Entry Task - Steilacoom School District
... Why is a food web a more accurate representation of the feeding relationships in an ecosystem than a food chain? • Organisms are rarely food or feed on just one other organisms. • Food chains are simple, but feeding interactions are rather complex • Many different feeding relationships exists betwee ...
... Why is a food web a more accurate representation of the feeding relationships in an ecosystem than a food chain? • Organisms are rarely food or feed on just one other organisms. • Food chains are simple, but feeding interactions are rather complex • Many different feeding relationships exists betwee ...
11/17: Food Chains
... Heterotrophs – Those organisms that can not make their own food. Must eat other things, and so are also called Consumers. Examples of Consumers ...
... Heterotrophs – Those organisms that can not make their own food. Must eat other things, and so are also called Consumers. Examples of Consumers ...
Vocabulary for test on 3/16/15
... which one organismbenefits and the other is generally harmed. Commensalism A symbiotic relationship between two organisms of different species in which one derivesbenefit without harming the other. Predation a relationship between two species of animal in a community, in which one (the predator) hun ...
... which one organismbenefits and the other is generally harmed. Commensalism A symbiotic relationship between two organisms of different species in which one derivesbenefit without harming the other. Predation a relationship between two species of animal in a community, in which one (the predator) hun ...
invasive species
... – Mainly from symbiotic bacteria – Ammonification-nitrogen fixation that makes NH3 (ammonia) from N2 gas. Denitrification- bacteria release N2 gas into atmosphere ...
... – Mainly from symbiotic bacteria – Ammonification-nitrogen fixation that makes NH3 (ammonia) from N2 gas. Denitrification- bacteria release N2 gas into atmosphere ...
Trophic Levels
... • Blocks are stacked on top of one another, with the lowest trophic level on the bottom. The width of each block is determined by the amount of energy stored in the organisms at that trophic level. Because the energy stored by the organisms at each trophic level is about one-tenth the energy stored ...
... • Blocks are stacked on top of one another, with the lowest trophic level on the bottom. The width of each block is determined by the amount of energy stored in the organisms at that trophic level. Because the energy stored by the organisms at each trophic level is about one-tenth the energy stored ...
Ecology day 1
... live in an area together. All the organisms living in one place and the environment (biotic & abiotic). A collection of multiple ecosystems under the same climate. All parts of the Earth that support life. ...
... live in an area together. All the organisms living in one place and the environment (biotic & abiotic). A collection of multiple ecosystems under the same climate. All parts of the Earth that support life. ...
African Savanna Background Information
... a complex food web. A community is a group of organisms interacting in a specific region under similar environmental conditions. A food chain is a group of organisms linked in order of the food they eat, from producers to consumers, prey to predators, and scavengers to decomposers. The arrows in a f ...
... a complex food web. A community is a group of organisms interacting in a specific region under similar environmental conditions. A food chain is a group of organisms linked in order of the food they eat, from producers to consumers, prey to predators, and scavengers to decomposers. The arrows in a f ...
Communities and Ecosystems
... Community - Assemblage of all interacting species of organisms in an area. Ecosystem - Defined space in which interactions take place between a community, with all its complex interrelationships, and the physical environment. ...
... Community - Assemblage of all interacting species of organisms in an area. Ecosystem - Defined space in which interactions take place between a community, with all its complex interrelationships, and the physical environment. ...
Ecology and Food Chains
... They decompose (break down) dead organic material and return important nutrients to the soil which helps plants grow. Ex. : Bacteria and mushrooms ...
... They decompose (break down) dead organic material and return important nutrients to the soil which helps plants grow. Ex. : Bacteria and mushrooms ...
Answers
... Interactions between organisms Complete the following sentences using appropriate words or short phrases a) Energy is usually lost in an ecosystem in the form of ……….. ...
... Interactions between organisms Complete the following sentences using appropriate words or short phrases a) Energy is usually lost in an ecosystem in the form of ……….. ...
Chapter 3: Matter, Energy and Life
... • Due to the Second Law of Thermodynamics, energy is lost at each level of the pyramid. • 10% Rule (Energy / Biomass) - as an organism is consumed, about 90% of the energy at each trophic level is lost or used up along the way (as heat in metabolic processes). • Only about 10% of the energy becomes ...
