the number of species living within an ecosystem is a measure of its?
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It is a simplistic measure of its biodiversity.  Much more sophisticated measures exist, however.
190232
is it........\n\n             KINGDOM\n             PHYLUM\n             CLASS\n             ORDER\n             FAMILY\n             GENUS\n             SPECIES\nis that what you are looking for.........
83865
an ecosystem is a place with food water shelter air and space.They are habitats for animals.
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to balance the ecosystem
200699
Species matters more than age.
1022637
I would do something like this:\n\n* Similarities and differences among living organisms\n(For example, the characteristics of life, cells, comparing single and multicellular organisms)\n*Homeostasis in living things\n(Basic biochemical processes, Feedback systems, Disease)\n*Genetics\n(Heredity, Genes)\n*Reproduction and development\n(Cell division, reproduction among organisms)\n*Evolution\n(Theories)\n*Ecology\n(Interaction between organisms and their environments, energy flow)\n\nThese are just a few ideas.
115038
an ecosystem and biome are different in that a biome is the combination of different ecosystem's that will work together...\n\nLook at it this way, an ecosystem is more like a food chain, where as a biome is more like a food web...\n\nan ecosystem maybe be a river, but a biome will be the whole forest with a few rivers, maybe a swamp area, and other things...   \n\n:)
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The usual example is that of a pond; a self-contained ecosystem.\nNow you need to do your learning and consider how the organisms depend upon one another.
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I took this from wikipedia. It's for reference!!\n\nAn ecosystem, a contraction of "ecological" and "system", refers to the collection of components and processes that comprise, and govern the behavior of, some defined subset of the biosphere. The term is generally understood to refer to all biotic and abiotic components, and their interactions with each other, in some defined area, with no conceptual restrictions on how large or small that area can be. \nIn biology, Abiotic components are nonliving chemical and physical factors in the environment. Often, these are described as light, temperature, water, atmospheric gases, wind as well as soil (edaphic) and physiographic (nature of land surface) factors.\nThese factors could be said to be the definitions for the exact environmental conditions in which plants need to grow.\nOxygen, carbon dioxide, and nitrogen are the most commonly described gasses; and the wind, soil, and physiographic conditions can also combine in multiple ways to affect organisms.\nIn general terms an ecological system can be thought of as an assemblage of organisms (plant, animal and other living organisms—also referred to as a biotic community or biocoenosis) living together with their environment (or biotope), functioning as a loose unit. That is, a dynamic and complex whole, interacting as an "ecological unit."\n\n\nOther population ecologists, stochastists, (den Boer & Reddingius, 1996), view an ecosystem as an expression of stochastic events, and corresponding responses from organisms. 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.\n\nCheck the link for more info you need. I'm not familiar with this, besides basic info but hopefully this helps.
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Diversity is a term that refers both to the different classes of items in a given system, and also to the distribution of those items in those classes.\nBiological diversity or biodiversity is related to the concept of biocomplexity, that is, the web of interelationships and fluxes circulating in the ecosystem. It is usually measured at three levels: ecological biodiversity, species biodiversity and genetic biodiversity.\n\nSpecies biodiversity is not only the number of species in a given ecosystem, but also the proportion of individuals that belong to each species. \nExample: \nIf you have 10 species, but out of a 100-individuals sample, 91 belong to a single species, then the biodiversity is not that high. In probabilistic terms, you  could say that the chances of finding 9 of the 10 species in any sample is low. \n\nThe rainforests of the world are classical examples of high diversity ecosystems. In contrast, most ecosystems that are under continuous stress are less biodiverse, for example deserts, or grasslands. However, low biodiversity does not necessarily mean "less healthy" ecosystems. Although a grassland is less biodiverse than a rainforest, it's a stable biome all the same.\nA related concept, ecological biodiversity, refers to the variety of ecosystems in a given area, and the pattern of distribution of communities in a given landscape. No ecosystem is completely isolated from others and the health of each one depends partly on the interrelationships with other areas, therefore, the loss of ecological biodiversity due to the disappearance of certain environments can lead to greater unbalances.\nGenetic biodiversity refers to variety at genetic level. In a population, it refers to the different alleles (variations of a single gene) that are present. We know that evolutionarily speaking, polymorphisms (presence of different alleles) are a sign of a healthy population, because a greater source of variation is a better resource to respond to environmental changes. Populations that lose their genetic biodiversity (for example, because the number of individuals is severely reduced) may be more exposed to extinction. \nBiodiversity can be measured at all the organization levels studied by Ecology, but is especially focused in communities and ecosystems.
