University of Agriculture in Kraków, Faculty of Forestry, Department of Forest Engineering, Al. 29 Listopada 46, 31-425, Kraków, Poland.
University of Leeds, Faculty of Environment, School of Geography, Leeds, LS6 9JT, UK.
Environ Pollut. 2018 Nov;242(Pt B):1176-1184. doi: 10.1016/j.envpol.2018.08.015. Epub 2018 Aug 7.
The canopy water storage capacity (S) is an important parameter for the hydrological cycle in forests. One factor which influences the S is leaf texture, which in turn is thought to be affected by the contents of polycyclic aromatic hydrocarbons (PAHs). In order to improve our understanding of S we simulated rainfall and measured the S of coniferous species growing under various conditions. The contents of 18 PAHs were measured in the needles. The species chosen were: Scots pine (Pinus sylvestris L), Norway spruce (Picea abies (L.) H. Karst) and silver fir (Abies Alba Mill.). Sample branches were collected in 3 locations: A - forest; B - housing estate; C - city center. We found that PAHs have a significant impact on the S of tree crowns. The increase in the total content of all of polycyclic aromatic hydrocarbons (SUM.PAH) translates into an increase of S for all species. The S is the highest for the P. abies species, followed by P. sylvestris and A. alba at all locations. Within the same species, an increase in the value of S is associated with an increase in the PAH content in needles measured by gas chromatography. For A.alba, the average S increased from 11.54% of the total amount of simulated rain (ml g) at location A, to 17.10% at location B, and 21.02% at location C. Similarly for P. abies the S was 21.78%, 29.06% and 34.36% at locations A, B and C respectively. The study extends the knowledge of the mechanisms of plant surface adhesion and the anthropogenic factors that may modify this process as well as foliage properties.
林冠蓄水量（S）是森林水文循环的一个重要参数。影响 S 的一个因素是叶片质地，而叶片质地又被认为受到多环芳烃（PAHs）含量的影响。为了更好地了解 S，我们模拟降雨并测量了在不同条件下生长的针叶树种的 S。在针叶中测量了 18 种多环芳烃的含量。选择的树种为：欧洲赤松（Pinus sylvestris L）、挪威云杉（Picea abies（L.）H. Karst）和银枞（Abies Alba Mill.）。在 3 个地点收集了样本树枝：A-森林；B-住宅区；C-市中心。我们发现 PAHs 对树冠 S 有显著影响。所有多环芳烃（SUM.PAH）总含量的增加会导致所有树种 S 的增加。在所有地点，P. abies 物种的 S 最高，其次是 P. sylvestris 和 A. alba。在同一物种内，S 值的增加与通过气相色谱法测量的针叶中 PAH 含量的增加相关。对于 A. alba，从 A 点位置的模拟降雨量（ml g）总量的 11.54%到 B 点位置的 17.10%，再到 C 点位置的 21.02%，平均 S 呈上升趋势。对于 P. abies，S 值分别为 21.78%、29.06%和 34.36%，在 A、B 和 C 点位置。该研究扩展了植物表面附着力的机制知识以及可能改变这一过程的人为因素以及叶片特性。
