends directly on the plant, and animals that feed on these organisms consuming insects also, but called "second consumer" because it depends on the food component of the bodies of insects, which originated in turn of plant origin, the analyst objects they rely on non-self-feeding the disintegration of the remnants of organisms, plant and animal transformation into simple compounds benefit the plants. Examples include bacteria, fungi, and some saprophytic organisms. man and his role in the environment is a human important Amer vital in bringing about environmental change and breach of natural biodiversity, since his presence, which deals with the components of the environment, the more successive years increased control and authority in the environment, especially after that pleased him scientific and technological progress more opportunities to make a change in the environment and in accordance with the increasing need for food and clothing. Thus human deforestation and around the home to farms, factories, homes, and over-grazing consumption grazing intensive, and resorted to the use of chemical fertilizers and pesticides of various kinds, and these are all effective factors in the unbalance ecosystems, reflected the impact in the end to human life as evidenced by the following: - - Forests: the forest ecosystem is strongly related to humans, and include forests nearly 28% of the continents, therefore, degradation or removed happening serious repercussions in the ecosystem, especially in the desired between the ratios of oxygen and carbon balance of carbon dioxide in the air. - Grazing: misuse of rangelands leads to the natural plant, which is accompanied by a deterioration in the soil and climate deterioration, if the sequence deterioration of soil bared and become vulnerable to erosion. - Systems Agricultural, farming is balanced: the rights to convert natural forests into agricultural land replacing the natural ecosystems artificial devices, and replaced the food chains and interrelationships between organisms and distinctive materials ecosystems another pattern of relations between the crop grown and the surrounding environment, use of fertilizers and pesticides to reach to this end, and the biggest mistake rights committed in the understanding of the investment land farming is a belief that he can replace the complex natural relations that exist between environmental factors plants factors artificial simplified, opposed the so Organization laws of nature, which has made the cumbersome and perishable agricultural systems. - wild flora and fauna: led vegetation and fishing is the systematic deterioration to the exposure of a large number of wild plants and animals to extinction, Vokhal environmental balance. the impact of industrialization and modern technology on the environment that the manufacturing and modern technology bad effects on the environment, Vantlaq vapors, gases and waste dumping led to food chains disorder, and reflected the man who ruined the industry environment and made it sometimes inappropriate for his life as evidenced by the following: - - polluting the water Ocean: The aquatic ecosystems directly and indirectly, the lives of human relations, Femiahaa which evaporate fall in the form of rain essential for life on land, and savings from Article plant and animal live is a savings food for all mankind in the future, and the mineral wealth of the utmost importance. - Air pollution: There are several air pollution sources, and it can be said that they include factories, transportation and atomic explosions and radioactive waste, as multiple sources and increasing their numbers day after day, Examples include chlorine, the first carbon dioxide, sulfur dioxide, nitrogen oxide, iron, zinc and lead salts and some organic compounds and radioactive elements. If the proportion of these pollutants in excess of a certain limit in the atmosphere now has clear effects on humans and the environment objects. - Soil contamination: contaminated soil as a result of the use of various fertilizers pesticides and the dumping of industrial waste, and reflected on living organisms in the soil, and thus their fertility and the plants and animals, which will reflect its impact on the human in the end. man in the face of environmental challenges human One organisms that live on the ground, and he needs to oxygen for breathing to carry out vital to its operations, and also needs to be an ongoing resource of energy that draws from organic nutrition who can not get it unless from other organisms plant and animal, and also needs to drinking water for a significant part of Alazmrar can in life. The continuity of life depends clearly on finding urgent solutions to many
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