Integrated impact of sulphur and nitrogen deposition and ozone on forest ecosystems in Lithuania, 1995–2015

Estonian Academy of Sciences. Proceedings

Steigvilė Byčenkienė¹ 

关键词: sulphur deposition;    nitrogen deposition;    ozone;    crown defoliation;    critical load;   

DOI  :  10.3176/proc.2018.4.03

学科分类：化学（综合）

来源: Teaduste Akadeemia Kirjastus

【 摘 要 】

The present study considers temporal variability in concentrations of the throughfall fluxes and bulk fluxes of sulphate,nitrate, and ammonium in precipitation in Lithuania evaluated employing a non-parametric Mann-Kendall test along with Sen’sslope estimator during the period 1995–2015. Decreased air concentrations of sulphur species and ammonium as well as theirdeposition were the main drivers of the reduction of mean defoliation of Scots pine trees in Lithuania. Their effect on Norwayspruce crown defoliation was less expressed, but no effect of acidifying species and surface ozone was detected on birch treecrown defoliation. The established relationships revealed that a deterioration of the health of coniferous tree species, first of allScots pine, could be expected only in forest where the deposition of the acidifying species exceeded the critical loads.

【 授权许可】

CC BY-NC