典型植被类型凋落叶汞浓度季节及地域分布特征

生态学杂志 ›› 2025, Vol. 44 ›› Issue (5): 1543-1550.

典型植被类型凋落叶汞浓度季节及地域分布特征

韩舒羽^1,2,3,牛香^1,2,3*,王兵^1,2,3,王章玮^4,5,张晓山^4,5,王强⁶,杜佳洁⁶,刘萍萍⁶

（¹中国林业科学研究院森林生态环境与自然保护研究所，北京 100091； ²国家林业和草原局森林生态环境重点实验室，北京 100091； ³江西大岗山森林生态系统国家野外科学观测研究站，江西新余 336606； ⁴中国科学院生态环境研究中心城市与区域生态国家重点实验室，北京 100085； ⁵中国科学院大学，北京 100049； ⁶沈阳农业大学，沈阳 110866）

出版日期:2025-06-10 发布日期:2025-05-13

Seasonal and geographic distribution characteristics of mercury concentration in leaf litter of typical vegetation types.

HAN Shuyu^1,2,3, NIU Xiang^1,2,3*, WANG Bing^1,2,3, WANG Zhangwei^4,5, ZHANG Xiaoshan^4,5, WANG Qiang⁶, DU Jiajie⁶, LIU Pingping⁶

(¹Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing 100091, China; ²Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration, Beijing 100091, China; ³Dagangshan National Key Field Observation and Research Station for Forest Ecosystem, Xinyu 336606, Jiangxi, China; ⁴State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; ⁵University of Chinese Academy of Sciences, Beijing 100049, China; ⁶ Shenyang Agricultural University, Shenyang 110866, China).

Online:2025-06-10 Published:2025-05-13

摘要/Abstract

摘要： 为了解典型植被类型叶凋落物汞浓度季节及地域分布规律特征，本研究于2020年8月至2021年10月，除选取贵州、吉林、陕西、湖北、辽宁、重庆等汞污染现象严重的代表地区外，还在全国七大地理区的每个地理区内至少选取2个省份收集主要优势树种叶凋落物，分析其汞浓度。结果表明：（1）在不同植被类型中，常绿阔叶林的凋落叶汞浓度（75.88±22.28 ng·g^-1，范围为41.68～181.58 ng·g^-1）是落叶阔叶林（38.58±30.65 ng·g^-1，范围为2.11～123.86 ng·g^-1）的1.97倍。（2）从季节规律来看，大多数树种的叶凋落物汞浓度随着生长期逐渐增加。（3）在空间尺度上，叶凋落物汞浓度呈现华东>华中>西南>华南>西北>东北>华北的趋势，华东地区叶凋落物汞浓度为77.57±29.65 ng·g^-1，范围为38.04～109.01 ng·g^-1，是东北地区叶凋落物汞浓度的3.01倍（25.73±8.28 ng·g^-1，范围为11.95～37.01 ng·g^-1）；在东北、华中和西北地区，汞污染严重地区的叶凋落物汞浓度高于非严重地区。本研究结果可用于指导汞污染地区造林树种的选择，也为评估森林生态系统汞吸收能力提供数据支撑。

关键词: 植被类型, 凋落物量, 叶汞浓度, 地理分区

Abstract: To clarify the seasonal and regional distribution of mercury (Hg) concentration in leaf litter of typical vegetations, we collected leaf litter of the main dominant tree species for Hg concentration analysis in representative areas with serious Hg pollution, including Guizhou, Jilin, Shaanxi, Hubei, Liaoning, and Chongqing, as well as at least two provinces in each of the seven geographic regions in China during August 2020 to October 2021. The results showed that: (1) Among the different vegetation types, Hg concentration in leaf litter of evergreen broad-leaved forests (75.88±22.28 ng·g^-1, ranging from 41.68 to 181.58 ng·g^-1) was 1.97 times as high as that of deciduous broad-leaved forests (38.58±30.65 ng·g^-1, ranging from 2.11 to 123.86 ng·g^-1). (2) In terms of seasonal pattern, leaf litter Hg concentration of most tree species increased gradually with the growing season. (3) On the spatial scale, leaf litter Hg concentration showed a trend of east China > central China > southwest China > south China > northwest China > northeast China > north China. Leaf litter Hg concentration in east China being 77.57±29.65 ng·g^-1 (ranging 38.04-109.01 ng·g^-1), which was 3.01 times higher than that in northeast China (25.73±8.28 ng·g^-1, ranging 11.95-37.01 ng·g^-1). In northeast China, central China and northwest China, leaf litter Hg concentration was higher in the heavily Hg-polluted sites than in the non-heavily polluted sites. Our results can be applied for the selection of afforestation species in Hg-polluted sites, and provide data support for assessing Hg absorption capacity of forest ecosystems.

Key words: vegetation type, litterfall amount, mercury concentration in leaf litter, geographic distribution

韩舒羽, 牛香, 王兵, 王章玮, 张晓山, 王强, 杜佳洁, 刘萍萍. 典型植被类型凋落叶汞浓度季节及地域分布特征[J]. 生态学杂志, 2025, 44(5): 1543-1550.

HAN Shuyu, NIU Xiang, WANG Bing, WANG Zhangwei, ZHANG Xiaoshan, WANG Qiang, DU Jiajie, LIU Pingping. Seasonal and geographic distribution characteristics of mercury concentration in leaf litter of typical vegetation types.[J]. Chinese Journal of Ecology, 2025, 44(5): 1543-1550.

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