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UMass Amherst NRC 225 - Fish grow on Trees
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NRC 225 1st Edition Lecture 25Outline of Last Lecture I. OverviewII. Historical PerspectiveIII. Key attributesIV. Adaption of treesV. Types of FireVI. TRIAD for forest/fire managementOutline of Current Lecture I. StreamsII. Insects in StreamsIII. Canary and Coal MineIV. Stream InvertebratesV. Ectothermic OrganismsVI. HistoryVII. TRIADCurrent LectureFish Grow On TreesStreamsFirst order streams tiny come togetherSecond order-when first comes togetherThird-when second order comes togetherBrook TroutCamouflagedEat insects from stream-sit behind rock until they see something then eat itWait for adult stages insect-Mayfly Insects in StreamMayfliesGo through 3-5 stages to become adultThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Live for 24-36 hours only to reproduce and dieCanary and the Coal MineAccidents in mines-methane would build up-slight spark and the mine would explodeCommon canary was more sensitive to methane-bring in to coal mine-pass out Similar to bugs in the streamsStream InvertebratesPollution IntolerantStoneflies, Mayflies, CaddisfliesSomewhat Pollution TolerantDragonflies and damselflies, aquatic beetles, crayfish, scudsPollution TolerantAquatic worms, snails, fly larvae, leechesEctothermic OrganismsBody temp=environment temperatureRespiration rate is related to temperatureChemical reaction rates are related to temperatureOxygen Demand increases as temperature increasesOxygen supply decreases as temperature decreasesTrees are fundamentally important source of carbon, provider of shade, and maintainerHistoryWhen all the trees were cut down in 1600’s-1900’s lots of streams were run down1990-No shade, high temperatures, less dissolved oxygen, no bank stability, lots of erosions, little nutrients, lots more pesticides1994-restoration planting begins-shade increases, water temperature decreases, more dissolved oxygen, stream bank stability, erosion/sediment loading, more nutrients, looks healthySix years later-everything gets more favorableChain reactions-25 year’s later trees are 60-70 feet tall-lots of shadeTRIAD for watershed protection1. Reserve areasStreams, riversPonds, lakes, reservoirsWetlands and vernal poolsRiparian areas (variable width)No equipment access2. Extensively Managed AreasMultiple use emphasisSilviculture for waterMainly uneven-aged methodsLimited road networkNatural disturbance and active management shapes forest3. Intensively Managed AreasAgroforestryHigh productivity for wood fiberMainly even aged methodsIntensive silvicultureWater yield augmentationLittle or no possibility of soil


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