What forms the base of the ecological food chain? explain?
453156
Producers. Organisms, such as plants, that produce their own food are called autotrophs. The autotrophs, as mentioned before, convert inorganic compounds into organic compounds. They are called producers because all of the species of the ecosystem depend oConsumers. All the organisms that can not make their own food (and need producers) are called heterotrophs. In an ecosystem heterotrophs are called consumers because they depend on others. They obtain food by eating other organisms. There are different levels of consumers. Those that feed directly from producers, i.e. organisms that eat plant or plant products are called primary consumers. In the figure above the grasshopper is a primary consumern them                                                                          Organisms that feed on primary consumers are called secondary consumers. Those who feed on secondary consumers are tertiary consumers. In the figure above the snake acts as a secondary consumer and the hawk as a tertiary consumer. Some organisms, like the squirrel are at different levels. When the squirrel eats acorns or fruits (which are plant product), it is a primary consumer; however, when it eats insects or nestling birds, is it is a tertiary consumer.\nConsumers are also classified depending on what they eat\nHerbivores are those that eat only plants or plant products. Example are grasshoppers, mice, rabbits, deer, beavers, moose, cows, sheep, goats and groundhogs.\nCarnivores, on the other hand, are those that eat only other animals. Examples of carnivores are foxes, frogs, snakes, hawks, and spiders.\nOmnivores are the last type and eat both plants (acting a primary consumers) and meat (acting as secondary or tertiary consumers). Examples of omnivores are:\nBears --They eat insects, fish, moose, elk, deer, sheep as well as honey, grass, and sedges. Turtles -- They eat snails, crayfish, crickets, earthworms, but also lettuce, small plants, and algae. Monkeys -- They eat frogs and lizards as well as fruits, flowers, and leaves. Squirrels -- They eat insects, moths, bird eggs and nestling birds and also seeds, fruits, acorns, and nuts
337410
None of these answers are correct for all food chains.  "D" would seem to be the best answer, but it is not always true.  It always depends on the ecosystem.  In most cases, producers will outnumber the consumers.  But not always.  For example, in a forest ecosystem a single large producer (oak tree or whatever) may support thousands of caterpillar and hundreds of  consumers like spiders and birds. If you have to pick one, pick D. Just know that it is not always true.
300413
Prey feeds the predator.\nPredator keeps #s of prey down so as to remain within their food supply limits.\nThe more food, the more prey, the more predators.\nThe more predators, the less prey.\n\nThe system stays in balance.
819105
I found it on the web site. Scroll to the bottom of the page.\n\nhttp://scitec.uwichill.edu.bb/bcs/courses/Ecology/BL21C/ECOL2453_sc/Seasonal_communities.html
69372
Primary? Think? no , actually I think it is Secondary. Primary are the plants themselves which actually consume only from the invironment around them such as CO2, water and solar energy. I think that's right. Can't think of where the second word goes, though. Sorry!?
900998
A food web or food chain is just a representation of what would eat what.  To make one simple list animals making a connections from the prey to the consumer.
83086
Well, I can tell you that a non-biological cake is not much edible.\nOther than that, is it possible that you're referring to the "metaphor" (kind of) that depicts Biology as a cake in which the layers are the basic divisions (disciplines like genetics, ecology, morphology, etc.) and the slices are the taxonomical divisions (i.e. all the taxa to which the disciplines can be applied).\nSee the link for an illustration of the concept.
690764
food chain and bird food
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ecosystem? biosphere? biological community?
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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.
97371
Have enough picture/word cards of animals/plants in a food chain for each student to have one.  You need a big ball of yarn or string.  Put the students in a circle.  The lowest person on the food chain starts.  They hold the string and throw the ball to the next highest person on the chain (preferably, they are not sitting in order).  That person holds on to the string and tosses the ball to the next person.  \n\nAt the end, you've formed a web of interconnected species.  To simulate environmental changes, have a few students drop their part of the web.  It will fall and dissinigrate showing how a healthy ecosystem is dependant on all of its occupants.\n\nHope that helps.
