Test 1 Notes

Test 1 Notes - Exam 1 Study Guide Liv Leach Conservation-...

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Exam 1 Study Guide Liv Leach Conservation- to use a resource no faster than it can sustain itself; focuses on ecosystem protection and utilizes resources in a sustainable way; term coined by Aldo Leopold Land ethic- a respect for nature Biosphere- where all life exists; from 10,000 meters into the atmosphere to 10,000 meters below the oceans surface Primary production- life depends on autotrophic organisms, the most important of which are plants In ecosystems: net primary production=production-respiration; net pp=kcal/m2year; world pp=billion kcal/year Terrestrial Primary production: rainfall-how much and when; temperature-latitude and elevation; nutrients- nitrogen and phosphorus Examples: Arctic tundra is not very production even though it has nice vegetation, it is only for a very short period of time Grassland is very productive but there is a lack of plant variety Desert is not productive due to lack of rain Boreal forest is not very productive Rainforest is very productive because there is consistent rainfall and a variety of plants Aquatic Primary Production: temperature; nutrients; light- absorption (the ocean absorbs light so it does not penetrate well); turbidity- amount of suspended particles in water (high turbidity kills plant growth) Examples: Headwater stream- not productive Estuary-extremely productive Open Ocean- fairly productive Riparian zone- area next to a waterway Plants are autotrophic- self-feeding, but some are also heterotrophs- feeding on other sources; All animals are heterotrophs and secondary producers Life depends on autotrophs, which use photosynthesis Impacts on natural resources Natural: storms, cold, drought, volcanoes, etc Anthropogenic (human): agriculture, pollution, urban development, industry, overexploitation Resources generally decline when together Key concepts: Renewable natural resources- our actions determine their future considering the impacts on the ecosystem as development expands
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Land use planning Sustainability- we need to learn how to become a more sustainable country to save the “future” earth Stewardship- taking care of our resources and our planet David Brower- “We don’t inherit the Earth from our ancestors; we borrow it from our children.” Natural Resources: Perpetual- unlimited on human time scale; EX. Wind power, solar power, and water (not quantity, but quality) Non-renewable- efficiency is important when considering these resources; EX. Oil, coal, minerals Renewable- must be used sustainably; EX. Soil, forests, rangeland, wetlands, wildlife, fisheries Strategies to protect natural resources include:
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This test prep was uploaded on 04/07/2008 for the course RNR 1001 taught by Professor W.kelso during the Spring '08 term at LSU.

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Test 1 Notes - Exam 1 Study Guide Liv Leach Conservation-...

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