... • Due to the Second Law of Thermodynamics, energy is lost at each level of the pyramid. • 10% Rule (Energy / Biomass) - as an organism is consumed, about 90% of the energy at each trophic level is lost or used up along the way (as heat in metabolic processes). • Only about 10% of the energy becomes ...
Ecology PowerPoint
... and biotic (living) factors in an area • Together they influence growth, survival, and productivity of an organism ...
... and biotic (living) factors in an area • Together they influence growth, survival, and productivity of an organism ...
ADAPTATION: RELATIONSHIPS IN NATURE
... unaffected. • Sea anemone provides food and shelter; fish provides nothing. ...
... unaffected. • Sea anemone provides food and shelter; fish provides nothing. ...
Preston et al. 2012 Food web data
... are often omitted from freshwater food webs: inclusion of (1) parasites and other infectious agents, (2) ontogenetic stages of most animals with complex life cycles, and (3) biomass information for many animals. Data on species presence was obtained over three years using field sampling techniques (i ...
... are often omitted from freshwater food webs: inclusion of (1) parasites and other infectious agents, (2) ontogenetic stages of most animals with complex life cycles, and (3) biomass information for many animals. Data on species presence was obtained over three years using field sampling techniques (i ...
Ecology Study Guide – ANSWERS!
... Organisms that create their own food 4. What are primary and secondary consumers? Primary consumers are herbivores. Secondary consumers are omnivores or carnivores. 5. What is a food web? Food chain? Food Web – Interconnected complex model showing the interaction tracing the flow of energy from prod ...
... Organisms that create their own food 4. What are primary and secondary consumers? Primary consumers are herbivores. Secondary consumers are omnivores or carnivores. 5. What is a food web? Food chain? Food Web – Interconnected complex model showing the interaction tracing the flow of energy from prod ...
Trophic Levels in Food Chains and Webs (Chap. 46)
... • forests – Closed communities have more definite borders and therefore few organisms pass ...
... • forests – Closed communities have more definite borders and therefore few organisms pass ...
Energy Flow - Mr. Tyrrell
... Energy Flow • Energy in an ecosystem originally comes from the sun • Energy flows through Ecosystems from producers to consumers – Producers (make food) – Consumers (use food by eating producers or other consumers) ...
... Energy Flow • Energy in an ecosystem originally comes from the sun • Energy flows through Ecosystems from producers to consumers – Producers (make food) – Consumers (use food by eating producers or other consumers) ...
Food Web activity guidance
... Working together, students arrange the cards or pictures into a food web. First the cards need sorting into three rows, plants, herbivores and carnivores. When an animal eats both plants AND other animals, it should be added to the carnivore layer. The first two rows, plants and herbivores, can be s ...
... Working together, students arrange the cards or pictures into a food web. First the cards need sorting into three rows, plants, herbivores and carnivores. When an animal eats both plants AND other animals, it should be added to the carnivore layer. The first two rows, plants and herbivores, can be s ...
TERRESTRIAL ECOLOGY STUDY GUIDE
... 1. What is biomass? 2. State and explain the law of conservation of matter. 3. What is a trophic level? 4. What happens to biological production and biomass as energy flows up a food chain? 5. What does it mean to “eat lower in the food chain?” 6. What is ecological succession? 7. List examples of e ...
... 1. What is biomass? 2. State and explain the law of conservation of matter. 3. What is a trophic level? 4. What happens to biological production and biomass as energy flows up a food chain? 5. What does it mean to “eat lower in the food chain?” 6. What is ecological succession? 7. List examples of e ...
Year 12 Ecology Flashcards - Miss Jan`s Science Wikispace
... Secondary consumers Decomposers Ecological Predation Food Chain Trophic Level Producer/ Autotroph Herbivore Ecosystem Food Web Commensalism Pyramid of biomass Photosynthesis Respiration Energy flow Pyramid ...
... Secondary consumers Decomposers Ecological Predation Food Chain Trophic Level Producer/ Autotroph Herbivore Ecosystem Food Web Commensalism Pyramid of biomass Photosynthesis Respiration Energy flow Pyramid ...
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.