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Ecology
Exam #2
44
Biology
Undergraduate 3
02/23/2015

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Term
Population is characterized by... (2)
Definition
Number of individuals and density
Term
Niche
Definition
Summarizes environmental factor, that influence growth, survival and reproduction of a species
Term
Grinell
Definition
Defined niche with a focus on the effects of the physical environment
Term
Elton
Definition
Defined niche with a focus on abiotic and biotic factors
Term
Hutchinson
Definition
Defined niche as n-dimensional hyper-volume (n equates the number of environmental factors important to survival and reproduction of a species)
Term
Fundamental niche
Definition
Hypervolume (possible niche)
Term
Realized niche
Definition
Includes interactions such as competition from other species AKA the actual niche of the species
Term
Hypervolume
Definition
The fundamental/possible niche
Term
Caughley
Definition
Found a close relationship between climate and distribution of the three largest kangaroos in Australia
Term
Climate often influences species distributions via (4)
Definition
Food production, water supply, habitat, or incidence of parasites, pathogens or competitors
Term
Schultz
Definition
Found metabolic rates of tiger beetle are higher and preferred temperatures lower than most other species, supports that environment limits species distribution
Term
Connell
Definition
Found barnacles were restricted to upper levels while other barnacles were limited to middle and lower levels
Term
Difference between Balanus and Chthalamus (barnacles)
Definition
Balanus is more vulnerable to dessication, limiting it to the lower areas
Term
Why isn't Chthalamus (barnacle) present in lower intertidal zones?
Definition
Competition from Balanus
Term
Random distribution
Definition
Equal change of being anywhere with uniform distribution of resources
Term
Regular distribution
Definition
Uniformly spaced with exclusive use of areas (individuals avoid one another)
Term
Clumped distribution
Definition
Unequal change of being anywhere, usually orientated around a resource or attraction between individuals
Term
Population
Definition
A group of individuals of a single species inhabiting a specific area
Term
Abundance
Definition
The total number of individuals or biomass of a species in a specific area
Term
Hubbell and Johnson
Definition
Studied distribution of tropical bee colonies
Term
Phillips and MacMahon
Definition
Found that the distribution of desert shrubs changes from clumped to regular as they grow
Term
Brisson and Reynolds
Definition
Found competitive interactions with neighboring shrubs influence distribution of roots
Term
Root
Definition
Found that North American bird populations were clumped in the winter
Term
Brown
Definition
Found that North American bird populations showed a clumped distribution during breeding season
Term
Whittaker
Definition
Found that woody plants have a clumped distribution along a moisture gradient
Term
Peters and Wassenb0erg
Definition
Found that aquatic invertebrates have higher population densities than terrestrial invertebrates of similar size
Term
Rabinowitz
Definition
Devised classification system for rarity
Term
Holling
Definition
Found that increased prey density led to increased density of predators
Term
Muller
Definition
Presented the colonization cycle in which dynamic interplay between downstream and upstream dispersal maintains populations
Term
Murie
Definition
Collected Dall sheep skulls to determine high survival among the young
Term
Miller
Definition
Looked at age distribution of white oak
Term
Grant and Grant
Definition
Galapagos Finches
Term
Boag and Grant
Definition
Observed finch population fall from 1200 to 180 due to single drought
Term
Turner and Trexler
Definition
Found that fish clutches with small numerous eggs had less allelic variation than populations with fewer and larger eggs
Term
Westoby et. al.
Definition
Classified plants into four groups: graminoids, forbs, woody plants and climbers.
Classified six seed dispersal strategies.
Term
Jokobsson and Eriksson
Definition
Found that larger seeds were associated with higher recruitment
Term
Seiwa and Kikuzana
Definition
Found that larger seeds produced taller seedlings
Term
Shine and Charnov
Definition
Observed the different energy budgets of vertebrates before and after sexual maturity
Term
Gunderson
Definition
Found in fish that species with higher mortality show higher relative reproductive rate
Term
Bertschy and Fox
Definition
Found in sunfish that when adult survival is lower than juvenile survival natural selection allocates more resources to reproduction
Term
Winemiller and Rose
Definition
Developed life history classification system based on Ix, mx, and alpha
Term
Charnov
Definition
Removed variables of time and size to compare life histories
Term
Denno and Roderick
Definition
Determined intraspecific competition was influenced by habit of aggregating, rapid growth and mobile nature of food supply
Term
Gause
Definition
Came up with the Principle of Competitive Exclusion
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