• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Ecology-Study-Guide-Ch. - Fredericksburg City Schools
Ecology-Study-Guide-Ch. - Fredericksburg City Schools

... interactions between organisms and their ___________________, including relationships between living and ________________ things. All living things on Earth can be found in the ____________________, the portion of Earth that supports life. It extends from high in the ___________________ to the botto ...
Ecosystem Scavenger Hunt
Ecosystem Scavenger Hunt

... stony substance called Calcium Carbonate around them for protection. When the corals die, their empty outer skeletons form layers which cause the reefs to grow. They are found in coastal zones of warm tropical oceans.  Biogeochemical cycles- natural processes that recycle nutrients in various chemi ...
Ecology Unit Review Guide
Ecology Unit Review Guide

... Food chain: show how matter and energy transfer through an ecosystem Food web: shows all the interactions between trophic levels and organisms in an ecosystem Trophic level: a feeding step in a food chain 2. What are biotic factors? What are some examples? All the living organisms that inhabit an en ...
Feeding Relationships
Feeding Relationships

... Trophic Levels • Each link in a food chain is known as a trophic level. • Trophic levels represent a feeding step in the transfer of energy and matter in an ecosystem. ...
Notes on Living Things and Their Environment
Notes on Living Things and Their Environment

... 5. Abiotic – the nonliving things in the ecosystem. (ex: dirt, water, rocks, air, temperature, humidity, etc) 6. Biotic – the living things in the ecosystem. (ex: fish, frog, lily pad, cat tails, trees, whales, insects, etc) 7. Habitat - place in which organism lives. It provides food, shelter, & ot ...
Energy Transfer Notes - Mr. Shaw Life Science
Energy Transfer Notes - Mr. Shaw Life Science

... • Decomposers are organisms that feed on dead matter. • This allows nutrients/matter to be made available to the ecosystem. • Examples are: bacteria, worms, slugs, and fungi • Scavengers consumes the remains of dead animals. ...
Chapter 36: Population Growth Population Concepts
Chapter 36: Population Growth Population Concepts

... Summary of the Nitrogen Cycle Nitrogen fixation is one of the most important processes on earth! • converts nitrogen compounds in the atmosphere (mainly N2) to ammonium ions (NH4+) • nitrifying bacteria convert NH4+ to nitrate (NO3-), the most easily assimilated form of nitrogen for plants ...
Animals and Ecosystems behavioral adaptation
Animals and Ecosystems behavioral adaptation

... extinct -- the condition in which there are no more living members of a species food chain -- the path of food energy from the sun, to producer, to consumer food web -- the flow of energy from the sun through producers, consumers, and decomposers habitat -- the place or kind of place in which an ani ...
Key Unit 9 Study Guide
Key Unit 9 Study Guide

... 10. Define: Primary Consumer, Secondary Consumer, Tertiary Consumer, and Quaternary Consumer. Primary consumers eat plants, secondary consumers eat primary consumers, tertiary consumers eat secondary consumers, and quaternary consumers eat tertiary consumers. Some organisms may be in two or more tro ...
File
File

... Vulnerable carnivores • Read the case study of the snow leopard on ...
Name date ______ class
Name date ______ class

... 1. _Biotic____- all of the living things found together that interact with one another such as: __animals_, __plants_& __bacteria__ 2. _Abiotic____- non-living parts of the environment including all of the physical factors such as:  _sunlight___  _Climate__ - average weather conditions in an area ...
The Biosphere Summary
The Biosphere Summary

... 3. * Give an adverse affect of using fossil fuel and nuclear power as an energy source. ____________________________________________________________________ ____________________________________________________________________ 4. * Describe one way in which pollution can be controlled. ______________ ...
Communities and Ecosystems 5.1
Communities and Ecosystems 5.1

... •State that light is the initial energy source for almost all communities •Explain the energy flow in a food chain •State that energy transformations are never100% efficient •Explain reasons for the shape of pyramids of energy •Explain that energy enters and leaves ecosystems, but nutrients must be ...
Slide 1
Slide 1

... • All of the organisms and the non-living environment found in a particular place • What would be included in a pond’s ecosystem? ...
UNIT 7 – EVOLUTION - BaysideFastTrackBiology2015
UNIT 7 – EVOLUTION - BaysideFastTrackBiology2015

...  Nutrients cycle through an ecosystem. The most common examples include carbon, oxygen, nitrogen, and water.  Ecosystems demonstrate an exchange of energy and nutrients among inhabiting organisms. Only about 10% of the energy of the energy available within one tropic level is transferred to organi ...
Comparative ecosystem dynamics
Comparative ecosystem dynamics

... resilient to exploitation effects (Myers et al. 1997) • Species richness acts through compensatory effects where the probability that a depleted species will be replaced by another is higher (e.g.Shackell and Frank ...
Chapter 5.1
Chapter 5.1

... energy is transferred in a food chain  Each time energy is transferred from one organisms to another, some of the energy is lost as heat and less energy is available to organisms at the next tropic level  About 90% of energy at each trophic level is used up, remaining 10% is all that is available ...
Ecology Lesson
Ecology Lesson

... with its organisms, their interactions, and the physical and chemical factors that affect them  Community = populations of different species that interact in an ecosystem  Population = all the individuals of the same species living in a community ...
rss_ecology_lesson
rss_ecology_lesson

... with its organisms, their interactions, and the physical and chemical factors that affect them  Community = populations of different species that interact in an ecosystem  Population = all the individuals of the same species living in a community ...
Ecology ppt
Ecology ppt

... Trophic Levels Biomass- the amount of organic matter comprising a group of organisms in a habitat. • As you move up a food chain, both available energy and biomass decrease. • Energy is transferred upwards but is diminished with each transfer. Only 10% of energy is moved from one level to the next ...
Food Web Control of Primary Production in Lakes
Food Web Control of Primary Production in Lakes

... Carpenter and associates further tested the hypothesis by directly fertilizing lakes (bottom-up controls) that had contrasting food webs. Algal biomass accumulated in one of their study lakes with an abundance of zooplantivorous fishes and small species of zooplankton grazers. In another study lake ...
Ecology Food Chains and Food Webs
Ecology Food Chains and Food Webs

... Top consumer that typically eat 3rd level consumers for energy Typically has no natural predators Example: Lion, hawk, killer whale ...
LIFE IN THE FOOD WEB - Grouper Education Program
LIFE IN THE FOOD WEB - Grouper Education Program

... check. The health of the reef is dependent on the delicate balance between herbivores, which feed on algae, and organisms that feed on coral and carnivorous predators. ...
Name: Date: ______ Class
Name: Date: ______ Class

... Short response (6points each) If the snake required 150 Kcal of energy, what is the minimum amount of energy that would have to be stored in the producers? Explain your answer. ...
Ecological Pyramids Notes
Ecological Pyramids Notes

... energy decreases for higher consumers •  Amount of available energy decreases down the food chain •  It takes a large number of producers to support a small number of primary consumers •  It takes a large number of primary consumers to support a small number of secondary consumers ...
< 1 ... 128 129 130 131 132 133 134 135 136 ... 179 >

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.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report