84613
The term you are looking for is "autotrophs."  The word means "self-feeders" and these types of organisms can synthesize their own energy-rich organic molecules.  They do not require any organic molecules from outside sources; only inorganic molecules.\nAutotrophs include plants and other photosynthetic organisms, and chemosynthetic bacteria (who form their food from chemicals).  \nAs a side note, heterotrophs are the organisms that cannot create their own food.\n\nHope this is helpful :-)
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An ecological niche is not a "place" or a "site" in space, although the 'niche metaphor' may lead us to think of it that way (because a 'niche' is a hollow where things fit).\nIn short, the ecological niche is every function and relationship that links a particular species to all its environment (which includes both other living beings and  abiotic, or non-living, factors). You cannot define an ecological niche without the species, or define the species without its niche, because the niche arises from the interaction between the individuals (their 'inside' processes) and their environment (the 'outside'). \nIn order to describe the niche, you need to enumerate all these relationships: where the species lives, at what times it is active, and how its activities change, what does it eat and what feeds upon it (trophic relationships), what other living beings interact with it (competition, parasitism, cooperation, symbiosis, etc), what are its tolerance ranges for environmental factors (temperature, humidity, precipitations, sunlight, etc)... everything that the species represents from an ecological viewpoint. \nThe ecological niche can be visualized on the basis of Hutchinson's idea of a multidimensional niche. \nPicture this: \nYou make a graph showing the temperature tolerance range for a given species, and it will look like this:\nhttp://www.bact.wisc.edu/Microtextbook/images/textbook/growth/temp_curve.gif\nThat's one ecological factor.\n\nNow we add a second factor, in this case, moisture:\nhttp://www.physicalgeography.net/fundamentals/images/niche.gif\nWe have a 2-dimensional graph.\n\nIf we consider a third ecological factor, we get a 3-D graph. \nWhen more ecological factors are included, the representation becomes an hypervolume and cannot be represented in a simple graph.\n\nNow, back to the spruce beetle. This species (Dendroctonus rufipennis) is responsible for extensive damage to Northern Hemisphere forests. I hope the above explanation has made it clear than a forest is not an ecological niche. The forest is a habitat, but the beetle lives in a subdivision of this habitat that constitutes its specific microhabitat. The niche includes this microhabitat, but also what the beetle eats, its predators, symbionts, parasites, its temperature tolerance ranges, the particular species of trees where it breeds and feeds, etc. You can find that information here:\nhttp://www.na.fs.fed.us/spfo/pubs/fidls/sprucebeetle/sprucebeetle.htm\nhttp://www.srd.gov.ab.ca/forests/health/i_sprucebeetle.html\n\nTake into account that this beetle, as most insects, has indirect development. That means that the requirements of the larva, pupa and adult will probably be different and each life stage will have its own niche.\n\nI hope this helps!
664986
We can think in general terms of a food chain consisting of three main groupings, or trophic levels: plants, herbivores, and carnivores. Plants are at the "bottom" of the food chain—they are able to make their own food by using the energy from the sun (they are autotrophic). Because they produce their own food, they are called Producers. All other living things that can't make their own food must consumer the producers, so they are called consumers (and are heterotrophic). Consumers are higher up the food chain (at a higher trophic level) and are either herbivores (they directly consume the producers) or carnivores (they eat other consumers). Macroinvertebrates are heterotrophic and may be both herbivores and carnivores. \n\nBecause benthic macroinvertebrates eat and are eaten, they are smack-dab in the middle of the food chain, a position that is critical in a healthy stream ecosystem. Herbivorous stream bugs consume plants and algae (these bugs are the scrapers and shredders). \n\nThe benthic macroinvertebrates that eat small fish, small amphibians, and other stream bugs are the carnivores. These predaceous macroinvertebrates are the predators\n\nTo confuse matters slightly, there is another group in addition to the herbivores and carnnivores. Detritivores are sort of a combination of herbivores and carnivores. Detritivores shred and eat leaves and other organic matter that contain nourishing fungi, algae, and bacteria. They absorb the nutrients as they break down the material into smaller sizes that other bugs utilize. Detritivores are the shredders and collectors. \n\nStream bugs may get eaten by other macroinvertebrates and fish that depend upon them for food. For example, both juvenile and adult salmon eat macroinvertebrates. And not only do other consumers need them for food, but when the bugs die, they decay and leave nutrients behind that flow back into the food chain. \n\nSo without the stream bugs, organic materials won't be processed, nutrients won't get recycled back into the system, and many consumers won't have any food—in short, the system degrades until it is unhealthy or dead, then most bugs couldn't live there even if they wanted to.
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remember food chain!!\n\nwhen one species ceases to live their food starts too overpopulate creating dangerous unbalance in chainfood.\nLike in australia, long time ago they released rabbits into the wild. They didn't have many predators to hunt rabbits down and keep them from overpopulating, thats why they had rabbit hunting seasons, they were overpopulated.\n\nplus, if one species increases in number that means more food is needed, that means the food source will get depleted faster and if that food source is shared with some other species they will cease to exist as well.\n\nVote best if it answers your question!
1095314
the phenomenon involved is Photosynthesis and Chemosynthesis.\nThe mode of nutrition involving  synthesis of organic substances mainly in the form of carbohydrates from inorganic substances  utilizing sunlight or any other source of light as energy source and CO2 as the carbon source and  H2O or H2S as teh Hydrogen and electron source is called the Photoautotrophic mode of nutrition.. examples  include all plants , algae, and cyanobacteria.\nChemoheterotrophs are those organisms that obtain energy from inorganic compounds but carbon is organic to form organic  substances like sulphur bacteria and hydrogen bacteria
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I'll give you the general idea, you figure out the specific sentences you want.\n\nIn general, symbiosis is where 2 organisms co-exist and help each other out.  For example we have bacteria in our digestive tract.  The bacteria helps us digest some foods and we in turn give the bacteria a home.  Good for the bacteria (they get to live), and good for us (we get some foods digested that our digestive tracts could not otherwise get digested).