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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 on theme: "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."— Presentation transcript:

1 Ecosystems Abiotic factors Biotic factors

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

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

4 Survivorship Curves

5 r vs K-selected species

6 Keystone Species Has a disproportionate effect on its environment relative to its population size https://www.youtube.com/watch?v=_IWw8Ruz8Uo

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

8 Trophic levels Consumers/heterotrophs - herbivores secondary consumers - carnivores

9 Trophic levels Scavengers Detritovores

10

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12 Business and Environment Beyond legislation and litigation..... http://greatecology.com/great-ecologys-top-5- must-watch-ted-talks/ Ecosystem values – provision (lumber), regulator (natural filter), support (pollination), resilience (absorb water in a flood), cultural

13 Climate Change – Keeling Curve https://scripps.ucsd.edu/programs/k eelingcurve/2014/08/26/as-told-by- the-american-museum-of-natural- history/

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

15 Biomes (2) chaparral temperate grassland savannah tropical rain forest

16 Biomes (3) deciduous forest desert wetlands

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

18 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 +)

19 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


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