Air-pollution injury on Pinus strobus in Cuyahoga National Recreation Area - 1985 survey results. Final report
Visible symptoms of ozone injury were observed on 97% of the Eastern white pine trees (Pinus strobus) sampled in 1985 from permanent plots at Cuyahoga National Recreation Area. Average injury was low and affected about 2.6% of the needle surface. None of the trees sampled had more than 10% injury. Chlorotic mottle was the most common ozone symptom encountered, followed by fleck injury and tipburn. Symptoms of other injury types were observed in 10% of the needle surfaces sampled. No significant variation among plots was observed in any of the injury symptoms. Total ozone injuries observed at Cuyahoga did not differ significantly from those observed in similar samples at other National Parks.
- Research Organization:
- Butler Univ., Indianapolis, IN (USA). Holcomb Research Inst.
- OSTI ID:
- 6412681
- Report Number(s):
- PB-87-172060/XAB; HRI-94
- Country of Publication:
- United States
- Language:
- English
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