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Ch18
ecology overview, diverse environments, biomes, global climate change
44
Biology
Undergraduate 2
12/02/2012

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Term
Ecology
Definition
scientific study of interactions between organisms and their environments, offers a different perspective on life
Term
biotic factors
Definition
(all of the organisms in the area) make up the living component of the environment
Term
habitat
Definition
includes abiotic and biotic factors of its surroundings
Term
organismal ecology
Definition
concerned with the evolutionary adaptations that enable organisms to meet the challenges posted by their abiotic environments
Term
population ecology
Definition
concentrates mainly on factors that affect population density and growth
Term
community ecology
Definition
how interactions between species, such as predation and competition, affect community structure and organization
Term
ecosystem
Definition
all abiotic factors in addition to the community of species in a certain area
Term
ecosystem ecology
Definition
energy flow and the cycling of chemicals among the various biotic and abiotic factors
Term
biosphere
Definition
global ecosystem-the sum of all the planet's ecosystems, or all of life and where it lives
Term
Why is solar energy such an important factor for most ecosystems?
Definition
Solar energy captured by the process of photosynthesis provides most of the organic fuel and building material for the organisms in those ecosystems
Term
acclimation
Definition
gradual, though still reversible, physiological adjustment that ours in response to an environmental change
Term
organism
Definition
individual living thing
Term
population
Definition
group of individuals of the same species living in a particular geographic area
Term
community
Definition
all of the organisms that inhabit a particular area; an assemblage of populations of different species
Term
distribution of life
Definition
large scale:african savannah, coral reef, desert. local scale:lake. micro scale: in soil (anaerobic/aerobic)
Term
anaerobic
Definition
lacking or not requiring molecular oxygen
Term
aerobic
Definition
containing or requiring molecular oxygen
Term
abiotic factors of the biosphere
Definition
energy source, temperature, water, inorganic nutrients, terrestrial, aquatic
Term
inorganic nutrients
Definition
plant growth; the distribution and abundance of photosynthetic organisms, including plants, algae, and photosynthetic bacteria, depend on the availability of inorganic nutrients
Term
energy source
Definition
photoautotrophs, chemoautotrophs, heterotrophs
Term
photoautotrophs
Definition
things that use light as energy source; plants and algae/protists, bacteria, archaea
Term
chemoautotrophs
Definition
things that get energy from inorganic compounds; hypothermal vents/caves,extremophiles(imp in genetic engineering)
Term
heterotrophs
Definition
energy by eating; animals, fungi, protist, bacteria, archaea, few plants
Term
dark habitat
Definition
species with no color/small eyes or no eyes/give off light
Term
temperature
Definition
important because of its effect on metabolism; tendency to tolerate warm weather rather than cold(cold temp destroy enzymes of most organisms)
Term
aquatic factors
Definition
must depend on oxygen dissolved in water; cold fast moving water has a higher oxygen content; saltiness
Term
terrestrial factors
Definition
wind increases organism's rate of water loss by evaporation; saltiness
Term
Nitrogen and Phosphorous
Definition
may be pollutants in water, they are nutrients in soil
Term
N
Definition
limiting nutrient in salt water; major source: human sewage; animal manure, fertilizers
Term
P
Definition
limiting nutrient in freshwater; major source: detergents/fertilizers
Term
evolutionary adaptations
Definition
organisms can respond to environment but not evolve, only population can evolve
Term
organismal response
Definition
or lack of, can lead to evolution population
Term
physiological response to environment
Definition
body's response to temp; hot-sweat; cold-contracting skin muscles
Term
anatomical response to environment
Definition
change in body shape or structure; animals fur thicker in winter or changes color
Term
behavioral response to environment
Definition
migrate, hibernate, move in and out of shady areas
Term
biomimicry
Definition
A new science that studies nature's models and then uses these designs and processes to solve human problems; nature engineer
Term
biomimicry factors
Definition
randomn variation, competition, natural selection, evolution; must be effective, efficient, practical, robust, flexible
Term
examples of biomimicry
Definition
velcro,wind turbins, gecko, cars, airplanes, solar pannels
Term
biome
Definition
major terrestrial or aquatic life zone, characterized by vegetation type in terrestrial biomes and the physical environments in aquatic biomes
Term
photic zone
Definition
shallow water near shore and the upper layer of water way from shore
Term
aphotic zone
Definition
where light levels are too low to support photosynthesis (deep lakes)
Term
benthic realm
Definition
bottom of all aquatic biomes, made up of sand and organic and inorganic sediments
Term
phytoplankton
Definition
microscopic algae and cyanobacteria in aquatic biomes
Term
freshwater biomes
Definition
cover less than 1% of earth; fall into 2 broad groups:standing water, which includes lakes and ponds, and flowing water, such as rivers and streams. diff in water movements results in profound differences in ecosystem structure
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