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2.6.1-.4, 2.1.7 Population Dynamics - DAVIS-DAIS
2.6.1-.4, 2.1.7 Population Dynamics - DAVIS-DAIS

... A look at the factors that tend to increase or decrease the size of a population. ...
Ground Rules, exams, etc. (no “make up” exams) Text: read
Ground Rules, exams, etc. (no “make up” exams) Text: read

competitive exclusion principle
competitive exclusion principle

... This has been famously measured for populations of lynx (predator) and hare (prey) in Canada, and can also be demonstrated in a lab experiment using two species of mite: Eotetranchus (a herbivore) and Typhlodromus (a predator). If the population of the prey increases, the predator will have more foo ...
File
File

...  An area is defined and the quadrat is randomly placed inside (creating random number tables based on grids can reduce human bias)  The number of individuals of a given species within the quadrat is counted and then the process is repeated for different areas  Smaller quadrats must be placed more ...
Land Resource Issues - Winona State University
Land Resource Issues - Winona State University

...  Fuelwood ...
Biology Test
Biology Test

... ________ 10. An organism’s niche is A. the way the organism uses the range of physical and biological conditions in which it lives B. all the physical and biological factors in the organism’s environment C. the range of temperatures that the organisms need to survive D. a full description of the pl ...
Glossary
Glossary

... Decomposition: Breaking down organic material, such as dead plant or animal tissue, into smaller molecules that are available for use by the organisms of an ecosystem. Ecological Value: Vital component of the key ecosystem functions of energy flow, nutrient cycling, and population control. Ecosystem ...
An Introduction to Ecology and the Biosphere
An Introduction to Ecology and the Biosphere

Populations and Resources
Populations and Resources

... An organisms’ need for space depends on their size, environment, and way of life. Different species have different needs for space. This need for space determines how many individuals of a given species can live in the same area at the same time. Factors affecting population size may be: 1. Density- ...
Unit 10 Study Guide Answers
Unit 10 Study Guide Answers

... How would the species change from 5 years after to 20 years after the eruption? What could limit the rate of succession at any stage? It could level off and may eventually decline. Density Dependent and Independent factors ...
Population dynamics
Population dynamics

15 Competition 2008
15 Competition 2008

... MAJOR CONCEPTS 1) Facilitation is the alternative to competition; it is understudied. 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intra ...
Communities and Ecosystems
Communities and Ecosystems

... provide themselves with energy and organic matter necessary for growth and survival. ...
15 Competition 2008
15 Competition 2008

... MAJOR CONCEPTS 1) Facilitation is the alternative to competition; it is understudied. 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intra ...
Bio Chapter 21 Community Ecology
Bio Chapter 21 Community Ecology

... irritating, or bad-tasting  Many plant chemicals are used for ...
Changes to the Environment
Changes to the Environment

... • Secondary succession – occurs after a preexisting climax community has been partially or completely destroyed • Natural disasters • Land cleared for harvest or construction • Occurs where soil is already present ...
TakeHometest - MabryOnline.org
TakeHometest - MabryOnline.org

... All of the following are examples of limiting factors EXCEPT a. food. b. soil. c. space. d. weather conditions. An organism's particular role, or how it makes its living, is called its a. carrying capacity. b. ecosystem. c. competition. d. niche. The behaviors and physical characteristics of species ...
Chapter 4 Outline – Population Dynamics
Chapter 4 Outline – Population Dynamics

... 4. Organisms mature rapidly 5. Reproduce early 6. Organisms have a short life span B. Slow life history (e.g. elephant) 1. Slow reproduction 2. Low number of offspring 3. Large body size 4. Organisms mature slowly 5. Reproduce late 6. Organisms have a long life span 7. Organisms tend to have parenta ...
Population Biology - Salisbury Composite High
Population Biology - Salisbury Composite High

... R and K Population Strategies  This ...
Calculations - Salisbury Composite High School
Calculations - Salisbury Composite High School

Quiz 1 – Lectures 1-5. Brainstorm. 1. Introduction: a. Natural Capital
Quiz 1 – Lectures 1-5. Brainstorm. 1. Introduction: a. Natural Capital

... v. Large vs. small populations: adaptability and genetic drift vi. Coevolution vii. Convergent evolution 4. Ecology: engineer’s perspective, “structure & function” a. Matter & Energy in ecosystems i. Matter: nutrient cycling ii. Energy: photosynthesis/respiration, ecological efficiency b. Types of e ...
Lecture 6
Lecture 6

... species whose impact on its community or ecosystem is much larger and more influential than would be expected from mere abundance.  eg, Top Predators or? Often, many species are intricately interconnected so that it is difficult to tell which is the essential component. Perhaps ‘keystone set’.  Mu ...
15 Competition 2010
15 Competition 2010

... faculty member with whom to work, and how to use this experience to apply for graduation with distinction. Fellow IB students who have done IB 390 or 490 will share their experiences as well. ...
Interrelationships Between Organisms
Interrelationships Between Organisms

... • Competition: relationship that occurs when 2+ organisms need the same resource at the same time – It can be between members of the SAME or DIFFERENT species – Usually occurs with organisms that share the same niche • Niche: role of an organism in its environment, including the food it eats, how it ...
File - Pace Ap Environmental Science
File - Pace Ap Environmental Science

... under ideal conditions – Larger organisms tend to have low potential ...
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Storage effect

The storage effect is a coexistence mechanism proposed in the ecological theory of species coexistence, which tries to explain how such a wide variety of similar species are able to coexist within the same ecological community or guild. The storage effect was originally proposed in the 1980s to explain coexistence in diverse communities of coral reef fish, however it has since been generalized to cover a variety of ecological communities. The theory proposes one way for multiple species to coexist: in a changing environment, no species can be the best under all conditions. Instead, each species must have a unique response to varying environmental conditions, and a way of buffering against the effects of bad years. The storage effect gets its name because each population ""stores"" the gains in good years or microhabitats (patches) to help it survive population losses in bad years or patches. One strength of this theory is that, unlike most coexistence mechanisms, the storage effect can be measured and quantified, with units of per-capita growth rate (offspring per adult per generation).The storage effect can be caused by both temporal and spatial variation. The temporal storage effect (often referred to as simply ""the storage effect"") occurs when species benefit from changes in year-to-year environmental patterns, while the spatial storage effect occurs when species benefit from variation in microhabitats across a landscape.
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