unit 1
mutalism , commensalism , parasitsm .
what is an ecosystem ?
a system formed by the interaction of a community of organsims and their physical environment
what is population density ?
what is a transform boundry ?
when plates move sideways past eachother creating faults.
what is the tragedy of the commons ?
the tendency of shared limited resources to become depleted as people act off of self interest.
Tiaga , temperate rain forest , temperate seasonal forest , tropical rain forest , shrub land , temperate grass land , savanna, dessert ,tundra
what is abiotic vs biotic factors ?
biotic : living factor
what is the bottleneck affect ?
when few individual survive a catostrophic event
what is the top layer of soil of earth called ?
crust
what is maximum sustainable yield ?
the maximum amount that can be harvested from another resource without comprimising its future availiability .
describe the difference specialist vs genaralist
an animal which feeds on dead organic material
the maxium reproductive capacity a organsim has under optimum circumstances
weathering is breakdown of rocks , erosion is the removal of the rock from its landscape.
what is forestry ?
the science of establishing using and conserving forests
what is a key stone species
an important organism from an ecosystem , that when removed the ecosystem will eventually collapse
what are all the "spheres " of earth
atmosphere , troposphere , stratosphere , lithosphere , biosphere
what is intrinsic rate of increase?
the rate at which a population of a species would grow if they had unlimited resources
what is a hotspot ?
a large plume of hot mantle material ie: magma rising deep within the earth
the removal of all or most trees within an area
what is biomagnification ?
the more you go up in a food chain the more toxins you'll have in your body
what is anarobic respiration ?
respiration in the absence of oxygen and this produces lactic acid
what are the 3 types of population distribution?
clumped , uniform , random
what is the relationship between soil texture and water?
if theres more sand in soil , more water will be able to penetrate it ; the more clay in soil the less water can penetrate it
what is food insecurity ?
when people have an adaquate access to food.