Bryan A. Black and Marc D. Abrams (203 Forest Resources Laboratory, University Park, PA 16802). Disturbance history and climate response in an old growth hemlock forest, central Pennsylvania. J. Torrey Bot. Soc. 132: 103–114. 2005.—Radial growth patterns are examined in relation to the historical development, disturbance history, and climate responses of an old-growth hemlock forest located in central Pennsylvania. Hemlock recruited continuously from the mid 1700s through 1890 with a sharp pulse of regeneration between 1860 and 1870, while white pine formed an even-aged cohort in a narrow interval between 1865 and 1870. No recruitment of any species occurred in the 20th century, likely because of deer browsing. Isolated pulses in radial growth occurred in almost every decade of the chronology, indicating a high frequency of small-scale disturbances. Major stand-wide pulses in hemlock radial growth occurred around 1810 and 1850. The 1850 event corresponds with the date of two intense windstorms and was the only disturbance event large enough to recruit white pine. Long-term effects of climate were apparent in the 20th century in which periods of low radial growth occurred in the cool, dry periods of 1910–1930 and 1965–1970. Correlations and response function analysis revealed that hemlock radial growth was limited by drought in winter and early fall, and by low March temperatures.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 132 • No. 1