城市土壤中多环芳香烃(PAHs)的空间变异性及香港地区种植树木的真菌病状况评估

IF 2.6 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES International Journal of Environmental Research Pub Date : 2024-08-25 DOI:10.1007/s41742-024-00629-y
Ka Chun Sung, Ho Man Leung, Chi Fung Lee, Tohidi Fatemeh, Wing Yin Mo, Lai Yan Woo, Kwai Chung Cheung, Uchenna Ogbonnaya, Ken Kin Lam Yung, Wai Chin Li
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引用次数: 0

摘要

本研究探討香港市區不同樹種的土壤化學參數及污染物濃度與木材腐朽真菌感染程度的關係。值得注意的是,这项研究发现不同树种的真菌感染率(0.78-24.3%)有显著差异(p < 0.05)。土壤样本的多环芳烃总含量介乎每公斤 0.47 至 3.33 毫克(干重),18 个取样点中有 13 个超过每公斤 1 毫克(干重)的荷兰目标值。主成分分析(PCA)结果显示,两个主成分对不同树种的真菌感染率有影响。其中,第一个成分与导电率(EC)有关(PC1:99.7%),第二个成分涉及氧化还原电位和硝酸盐浓度(PC2:0.2%)。此外,在所有地点的土壤中都观察到了高浓度的萘,涉及五种主要树种,分别是 Spathodea campanulata、Ficus microcarpa、Acacia confusa、Cinnamomum camphora 和 Lagerstroemia speciosa。PCA 结果表明,多环芳烃对这些树种的真菌感染有显著的促进作用。這些寶貴的基線資料有助香港進一步發展有效的市區樹木管理策略,減輕土壤質量對市區樹木健康的不良影響,尤其是在全球變暖和極端天氣的情況下。
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Assessment of Spatial Variability of Polycyclic Aromatic Hydrocarbons (PAHs) in Urban Soils and Fungal Disease Status of Trees Grown in Hong Kong Areas

This research investigates the relationship between the chemical parameters and pollutant concentration of soil and the extent of infection of wood decay fungi across various tree species in urban areas of Hong Kong. Notably, this research uncovered significant differences (p < 0.05) in fungal infection rates among different tree species (0.78–24.3%). The total concentration of PAHs in the soil samples collected ranged from 0.47 to 3.33 mg/kg (dry weight), with 13 out of the 18 sampling sites exceeding the Dutch Target Values (DTVs) of 1 mg/kg (dry weight). Principal components analysis (PCA) results revealed the influence of two principal components on the fungal infection rates among tree species. In particular, the first component was associated with electrical conductivity (EC) (PC1: 99.7%), while the second component involved redox potential and nitrate concentration (PC2: 0.2%). Furthermore, high concentrations of naphthalene were observed in soils at all sites across five major tree species, namely Spathodea campanulata, Ficus microcarpa, Acacia confusa, Cinnamomum camphora, and Lagerstroemia speciosa. The PCA results suggested that PAHs significantly contributed to fungal infection in these tree species. Such valuable baseline information can aid in the further development of effective urban tree management strategies in Hong Kong, mitigating the adverse impacts of soil quality on urban tree health, particularly in the face of global warming and extreme weather conditions.

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来源期刊
CiteScore
5.40
自引率
0.00%
发文量
104
审稿时长
1.7 months
期刊介绍: International Journal of Environmental Research is a multidisciplinary journal concerned with all aspects of environment. In pursuit of these, environmentalist disciplines are invited to contribute their knowledge and experience. International Journal of Environmental Research publishes original research papers, research notes and reviews across the broad field of environment. These include but are not limited to environmental science, environmental engineering, environmental management and planning and environmental design, urban and regional landscape design and natural disaster management. Thus high quality research papers or reviews dealing with any aspect of environment are welcomed. Papers may be theoretical, interpretative or experimental.
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