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Biomes, Landscapes, Restoration, Management
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Terrestrial Biomes nBnBiomes definition - geographic locations on earth that demonstrate similar climate, topography, soil conditions, and communities
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TYPES OF TERRESTRIAL BIOMES Deserts Grasslands (Prairies & Savannas) Tundra Conifer Forests Deciduous & Evergreen Forests Tropical Moist Forests Tropical Seasonal Forests
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Climograph of some major Ecosystems
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n Deserts 1. precipitation - very little (2-10 cm/yr) 2. temperature - varies greatly (-10 to 40 C) 3. life forms - uniquely suited to harsh environment (conserve water!)
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nGnGrasslands: Prairies and Savannas 1. precipitation - moderate (20-120 cm/yr) 2. temperature - varies moderately (-7 to 22 C) 3. life forms - nanabundant grasses and flowering plants (few trees) nvnvery suited to agriculture nwnwolves, deer, elk, bison, antelope (native) *RICH AGRICULTURAL SOIL
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nTnTundra 1. features - high mountains and northern & southern latitudes (frozen but not all ice) 2. precipitation - moderate (10-100 cm/yr) 3. temperature - hardly varies (-20 to -4 C) 4. arctic tundra - lower altitude, rough soil 5. alpine tundra - higher altitude, less oxygen
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n Conifer Forests 1. features -”cone bearing” trees; thin needles as leaves to preserve water 2. precipitation - moderate (10-180 cm/yr) 3. temperature - varies moderately (-12 to 20 C) n boreal forest - mixed coniferous and deciduous trees (hemlock, spruce, cedar, firs) n taiga - on border of tundra, starts to become sparse with trees n temperate rain forest - Olympia Park in Washington
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Broad-Leaved Deciduous & Evergreen Forests 1. features - “deciduous” trees (drop leaves) 2. precipitation - moderate (50 -200 cm/yr) 3. temperature - varies moderately (-12 to 20 C) ntntypical trees - oak, maple, birch, beech, elm, ash *RICH AGRICULTURE SOIL
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n Tropical Moist Forests 1. features - constant temperature and rain 2. precipitation - heavy (>200 cm/yr) 3. temperature - constant (22 - 30 C) n cloud forests - high on mountains in tropics n tropical rain forests - lower in altitude; richest diversity of life forms on earth *MOST PRODUCTIVE AND DIVERSE *POOR AGRICULTURE SOIL
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nTnTropical Seasonal Forests 1. features - rainy (monsoon) and dry seasons 2. precipitation - heavy (150- 220 cm/yr) 3. temperature - constant (22 - 30 C) nvnvegetation - evergreen and deciduous, giving way the woodlands and savannas
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70% OF THE EARTH’S SURFACE WATER IS ESSENTIAL TO LIFE It dissolves nutrients It distributes and removes substances in & out of cells It regulates body temperature It supports structures Aquatic Ecosystems
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nFnFreshwater and Saline Ecosystems 1. freshwater ecosystems - rivers, ponds, lakes nvnvertical stratification (light, temp, oxygen) nbnbenthos - community on bottom ntnthermocline - temp gradient going deeper n“n“salty” lakes - land-locked slat water areas
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n Estuary & Wetlands: Fresh to Sea 1. estuary - site where river meets ocean n rich in nutrients n great gradient of salt content n delta - broad “fan-like” deposit of soil n wetland - land surface saturated most of year – swamps - wetlands with trees – marshes - wetlands without trees
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nSnShoreline and Barrier Islands 1. shoreline - where ocean meets land nvnvaried and rich forms of life nsnsubject to severe erosion during stormy seasons 2. barrier islands- form off the coastline npnprotect shoreline (Atlantic and Gulf coasts) 3. coral reefs - skeletons of “corals” over time nanactual “living islands” for communities to live
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LAKES
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STREAMS RIVERS ESTUARIES
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Human Disturbances nHnHuman Disturbances –o–overuse of terrestrial biomes nanagriculture, slash and burn nonovercutting of forests for wood products nenerosion increase ndndomination by cities and building nNnNAME YOUR OWN EXAMPLES !!!!!!!!!!!!
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Landscape Ecology nLnLandscape Ecology 1. defintion- spatial relationships of ecological phenomenon
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Restoration Ecology n Restoration Ecology - repair and reconstruction of damaged ecosystems 1. restoration - bring back to former condition 2. rehabilitation - not fully restoring 3. remediation - simply “cleaning up” pollutants 3. reclamation - turning from one use to another
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Ecosystem Management nRnRoles Played by Different Groups –g–government (local, state, federal) –a–activist groups (Green Peace, Sierra Club …) –c–citizens –c–corporations
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