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Chose the ecosystem first, there are virtually an infinite number based on how you define one.  The biological components are the living things in a specific ecosystem.  \n\n"the physical and biological components of an environment\n\n"The size and scale of an ecosystem can vary widely. It may be a whole forest, as well as a small pond, or even the geobiosphere itself. Different ecosystems are often separated by geographical barriers, like deserts, mountains or oceans, or are isolated otherwise, like lakes or rivers. As these borders are never rigid, ecosystems tend to blend into each other. As a result, the whole earth can be seen as a single ecosystem, or a lake can be divided into several ecosystems, depending on the scale used."
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In ecology, an ecosystem is a combination of all the living and non-living elements of an area. Ecosystems are the smallest level of organisation in nature that incorporates both living and nonliving factors. They can range in size from as big as the Sahara Desert to as small as a pond. The term microecosystem may be used to describe a very small (often closed) ecosystem.\n\nIn general terms an ecological system can be thought of as an assemblage of organisms (plant, animal and other living organisms—also referred to as a biotic community or biocoenosis) living together with their environment (or biotope), functioning as a loose unit. That is, a dynamic and complex whole, interacting as an "ecological unit."\n\nEarly conceptions of this unit showed a structured functional unit in equilibrium of energy and matter flows between its constituent elements. Others considered this vision limited, and preferred to understand an ecosystem in terms of cybernetics. From this view an ecological system is a functional dynamic onganization, or what was also called steady state. 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 achieved 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 and the death of many native species. The branch of ecology that gave rise to this view has become known as Systems Ecology. 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 steady state.\n\nThe size and scale of an ecosystem can vary widely. It may be a whole forest, a community of bacteria and algae in a drop of water, or even the geobiosphere itself. Different ecosystems are often separated by geographical barriers, like deserts, mountains or oceans, or are isolated otherwise, like lakes or rivers. As these borders are almost never rigid, ecosystems tend to blend into each other. As a result, the whole earth can be seen as a single ecosystem, or a lake can be divided into several ecosystems, depending on the scale used.
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We have catalogued an estimated less than half the species out there- And once catalogued, we don't have an active system to determine populations of most species.  Thus, we are in the dark about what species are there, how many there are in the population, etc.  GIven that, we have only vague guesses about the number of species lost.  In a similar vein, we assume new species are being born each year, or at least each decade, but since we don't know what species were there before, we certainly can't tell if a species is newly evolved, or is just one we have never seen before.
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There are hundreds if not thousands of insects per each human so if you count them, fish, etc.  You have thousands to one.  If you want to count bacteria as animals then it is billions to one.
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Yes the government knows. The counting of people is called a census. Im not sure how many but the last time I checked there was like 8 billion people on earth.
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well, the diversity of environment, is the fact that there is more than one type of ecosystem on earth, we are not just a desert, or just a rainforest, or plains, or mountains, we have everything.\n\nwithout the diverse nature of our landscape, life would not be possible on the scale that it is.   we would not have the weather systems that heal and renew the scars left by catostrophic weather, and the systems that keep large, dangerous systems in check.\n\ntry the natural georaphic website.
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Nobody is sure, though lots of scientists are involved in trying to count them.  Best estimates for this planet currently put the number somewhere between 2 million and 20 million!  Most of these are insects, and a huge percentage of the insect species are beetles.  \n\nCarl Linnaeus, who gave us our system of classifying species (or taxonomy), is supposed to have said "God must be inordinately fond of beetles", though he probably said it in Swedish!