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13 Cards in this Set
- Front
- Back
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Define 'allometrics' |
Small things grow faster |
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Do phytoplankton grow allometrically? |
There is no evidence that they do |
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Define 'stoichiometrics' |
Small cells have less space to accumulate stores |
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AEBE, re: biomass per source unit |
The same resource will support equal biomass, but a different number of cells |
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Discuss sedimentation |
Larger cells sink faster (Stokes Law) They also adhere more strongly; rapid sinking aggregates |
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Discuss motility |
Larger cells have less resistance, greater mobility, more speed and greater potential to locate nutrients and light |
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Discuss nutrient transport |
Capacity is limited by the number of porters per surface area. There is no evidence this limits growth. AEBE, smaller cells have greater excess capacity = lower Kg |
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Define 'diffusion limitation' |
To add to transporter capacitylimitation, at low [nutrient], nutrient supply may be limited by diffusion Movement decreases diffusionlimitation |
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Define 'leakage' |
[Metabolite] within cells is mM - leakage will occur. Smaller cells leak more; are better equipped to recover leakage |
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Discuss population self-shading |
Same resource will, in mixed water body, result in
Similar levels of PAR shading Similar levels of UV absorption |
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Discuss internal self-shading PAR |
Larger cells more subjected toself shading of PAR AEBE, larger cells will do lesswell under light-limiting conditions |
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Discuss internal self-shading UV |
Larger cells more able to shadeout damaging UV “sun screen" Larger cells will do betterunder high UV conditions |
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Discuss vacuolation |
Larger cells have more spacefor vacuolation Biomass density can be less;cost of being large decreased “Spare” space available forexcess nutrients C:N:P more variable, quotacurves extended Stoichiometrics |
