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Managing Pines for Profit and Wildlife - Virginia Department of ...

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% COVERAGE100806040OverstoryGround200 0 5 10 15 20 25STAND AGE% Vegetative Coverage <strong>of</strong> Overstory<strong>and</strong> Ground Layers in Various AgedLoblolly Pine Plantations — As loblollypines grow older, their crowns(canopy) begin to intercept an increasingamount <strong>of</strong> sunlight. Eventually verylittle sunlight reaches the <strong>for</strong>est floor.Ground-level <strong>and</strong> understory plantsdecline with the decreasing sunlight.A pulpwood pine thinning at year 15to 20 will restore a better balance <strong>of</strong>understory plants, greatly benefittingnumerous wildlife species.300250DRY WEIGHT (grams)20015010050ForbsGrasses▲In the first five to seven years <strong>of</strong> a new plantation,the young pines <strong>and</strong> herbaceous growth <strong>of</strong>fer habitat <strong>for</strong>a host <strong>of</strong> early-successional wildlife species like pinewarblers, field sparrows, <strong>and</strong> bobwhites.(Photo Dwight Dyke)00 5 10 15 20STAND AGENon-Woody Biomass <strong>of</strong> UnderstoryPlants in Various Aged LoblollyPine Plantations — The herbaceousplants <strong>of</strong> a pine st<strong>and</strong> are valuable towildlife as food <strong>and</strong> cover. They alsoplay an important role in maintainingwater quality by reducing erosion <strong>and</strong>holding nutrients on the site. Grassesare most abundant early <strong>and</strong> decline asthe amount <strong>of</strong> sunlight reaching groundlevel declines. Forbs (broadleaf, nonwoodyplants) increase <strong>for</strong> 5-7 years, butalso decline as sunlight diminishes.Three

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