林业科学 ›› 2021, Vol. 57 ›› Issue (2): 168-178.doi: 10.11707/j.1001-7488.20210217
董雪1,5,李永华2,3,4,*,辛智鸣1,5,段瑞兵1,5,姚斌2,包岩峰2,张正国2,刘源1,5
收稿日期:
2019-08-28
出版日期:
2021-02-25
发布日期:
2021-03-29
通讯作者:
李永华
基金资助:
Xue Dong1,5,Yonghua Li2,3,4,*,Zhiming Xin1,5,Ruibing Duan1,5,bin Yao2,Yanfeng Bao2,Zhengguo Zhang2,Yuan Liu1,5
Received:
2019-08-28
Online:
2021-02-25
Published:
2021-03-29
Contact:
Yonghua Li
摘要:
目的: 分析河西走廊西段灌木群落结构特征在海拔梯度上的分布规律,探讨荒漠戈壁灌木群落物种多样性的空间分布格局。方法: 以甘肃荒漠戈壁灌木群落为对象,在800~3 200 m的海拔范围内设置12个海拔梯度,探讨物种多样性沿海拔的变化特征。结果: 荒漠戈壁灌木群落类型沿海拔从低到高依次有沙拐枣+梭梭群落、泡泡刺群落、沙拐枣+泡泡刺群落、泡泡刺+红砂+沙拐枣+膜果麻黄群落、合头草+红砂群落、泡泡刺+红砂群落、合头草+盐爪爪+红砂群落、灌木亚菊+细枝盐爪爪群落、合头草群落、盐爪爪群落、盐爪爪+红砂群落、红砂群落,其中,红砂、合头草和泡泡刺等为分布范围较大的优势种;群落的α多样性指数沿海拔梯度从低到高呈先增加后降低的单峰型分布格局,最大值出现在海拔2 000~2 200 m内,其中,丰富度Gleason、Margalef指数和多样性Shannon-Wiener、Simpson指数随海拔上升表现出显著的单峰型格局(P < 0.05),海拔显著影响荒漠戈壁灌木群落的物种多样性(P < 0.05);虽然年均降水量和年均气温与海拔极显著相关(P < 0.01),但物种多样性与年均降水量和年均气温的相关性均未达到显著水平(P>0.05);群落物种多样性指数偏低,群落结构简单,物种组成稀少;大多数相邻海拔梯度间灌木群落的Jaccard相似水平较低。结论: 河西走廊西段荒漠戈壁以灌木为优势种的群落呈区域性的斑块状分布格局。不同海拔梯度内灌木群落的建群种都发生了变化。物种多样性在海拔梯度上呈先升后降的单峰分布格局。
中图分类号:
董雪, 李永华, 辛智鸣, 段瑞兵, 姚斌, 包岩峰, 张正国, 刘源. 河西走廊西段荒漠戈壁灌木群落物种多样性的海拔格局[J]. 林业科学, 2021, 57(2): 168-178.
Xue Dong, Yonghua Li, Zhiming Xin, Ruibing Duan, bin Yao, Yanfeng Bao, Zhengguo Zhang, Yuan Liu. Patterns of Altitudinal Distribution of Species Diversity of Desert Gobi Shrub Communities in West Hexi Corridor of China[J]. Scientia Silvae Sinicae, 2021, 57(2): 168-178.
