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Yellagonga Wetland Ecology Education resource
Yellagonga Wetland Ecology Education resource

... photosynthesis. Animals can get this energy by eating plants or animals that eat plants. Animals release the energy from food by respiration to the system by decomposers. Autotrophs/Producers – living thing that make their own food. Heterotrophs/Consumer – living things do not make their own food. D ...
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... compounds…..Theses are called ____________________,which use the energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules….finally forming tissue – Because they can make their own food,autotrophs are called __________________. – Both types of prod ...
ch3biosphere2004
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... compounds…..These are called ____________________,which use the energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules….finally forming tissue – Because they can make their own food,autotrophs are called __________________. – Both types of produ ...
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... 5th Grade Science - Ecosystems Common Assessment 1. Plants, algae, and other producers use the sun’s energy, water, and carbon dioxide to make their own food. What is this process called? A. B. C. D. ...
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... This candidate has included a lot of information here. A good deal of it is correct but some points are imprecise. For example, autotrophs include green plants but other organisms such as some bacteria are also able to photosynthesize. It is important to take care to refer to ‘organisms’ rather than ...
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Ecology Review 1. Draw a diagram of a marine food chain and label
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... Ecosystem - The interaction between organisms and their environment. Wetland - a lowland area, such as a marsh or swamp that is saturated with moisture, Aquifer - any geologic formation of sand, soil and gravel where groundwater is stored. Macroinverebrate Biodiversity - A term that describes the nu ...
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... is the same shape as the energy and biomass pyramids – meaning that there are usually more organisms at the lower levels; however, that is not always the case. Ex. In a forest – there are fewer producers than consumers…. A single tree has a large amount of energy & biomass, but it is only 1 organism ...
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... In which of the following habitats would you expect to find the largest number of Kselected individuals? an abandoned field in Ohio b. the sand dunes south of Lake Michigan c. the rain forests of Brazil ...
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Food web



A food web (or food cycle) is the natural interconnection of food chains and generally a graphical representation (usually an image) of what-eats-what in an ecological community. Another name for food web is a consumer-resource system. Ecologists can broadly lump all life forms into one of two categories called trophic levels: 1) the autotrophs, and 2) the heterotrophs. To maintain their bodies, grow, develop, and to reproduce, autotrophs produce organic matter from inorganic substances, including both minerals and gases such as carbon dioxide. These chemical reactions require energy, which mainly comes from the sun and largely by photosynthesis, although a very small amount comes from hydrothermal vents and hot springs. A gradient exists between trophic levels running from complete autotrophs that obtain their sole source of carbon from the atmosphere, to mixotrophs (such as carnivorous plants) that are autotrophic organisms that partially obtain organic matter from sources other than the atmosphere, and complete heterotrophs that must feed to obtain organic matter. The linkages in a food web illustrate the feeding pathways, such as where heterotrophs obtain organic matter by feeding on autotrophs and other heterotrophs. The food web is a simplified illustration of the various methods of feeding that links an ecosystem into a unified system of exchange. There are different kinds of feeding relations that can be roughly divided into herbivory, carnivory, scavenging and parasitism. Some of the organic matter eaten by heterotrophs, such as sugars, provides energy. Autotrophs and heterotrophs come in all sizes, from microscopic to many tonnes - from cyanobacteria to giant redwoods, and from viruses and bdellovibrio to blue whales.Charles Elton pioneered the concept of food cycles, food chains, and food size in his classical 1927 book ""Animal Ecology""; Elton's 'food cycle' was replaced by 'food web' in a subsequent ecological text. Elton organized species into functional groups, which was the basis for Raymond Lindeman's classic and landmark paper in 1942 on trophic dynamics. Lindeman emphasized the important role of decomposer organisms in a trophic system of classification. The notion of a food web has a historical foothold in the writings of Charles Darwin and his terminology, including an ""entangled bank"", ""web of life"", ""web of complex relations"", and in reference to the decomposition actions of earthworms he talked about ""the continued movement of the particles of earth"". Even earlier, in 1768 John Bruckner described nature as ""one continued web of life"".Food webs are limited representations of real ecosystems as they necessarily aggregate many species into trophic species, which are functional groups of species that have the same predators and prey in a food web. Ecologists use these simplifications in quantitative (or mathematical) models of trophic or consumer-resource systems dynamics. Using these models they can measure and test for generalized patterns in the structure of real food web networks. Ecologists have identified non-random properties in the topographic structure of food webs. Published examples that are used in meta analysis are of variable quality with omissions. However, the number of empirical studies on community webs is on the rise and the mathematical treatment of food webs using network theory had identified patterns that are common to all. Scaling laws, for example, predict a relationship between the topology of food web predator-prey linkages and levels of species richness.
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