ENVS195 Study Guide - Final Guide: Ocean Current, Grand Banks Of Newfoundland, 600 Miles
31 May 2016
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Document Summary
The oceans and their well-being are integral to sustaining life on this planet. They are key components in global cycles and energy flows. One of the major difficulties working against sustainable human use of the oceans is our lack of understanding of oceanic ecosystems. Five key areas outlined by the textbook. Fisheries, pollution, energy, coastal development, climate change. Most important fishing grounds are found on and along continental shelves . Shifting baselines scientists take the current degraded state as the baseline rather than the historical ecological abundance. Bycatch non-target organisms (seabirds, marine mammals, sea turtles, non-target fish) Bottom trawling one of the most destructive fishing means. Rapid growth of the jellyfish populations, result of warming ocean temps. Chemical pollutants take two forms: toxic materials, nutrients. Endocrine disruptors chemicals in everyday use that mimic processes of endocrine gland (sex, metabolism, growth) & may simulate/replace/repress the natural process. Hypoxia low oxygen (less than 2-3mg/l)
