Interactions - Interactions , temperature changes...

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Interactions classical limiting factors  - abiotic, organisms must conform or regulate themselves temperature - changes biochemical structure/function, influence chemical reaction rate o ectotherm (poikilotherm) - cold-blooded w/ slower metabolisms o endotherm (homeotherm) - warm-blooded o heterotherm - regulators that don’t always regulate themselves o Thermal Primacy Paradigm - every organism must deal w/ temperature oxygen - doesn’t follow same patterns as temperature o facultative anaerobes - needs oxygen to reproduce, doesn’t need it to survive water - can have too much or too little o used to adjust solute content pressure - lighter substances float, heavier ones sink light - needed in some form by most organisms pH - primarily w/ halophiles o no organism can handle 0 or 14 pH responses to environmental change  - passive - no response o either no point, no need, or response will lead to worse conditions o maybe inability to sense the change behavioral
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