BIOL 3130 Lecture Notes - Lecture 6: Ecosystem Services, Carbon Credit, Natural Resource
23 Mar 2016
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Document Summary
In the last 90 years, mean temp has increased by 0. 6 c: primarily explained by increases in greenhouse gasses" (co2, methane, nitrous oxide) Model projecions: increased mean and variability of climate. Rate of change, type of change (precipitaion vs temp. Climate is naturally variable by season, by laitude, and by year: atribuion. Covariance with other co-occurring human-based impacts on the environment. The history of climate change: aware that climate change and humans had an impact on the megafauna (mammoths) in the holocene, crested wheat-grass. One of the most successful introducions in the history of introducions. Produces 3-5 x more aboveground biomass than naive grasses. Phenology of crested wheat-grass exactly matches the new climate: no average yearly change in climate, however monthly trends perfectly matched the life history of the crested wheat-grass. Rapid evoluion hypothesis: strong an immediate climaic-based selecion on populaion traits evoluionary change. Plasicity hypothesis: strong and immediate climaic-based adjustments in growth, phenology, and reproducion ecological change.
