[1]高若允,杨柳生,田 雪,等.干热河谷阴、阳坡失稳性坡面植被与环境因子关系的冗余分析[J].山地学报,2022,(6):835-846.[doi:10.16089/j.cnki.1008-2786.000717]
 GAO Ruoyun,YANG Liusheng,TIAN Xue,et al.Redundancy Analysis of the Relationship Between Plant and Environmental Factors on Shady and Sunny Unstable Slope in Dry-hot Valley[J].Mountain Research,2022,(6):835-846.[doi:10.16089/j.cnki.1008-2786.000717]
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干热河谷阴、阳坡失稳性坡面植被与环境因子关系的冗余分析()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2022年第6期
页码:
835-846
栏目:
山地环境
出版日期:
2022-12-20

文章信息/Info

Title:
Redundancy Analysis of the Relationship Between Plant and Environmental Factors on Shady and Sunny Unstable Slope in Dry-hot Valley
文章编号:
1008-2786-(2022)6-835-12
作者:
高若允123杨柳生123田 雪123杨鸿飞123林勇明123*
(1.福建农林大学 林学院,福州 350002; 2.中国科学院、水利部成都山地灾害与环境研究所 山地灾害与地表过程重点实验室,成都 610299; 3.福建省高校森林生态系统过程与经营重点实验室,福州 350002)
Author(s):
GAO Ruoyun123 YANG Liusheng123 TIAN Xue123 YANG Hongfei123 LIN Yongming123*
(1. College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China; 2. Key Laboratory of Mountain Hazards and Surface Processes, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Resources, Chengdu 610299, China; 3. Key Laboratory for Forest Ecosystem Process and Management of Fujian Province, Fuzhou 350002, China)
关键词:
干热河谷 失稳性坡面 植被 环境因子 冗余分析 蒋家沟
Keywords:
dry-hot valley unstable slope vegetation environmental factors redundancy analysis Jiangjiagou
分类号:
X43
DOI:
10.16089/j.cnki.1008-2786.000717
文献标志码:
A
摘要:
中国干热河谷区失稳性坡面不仅是泥石流频发流域的治理重点,也是抑制谷内生态系统持续逆向演变的关键。针对干热河谷失稳性坡面脆弱生态系统方面的研究,仍未全面深入探讨失稳性坡面上植被与环境因子间的内在联系,缺乏针对性的生态恢复措施。本文以中国云南东川蒋家沟干热河谷阴、阳坡失稳性坡面为研究对象,在野外调查采样和室内试验的基础上,利用冗余分析(RDA)探究干热河谷失稳性坡面上植被养分、多样性特征与环境因子间的关系。结果表明:(1)阳坡各区段植被地上部分碳、氮元素含量显著大于地下部分,稳定区显著大于堆积区(P<0.05),阴坡仅堆积区植被地上部分碳、氮元素含量显著大于地下部分,失稳区地上部分氮元素含量显著大于地下(P<0.05)。(2)阳坡Margalef丰富度指数、Shannon-Wiener多样性指数、Simpson优势度指数和Pielou均匀度指数均显著大于阴坡(P<0.05),且4个指数在阴、阳坡分布规律不一致,具体表现为阳坡稳定区显著大于堆积区,阴坡堆积区显著大于失稳区(P<0.05)。(3)随着坡面稳定程度的降低,土壤有机碳、含水率、全氮和水解氮含量出现不同程度的减小,容重、全磷和速效磷含量则增大。(4)RDA分析结果表明环境因子很好地解释了植被养分、多样性指数的变化,坡向、区段、容重是显著影响因子,其对植被养分、多样性指数的解释率分别为14.53%、44.42%; 24.36%、4.18%; 6.67%、2.58%。研究结果反映了干热河谷植被养分、物种多样性特征对环境因子的响应和适应策略,可为干热河谷失稳性坡面治理与植被恢复提供理论支撑。
Abstract:
Unstable slopes in dry-hot valleys of Southwest China are not only the focus of debris flow basin management, but also the key to inhibit the continuous reverse evolution of ecosystems in valleys. However, for the study of fragile ecosystems on unstable slopes in dry-hot valleys, the internal relationship between vegetation and environmental factors on unstable slopes has not been fully explored, and there is a lack of targeted ecological restoration measures.
In this paper, the shady and sunny unstable slopes in the Jiangjiagou dry-hot valley in Dongchuan, Yunnan province, China were selected for field surveys and samples collection. The nutrient contents of the aboveground and underground parts of vegetation and the physicochemical properties of soil were determined. Redundancy analysis(RDA)was used to investigate the relationship between vegetation nutrients, diversity characteristics and environmental factors on unstable slopes.
The results showed that:(1)The nutrient content of plants in different slope aspects differed significantly between the aboveground and the underground. The aboveground carbon and nitrogen contents of plants in different areas of the sunny slope were significantly larger than those of the underground respectively(P<0.05), while they were significantly larger in unstable and deposition areas of the shady slope than the underground, and the stable area was significantly larger than that in the deposition area(P<0.05).(2)The Margalef richness index, Shannon-Wiener diversity index, Simpson dominance index, and Pielou evenness index in sunny slope were significantly larger than the shady slope(P<0.05). These four indexes had higher values in stable area than in deposition area for sunny slope, whereas they were reverse for shady slope(P<0.05).(3)Soil organic carbon, water content, total nitrogen and hydrolyzed nitrogen decreased with the decrease of slope stability, whereas soil bulk density, total phosphorus and available phosphorus increased.(4)The RDA results showed that environmental factors well explained the changes of vegetation nutrients and diversity index. Aspect, section, and soil bulk density were the significant influencing factors, explaining 14.53% and 44.42%, 24.36% and 4.18%, and 6.67% and 2.58% of the variations in vegetation nutrients and diversity index, respectively. The results revealed the response and adaptation strategies of vegetation nutrient characteristics and species diversity characteristics to different environmental factors in dry-hot valley. This research also can provide a theoretical basis for the treatment of unstable slopes and the restoration of vegetation ecosystems in dry-hot valleys.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2022-08-30; 改回日期(Accepted date): 2022-12-15
基金项目(Foundation item): 国家自然科学基金(42071132); 中国科学院山地灾害与地表过程重点实验室开放研究基金(20190402)。[National Natural Science Foundation of China(42071132); Research Fund of Key Laboratory of Mountain Disasters and Surface Processes, Chinese Academy of Sciences(20190402)]
作者简介(Biography): 高若允(1998-),女,河南商丘人,硕士研究生,主要研究方向:植物地理学。[GAO Ruoyun(1998-), female, born in Shangqiu, Henan province, M.Sc. candidate, research on phytogeography] E-mail: 18339160891@163.com
*通讯作者(Corresponding author): 林勇明(1982-),男,福建福安人,博士,教授,主要研究方向:区域资源优化、生态学。[LIN Yongming(1982-), male, born in Fu'an, Fujian province, Ph.D., professor, research on optimization of regional resources and ecology] E-mail: monkey1422@163.com
更新日期/Last Update: 2022-12-30