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UMass Amherst NRC 225 - Forest Management
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NRC 225 1st Edition Lecture 21 Outline of Last Lecture I. Patches, stands, landscape mosaicII. Canopy gapsIII. Forest ecology lesson from thinningOutline of Current LectureI. Age DistributionII. Forest ManagementIII. Forest GapIV. Management OptionsV. Wildlife Habitat ManagementVI. Forest and Wildlife Changing TogetherCurrent LectureThe primary agent of forest change since European settlement is humanAge distributionEven aged-single initiation event, singly canopy layer, normal distribution, time trendsCaused by natural event-hurricane or forest fire or farmer goes westUneven aged-Gap opens and fills, multiple canopy layers, usually moreCaused by- couple trees go down or number of trees goes down (microburst)Either even or uneven there is a gap and if we let process take its course it causes uneven looking forest-mosaic looking forestForest Management-managing the trees to achieve goals and outcomeComes from managing the amount of light first then, water, nutrient availabilityManage light by varying gaps and size of treesGoal: make the forest more diverse-makes wildlife more diverseForest GapIn a forest gap the warmest driest part is the center of the gap because it has the most sun coming in-least humidity least soil moistureIn a forest gap the coolest wettest is the southern edge of the densest part of the trees because the sun shines on the south side more but the trees shade itIn a forest gap the decomposition rate is higher on the southern sideThese 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.Dictates the nutrient availabilitySeed dispersal-the seeds that get to the center of the gap aren’t the toughest seedsManagement optionsNo harvesting (looks like lawn-all the same very few gaps)Crown and Low Thinning-C and D trees I and S treesRemove the dying Codominant trees and occasional dominantCutting intermediate and suppressed treesPatch Cut-artificial industrial patternIrregular ShelterWildlife Habitat ManagementThings to look at-are these sources big enough? Are we allowing wildlife to move around in natural waysFoodWaterCoverHiding/escapeThermalSpatial arrangementThe juxtaposition of patchesOpening size (edge/opening)Forest and Wildlife Changing TogetherFoodCover (hiding and thermal)WaterSpatial arrangementChanging forests….species, vertical structure, patch sizeThing to look at with wildlife and forest managemtnOpening or patch size?Edge/Opening Ratio?Interior Forest Area?Shape and adjeacentyRisk of nest


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