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AP Biology: Ecology Flashcards

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4915268034ecologyscientific study of interactions between organisms and environment0
4943359365community ecologyecology of communities, or groups of individuals of different species1
4915366353biomea large community of plants and animals in a distinct region2
4915387896Tropical rain forestNear equator, high humidity, trees with canopies3
4915392413DesertTemperature fluctuation, plants that germinate after hard rain4
4915397212Temperate Grasslandslow annual rainfall, no forests5
4915401471temperature deciduous foresttrees drop leaves in winter, species live close to ground6
4915411667Conifer Forest/TaigaConifer (evergreen) forests, cold winters, heavy snowfall, large mammals7
4915432492Tundralittle rainfall, "frozen desert," permafrost8
4915408781order of biomes from equator to North Poletropical rain forest, desert, grasslands, temperate deciduous forest, taiga, tundra9
4915270939intraspecificinteractions within species10
4915290553interspecificinteraction between different species11
4915293130competitive exclusion principleTwo species cannot coexist in a community if their niches are identical12
4915298489ecological nichespecies use of biotic/abiotic resources in environment13
4915302476aposematic colorationcoloring that warns predators/prey14
4915309323cryptic colorationcoloring that allows the organism to hide15
4915312207Batesian mimicryharmless species resemble harmful species16
4915314430Mullerian mimicrytwo or more unpalatable species resemble eachother17
4915322265ParasitismOne organism benefits and the other suffers18
4915322266Examples of Parasitismlice, tapeworms, ticks19
4915326640CommensalismOne organism benefits and the other is not affected20
4915326641Examples of CommensalismBarnacles on whale, anenomes and clownfish21
4915326642MutualismBoth organisms benefit22
4915329619Examples of mutualismFlowers and bees, people and plants23
4943355466population ecologystudy of size, distribution, and density of populations and how they change over time24
4943243791populationa group of individuals of one species in one area25
4943246610Densitynumber of individuals per volume26
4943249351mark and recaptureOrganisms are captured, tagged, and then released27
4943253587dispersionspacing of individuals28
4943253588ClumpedOrganisms clump together to breed/seek food Easier to be preyed upon29
4943256849UniformOrganisms arrange themselves in near equal distance from each other Sometimes due to territoriality30
4943263098RandomNo attraction/repulsion between the organisms31
4943267894Survivorship curvescurves that show size and composition of a population32
4943269752Type I curveLow death reates in young/middle age and high mortality in adults (humans)33
4943269753Type 2 curveDeath rate is constant34
4943269754Type 3 curveHigh infant mortality but death rate decline as individuals reach certain age35
4943282738Age structure diagramshows relative numbers of individuals at each age36
4943286620zero population growthbirth rates=death rates37
5037529927population growth equation38
4943290157exponential growth modelConstant increase due to availability of resources Ex: bacteria, humans dn/dt=rmaxN39
4943292513logistical growth modelIncrease until carrying capacity reached (K) Ex: most organisms40
4943294751Carrying capacitymaximum number of individuals per population aka K41
5037545576How are per capita rates calculated?Birth/original= per capita birth rate Death/original= per capita death rate per capita birth rate-per capita death rate= per capita rate42
4943305128density dependent factorsincrease directly as population density increases Ex: competition, waste, predation, disease43
4943306610density independent factorsunrelated to population density ex: natural disasters44
4943331334life historychanges that occur in an organisms' lifetime45
4943343380k-selected populationsLow reproductive rates, whose offspring need nurturing Ex: humans46
4943343381r-selected populationsaka oppurtunistic Grow fast, reproduce quickly, die quickly47
5210420435The demographic transitiontransition from high birth and death rates to lower birth and death rates as a country or region develops from a pre-industrial to an industrialized economic system.48
5210428911Pre-industrial stageHighly fluctuating birth/death rates49
5210430653Transitional stagehigh birth rate, decreasing death rate, rising population50
5210437033Late expanding stagebirth rate starts to fall death rate continues to fall51
5210449812Low fluctuating stagebirth and death rate both low steady population fully developed middle class politically and economically stable zero growth!52
5210453261Theoretical declining population stagedeath rate > birth rate53
5118054833Sulfur Cycle54
5118054834Carbon Cycle55
5118054835Nitrogen Cycle56
5157794624nitrogen fixationBacteria converts nitrogen gas into forms usable by plants (nitrates in soil)57
5157797471nitrificationammonium is oxidized to nitrite and nitrate58
5157800340denitrificationbacteria denitrifies nitrates/nitrates to release nitrogen to the atmosphere59
5118054926Phosphorous Cycle60
5210487493biodiversitythe diversity of life in a community61
5210487494What are some threats to biodiversity?habitat fragmentation introduced species overexploitation of resources62
5210493819What are the three levels of biodiversity?genetic species ecosystem63
5210633338invasive speciesa species not native to ecosystem64
5210495437trophic levelswhom eats whom in an environment65
5210608824producersynthesizes sugars and other organic molecules; autotroph66
5210617269consumersconsumes producers and consumers lower in trophic level67
5210621400primary productivityamount of light energy converted to chemical energy by autotrophs during given time period68
521062435910% rule10% of energy is lost between trophic levels69
5210626291food web70
5210498639biomagnificationthe increase in concentration of a substance in a food chain, not an organism.71
5210545830bioaccumulationthe increase in concentration of a substance(s) in an organism or a part of that organism.72

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