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Influence of canopy drip on the indicative N, S and δ(15)N content in moss Hypnum cupressiforme
Mitja Skudnik1, Zvonka Jeran2, Franc Batič3
1Slovenian Forestry Institute, Department of Forest and Landscape Planning and Monitoring, Večna pot 2, 1000 Ljubljana, Slovenia.
Abstract:
Samples of Hypnum cupressiforme were collected at two types of site in forest areas: within the forest stand and within forest openings, and analyzed for N and S concentrations and δ(15)N. Mosses sampled within forest openings reflect the atmospheric N deposition; however, no influence of throughfall N deposition on the N in the moss that was sampled within the forest stand was found, nor was any influence of S deposition on the S in the moss found. For the N and S concentrations in the mosses sampled within forest openings, the within-site variability was comparable to the between-site variability, and for the δ(15)N, the within-site variability was lower than the between-site. The results showed that a short distance (<1 m) between the sampling location and the nearest tree canopy increases the N in the moss, and significantly higher values are found in mosses sampled in areas within the forest stand.
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