what are all of the populations of different species that live and interact in an area?
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Community and/or Ecosystem
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Estimates of the present global macroscopic species diversity vary from 2 million to 100 million species, with a best estimate of somewhere near 10 million. Note the word macroscopic, this excludes microscopic oragnisms.\n\nThe U.S. has over 17,000 identified native plant and tree species, including 5,000 just in California. With habitats ranging from tropical to arctic, the flora of the U.S. is the most diverse of any country; yet, thousands of non-native exotic species sometimes adversely affect indigenous plant and animal communities. Over 400 species of mammal, 700 species of bird, 500 species of reptile and amphibian, and 90,000 species of insect have been documented.\n\n Insects are the most diverse group of animals on the earth, with around 925,000 species described—more than all other animal groups combined. There's over a million arthropods, a group which includes insects.\n\nAbout 350,000 species of plants have been estimated to exist. As of 2004, some 287,655 species had been identified, of which 258,650 are flowering.\n\nI'm just adding them up.
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spiders of all kinds and sizes
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These might help-\nhttp://www.itools.com/research/\nhttp://www.mun.ca/biology/scarr/2900_Species.htm\nhttp://www.biocourse.com/mhhe/bcc/domains/olc_toc.xsp
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Complex: many species interacting.\nSimple: few species interacting.
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That is a great question! I hope this helps you:\n\nhttp://www.aresearchguide.com/biomes.html
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Community or ecosystem.
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geographical (spatial) isolation, \nisolation of the biotope, i.e. the organisms live in the same area, but have different needs regarding the biotop, \nisolation by season or daytime, i.e. the opening of flowers is staggered depending on season or daytime, \nethological isolation, i.e. the species to be pollinated are visited by different pollinators, \nmechanical isolation, i.e. a genetically reproductive isolation within a species is diminished or prevented by differences in the flowers’ shape, \nisolation by sterility..
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Yes, the ambience is quite congenial for animal living. The rare species among them are being propagated within the ecological limitations.
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Squirrels.  Chipmunks.  People.  Orangutans.  Stuff like that.
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From a website:\nIn biology, the range of a species is the geographical area within which that species can be found.\n\nThe term is often qualified:\n\nsometimes a distinction is made between a species' native range and the places to which it has been introduced by human agency (deliberately or accidentally). \nfor species which are found in different regions at different times of year, terms such as summer range and winter range are often employed. \nfor species where only part of their range is used for breeding activity, the terms breeding range and non-breeding range are used. \nwhen discussing mobile animals, the species' natural range is often discussed, as opposed to areas where it occurs as a vagrant. \ngeographic or temporal qualifiers are often added e.g. British range or pre-1950 range
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phytoplankton\nzoo plankton\nfilter feeders (clams, corals etc) and small fish\nlarger predatory fish and coral grazers\neven larger predatory fish
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THE NICHE CONCEPT & ETHNIC DIVERSITY\n\n\nIntro\n\nOne of the striking facts about contemporary society, and indeed of much of recorded history, is the division of the human species into distinct ethnic groups, whose interrelations are sometimes antagonistic and sometimes mutualistic\n\nWhile there are many interesting ways social scientists analyze this phenomenon, ecological theory may provide some additional insights\n\nThis lecture approaches this topic as follows:\n\n1. What is ecological niche theory? (brief summary)\n2. How can we apply this theory to human ethnic diversity?\n3. Discussion of Swat case (Barth reading)\n\nCharacter displacement refers to the phenomenon where differences among similar species whose distributions overlap geographically are accentuated in regions where the species co-occur but are minimized or lost where the species’ distributions do not overlap. This pattern results from evolutionary change driven by competition among species for a limited resource (e.g. food). The rationale for character displacement stems from the competitive exclusion principle, also called Gause's Law, which contends that to coexist in a stable environment two competing species must differ in their respective ecological niche; without differentiation, one species will eliminate or exclude the other through competition.
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fish\nreptiles\namphibians\nbirds\nmammals\nmarsupials
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Greetings,\n\nCheck out this link: http://www.allturtles.com/turtle_species/slider.php\n\nBasically these turtles live all over the world in fresh water ecosytems.  They are listed as one of the top invader species.  Pick a fresh water ecosystem and go from there.\n\nFish, crayfish, birds, etc.\n\n-matt
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community- its the assemblage of similar species in an area\npopulation- it is an assemblage of several communities in an area
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Try this:\n\nhttp://en.wikipedia.org/wiki/List_of_biologists