Moving and Flowing As you have learned about the biosphere, biomesand specific ecosystemswe have been mentioning the cycles all around you.
Conversion of rich biodiversity site for human settlement and industrial development v. Destruction of coastal areas vi. Uncontrolled commercial exploitation One of the primary causes of loss of biodiversity is habitat destruction. The main causes for the same are listed below: Extraction including mining, fishing, logging and harvesting iii.
Developmental activities including human settlement, industry and associated infrastructure Millions of hectares of forest area is lost due to illegal encroachment of forest land.
Forest land is also lost due to construction of river valley projects, introduction of transmission lines and roads, etc. Change in forest composition and quality can lead to decline in primary food species for wildlife.
Fragmentation is the process of division of a population into several small groups. Habitat loss and fragmentation leads to formation of isolated, small and scattered populations which are susceptible to inbreeding, depression, high infant mortality and eventually possible extinction.
Introduced species are responsible for many recorded species extinctions, especially on islands. In these isolated ecosystems, a new predator, competitor or pathogen can rapidly endanger species that did not evolve simultaneously with the newcomer. Several forest, fisheries and wildlife resources have been over-exploited to the point of extinction.
A few cases are mentioned below as a point in case. Poaching of wild animals The Tiger, Elephant, Rhinoceros has resulted in their extinction. Population pressures adversely affect the forest resources on which the local communities depend while having a negative impact on biodiversity.
Contamination affects the food chain.
A point in case is marine pollution from non-point sources that ruins estuaries and coastal seas throughout the world. Pesticides used to control agricultural pests have shown to negatively impact birds due to severe air pollution in Spain.
Write about energy flow in an ecosystem Energy is an essential requirement for all living organisms.
Solar energy is the only source of energy for the Earth. Solar energy is transformed to chemical energy by photosynthesis in plants primary producers. Some amount of energy is used by the plant for growth and the remaining is transferred to consumers by the process of eating.
Thus energy enters the ecosystem through photosynthesis and passes through different feeding levels tropic levels The flow of energy through an ecosystem follows two laws of thermodynamics: Energy for an ecosystem comes from the sun. It is absorbed by plants where it is converted and stored as chemical energy or solar energy is converted into chemical energy.
Whenever energy is transferred between tropic levels, loss of energy takes place through respiration, running, hunting, etc. Describe aquatic ecosystem Aquatic ecosystem deals with water bodies. Types of organisms found in aquatic environment depend on salinity of water salt content.
Types of aquatic life zones: Fresh water life zones Ponds, Streams, Rivers, Lakes 2. Salt water life zones. Oceans and Estuaries Pond ecosystems i. Pond is temporary, only seasonal ii. It is a stagnant freshwater body iii. It is easily polluted due to limited amount of water. Structure and function Examples of abiotic components are temperature, light, water, organic and inorganic compounds.
Biotic components are comprised of i. These include green photosynthetic organisms. They are of two types:Buy Barron's AP Environmental Science: Read Kindle Store Reviews - regardbouddhiste.com Career Outlook. Our online environmental science programs equip you with the skills you need to pursue or advance your career in a wide array of roles, including environmental scientist, geospatial analyst, geographic information systems specialist, protection .
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This is a glossary of environmental science.. Environmental science is the study of interactions among physical, chemical, and biological components of the regardbouddhiste.comnmental science provides an integrated, quantitative, and interdisciplinary approach to the study of environmental systems.
Biosphere: Biosphere, relatively thin life-supporting stratum of Earth’s surface, extending from a few kilometers into the atmosphere to the deep-sea vents of the ocean. The biosphere is a global ecosystem composed of living organisms (biota) and the abiotic (nonliving) .