what is an ecosystem???????

Answer 1

An ecosystem, a contraction of "ecological" and "system", refers to the collection of biotic and abiotic components and processes that comprise, and govern the behaviour of some defined subset of the biosphere.

The term ecosystem is generally understood as to the entire assemblage of organisms (plant, animal and other living beings—also referred to as a biotic community or biocoenosis) living together in a certain space with their environment (or biotope), functioning as a loose unit. Together, these components and their interactions with and relationships to each other form a dynamic and complex new whole, functioning as an "ecological unit", with additional characteristics that can't be found in the individual components. There are no conceptual restrictions on how large or small a space or an area must be, nor on the minimum numbers species or individual organisms to be present.

Early conceptions of an ecosystem were as a structured functional unit in equilibrium of energy and matter flows among constituent elements. Some considered this vision limited,and preferred to view an ecosystem in terms of cybernetics, which, like any other type of system, is governed by the rules of systems science and cybernetics, as applied specifically to collections of organisms and relevant abiotic components. The branch of ecology that gave rise to this view has become known as systems ecology.

To many ecologists, "regulationists", ecosystems are somehow regulated by some kind of control mechanism intrinsic to the system, that strives to achieve a certain "Steady state" in which all components are at some degree of equilibrium with each other, often referred to as the "balance of nature". Some scholars go as far as to consider the biosphere as a single new self-regulating organism: the "Gaia theory". The steady state is understood as the phase of an ecological system's evolution when the organisms are "balanced" with each other and their environment. This balance is regulated through various types of interactions, such as predation, parasitism, mutualism, commensalism, competition, and amensalism. Introduction of new elements, whether abiotic or biotic, into an ecosystem tend to have a disruptive effect. In some cases, this can lead to ecological collapse or "trophic cascading" and the death of many species belonging to the ecosystem in question. Under this deterministic vision, the abstract notion of ecological health attempts to measure the robustness and recovery capacity for an ecosystem; that is, how far the ecosystem is away from its steady state.

Answer 2

An ecosystem, a contraction of "ecological" and "system", refers to the collection of biotic and abiotic components and processes that comprise, and govern the behaviour of some defined subset of the biosphere.

The term ecosystem is generally understood as to the entire assemblage of organisms (plant, animal and other living beings—also referred to as a biotic community or biocoenosis) living together in a certain space with their environment (or biotope), functioning as a loose unit. Together, these components and their interactions with and relationships to each other form a dynamic and complex new whole, functioning as an "ecological unit", with additional characteristics that can't be found in the individual components. There are no conceptual restrictions on how large or small a space or an area must be, nor on the minimum numbers species or individual organisms to be present.

Early conceptions of an ecosystem were as a structured functional unit in equilibrium of energy and matter flows among constituent elements. Some considered this vision limited,and preferred to view an ecosystem in terms of cybernetics, which, like any other type of system, is governed by the rules of systems science and cybernetics, as applied specifically to collections of organisms and relevant abiotic components. The branch of ecology that gave rise to this view has become known as systems ecology.

To many ecologists, "regulationists", ecosystems are somehow regulated by some kind of control mechanism intrinsic to the system, that strives to achieve a certain "Steady state" in which all components are at some degree of equilibrium with each other, often referred to as the "balance of nature". Some scholars go as far as to consider the biosphere as a single new self-regulating organism: the "Gaia theory". The steady state is understood as the phase of an ecological system's evolution when the organisms are "balanced" with each other and their environment. This balance is regulated through various types of interactions, such as predation, parasitism, mutualism, commensalism, competition, and amensalism. Introduction of new elements, whether abiotic or biotic, into an ecosystem tend to have a disruptive effect. In some cases, this can lead to ecological collapse or "trophic cascading" and the death of many species belonging to the ecosystem in question. Under this deterministic vision, the abstract notion of ecological health attempts to measure the robustness and recovery capacity for an ecosystem; that is, how far the ecosystem is away from its steady state.

Answer 3

An ecosystem, a contraction of "ecological" and "system", refers to the collection of biotic and abiotic components and processes that comprise, and govern the behaviour of some defined subset of the biosphere.

The term ecosystem is generally understood as to the entire assemblage of organisms (plant, animal and other living beings—also referred to as a biotic community or biocoenosis) living together in a certain space with their environment (or biotope), functioning as a loose unit. Together, these components and their interactions with and relationships to each other form a dynamic and complex new whole, functioning as an "ecological unit", with additional characteristics that can't be found in the individual components. There are no conceptual restrictions on how large or small a space or an area must be, nor on the minimum numbers species or individual organisms to be present.

Answer 4

refers to the collection of biotic and abiotic components and processes that comprise, and govern the behaviour of some defined subset of the biosphere.

The term ecosystem is generally understood as to the entire assemblage of organisms (plant, animal and other living beings—also referred to as a biotic community or biocoenosis) living together in a certain space with their environment (or biotope), functioning as a loose unit.

Answer 5

According to Encarta Encyclopedia, an ecosystem is: "a localized group of interdependent organisms together with the environment that they inhabit and depend on"

Answer 6

an ecosystem is a region of different living beings. like earth, you have animals and humans living in the same place at the same time.

Answer 7

www.google.com
ur dictionary
Go consult these 2.

Answer 8

An ecosystem, a contraction of "ecological" and "system", refers to the collection of biotic and abiotic components and processes that comprise, and govern the behaviour of some defined subset of the biosphere.

