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BIO1B Ecology Notes - Powers
bio1b powers
20
Biology
Undergraduate 2
11/05/2008

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Term
Performance Graph
Definition
Non-Linear Across Range of intensities of abiotic conditions. Functions at optimal (whether alot, a little, or middle)
Term
Niche
Definition
Range of condtions (resource level, densities of other specieis) which an organism or species can survive and reproduce. (N dimensional if each condition, resource, or species can be seen as dimensions)
Term
Fundamental Niche

Realized Niche
Definition
Fundamental: largest niche (conditions) in which species can persist in absence of adverse interactions.

Realized: generally smaller niche volume occupied by a species when there are interspecific interactions
Term
Relict Population
Definition
REsidual population left over from time when environment could support its survival and reproduction, which can no longer replace itself locally
Term
Sink Habitat
Definition
Habitat where death rates exceed birth rates, and organisms are present only because of immigration from source habitats.
Term
Resource Subsidy
Definition
Resources produced in one habitat that support consumers in a second habitat
Term
Homeostasis
Definition
maintaining internal state with a narrow range of conditions than external environment
Term
Acclimatization
Definition
an organism that shifts responses due to a condition caused by the external factors it has experienced in the past.
Term
Ectotherms vs Endotherms
Definition
Ectotherms rely on external sources of heat to regulate temperature

Endotherms generate own metabolic heat and production to regulate temperature
Term
Temperature Effects (how they affect organisms)
Definition
Governs rate of development and growth in ectotherms.

Is a cue for seasonal life cycle events
Term
Life History
Definition
Organism's lifetime pattern of growth, differentiation, storage, reproduction
Term
Life Cycle
Definition
Sequence of stages through which organism passes to develop from zygote to reproductive adult to make more zygotes
Term
Propagule
Definition
Individual group or biotic fragment that can potentially begin a new population
Term
Unitary vs Modular organisms
Definition
Unitary: develop from zygote to adult with determinant form

Modular: grow by repeated interactions of its parts into an adult of indeterminate form (ie: coral, poison oak)
-Genet: genetic individual, all the biomess that derived from single embryo
-Ramet: subunit of genet that is physiologically viable as autonomous fragment
Term
John Sabo
Definition
Lizard research, finding lizards live more in cobble rocks than in meadow due to better temperature regulations or lack of predators
Term
Demography
Definition
Study of how vital rates of individuals affect structure and dynamics of populations
Term
Population
Definition
group of potentially interbreeding individuals (same species, co-occur in time and space)
Term
R- Selection
Definition
Density Independent natural selection. Maximize reproductive success in uncrowded area.

Short life, small size, high predator vulnerability, weak competitor, good dispensor, many small offspring, early reproduction (ie: rabbits)
Term
K-Selection
Definition
Density-Dependent. Sensitive to density dependent selection

long life span, large size, low vulnerability to predators, strong competitor, slower disperser, fewer but better provisioned offspring, late reproduction (ie: humans)
Term
Ecologic Niche
Definition
Sum total of species' use of the biotic and abiotic resources in its environment
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