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AU - ECO 3060 - Class Notes - Week 3

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AU - ECO 3060 - Class Notes - Week 3

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background image BIOL 3060  8/30/16    Macro/Microclimate  Variation:  o  Spatial:  variation  across some  space    Local    Vegetation  canopy  o  Abovehigh  light,  higher  temp,  lower  humidity  o  Belowless  light,  lower  temp,  higher  humidity    Soil-variable  o  Morning:  soil  temp  < air,  acts as heat sink  (absorbs heat)  o  Late afternoon:  soil  temp  > air,  varies  as heat  source (radiates  heat)  Overnight:  soil  temp  ≤ air,  varies  as heat sources/heat  sink  o  Ex:  lizards-active  in  early  morning,  expose  selves  to sun  to  warm  up, burrow  overnight  to protect from  predators,  can leave  sun  to go to heated  soil  to monitor/regulate  temps  o  Geographic:  aspect (topographic  angle)    Southern-facing  slopes  (side  towards  equator)  (Northern  hemisphere)-species  that  are light  tolerant  (could  be most  shade intolerant  species)    Northern-facing  slopes  have  more  shade  tolerant  species  (mosses,  etc.)  o  Key variables  in  macro/microclimate:    Latitude:  measured  distance  from  equator    Lower  temp/humidity  farther  away from  equator    Elevation/altitude:  distance  above sea level  o  Closer  to sea level=more  humid/warmer    Aspectsouth  facing  more  humid/warmer    Distance  from  coastline:  closer  to coast=wetter,  farther  inland=drier  o  Temporal  (time)  Variation  Type  Mechanism  Outcome  Activity  Level  Daily  Earth’s 
Rotation 
Diel  periodicity 
(24hr  cycle) 
Diurnalday  active 
Nocturnalnight  active 
Crepusculardawn/dusk 
background image Lunar  Sun  & Moon 
activity  on 
Earth 
Tide  (~29 days)  Movement/reproduction 
(intertidal  species) 
Grunion/palolo  worms 
Annual  Earth’s  Orbit  Seasons/seasonality  Migration 
Growth 
Exposure 
Reproduction 
o  Biomes  (cont.)    Tropical  Forest    low  latitudes    hot year  round,  wet or dry climate    central/south  America,  Africa,  southern  Asia    Tropical  Wet (rain)  Forest    Deciduous  vegetation    High  diversity  (angiosperms)    Moderately  long  growing  season    High  above-ground  biomass    High  animal  diversity  o  Amazon  River:  >3000 species  (vs. North America:  800)    Tropical  Dry  Forest    Warm  year-round    More seasonal  (dry  season)    Mostly  deciduous  species    Tolerant  of  low  precipitation    High  animal  diversity    Prairie  (Temperate  Grassland)    Warm-dry  summer,  cool/cold  winter    Same  latitude  as temperature  forests    Lie  in  rain  shadows,  far  from  coasts    Few trees; scrubby  vegetation,  grasses    Fires  occur  regularly- important  natural  disturbance  o  Can be due to lightning  strikes  on dry grass    Cone flower,  squirrel  tail,  bison 

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School: Auburn University
Department: Ecology
Course: Principles of Ecology
Professor: John Feminella
Term: Fall 2016
Tags: Ecology, biomes, hierarchy, and microclimate
Name: Ecology Class Notes Week 3
Description: These notes cover the lectures from the week of 8/30/16. They include macro/microclimate, temporal variation, biomes, ecological organization, and physical environments.
Uploaded: 09/19/2016
5 Pages 9 Views 7 Unlocks
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