GE CLST M1A Lecture 1: Cluster M1A Notes and Study Guide
22 Mar 2017
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Document Summary
A type of indirect evidence that serve as substitutes for direct measurement and that shed light on past climate: bubbles of atmospheric gases are trapped within ice formed thousands of years ago. Analyzing the gases within, allows co2 levels to be determined: showed that the basic trend is an increase in atmospheric co2 levels, concluded that there is a clear correlation between temperature and atmospheric co2. Agriculture contributes to 19-29% of global emissions through : deforestation, livestock, fertilizer and pesticide production, tilling, farm equipment, transportation. The consequences of population growth in limited environments: resource availability, competing species, predators and disease, habitat condition. Top down: predation (food resources, competition for space) Bottom up: availability of resources (nutrients, food, space) 1: habitat destruction, eutrophication, deserti cation, air pollution, water pollution, gyres, overharvesting, extinction, diseases, disasters, malnutrition, global climate change. K/2: half the carrying capacity, where population number reaches the highest point (msy) then decreases.
