File Name: biotic and abiotic components of ecosystem .zip
An organism is always in the state of perfect balance with the environment. The environment literally means the surroundings.
The environment refers to the things and conditions around the organisms which directly or indirectly influence the life and development of the organisms and their populations. Organisms and environment are two non-separable factors. Organisms interact with each other and also with the physical conditions that are present in their habitats.
The concept of ecosystem was first put forth by A. Tansley Ecosystem is the major ecological unit. It has both structure and functions. The structure is related to species diversity. The more complex is the structure the greater is the diversity of the species in the ecosystem. The functions of ecosystem are related to the flow of energy and cycling of materials through structural components of the ecosystem.
According to Woodbury , ecosystem is a complex in which habitat, plants and animals are considered as one interesting unit, the materials and energy of one passing in and out of the others. According to E. Odum, the ecosystem is the basic functional unit of organisms and their environment interacting with each other and with their own components.
An ecosystem may be conceived and studied in the habitats of various sizes, e. All the ecosystems of the earth are connected to one another, e. A complete self-sufficient ecosystem is rarely found in nature but situations approaching self-sufficiency may occur.
The structure of an ecosystem is basically a description of the organisms and physical features of environment including the amount and distribution of nutrients in a particular habitat. It also provides information regarding the range of climatic conditions prevailing in the area.
From the structure point of view, all ecosystems consist of the following basic components:. Ecological relationships are manifested in physicochemical environment. Abiotic component of ecosystem includes basic inorganic elements and compounds, such as soil, water, oxygen, calcium carbonates, phosphates and a variety of organic compounds by-products of organic activities or death.
It also includes such physical factors and ingredients as moisture, wind currents and solar radiation. Radiant energy of sun is the only significant energy source for any ecosystem. The amount of non-living components, such as carbon, phosphorus, nitrogen, etc. From nutrition point of view, the biotic components can be grouped into two basic components:.
The autotrophic components include all green plants which fix the radiant energy of sun and manufacture food from inorganic substances. The heterotrophic components include non-green plants and all animals which take food from autotrophs. The producers are the autotrophic elements—chiefly green plants. They use radiant energy of sun in photosynthetic process whereby carbon dioxide is assimilated and the light energy is converted into chemical energy.
The chemical energy is actually locked up in the energy rich carbon compounds. Oxygen is evolved as by-product in the photosynthesis. This is used in respiration by all living things.
Algae and other hydrophytes of a pond, grasses of the field, trees of the forests are examples of producers. Chemosynthetic bacteria and carotenoid bearing purple bacteria that also assimilate CO 2 with the energy of sunlight but only in the presence of organic compounds also belong to this category.
The term producer is misleading one because in an energy context, producers produce carbohydrate and not energy. Since they convert or transduce the radiant energy into chemical form, E. Because of wide use the term producer is still retained. Those living members of ecosystem which consume the food synthesized by producers are called consumers. Under this category are included all kinds of animals that are found in an ecosystem. These are purely herbivorous animals that are dependent for their food on producers or green plants.
Insects, rodents, rabbit, deer, cow, buffalo, goat are some of the common herbivores in the terrestrial ecosystem, and small crustaceans, molluscs, etc. The herbivores serve as the chief food source for carnivores. These are carnivores and omnivores. Carnivores are flesh eating animals and the omnivores are the animals that are adapted to consume herbivores as well as plants as their food.
Examples of secondary consumers are sparrow, crow, fox, wolves, dogs, cats, snakes, etc. These are the top carnivores which prey upon other carnivores, omnivores and herbivores.
Lions, tigers, hawk, vulture, etc. The parasitic plants and animals utilize the living tissues of different plants and animals. The scavengers and saprobes utilize dead remains of animals and plants as their food.
Decomposers and transformers are the living components of the ecosystem and they are fungi and bacteria. Decomposers attack the dead remains of producers and consumers and degrade the complex organic substances into simpler compounds.
The simple organic matters are then attacked by another kind of bacteria, the transformers which change these organic compounds into the inorganic forms that are suitable for reuse by producers or green plants.
The decomposers and transformers play very important role in maintaining the dynamic nature of ecosystems.
An ecosystem is a discrete structural, functional and life sustaining environmental system. The environmental system consists of biotic and abiotic components in a habitat. Biotic component of the ecosystem includes the living organisms; plants, animals and microbes whereas the abiotic component includes inorganic matter and energy.
Abiotic components provide the matrix for the synthesis and perpetuation of organic components protoplasm. The synthesis and perpetuation processes involve energy exchange and this energy comes from the sun in the form of light or solar energy. These three interact and form an environmental system. Inorganic constituents are synthesized into organic structures by the green plants primary producers through photosynthesis and the solar energy is utilized in the process.
