生物多样性 ›› 2013, Vol. 21 ›› Issue (6): 651-657.doi: 10.3724/SP.J.1003.2013.07095

• • 上一篇    下一篇

青藏高原高寒草地植物多样性测定的最小样地面积

董世魁1, *(), 汤琳1, 王学霞1, 刘颖慧2, 刘世梁1, 刘全儒3, 吴娱1, 李媛媛1, 苏旭坤1, 赵晨1   

  1. 1 北京师范大学环境学院, 北京 100875
    2 北京师范大学资源学院, 北京 100875
    3 北京师范大学生命科学学院, 北京 100875
  • 收稿日期:2013-04-11 接受日期:2013-09-05 出版日期:2013-11-20
  • 通讯作者: 董世魁 E-mail:dongshikui@sina.com
  • 基金项目:
    国家“十二五”科技支撑项目(2012BAC01B02);环保部环保公益项目(201209033)

Minimum plot size for estimating plant biodiversity of the alpine grasslands on the Qinghai-Tibetan Plateau

Shikui Dong1, *(), Lin Tang1, Xuexia Wang1, Yinghui Liu2, Shiliang Liu1, Quanru Liu2, Yu Wu1, Yuanyuan Li1, Xukun Su1, Chen Zhao1   

  1. 1 School of Environment, Beijing Normal University, Beijing 100875
    2 College of Resources Science and Technology, Beijing Normal University, Beijing 100875
    3 College of Life Sciences, Beijing Normal University, Beijing 100875
  • Received:2013-04-11 Accepted:2013-09-05 Online:2013-11-20
  • Contact: Dong Shikui E-mail:dongshikui@sina.com

为科学设定青藏高原地区草地植物多样性研究的样地面积, 提高研究结果的精确性, 本研究拟合研究了7种模型, 分别筛选出高寒草甸、高寒草原和高寒荒漠3种草地类型的最优拟合模型, 并基于种-面积曲线计算各类草地植物多样性估测的适宜样地面积。结果表明: (1)非饱和曲线模型较适宜拟合青藏高原地区的种-面积关系; (2)3类高寒草地健康样地的最小面积均大于退化样地; (3)对于高寒草甸, 健康样地和退化样地的最小面积分别为108 m2和82 m2; 对于高寒草原, 健康样地和退化样地的最小面积分别为130 m2和81 m2 ; 对于高寒荒漠, 健康样地和退化样地的最小面积分别为60 m2和41 m2

关键词: 青藏高原, 高寒草地, 种-面积曲线, 最小样地面积

To determine the appropriate plot size for estimating plant diversity of different types of alpine grassland on the Qinghai-Tibetan Plateau (QTP), i.e. alpine meadow, alpine steppe and alpine desert, seven models were applied in the examination of species-area relationships. Depending on the optimal species-area relationship curves, the minimum sizes of sampling plot for each type of grassland under healthy and degraded conditions were obtained. The findings were as follows: (1) Non-saturation curve models were most suitable for describing species-area relationships of alpine grasslands on the QTP; (2) For all three types of alpine grassland, the minimum plot size for healthy grasslands was larger than that for degraded ones; (3) Minimum plot sizes for estimating plant diversity were 108 m2 and 82 m2, respectively, for healthy and degraded alpine meadow, 130 m2 and 81 m2, respectively, for healthy and degraded alpine steppe, and 60 m2 and 41 m2, respectively, for healthy and degraded alpine desert.

Key words: Qinghai-Tibetan Plateau, alpine grasslands, species-area relationship, minimum plot size

图1

样地种-面积曲线测定的取样示意图"

表1

青藏高原高寒草甸、高寒草原和高寒荒漠3类草地的种-面积曲线拟合结果"

