[1]吴 巧a,李澧洪b,张克海,等.祁连山青海云杉林动态监测样地苔藓枯落物空间异质性[J].山地学报,2025,(2):185-194.[doi:10.16089/j.cnki.1008-2786.000885]
　WU Qiaoa,LI Lihongb,ZHANG Kehai,et al.Spatial Heterogeneity of Bryophyte-Litter Composition at Large-Plot Scale in Picea Crassifolia Forest in the Qilian Mountains, China[J].Mountain Research,2025,(2):185-194.[doi:10.16089/j.cnki.1008-2786.000885]
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祁连山青海云杉林动态监测样地苔藓枯落物空间异质性()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2025年第2期
页码:
185-194
栏目:
山地环境
出版日期:
2025-06-25

文章信息/Info

Title:
Spatial Heterogeneity of Bryophyte-Litter Composition at Large-Plot Scale in Picea Crassifolia Forest in the Qilian Mountains, China
文章编号:
1008-2786-(2025)2-185-10
作者:
吴 巧1a; 李澧洪1b; 张克海2; 赵维俊2; 刘淑英1a*
(1.甘肃农业大学 a.资源与环境学院; b. 管理学院,兰州 730070; 2.甘肃省祁连山水源涵养林研究院 祁连山森林生态系统国家定位观测研究站,甘肃 张掖 734000)
Author(s):
WU Qiao1a;  LI Lihong1b;  ZHANG Kehai2;  ZHAO Weijun2;  LIU Shuying1a*
(1. a. College of Resources and Environmental Sciences; b. School of Management, Gansu Agricultural University, Lanzhou 730070, China; 2. State Positioning Observation and Research Station of Forest Ecosystem of the Qilian Mountain, Gansu Province Academy of Water Conservation Forest of the Qilian Mountains, Zhangye 734000, Gansu, China)
关键词:
苔藓枯落物;  青海云杉林;  动态监测样地;  空间异质性;  大野口流域
Keywords:
bryophyte-litter composition;  Picea crassifolia forest;  dynamics monitoring plot;  spatial heterogeneity;  the Dayekou basin
分类号:
S718.5
DOI:
10.16089/j.cnki.1008-2786.000885
文献标志码:
A
摘要:
苔藓枯落物是森林生态系统物质循环的关键介质,通过截留降水、抑制蒸发等生态调节功能,实现水土保持与水源涵养双重功效,对土壤水文过程调控及森林天然更新具有不可替代作用。前期研究已初步揭示其水热特性及养分循环功能,但多局限于单一功能指标的静态描述,且缺乏大尺度空间异质性的实证分析。本研究以祁连山大野口流域10.2 hm2(340 m×300 m)青海云杉林动态监测样地内的苔藓枯落物为对象,采用网格法对249个20 m×20 m 样方进行采样,测定盖度、厚度及生物量参数,结合地统计学方法解析其空间异质性特征及地形驱动机制。研究结果表明:(1)苔藓枯落物盖度为中等变异性(CV=21.25%),而厚度(CV=41.74%)与生物量(CV=38.99%)均属强变异等级,空间结构最优拟合模型为指数函数。(2)苔藓枯落物分布格局具有显著的斑块性。盖度、厚度和生物量对应的空间结构比分别为93.30%、91.50%和93.50%,呈强烈的空间自相关; 盖度在各方向上分布均衡; 西北—东南方向是厚度的优势空间格局; 东—西方向是生物量的优势空间格局。(3)苔藓枯落物的生物量与平均海拔和平面曲率呈正显著相关(P<0.05),与坡向呈负显著相关(P<0.05); 盖度和厚度与地形因子的相关性均不显著。这表明,苔藓枯落物分布具有显著地形驱动的空间异质性,海拔与坡向是主导其空间格局的关键地形因子。本研究构建了大样地尺度下苔藓枯落物空间格局解析框架,可为祁连山水源涵养林生态系统管理与生物多样性保护提供科学依据。
Abstract:
Bryophyte-litter composition serves as a critical medium in the nutrient cycle of forest ecosystems. By intercepting precipitation, inhibiting evaporation and other ecological regulation functions, it achieves dual effects of soil-water conservation and water retention, leading to irreplaceable effects on soil hydrological process regulation and forest natural regeneration. Former studies preliminarily revealed the hydrothermal characteristics and nutrient cycling function of bryophyte-litter composition, but mostly were limited to a descriptive elucidation of a single functional indicators, and lacked empirical analyses of spatial heterogeneity at large-plot scale.
In this study it investigated the spatial heterogeneity of bryophyte-litter composition using geostatistical methods and its correlation with topographic factors in a representative cold-temperate ecosystem—Qinghai spruce(Picea crassifolia)forest in the Dayekou basin of the Qilian Mountains, northwestern China. Based on a 10.2 hm2(340 m×300 m)dynamic monitoring plot, it systematically sampled 249 gridded quadrats(20 m×20 m)and measured three core indicators: coverage, thickness, and biomass.
(1)It found that the coverage of bryophyte-litter composition exhibited moderate spatial variability(CV=21.25%), while thickness indicator(CV=41.74%)and biomass indicator(CV=38.99%)demonstrated strong variability, with an exponential model providing the optimal fit for spatial structure variability.
(2)The distribution pattern of bryophyte-litter composition was patchy with spatial structure ratios of 0.933, 0.915, and 0.935 for the coverage, thickness, and biomass indicator, respectively, indicating strong spatial autocorrelation. The coverage was isotropically distributed in space layout; The thickness exhibited a dominant northwest-southeast orientation, and the biomass showed an east-west preferential trend.
(3)The biomass of bryophyte-litter composition was positively and significantly correlated with average altitude and plane curvature(P<0.05), and negatively significantly correlated with slope aspect(P<0.05). The correlation between coverage and thickness and topographic factors was not significant. This indicates that the distribution of bryophyte-litter composition had significant topography-driven spatial heterogeneity, and altitude and aspect were the key topographic factors governing its spatial pattern.
This study establishes a framework for analyzing bryophyte-litter composition spatial patterns at a large-plot scale, providing scientific insights for ecosystem management and biodiversity conservation of water conservation forests in the Qilian Mountain, China.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2024-12-27; 改回日期(Accepted date):2025- 04-14
基金项目(Foundation item): 张掖市市级科技计划项目(ZY2023RC10, ZY2024RC16); 国家自然科学基金(32060247)。[Zhangye Municipal Science and Technology Program Projects(ZY2023RC10, ZY2024RC16); National Natural Science Foundation of China(32060247)]
作者简介(Biography): 吴巧(2001-),女,甘肃张掖人,硕士研究生,主要研究方向:森林与土壤生态。[WU Qiao(2001-), female, born in Zhangye, Gansu Province, M.Sc. candidate, research on forest and soil ecology] E-mail:1246876658@qq.com
*通讯作者(Corresponding author): 刘淑英(1965-),女,教授,主要研究方向:土壤生态学、土壤学。[LIU Shuying(1965-), female, professor, research on soil ecology and soil science] E-mail: liusy@gsau.edu.cn
更新日期/Last Update: 2025-03-30