Early regeneration following the presalvage cutting of hemlock from hemlock-dominated stands

Live overstory hemlock were cut from three hemlock hardwood stands on the watershed of the Barkhamsted Reservoir in northwestern Connecticut. The presalvage cuttings occurred during a hemlock looper outbreak and in anticipation of hemlock woolly adelgid (HWA) infestation. All merchantable and accessible hemlock trees were cut, as were a smaller quantity of other species. The stands were harvested in 1992, 1994, and 1995?96. Over- and understory vegetation were surveyed in the harvested stands and in three nearby uncut, control stands in 1996. Findings suggest that the cut stands will regenerate to hardwoods in the near term. Hemlock regeneration was minimal and insufficient to replace harvested trees. Presalvage cutting of hemlock from hemlock-dominated stands, which typically lack sufficient advance hemlock regeneration, will contribute to the loss of the cover type due to HWA-caused mortality.

[1]  Ralph D. Nyland,et al.  Silviculture: Concepts and Applications , 1996 .

[2]  M. Kelty.  Productivity of New England hemlock/hardwood stands as affected by species composition and canopy structure , 1989 .

[3]  J. Battles,et al.  Potential impacts of hemlock woolly adelgid (Adelges tsugae) on eastern hemlock (Tsuga canadensis) ecosystems. , 1996 .

[4]  Mariko Yamasaki,et al.  New England wildlife: management forested habitats , 1992 .

[5]  David R. Foster,et al.  FOREST RESPONSE TO THE INTRODUCED HEMLOCK WOOLLY ADELGID IN SOUTHERN NEW ENGLAND, USA , 1998 .

[6]  S. Salom,et al.  Past and current status of HWA in eastern and Carolina hemlock stands. , 1996 .

[7]  Craig G. Lorimer,et al.  Single-tree versus group selection in hemlock-hardwood forests: are smaller openings less productive? , 2002 .

[8]  T. Fuller,et al.  Habitat Use by Porcupines (Erethizon dorsatum) in Central Massachusetts: Effects of Topography and Forest Composition , 1998 .

[9]  D. Leopold,et al.  Vascular plant propagule banks of six eastern hemlock stands in the Catskill Mountains of New York. , 2000 .

[10]  R. T. Brooks,et al.  Forest resources of southern New England , 1993 .

[11]  J. Pronos,et al.  Forest insect and disease conditions in the United States 1979 , 1981 .

[12]  John A. Young,et al.  Influence of eastern hemlock (Tsuga canadensis) forests on aquatic invertebrate assemblages in headwater streams , 2002 .

[13]  D. E. Hill,et al.  Soil survey of Litchfield County, Connecticut. , 1970 .

[14]  Matthew J. Kelty.  Silviculture and stand dynamics of hemlock-dominated stands in southern New England: some lessons from early research , 2000 .

[15]  T. W. Bowersox.  The Practice of Silviculture—Applied Forest Ecology, Ninth Edition , 1997, Forest Science.

[16]  M. Yamasaki,et al.  Wildlife habitat associations in eastern hemlock - birds, smaller mammals, and forest carnivores , 2000 .

[17]  R. Degraaf,et al.  New England Wildlife: Habitat, Natural History, and Distribution , 2000 .

[18]  P. Ashton,et al.  Natural regeneration patterns in even-aged mixed stands in southern New England. , 1990 .

[19]  S. Salom,et al.  Value and importance of hemlock ecosystems in the eastern United States. , 1996 .

[20]  Daniel L. Goerlich,et al.  Natural regeneration of eastern hemlock: a review , 2000 .

[21]  W. Mcwilliams,et al.  Composition, structure, and sustainability of hemlock ecosystems in eastern North America , 2000 .