Ecology notes 2 and 3

Nutrient

substances that organsims need to build and repair

Energy

something organsims need to grow

carbohydrates

made from carbon, hydrogen and oxygen

protein

nitrogen

fats

carbon hydrogen

nutrient cycle

the process of moving a nutrient between biotic and abiotic

photosynthesis

convers co2 into plant tissue

formula for photo

Carbon dioxide gas + water + sunlight -> oxygen + glucoses

carbon cycle

cellular respiration

its a process animals do to realease co2 into atmosphere

the three biotic interactions

competion, predation, symbiosis

competition

2 or more organsims competing for the same resource, can be food water or shelther. if they are similiar, they have differnet niches

predation

one organism eats another, prey have defense mecansims to stop it

3 defense mecansims

tasting horrible, camoflauge, mimicry

symbiosis

interactions between two species where one lives on/in the other

mutualism

both species benefit from the interactions (+/+)

commensatism

one species benefits and other is unaffected (+/0)

parasitism

one species benefits and other is harmed (+/-)

charaterstics of populations

as pop gorws, there will be more births then death. the resources will diminish aswell and that leads to death for some organsims. then death will be higher then birth

Equilibrium

when the amount of deaths equal the births (populations)

carrying capacity

the maximum number of resources a ecosystem can sustain.

limiting factors

something that prevents an increase to population or for them to move to new habitats. can be biotic or abiotic.