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... • The study of the interactions of organisms with other organisms and with the physical environment. • Studies life on many different levels—from individual organisms to the biosphere. ...
Types of Life - Mercer Island School District
Types of Life - Mercer Island School District

Interspecific Dynamics
Interspecific Dynamics

... familiar. Many species of birds fly south more because of food shortages, rather than cold temperatures. ...
B 262, F 2002 Name
B 262, F 2002 Name

... SHORT ESSAYS.For the following essays, address each question in as concise and lucid a manner as possible. Do NOT exceed the space provided. (20%) 1. Two bacteria, Yersina pestis, the black plague bacterium, and Mycobacterium tuberculosis, the tuberculosis bacterium, killed many Europeans in the M ...
Entomology`s Ecology Test
Entomology`s Ecology Test

... A) Its need to find different foods to eat  B) The change in an abiotic factor in its environment  C) The caribou’s need to find a new habitat  D) The change in a biotic factor in its environment  ...
Ecology Unit UPCO
Ecology Unit UPCO

...  Competition occurs when there is a struggle for the same limited resources.  Competition may eventually cause one species to become extinct.  Competition usually establishes one species per niche in a community. ...
Population Ecology - HRSBSTAFF Home Page
Population Ecology - HRSBSTAFF Home Page

... particular combination of biotic and abiotic characteristics. Organisms adapt to the habitats within which they usually live. • Ex: The taiga (Boreal forest) biome covers a large part of central and northern Canada, Europe and Asia. From the North to the South and from the East to the West, the taig ...
r-selection
r-selection

... • Metapopulation is a level between the organism and the population levels of organization • Defined as subpopulations occupying discrete patches or islands of suitable habitat that are separated by unsuitable habitat but connected by dispersal corridors. • Groups of individuals in each discrete pat ...
Schedule
Schedule

... had to adapt to their new environmental conditions, with A. lyalli having cooler conditions and A. sinclairii having warmer conditions. Because they are geographically isolated no gene flow occurs between the two groups. This causes them to form two genetically different populations, which are no lo ...
42KB - NZQA
42KB - NZQA

... had to adapt to their new environmental conditions, with A. lyalli having cooler conditions and A. sinclairii having warmer conditions. Because they are geographically isolated no gene flow occurs between the two groups. This causes them to form two genetically different populations, which are no lo ...
Community Ecology Chapter 54
Community Ecology Chapter 54

... 1. Interspecific interactions are between organisms of different species in a community. Examples include Competition, Predation, and Symbiosis. Community interactions are classified by whether they help, harm, or have no effect on the species involved. 2. Interspecific interactions can affect the s ...
decreases come from deaths and emigration. Carrying Capacity It is
decreases come from deaths and emigration. Carrying Capacity It is

... •Technological, social and other cultural changes have extended human’s range - but how long will it last? ...
17Molles5e
17Molles5e

...  Apparent competition ...
Amy Thomson - Biology Department | UNC Chapel Hill
Amy Thomson - Biology Department | UNC Chapel Hill

Chapter 06_lecture
Chapter 06_lecture

... Population size- the total number of individuals within a defined area at a given time. (California Condor) Population density- the number of individuals per unit area at a given time. (hunting/fishing zones) Population distribution- how individuals are distributed with respect to one another. Popul ...
to Five Relationships - Naturally
to Five Relationships - Naturally

... 2. Explain to students that they are going to get a set of cards that have the names of the types of relationship on them. A second set of cards will have two organisms named on them, representing a type of relationship. 3. Divide class into four groups and distribute a complete set of relationship ...
Human Impact On the Earth
Human Impact On the Earth

... Although DDT was suspected, the levels to which the birds had been exposed were nowhere near high enough to have killed them. But when the bird's bodies were analyzed, they were found to have up to one million times the concentration that was present in the sprayed water. This led to the discovery o ...
basics of the environment: ecology
basics of the environment: ecology

... Justin Ray M Guce ...
Animal and Human Overpopulation
Animal and Human Overpopulation

... overpopulation, at least in the short term. In fact, an abundant supply of the resources can produce a population boom that ends up with more individuals than the environment can support. In this case, starvation, thirst and sometimes violent competition for scarce resources may effect a sharp reduc ...
Community Ecology
Community Ecology

... number of individuals of each species that can coexist at equilibrium. When the L-V equations are given various values and graphed, a very informative series of figures can be generated (plotting number of species 2 vs. species 1). (See handout.) The space within a figure represents a combination of ...
Characteristics of population growth pp
Characteristics of population growth pp

... population size or density Ex: competition for food or shelter predation disease/parasites spread easily in dense populations, may wipe out small populations ...
Topic 2 - Ecology
Topic 2 - Ecology

... (giant seaweed, a protist) is a major source of food and shelter for the ecosystem. Some species of crabs, snails, and geese depend on kelp for food. Many types of fish use the huge kelp forests to hide from predators. Without sea otters to control the urchin population, the entire ecosystem would c ...
PopulaitonGrowth
PopulaitonGrowth

... – Draw a line through the middle of steady state – carrying capacity – Carrying capacity is the average of the steady state – Factors at this point keep the population from getting any bigger – food, overcrowding, competition ...
density-independent limiting factors
density-independent limiting factors

... – Draw a line through the middle of steady state – carrying capacity – Carrying capacity is the average of the steady state – Factors at this point keep the population from getting any bigger – food, overcrowding, competition ...
biodiversity - Teacher Notes
biodiversity - Teacher Notes

... Anaerobic prokaryotes-> photosynthetic prokaryotes>aerobic prokaryotes-> eukaryotes-> multicellualr organisms ...
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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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