Ecology Flashcards
Carrying Capacity
maximum number of species an environment can support
Symbiosis
long term relationship between 2 different species (3 types)
Mutualism (symbiosis)
benefit for both (+/+)
Commensalism (symbiosis)
benefit for one, neutral for other (+/o)
Parasitism (symbiosis)
benefit for one, costly for other (+/-)
Exponential Growth
populations growth rate stays the same regardless of population size (population grows faster as it gets larger)
Logistic Growth
population grows a lot at first, slows down as population size approaches carrying capacity
Biosphere
region of earth that encompasses all living organisms; plants, animals, bacteria
Ecosystem
group of living organisms that live/interact with eachother in a specific environment
Community
diverse group of organisms that interact in a common location
Population
organisms of same group/species that live in a specific are and can breed among themselves
Niche
role an organisms plays in a community
Herbivore
organism that only eats plants
Carnivore
organism that mostly eats meat/flesh of animals
Autotroph
organism that can produce own food using light, water, C02, other chemicals
Heterotroph
organism that eats other plants/animals for energy
Food Web
multiple food chains
Food Chain
one basic food chain
Energy Pyramid
shows how energy moves through trophic levels
10% Rule
energy passed from one trophic level to the next, only 10% of energy passed on
Succession
process by which a mix of species/habitat in an area changes overtime
Primary Succession
newly formed are is inhabited for the first time by group of species
Secondary Succession
happens when intermediate community is impacted by a disturbance
Decomposers in Ecosystem
break apart dead organisms into simpler materials (making nutrients available to primary producers)
Population Data Graph
line graph
Density Dependent Factors
varying impacts according to population size; different species population in same ecosystem will be affected differently
Density Independent Factors
not influenced by species population size