表1
研究区域12个海拔梯度样地特征"
海拔梯度 Elevation gradient/m | 样地数量 Sample number | 平均灌木高 Mean shrub height/cm | 平均冠幅 Mean crown diameter/m2 | 灌木密度 Shrub density/hm-2 | 盖度 Coverage(%) | 年均降水量 Mean annual precipitation/mm | 年均温度 Mean annual temperature/℃ |
800~1 000 | 6 | 97.33±13.33 | 0.77±0.07 | 1.13±0.14 | 4.34±0.63 | 38.02±6.80 | 9.22±0.91 |
1 000~1 200 | 10 | 49.09±6.72 | 1.17±0.10 | 0.97±0.12 | 5.69±0.83 | 48.69±8.71 | 8.33±0.72 |
1 200~1 400 | 6 | 57.21±7.84 | 0.59±0.05 | 4.32±0.52 | 12.73±1.86 | 66.51±11.90 | 7.12±0.62 |
1 400~1 600 | 10 | 48.04±6.58 | 0.35±0.03 | 3.02±0.36 | 5.34±0.78 | 67.22±12.03 | 6.51±0.57 |
1 600~1 800 | 10 | 29.15±3.99 | 0.30±0.03 | 7.04±0.84 | 10.68±1.56 | 85.67±15.33 | 6.14±0.53 |
1 800~2 000 | 9 | 33.53±4.59 | 0.34±0.03 | 6.04±0.72 | 10.15±1.48 | 97.09±17.37 | 5.79±5.51 |
2 000~2 200 | 7 | 21.80±2.99 | 0.29±0.03 | 10.06±1.21 | 14.50±2.12 | 111.60±19.97 | 5.03±0.44 |
2 200~2 400 | 5 | 14.99±2.05 | 0.18±0.02 | 25.10±3.01 | 23.20±3.39 | 178.20±30.26 | 3.32±0.29 |
2 400~2 600 | 5 | 25.81±3.54 | 0.13±0.01 | 14.23±1.71 | 9.41±1.37 | 170.10±25.69 | 3.20±0.28 |
2 600~2 800 | 5 | 16.98±2.33 | 0.10±0.01 | 30.78±3.69 | 15.03±2.19 | 210.72±33.58 | 2.52±0.19 |
2 800~3 000 | 4 | 19.62±2.69 | 0.09±0.01 | 29.76±3.57 | 13.97±2.04 | 215.64±30.89 | 2.52±0.22 |
3 000~3 200 | 5 | 14.59±2.01 | 0.09±0.01 | 28.12±3.37 | 12.44±1.82 | 228.53±31.59 | 2.54±0.25 |
表2
不同海拔梯度灌木群落物种组成及其重要值"
物种Species | 海拔梯度Elevation gradient /m | |||||||||||
800~1 000 | 1 000~1 200 | 1 200~1 400 | 1 400~1 600 | 1 600~1 800 | 1 800~2 000 | 2 000~2 200 | 2 200~2 400 | 2 400~2 600 | 2 600~2 800 | 2 800~3 000 | 3 000~3 200 | |
红砂Reaumuria songarica | 0.017 | 0.010 | 0.074 | 0.184 | 0.214 | 0.204 | 0.143 | 0.041 | 0.210 | 0.216 | 0.264 | 0.428 |
合头草Sympegma regelii | 0.009 | 0.008 | 0.108 | 0.228 | 0.132 | 0.223 | 0.053 | 0.406 | 0.126 | 0.080 | ||
泡泡刺Nitraria sphaerocarpa | 0.075 | 0.619 | 0.267 | 0.189 | 0.103 | 0.226 | 0.021 | 0.181 | ||||
膜果麻黄Ephedra przewalskii | 0.099 | 0.044 | 0.013 | 0.156 | 0.058 | 0.053 | 0.088 | 0.005 | 0.086 | |||
盐爪爪Kalidium foliatum | 0.006 | 0.005 | 0.023 | 0.123 | 0.182 | 0.156 | 0.337 | 0.446 | ||||
沙拐枣Calligonum mongolicum | 0.302 | 0.051 | 0.318 | 0.161 | 0.004 | |||||||
梭梭Haloxylon ammodendron | 0.257 | 0.100 | 0.070 | 0.038 | 0.035 | |||||||
霸王Sarcozygium xanthoxylon | 0.048 | 0.045 | 0.022 | 0.015 | 0.012 | 0.021 | ||||||
