Ecosystems Abiotic factors Biotic factors. Haiti – key attributes of ecosystem 75% live on <$2/day soil erosion use wood for charcoal U.S. planted 60m.

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Presentation transcript:

Ecosystems Abiotic factors Biotic factors

Haiti – key attributes of ecosystem 75% live on <$2/day soil erosion use wood for charcoal U.S. planted 60m trees

Population Control Density dependent factors Density independent factors Disturbances – medium level of disturbance is thought to build the most diverse cosystems

Survivorship Curves

r vs K-selected species

Keystone Species Has a disproportionate effect on its environment relative to its population size

Trophic levels Producers/autotrophs Carry out photosynthesis How does respiration differ?

Trophic levels Consumers/heterotrophs - herbivores secondary consumers - carnivores

Trophic levels Scavengers Detritovores

Business and Environment Beyond legislation and litigation must-watch-ted-talks/ Ecosystem values – provision (lumber), regulator (natural filter), support (pollination), resilience (absorb water in a flood), cultural

Climate Change – Keeling Curve eelingcurve/2014/08/26/as-told-by- the-american-museum-of-natural- history/

Biomes (1) tundra taiga/boreal forest temperate deciduous forest temperate rain forest

Biomes (2) chaparral temperate grassland savannah tropical rain forest

Biomes (3) deciduous forest desert wetlands

Coastal / oceanic Ecology bog estuary intertidal zone pelagic (or bathyal or midnight zone) benthos upwelling coral reef mangrove forest

Lake Ecology hypoxia euphotic zone littoral zone limnetic zone profundal zone benthic zone bathyal zone abyssal zone euphotic (light) littoral (near shore) limnetic (PS) profundal (deep) benthic (sediments +)

Biomes - Listed tundra taiga/boreal forest temperate deciduous forest temperate rain forest chaparral temperate grassland tropical grassland tropical rain forest tropical seasonal forest desert wetlands