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Ecology
Ecology
62
Biology
Graduate
07/16/2010

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Term
Ecology
Definition
the interaction between ecology is the study interaction organism and their enviroment
Term
Enviroment
Definition
anything external to the organism
Term
difference between biotic and abiotic enviroment
Definition
abiotic is non living biotic living
Term
population
Definition
a group of organisms (same species) living together
Term
species
Definition
a group of similar organisms that can reproduce a fertile offspring
Term
community
Definition
consists of populations of different plants and animal species interacting with each other in a given enviroment
Term
biotic community
Definition
populations excluding
Term
ecosystem
Definition
includes the community and the enviroment (either living or nonliving)
Term
biosphere
Definition
included all portions of the planet that support life (atmosphere, lithosphere[rock,soil surface], hydrosphere[oceans])
Term
what are the components of enviroment
Definition
water, temperature (protoplasm destroyed below 0C or high temp), sunlight, oxygen supply, substratum (soil or rock)
Term
what are the different sunlight zones for water organisms
Definition
photic-top layter through which light can penetrate, aphotic-lower layer where only animal or other heterotrophic organisms can reside
Term
what are the factors of substratum
Definition
aka soil or rock…acidity(pH)-acid rain may affect some the growth of plants(who depend on acid soil)….texture-water holding capacity affects roots for plants…..minerals-affect the type of vegetation(sand is leached from minerals making hard to grow)
Term
loams
Definition
a high percentage of different kinds of soil…this is very popular for plants to grow on
Term
Humus quantity
Definition
determined by the amount of decayed plant and/or animal
Term
niche
Definition
defines the functional role of an organism in a ecosystem, not the same as a habitat, two organisms can never occupy the same niche
Term
what are the outcomes of niche competion
Definition
organisms drive the other to be extinct in different areas…diverge into greatly different organisms
Term
autotrophs vs heterotrophs
Definition
autotrophs=manufacture their own food (ex. by sunlight)…..heterotrophs=depend on other organisms
Term
difference between herbivores and carnivores
Definition
herbivores-long digestive tracts for more time to digest, DEPENDS on symbiotic bacteria for digestion…..carniovres-pointy/fanglike teeth and shroter digestion tract because they are good at digestion
Term
commensalism
Definition
symbiosis when one benefits and the other isn't affected (remora sucks food shark discarded……barncle attaches to whale to gain more migration to move)
Term
mutualism
Definition
symbiosis when both benefits (birds eat ticks off of rhinos, lichen[algae-energy, fungi-co2,N,house], legumes-N bacteria nutritrents to each other, E Coli)
Term
Parasitism
Definition
benefit at expense of hosts, ecto vs endoparisite….include all viruses, some bacteria, most fungi, some worms[better parasites keep their host alive
Term
where does the predator-prey relationship usually end up by time
Definition
predator affects the prey population but not enough to bring it to extinction
Term
Saprophytism
Definition
when protists or fungi that decompose(digest) dead organic material, they contribute a lot for cycling of material in the ecosystem….can be consisdered scavngers when they decompose dead animals
Term
scanvengers
Definition
when animals consume dead animals, require no adaptations
Term
how do organisms cooperate
Definition
cohesive forces include reproduction,protection from predators and bad weather
Term
which fish live in hyper vs hypoosmotic enviroment
Definition
hyper-salt water-require ACTIVE excretion to avoid….hypo-fresh water-seldom drink,absorb salts through gills, and excrete dilute urine
Term
how do desert animals osmoregulate
Definition
camels have fat to prevent sun damage, horned toad have scales to prevent water loss, others burrow in the sand during day and search for food at night
Term
how do plants osmoregulate
Definition
nondesert osmoregulate by having waxy cuticles on leaf surfaces and stomata on the lower leaf only,shed leaves at winter to prevent water loss, desert-extensive roots,fleshy stems for storing, spiny leaves,thick cuticles,and few stomata to prevent water loss
Term
stomata
Definition
a pore, found in the leaf and stem epidermis that is used for gas exchange and water loss
Term
what is most of the energy released in a organism?