The term ecosystem is generally understood as to the entire assemblage of organisms (plant, animal and other living beings—also referred to as a biotic community or biocoenosis) living together in a certain space with their environment (or biotope), functioning as a loose unit. Together, these components and their interactions with and relationships to each other form a dynamic and complex new whole, functioning as an "ecological unit", with additional characteristics that can't be found in the individual components. There are no conceptual restrictions on how large or small a space or an area must be, nor on the minimum numbers species or individual organisms to be present.

Early conceptions of an ecosystem were as a structured functional unit in equilibrium of energy and matter flows among constituent elements. Some considered this vision limited,and preferred to view an ecosystem in terms of cybernetics, which, like any other type of system, is governed by the rules of systems science and cybernetics, as applied specifically to collections of organisms and relevant abiotic components. The branch of ecology that gave rise to this view has become known as systems ecology.

To many ecologists, "regulationists", ecosystems are somehow regulated by some kind of control mechanism intrinsic to the system, that strives to achieve a certain "Steady state" in which all components are at some degree of equilibrium with each other, often referred to as the "balance of nature". Some scholars go as far as to consider the biosphere as a single new self-regulating organism: the "Gaia theory". The steady state is understood as the phase of an ecological system's evolution when the organisms are "balanced" with each other and their environment. This balance is regulated through various types of interactions, such as predation, parasitism, mutualism, commensalism, competition, and amensalism. Introduction of new elements, whether abiotic or biotic, into an ecosystem tend to have a disruptive effect. In some cases, this can lead to ecological collapse or "trophic cascading" and the death of many species belonging to the ecosystem in question. Under this deterministic vision, the abstract notion of ecological health attempts to measure the robustness and recovery capacity for an ecosystem; that is, how far the ecosystem is away from its steady state.

To others, (den Boer & Reddingius, 1996), ecosystems are primarily governed by stochastic events, the reactions they provoke on non-living materials and the responses by organisms to the conditions surrounding them. Thus, ecosystems result from the sums of infinite individual responses of organisms to stimuli from non-living and living elements in the environment. The presence or absence of populations merely depends on reproductive and dispersal success and population levels fluctuate in response to stochastic (chance) events. As the number of species in an ecosystem is higher, the number of stimuli is also higher.

In their vision, since the beginning of life, organisms have survived continuous change through natural selection of successful feeding, reproductive and dispersal behaviour by means of which the planet's species have continuously adapted to change through variation in their biological composition and distribution. Mathematically it can be demonstrated that greater numbers of different interacting factors, tend to dampen fluctuations in each of the individual factors. Given the great diversity among organisms on earth, most of the time, ecosystems only changed very gradually, as some species would disappear while others would move in or evolve. Locally, sub-populations continuously go extinct, to be replaced later through dispersal of other sub-populations. Stochastists do recognise that certain intrinsic regulating mechanisms occur in nature. Feedback and response mechanisms at the species level regulate population levels, most notably through territorial behaviour. Andrewatha and Birch (1954), suggest that territorial behaviour tends to keep populations at levels where food supply is not a limiting factor. Hence, stochastists see territorial behaviour as a regulatory mechanism at the species level but not at the ecosystem level. Thus, in their vision, ecosystems are not regulated by feedback and response mechanisms from the (eco)system itself and there is no such thing as a balance of nature and.

If ecosystems would primarily be governed by stochastic processes, they may be somewhat more resilient to sudden change, as each species would respond individually. In the absence of a balance of nature, the species composition of ecosystems would undergo shifts that would depend on the nature of the change, but entire ecological collapse would probably be less frequently occurring events.

Ecosystems have become particularly important politically, since the Convention on Biological Diversity (CBD) - ratified by more than 175 countries - defines "the protection of ecosystems, natural habitats and the maintenance of viable populations of species in natural surroundings" as one of the binding commitments of the ratifying countries. This has created the political necessity to spatially identify ecosystems and somehow distinguish among them. The CBD defines an "ecosystem" as a "dynamic complex of plant, animal and micro-organism communities and their non-living environment interacting as a functional unit".

With the need of protecting ecosystems, the political need arose to describe and identify them within a reasonable time and cost-effectively. Vreugdenhil et al. argued that this could most effectively be achieved using a physiognomic-ecological classification systems, as they are easily recognizable in the field as well as on satellite images. They argued that the structure and seasonality of the vegetation, complemented with ecological data, such as elevation, humidity, drainage, salinity of water, characteristics of water bodies, each are determining modifiers that separate partially distinct sets of species. This is true not only for plant species, but also for species of animals, fungi and bacteria. The degree of ecosystem distinction is subject to the physiognomic modifiers that can be identified on an image and/or in the field. Where necessary, specific fauna elements can be added, such as periodic concentrations of animals and the distribution of coral reefs. Several physiognomic-ecological are available: the UNESCO system: Physiognomic-Ecological Classification of Plant Formations of the Earth, Mueller Dombois and Ellenberg, 1974, and its derivatives, develloped by the United States Vegetation Committee USVCS and the FAO develloped Land Cover Classification System, LCCS. Several systems aquatic systems are available and an effort is being made by the USGS and IABIN to design a complete ecosystem classification system that covers both terrestrial and aquatic ecosystems.

Answer 9

Please do an Internet search.