10.07.2015 Views

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

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

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

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

# Birds & Bird SpeciesInsect Biomass (g/ac)Insect Density (Thous<strong>and</strong>s)25201510# Birds# Species500 5 10 15 20 25STAND AGEAverage Number <strong>of</strong> Birds <strong>and</strong> BirdSpecies in Various Aged LoblollyPine Plantations — The number <strong>of</strong>birds <strong>and</strong> the diversity <strong>of</strong> bird speciesin loblolly pine plantations isgreatest in young st<strong>and</strong>s <strong>and</strong> declinesas canopy closure occurs.This is directly tied to a decline inunderstory vegetation density. Athinning (age 15-20) would markedlyincrease the number <strong>of</strong> birdsusing the st<strong>and</strong>.806060504040302020Biomass10Density000 5 10 15 20 25STAND AGE▲For five to seven years young pine plantations<strong>of</strong>fer quail nesting <strong>and</strong> brood rearing cover. Quail chicksneed overhead cover but vegetation must be open atground level so they can stalk <strong>and</strong> catch insects easily.(Photo Melissa McGaw, N.C. <strong>Wildlife</strong> Resources Commission)Biomass <strong>and</strong> Density <strong>of</strong> Insects inVarious Aged Loblolly Pine Plantations— Young birds need an abundantsupply <strong>of</strong> insects to thrive <strong>and</strong>survive. Insect abundance in loblollypine plantations increases initiallybut begins to decline as canopyclosure occurs. This is directly relatedto the decline <strong>of</strong> lush herbaceousgrowth in the st<strong>and</strong>.Five

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!