柽柳Tamarix chinensis | 0.096 | 0.150 | 0.096 | 0.005 | ||||||||
灌木亚菊Ajania fruticulosa | 0.015 | 0.004 | 0.037 | 0.358 | 0.047 | 0.146 | ||||||
裸果木Gymnocarpos przewalskii | 0.011 | 0.010 | 0.043 | 0.015 | 0.004 | 0.016 | 0.047 | |||||
紫菀木Asterothamnus alyssoides | 0.007 | 0.057 | 0.020 | 0.017 | 0.014 | 0.034 | 0.062 | 0.031 | ||||
灌木铁线莲Clematis fruticosa | 0.009 | 0.018 | 0.003 | 0.011 | ||||||||
蓍状亚菊Ajania achilloides | 0.011 | 0.050 | 0.052 | 0.053 | 0.066 | 0.097 | 0.186 | |||||
短叶假木贼Anabasis brevifolia | 0.061 | 0.029 | 0.052 | 0.015 | ||||||||
松叶猪毛菜Salsola laricifolia | 0.007 | 0.005 | 0.001 | 0.045 | ||||||||
细枝盐爪爪Kalidium gracile | 0.016 | 0.039 | 0.107 | 0.250 | 0.089 | 0.113 | 0.210 | |||||
驼绒藜Ceratoide slatens | 0.012 | 0.008 | 0.002 | 0.044 | 0.041 | |||||||
毛刺锦鸡儿Caragana tibetica | 0.007 | 0.011 | 0.047 | |||||||||
刺叶柄棘豆Oxytropis aciphylla | 0.002 | 0.002 | ||||||||||
黑沙蒿Artemisia ordosica | 0.002 | 0.008 | 0.002 | |||||||||
骆驼刺Alhagi sparsifolia | 0.154 | 0.012 | ||||||||||
小叶金露梅Potentilla parvifolia | 0.082 | |||||||||||
大果白刺Nitraria roborowskii | 0.023 | |||||||||||
盐穂木Halostachys caspica | 0.020 | |||||||||||
尖叶盐爪爪Kalidium cuspidatum | 0.021 | |||||||||||
珍珠猪毛菜Salsola passerina | 0.023 | |||||||||||
沙木蓼Atraphaxis bracteata | 0.004 | |||||||||||
白沙蒿Artemisia sphaerocephala | 0.014 | 0.007 | ||||||||||
荒漠锦鸡儿Caragana roborovskyi | 0.017 | 0.024 | ||||||||||
旱蒿Artemisia xerophytica | 0.023 | |||||||||||
木本猪毛菜Salsola arbuscula | 0.015 |
表3
灌木群落物种多样性与环境因子的相关系数①"
项目 Item | 海拔 Elevation | 经度 Longitude | 纬度 Latitude | 年均降水量 Mean annual precipitation | 年均气温 Mean annual temperature |
Gleason指数Gleason index | 0.315** | 0.461** | 0.581** | 0.039 | -0.108 |
Margalef指数Margalef index | 0.333** | 0.304** | 0.523** | 0.102 | -0.055 |
Pielou指数Pielou index | 0.330** | 0.454** | 0.524** | 0.089 | -0.106 |
Mclntosh指数Mclntosh index | 0.352** | 0.359** | 0.344** | 0.103 | -0.075 |
Shannon-Wiener指数Shannon-Wiener index | 0.330** | 0.454** | 0.524** | 0.089 | -0.106 |
Simpson指数Simpson index | 0.289** | 0.412** | 0.438** | 0.091 | -0.090 |
海拔Elevation | 1.000 | ||||
经度Longitude | 0.361** | 1.000 | |||
纬度Latitude | -0.152 | 0.527** | 1.000 | ||
年均降水量Mean annual precipitation | 0.870** | 0.387** | -0.354** | 1.000 | |
年均气温Mean annual temperature | -0.820** | -0.333** | 0.321** | -0.850** | 1.000 |
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