PDF-VALUE AND IMPORTANCE OF HEMLOCK ECOSYSTEMS

Department of Conservation and Natural Resources ABSTRACT Little information in the literaturequantifiesthe value of a hemlock Tsugacanadensisecosystem There was a time when hemlocks were large pl. It was first observed in Queens New York in 1908 Now Found in 13 states including New Hampshire Elongate Hemlock Scale Elongate Hemlock Scale Fiorinia Fiorinia externa externa Jen Weimer NH Division of Forests Lands brPage 4br EHS Infestation in Tennessee Division of Forestry. Background History of HWA. Hemlock woolly adelgid (HWA) (. Adelges tsugae) . is a non-native insect pest that kills native eastern and carolina hemlocks. . (. Tsuga canadensis . woolly adelgid resistance. E. Preisser, B. Maynard, R. . Casagrande. No reported resistance in . Tsuga canadensis. or . T. . caroliniana. Western . hemlock. W. hemlocks resist eastern HWA. and E. hemlocks resist western HWA. at the Spectral Curves of Hemlocks Infested With Hemlock Woolly . Adelgid. Cole . Williams, Forestry Major, Department of Natural Resources. cju97@wildcats.unh.edu. Methods. Sampling. – I sampled by filling a one gallon Ziploc bag with foliage. I moistened some tissue to seal in with each bag to keep the samples from drying out. . Threatened by Hemlock Woolly AdelgidDavid A. Orwig, Harvard Forest &David Kittredge, UMass Extension he introduced HEMLOCK WOOLLY ADELGID (HWA; Adelges tsugae Annand) continues to migrate nor cast. Junhui. Zhao, Douglas A. Maguire, Douglas B. Mainwaring, Alan . Kanaskie. Background. Young Douglas-fir plantations (≤40 yr) are tremendously important to the economic and environmental health of Oregon and Washington due to their extent and productivity (Campbell et al. 2004, Gray et al. 2005). . Background History of HWA. Hemlock woolly . adelgid. (HWA) . (. Adelges. . tsugae. ) . is a non-native insect pest that kills native eastern hemlock . (. Tsuga. . canadensis. ). . HWA was first discovered in Virginia in 1951 and as of 2012 has spread to 18 eastern states where it has significantly altered or reduced native hemlock populations . combining predictive modeling with monitoring. . Tara M. Barrett. 1 . ,Greg Latta. 2. , Paul E. Hennon. 3. , Bianca N.I. Eskelson. 2. , . Hailemariam. Temesgen. 2. 1. Unaffiliated. 2. Oregon State University. cast. Junhui. Zhao, Douglas A. Maguire, Douglas B. Mainwaring, Alan . Kanaskie. Background. Young Douglas-fir plantations (≤40 yr) are tremendously important to the economic and environmental health of Oregon and Washington due to their extent and productivity (Campbell et al. 2004, Gray et al. 2005). . Explain how biomes are characterized. Describe how net primary production varies among biomes. Explain how organisms are adapted to the conditions of their biomes. Describe the criteria ecologist use to classify aquatic systems. Modeling the impacts of hemlock woolly adelgid infestation and presalvage harvesting on carbon stocks in northern hemlock . forests. Jeffrey Krebs, Jen Pontius and Paul . Schaberg. Mapping relative risk of HWA impacts on hemlock growth across the northeast. Aquatic ecosystems are primarily determined by the ecosystem’s . salinity. . Salinity refers to the dissolved salt content of the water.. Aquatic ecosystems are divided into freshwater and marine ecosystems.. F Bell Francis R Herman N GRAHAM a former graduate student College of Forestry Oregon State University Corvallis Oregon is currently with the Medford Corporation Medford Oregon JOHN F BELL is professo astern emlockTsuga canadensisLLtered stands in nearly every partof the stateBest growth is attained onmoistcool sitesIt generally attains aeetand a diameter of23 feetThe terminal shoot droopsand bends