NRC 225 1st Edition Lecture 21 Outline of Last Lecture I Patches stands landscape mosaic II Canopy gaps III Forest ecology lesson from thinning Outline of Current Lecture I Age Distribution II Forest Management III Forest Gap IV Management Options V Wildlife Habitat Management VI Forest and Wildlife Changing Together Current Lecture The primary agent of forest change since European settlement is human Age distribution Even aged single initiation event singly canopy layer normal distribution time trends Caused by natural event hurricane or forest fire or farmer goes west Uneven aged Gap opens and fills multiple canopy layers usually more Caused 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 forest Forest Management managing the trees to achieve goals and outcome Comes from managing the amount of light first then water nutrient availability Manage light by varying gaps and size of trees Goal make the forest more diverse makes wildlife more diverse Forest Gap In 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 moisture In 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 it In a forest gap the decomposition rate is higher on the southern side These 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 availability Seed dispersal the seeds that get to the center of the gap aren t the toughest seeds Management options No harvesting looks like lawn all the same very few gaps Crown and Low Thinning C and D trees I and S trees Remove the dying Codominant trees and occasional dominant Cutting intermediate and suppressed trees Patch Cut artificial industrial pattern Irregular Shelter Wildlife Habitat Management Things to look at are these sources big enough Are we allowing wildlife to move around in natural ways Food Water Cover Hiding escape Thermal Spatial arrangement The juxtaposition of patches Opening size edge opening Forest and Wildlife Changing Together Food Cover hiding and thermal Water Spatial arrangement Changing forests species vertical structure patch size Thing to look at with wildlife and forest managemtn Opening or patch size Edge Opening Ratio Interior Forest Area Shape and adjeacenty Risk of nest depreciation 6
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