Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
COMMUNITY AND EDAPHIC ANALYSIS OF MIXED OAK FORESTS IN RIDGE AND VALLEY PROVINCE OF CENTRAL PENNSYLVANIA
 

Summary: COMMUNITY AND EDAPHIC ANALYSIS OF MIXED OAK FORESTS IN
RIDGE AND VALLEY PROVINCE OF CENTRAL PENNSYLVANIA
Gregory J. Nowacki and Marc D. Abrams 1
Abstract: Forty-two relatively undisturbed mixed oak stands on nine different physiographic
units in the Ridge and Valley Province of central Pennsylvania were surveyed to investigate
the ecological status of oak species in the region. Quercus species were primarily restricted
to the canopy, with the exception of Quercus ilicifolia Wangenh. (a shrub). The most species
rich forest stands were located along an indented stream and on fine-textured, valley floor
sites where Quercus alba L., Quercus velutina Lain. and/or Quercus rubra L. dominated the
overstories and Acer rubrum L. and Prunus serotina Ehrh. dominated the understories. _e
importance of Quercus prinus L. was positively correlated with percent sand and elevation,
and this species dominated steep inclines and xeric ridgetop communities. Quercus velutina,
Carya spp. and Q. rubra occurred on all topographic sites, however the latter was most
abundant on cool, north-facing slopes.
Most present-day stands were initiated following heavy cutting and rue around the 1900's,
and the oak component tended to be even-aged. Regeneration data suggest that succession to
more shade tolerant species, primarily A. rubrum, is occurring in all but the most xeric oak
stands. Frequent understory associates with A. rubnon included P. serotina, Acer saccharum
Marsh. and Fraxinus americana L. on mesic toe slopes, indented stream bank and valley floor
sites and Betula lenta L. and Acer pensylvanicum L. on and near ridgetops. Although

  

Source: Abrams, Marc David - School of Forest Resources, Pennsylvania State University

 

Collections: Environmental Sciences and Ecology