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Exam 2
Ecology Terms and Concepts
22
Biology
Undergraduate 2
10/27/2008

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Cards

Term
Plant Adaptions: Cold Temp
Definition
Dark Pigments, hairless, reduced surface area per mass unit, leaf orientation facing the sun
Term
Plant Adaptations: Warm Temp
Definition
Large Surface area per mass unit, wind flows through the plant, orient leaves parallel to the sun so it does not get direct sun exposure.
Term
Mixing of Isotopes
Definition
The concentration of different water isotopes changes with temp.(known as fractionization) Warm water has higher concentration of H2O - 18
Term
Poikilotherms
Definition
body temp changes with environment
Term
Homeotherms
Definition
Typically higher than ambient temperature. Body temp. does not change with environment very much
Term
Behavioral Regulation of Temp.
Definition
Moving to warmer/colder areas to regulate body temperature.
Term
Thermal Neutral Zone
Definition
Temperature range where organisms do not need to use metabolism energy to maintain homeostasis. Cold climate animals have larger zone.
Term
Marine Animal Adaptions
Definition
Drink a lot, Secrete Cl-, H2O diffuses out, concentrated urine.
Term
Freshwater Animal Adaptions
Definition
Cl- absorbed, don't drink a lot, dilute urine, H2O diffuses in.
Term
Detritovores
Definition
eat dead stuff, decomposers
Term
C3 Photosynthesis
Definition
Most common, uses the most water (380g - 900g per gram of tissue produced). Occurs in mezophyll cells, CO2 and Rubisco is used to form acid where Carbon is located.
Term
C4 Photosynthesis
Definition
250g - 350g of water used per gram of tissue created, mezophyll cells, PEP is the fixation enzyme and it is more efficient, Independent of life?
Term
CAM Photosynthesis
Definition
50g of water used/gram of tissue created, temporal separation of CO2 fixation, very good at fixing CO2 at night.
Term
Photosynthesis Flux, CO2 Flux, Nitrogen Flux.
Definition
More light added, less and less return in how much photosynthesis increase there is. This is also true for CO2 and Nitrogen.
Term
Plant Nutrients
Definition
Nitrogen: Chlorophyl + Rubisco
Phosphorous: RNA and DNA
Micro nutrients: K, Ca, Mg, S
Term
Chemoautotrophy
Definition
Nitrophying bacteria take ammonium (NH4) and oxidize it to release Nitrogen which is important for life.
Term
Plants are Yucky
Definition
High C:N ratios, animals seek out young leaves to get lowest C:N ratios, Carbons are in long chains (lignin, cellulose, tannin) so they are hard to digest, alkaloids = poisonous, grasses have silica (hard to chew).
Term
Functional Response
Definition
way to measure consumption ratio in response to density of prey
Term
Type one
Definition
linear relationship
Term
type 2
Definition
food intake increases = less intake of nutrients
Term
type 3
Definition
food intake increases = higher intake of nutrients
Term
Organisms become pickier...
Definition
with higher abundance of prey
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