Green plants become the source of energy for renewals herbivores which, in turn become source of energy for the flesh eating animals carnivores.
Animals of all types grow and add organic matter to their body weight and their source of energy is complex organic compound taken as food. They are known as secondary producers. All the living organisms whether plants or animals in an ecosystem have a definite life span after which they die.
The dead organic remains of plants and animals provide food for saprophytic microbes, such as bacteria, fungi and many other animals. The saprobes ultimately decompose the organic structure and break the complex molecules and liberate the inorganic components into their environment. These organisms are known as decomposers. During the process of decomposition of organic molecules, the energy which kept the inorganic components bound together in the form of organic molecules gets liberated and dissipated into the environment as heat energy.
Thus in an ecosystem energy from the sun, the input is fixed by plants and transferred to animal components. Nutrients are withdrawn from the substrate, deposited in the tissues of the plants and animals, cycled from one feeding group to another, released by decomposition to the soil, water and air and then recycled.
The ecosystems operating in different habitats, such as deserts, forests, grasslands and seas are interdependent on one another. The energy and nutrients of one ecosystem may find their way into another so that ultimately all parts of the earth are interrelated, each comprising a part of the total system that keeps the biosphere functioning. The principal steps in the operation of ecosystem not only involve the production, growth and death of living components but also influence the abiotic aspects of habitat.
It is now clear that there is transfer of both energy and nutrients from producers to consumers and finally to decomposers and transformers levels. In this transfer there is a progressive decrease of energy but nutrient component is not diminished and it shows cycling from abiotic to biotic and vice versa. The flow of energy is unidirectional. The two ecological processes—energy flow and mineral cycling which involve interaction between biotic and abiotic components lie at the heart of ecosystem dynamics.
The principal steps and components of ecosystem are illustrated in Fig. Top Menu BiologyDiscussion. Ocean and Forest as an Ecosystem.
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The determinants of diversity are a central issue in ecology, particularly in Andean forests that are known to be a major diversity hotspot for several taxa. We examined the effect of abiotic elevation and precipitation and biotic flowering plant diversity factors considered to be decisive causal factors of diversity patterns on anthophyllous insect communities on mountain forest. All flowering plants in the understory and their flowering visitors were recorded. Species richness and diversity were estimated for each elevation and month. Diversity of flowering plants, elevation, and precipitation were used as independent variables in multiple regressions against insect diversity.
Ecosystem represents a relationship between organisms and their environments in a particular area at a certain time. It consists of all living organisms biotic factors and non-living, chemical and physical components abiotic factors of the environment with which the organisms interact such as air, soil, water and sunlight. The entire array of organisms inhabiting a particular ecosystem is called a community. Ecosystem is a functional unit of biotic and abiotic factors of the environment that links together through nutrient cycle and energy flow. Typically, in an ecosystem plants and other photosynthetic organisms are the producers that provide the food.
An organism is always in the state of perfect balance with the environment. The environment literally means the surroundings. The environment refers to the things and conditions around the organisms which directly or indirectly influence the life and development of the organisms and their populations. Organisms and environment are two non-separable factors. Organisms interact with each other and also with the physical conditions that are present in their habitats. The concept of ecosystem was first put forth by A.
An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system. By feeding on plants and on one another, animals play an important role in the movement of matter and energy through the system. They also influence the quantity of plant and microbial biomass present. By breaking down dead organic matter , decomposers release carbon back to the atmosphere and facilitate nutrient cycling by converting nutrients stored in dead biomass back to a form that can be readily used by plants and other microbes.
There are quite a few forest ecosystem pdfs , available for those inclined to research into this further. Real assets versus financial assets 1. The tank water first flows into a narrow chamber full of bioballs. Urban Land Institute. There are two main components of an ecosystem which are in constant communication with each other.
For this purpose, the shares of indicators as a percentage of their total number in the dynamics of negative changes in aquatic ecosystems were compared on the basis of long-term monitoring information of Roshydromet and data of own expeditionary investigation in reservoirs on hydrobiological, toxicological and physico-chemical indicators. The role of the biotic component increases as the state of the aquatic ecosystem deteriorates of the Tsimlyansky reservoir, on the contrary, decreases in the Manychsky it is established. The role of the abiotic component is great and similar in all reservoirs; it increases already in a state extraordinary ecological situation but in ecological disaster is somewhat reduced.
The term ecosystem was coined by A. Though the organisms may claim out primary interest, when we are trying to think fundamentally we cannot separate them from their special environment which they form one physical system. It is the systems so formed which………………….. Thus, the ecosystem can be of any size. It has been observed that the green plants and some autotrophic bacteria are able to prepare their own food by utilizing solar radiant energy light.
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