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25 Cards in this Set
- Front
- Back
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Relict Pop
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left over population from a time when it could replace itself locally
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Sink Hab
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hab. where death rates exceed birth rates>>only around due to immigration.
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resource subsidy
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resources from one hab, supprt org's from another.
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unitary org
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zygote to adult with determinant form (human)
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Modular Org
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repeated iterations of its parts into an indeterminant form
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Liebig's Law of the Minimum
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basically: weakest link determines the strength of the chain.
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Life history tradeoffs
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1-grow early>>risk freezing
2-lrgr seeds >>fewer seeds>>greater risk of predation and parasites 3-Dispersal-reduces comp w/ the prnt, might get unsuitable hab |
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r-selected traits
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-short life span
-small size -high predator vulnerability -weak compettr -good dispenser -many small offsprg -early repro |
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K-selected species
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-long life
-lrg size -lw vul to predators -strong competitor -slow disperser -fwer offspring -late repro |
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Reynolds Numbers
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-gauge that describes the viscosity and surface forces of fluids relative to body size. Humans experience high reynolds numbers and bugs ar low ones.
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Jim Elsner: Grwth rt hypoth
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-fast growth req many ribosomes
-rapid grwth req lots of rRNA -link btwn P and grwth rate -fast growing org's have low C:P and N:P ratios |
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C3 phtosynthesis
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-most common form
-CO2 fixed with N2 and P to make RUBISCO |
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C4 Phtosyn
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uses PEP carboxylase, lose less water, are less nutritious, dont do well in the shade
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CAM ptosyn
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-cacti and succulents
-stomata only open at night -conserves water |
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heterotherms
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intermediate form in between ecto and endo therms
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Competition Types
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1-Exploitative
2-Interferrence 3-Apparent |
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Exploitative Comp.
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2 species compete for a resource that is limiting
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Interferrence Comp.
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2 species directly harm each other
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Apparent Comp.
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2 species decrease in abundance b/c they support the emergence of a common predator.
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hemiparasite
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plants that just derive water and nutrients but NOT carbon from the host.
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Parasitoids
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insects that lay eggs in living hosts, eventually killing them.
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Direct Interferrence
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intraspecific or interspecific territoriality. (involves 2 species interacting)
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Indirect Mutualism
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intra-competing species inadvertently helping another species.
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partial predation
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grazing or browsing
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ZNGI
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zero net growth isoclines
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