草地类型
Grassland type
健康状况
Health status
方程
Function
a b c F Pr>F R2
高寒草甸
Alpine meadow
健康
Healthy
1 3.441 24.946 - 651.257 <0.0001 0.875
2 6.272 40.071 0.876 423.507 <0.0001 0.871
3 3.451 1,364.587 - 650.831 <0.0001 0.875
4 23.342 0.113 - 482.725 <0.0001 0.832
5 26.939 0.278 41.808 274.171 <0.0001 0.804
6 1.680 0.466 41.638 259.646 <0.0001 0.793
7 217.283 5.588 - 271.118 <0.0001 0.708
退化
Degraded
1 2.769 21.515 - 1,540.854 <0.0001 0.937
2 11.953 69.405 0.732 1,100.360 <0.0001 0.941
3 2.770 2,353.238 - 1,532.933 <0.0001 0.937
4 20.307 0.106 - 846.787 <0.0001 0.886
5 21.343 0.385 34.407 380.051 <0.0001 0.832
6 1.478 0.529 34.447 348.447 <0.0001 0.818
7 238.525 7.376 - 422.309 <0.0001 0.776
高寒草原
Alpine steppe
健康
Healthy
1 1.862 12.181 - 1,427.120 <0.0001 0.947
2 2.991 17.420 0.881 941.193 <0.0001 0.946
3 1.871 658.661 - 1,418.386 <0.0001 0.947
4 11.255 0.124 - 747.963 <0.0001 0.900
5 14.171 0.490 20.504 264.256 <0.0001 0.814
6 2.277 1.836 19.771 240.815 <0.0001 0.797
7 93.693 4.730 - 393.353 <0.0001 0.813
退化
Degraded
1 2.015 13.200 - 353.851 <0.0001 0.870
2 3.554 18.528 0.243 226.514 <0.0001 0.865
3 2.023 670.840 - 352.227 <0.0001 0.870
4 12.174 0.124 - 266.130 <0.0001 0.829
5 15.700 1.006 21.505 110.500 <0.0001 0.730
6 2.280 1.912 21.357 104.383 <0.0001 0.715
7 104.588 4.889 - 171.842 <0.0001 0.740
高寒荒漠
Alpine desert
健康
Healthy
1 0.911 4.119 - 113.059 <0.0001 0.776
2 0.039 1.206 6.395 99.742 <0.0001 0.827
3 1.062 29.764 - 128.208 <0.0001 0.801
4 3.298 0.189 - 156.035 <0.0001 0.834
5 8.207 0.023 10.542 71.423 <0.0001 0.764
6 3.284 0.112 9.667 63.087 <0.0001 0.735
7 2.141 0.221 - 70.931 <0.0001 0.659
退化
Degraded
1 0.367 1.876 - 70.169 <0.0001 0.545
2 0.448 1.911 0.929 44.850 <0.0001 0.527
3 0.387 108.802 - 71.025 <0.0001 0.550
4 1.644 0.156 - 67.907 <0.0001 0.533
5 2.858 0.680 3.477 38.833 <0.0001 0.468
6 4.215 2.275 3.399 38.392 <0.0001 0.463
7 6.695 1.886 - 60.357 <0.0001 0.487

表2

草地植物多样性估测精度和样地面积的关系"

草地类型
Grassland type
健康状况
Health status
最优拟合模型
Optimal function
不同精度下的样地面积
Plot areas under different accuracy (m2)
ρ= 60% ρ= 70% ρ= 80% ρ= 84% ρ= 90%
高寒草甸
Alpine meadow
健康 Healthy S = 24.956 + 3.441* lnA 5 24 108 197 481
退化 Degraded S = (69.405+11.952* lnA)0.732 6 33 210 455 1477
高寒草原
Alpine steppe
健康 Healthy S = 12.181 + 1.862 * lnA 13 61 279 514 1280
退化 Degraded S = 13.200 + 2.015 * lnA 17 81 386 720 1841
高寒荒漠
Alpine desert
健康 Healthy S = 3.298*A0.189 39 88 178 231 332
退化 Degraded S = 0.387*ln(108.802*A+1) 8 23 72 113 220

图2

各类草地的种-面积曲线图"

表3

各类草地植物多样性估测的最小样地面积"

草地类型
Grassland type
健康状况
Health status
平均总物种数
Average numbers of
plant species
占总物种比例
Proportions of total
species numbers
最小样地面积
Minimum area of
sampling plots
最小面积处曲线斜率
Slope at the minimum plot size
高寒草甸
Alpine meadow
健康 Healthy 51.33 80% 108 0.03
退化 Degraded 45.00 75% 82 0.03
高寒草原
Alpine steppe
健康 Healthy 28.33 75% 130 0.01
退化 Degraded 31.50 70% 81 0.02
高寒荒漠
Alpine desert
健康 Healthy 11.00 65% 60 0.02
退化 Degraded 4.33 75% 41 0.01
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