Definition
60% is given off as heat, cellular respiration is used for fraction of energy
Term
poikilothermic
Definition
cold blooded animals/plants….most are cold blooded…the body temperature is very close to the enviroments temperature
Term
homeothermic
Definition
warmblooded animals (mammals,birds), physical adaptations like fat,hair,and feathers help…able to go to wide variety of enviroments
Term
original source of energy
Definition
producers-autotrophic green plants and chemosynthetic bacteria which utilize energy from sun(stored in a CH bond) and simple raw materials
Term
Primary consumers
Definition
animals that consume plants (herbivores)
Term
secondary and tertiary consumers
Definition
2nd-consume primary aka carnivores……..3rd eats 2nd
Term
how does the food web affect the community
Definition
greater the number of pathways, the more stable community
Term
food pyramids
Definition
primary is always on bottom, tertiary is top…..the pyrimade is based off of energy,mass,and numbers because energy gets lost during feeding
Term
nitrogen cycle
Definition
wiki pic (nitrogen cycle)
Term
how does animals obtain CO2 gas
Definition
by eating plants
Term
how is CO2 released into the enviroment…..how is it consumed?
Definition
Co2 is released by ph????????????????????????
Term
what are other gas cycles include
Definition
other gas cycles include water, oxygen, and phosphurus
Term
what is required for a stable ecosystem
Definition
requires a constant energy source, CYCLING of material between living system and its enviroment is very critical
Term
climax community
Definition
the stable, living part of the ecosystem which depends on abiotic factors…and needs to have a unique equilibrium
Term
ecological succession
Definition
when 1 biotic comminity replaces another, and each SERE(community stage) is identified by its dominant species[grass in grassland example]
Term
what do dominant species of the climax depend on?
Definition
depends on physical factors like temperatture, soil, rainfall
Term
biome
Definition
a distinct comminuty that is distinct by plant domination
Term
desert biome
Definition
<10in of rain per yr, small animals and plants, usually insects or reptiles, some mammals live
Term
grassland biome
Definition
10-30in of rain per year, provide no shelter for herbivour mammals from predators, animals usually have long legs and are hoofed
Term
tropical rain forest biome
Definition
aka jungles that have high temperature and continous rains, epiphytes(plants on plants), lots of animals, trees are densily packed, sunlight harly hits the floor, include saprophytes(live off dead organic matter)
Term
temperature deciduous forest biome
Definition
cold winters, warm summers, moderate rainfall, beech,maple,oaks,and willows shed leaves in the winter,,,,include deer,,fox,woodchuck,squrell
Term
temperature coniferous forest biome
Definition
cold,dry, include [fir,pine,spruce trees], water consiervation[needle leaves], found in southern canada
Term
taiga biome
Definition
less rainfall than temperate, long cold winters, only one coniferous tree[spruce], moss and lichens, has moose, blck bear, wolf, birds…found at northern canada/russia
Term
tundra biome
Definition
treeless frozen plain, short rain season, has lichens,moss,polar bears, musk oxen, artic hens
Term
polar region
Definition
no vegeation, animals generally live near the oceans
Term
what do terrestial biomes depend on?
Definition
depend on temperaure and rainfall
Term
what are major contributions from aquatic biomes to earth
Definition
70% of earth's surface is water, 90% of photosyntheisis
Term
what makes aquatic enviroment unique
Definition
plants have little affect, it changes very slowly
Term
marine biomes
Definition
oceans connect to form large continous bodies, water absorbs heat without changing temperature, good amount of nutrient materials and disolved salts
Term
intertidial zones
Definition
marine zone- which is at the shore, relatively unstable (gets dry and temp. change), algae,sponges,clams,snail, sea urchins, starfish,crabs
Term
littoral zones
Definition
marine zone- includes a sudden drop in depth(from shore to photic zone), algae,crubs,crustacea,fishes
Term
pelagic zones
Definition
marine zones-photic:microscopic photosynthesis, heterotrphic organism, nekton, active swimmer(fish,sharks,whales), diotom…..aphotic:cold,high pressure,nekton, benthos(crawling/sessile organisms), scavangers, very competitve
Term
freshwater biomes
Definition
hypotonic enviroment(allows water enter organism and release water(by excretion), plants have cell turgor for strong pressure, have strong muscle or hold fasts for swift currents, affected by variations of climate and weather(excepts lakes)
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