ch1-7 notes Env H 311
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ENV H 111
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This 2 page Bundle was uploaded by Jen Morgan on Sunday October 18, 2015. The Bundle belongs to Env H 311 at University of Washington taught by Charles treser in Summer 2015. Since its upload, it has received 44 views. For similar materials see Introduction to environmental health in Nursing and Health Sciences at University of Washington.
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Date Created: 10/18/15
Environmental Health 311 Notes Chapter 1 Biosphere portion of earth where life occurs from deep ocean trenches to mountains First living organism on earth is thought to have arisen 35 billion years ago Ecosystems are the basic functional groups of nature Biotic community grouping of different kinds of plants and animals within a given habitat Keystone predators help maintain greater biotic diversity they moderate competition among the species they prey Biomes areas recognized by distinctive life forms of dominant species 0 Tundra characterized by permafrost vegetation consists of moss lichens grass animal include caribou birds foxes polar bears reptiles and amphibians o Taiga dominant vegetation are conifer trees animals include bear moose wolves and lots of land birds 186 species 0 Temperate deciduous forest mild climate lots of rain rich soil 0 Grasslands carnivores rodents and reptiles are abundant most expensive ecosystem 0 Desert animals are active at night human affects have caused increase in amount for desert and wasteland 0 Tropical rain forest high temps and high annual rainfall100 inches plant and animal species have the largest diversity thin and nutrient poor soils Principle of competitive exclusion if two species are competitive for the same limited resources only one will survive Law of minimum a plant will grow based on the resource that is presented to it in a minimum Second law of thermodynamics with every energy transformation there is a loss of usable energy 0 Entropyenergy is moving to disordered state therefore is less usable Biogeochemical cyclingmovement of earth materials through living systems and back to earth Chapter 2 Growth rate birth rate death rate 12 million people are killed in road traffic accidents mental health in poor countries estimate that 51 of adults suffer depression high levels of violence in urban areas Chapter 3 birth control helped signi cantly decrease birth rate and rate of complications due to birthing numbers by same mother etc 0 using many different protection methods and national awareness birth rates have generally gone down in developing countnes desire for sons and the willingness for children as social security keep birth rates higher in developing countries than in developed countnes Chapter 5 overgrazing causes decline in plants unable to tolerate it then decline in plants more able to tolerate it which overall leads to decrease in biomass soil erosion one third of agricultural land is losing soil faster than it is being replenished 0 conservation tillage tried to reduce soil erosion by having famers leave 30 or more of the soil surface covered with previous years crop residue deforestation every year 13 million acres of forest are lost 0 cattle ranching and soybean production have led to deforestation Chapter 6 teratogens substances that cause birth defects
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