RNR test 1 notes

RNR test 1 notes - RNR 1001 January 19th 2007 Aldo Leopold...

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RNR 1001 January 19 th , 2007 Aldo Leopold coined the term conservation which means sustainability (to use a resource no faster than it can sustain itself) The “land ethic” a respect for nature; way of looking at nature and to appreciate it through processes of evolution, adaptation, and complexity of natural systems White witch Moth (Thysania Agrippina) South American moth with a wing span of up to 12 in/ 1 foot. Conservation focuses on ecosystem protection and utilizes resources in a sustainable way and poses one question: Can we live in a natural world? I. The Biosphere a. Where all life exists. From 10K meters into the atmosphere to 10K meters below the ocean’s surface b. Increasing focus on conserving habitats that support living resources II. Life in the Biosphere a. Primary Production i. Life depends on autotrophic organisms, the most important of which are plants. ii. Photosynthesis: CO2 + H2O CH2O + O2 b. Primary Production in Ecosystems i. Net Primary Production= Production- Respiration; Net PP= kcal/m2 year, World PP (billion kcal/ year) c. Terrestrial Primary Production i. Rainfall- how much rain and when you get it ii. Temperature- latitude and elevation iii. iv. Examples: 1. Arctic tundra- not very productive (has nice vegetation but only for a VERY SHORT period) 2. Grassland- very productive, but not many different types of plants 3. Desert- missing rain, therefore not productive 4. Boreal forest- not very productive 5. Rainforest- very productive, different types of plants and consistent rainfall d. Aquatic Primary Production i. Also depends on temperature and nutrients, as well as light (absorption) and turbidity (amount of suspended particles in water; high turbidity kills plant growth). ii. The ocean absorbs light, therefore not allowing it to penetrate well. Anthropogenic- human made/ caused Riparian zone- area next to waterway
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Plants are autotrophs (self-feeding) while all animals are heterotrophs (feed on other sources). Heterotrophs are secondary producers. Some plants are also hetertrophs (exceptions) January 22 nd , 2007 Impacts on Natural Resources o Natural impacts- drought, cold, storms, volcanoes o Anthropogenic impacts- agriculture, pollution, urban development, industry, overexploitation o Resources generally decline when we see these 2 together Key Concepts of this Course o Renewable Natural Resources- our actions determine their future considering the impacts on the ecosystem as development expands o Sustainability- we need to learn how to become a more sustainable country to save the “future” earth o Stewardship- taking care of our resources and our planet “We don’t inherit the Earth from our ancestors; we borrow it from our children” -David Brower Natural Resources- Can be grouped into 3 categories o Perpetual resources- unlimited on human time scale; ex. Wind power, solar power, and water (not quantity, but quality) o Non-renewable resources- efficiency is important when considering these
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RNR test 1 notes - RNR 1001 January 19th 2007 Aldo Leopold...

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