doi:

DOI: 10.3724/SP.J.1148.2011.00054

Arid Zone Research (干旱区研究) 2011/28:1 PP.54-59

Study on Species-area Relationships in the Southern and Northern Slopes of the Tianshan Mountains


Abstract:
Species-area relationships (SARs) were discussed in the past decades, and they were supposed to be one of the few “genuine law” in ecology. Xinjiang is located in the hinterland of the Eurasia, where there is a high radiation but a low precipitation. In this study, the patterns and mechanisms of SARs in different arid vegetation types in the Tianshan Mountains were explored by investigating sample plots. The species-area curves of steppe, meadow and desert were charted based on 26 nested sample plots, the minimum area of each nested sample plot was 0.25 m2, and the maximum one was 400 m2. All species in each sub-plot were recorded to develop SARs. The logarithmic form power curve (S = c·Az) was applied to fit SARs, and then SARs from different areas were compared with climatic variables by plotting the slope (z value) and intercept (c value) to explore the main factors affecting the patterns of SARs in Xinjiang. The power-law model was used to explain 0.90 ± 0.01 of variance of species richness at different scales. The average value of overall slope was 0.20±0.02, lower than the mean of the world. The slopes of steppe and meadow were 0.13±0.01 and 0.14±0.02 respectively. There was no significant difference between the two vegetation types. However, these two figures were significantly lower than that of desert (0.28±0.02). The climatic variables were classified into three groups: energy, water and climatic stability. In the full climatic models, all the factors were used to explain 80.42% of z value and 91.90% of c value respectively. In all the three factors, water factor was the most important for SARs, and the R2 values of z and c were 69.88% and 66.22% respectively. However, the effects of water factor on z value and c value were quite different, and z value was decreased but c value was increased with the increase of water factor. Similarly, z value was decreased but c value was increased with the increase of species richness. The results reveal that water was the main factor affecting the species-area relationship in this area, and the species richness also played an important role.

Key words:steppe,meadow,desert,biodiversity,moisture cointent,species richness,Tianshan Mountains,Xinjiang

ReleaseDate:2014-07-21 15:54:29



[1] Arita H T,Rodríguez P.Geographic range,turnover rate and the scaling of species diversity[J].Ecography,2002, 25:541-550.

[2] Willig M R,Kaufman D M,Stevens R D.Latitudinal gradients of biodiversity:Pattern,process,scale,and synthesis[J].Annual Review of Ecology,Evolution,and Systematics,2003,34:273-309.

[3] Sarr D A,Hibbs D E,Huston M A.A hierarchical perspective of plant diversity[J].The Quarterly Review of Biology,2005,80:187-212.

[4] Leps J, Stursa J.Species-area curve,life history strategies,and succession:A field test of relationships[J].Vegetation,1989,83:249-257.

[5] Worthen W B.Community composition and nested-subset analyses:Basic descriptors for community ecology[J].Oikos,1996, 76:417-426.

[6] Lomolino M V.Ecology’s most general,yet protean pattern:The species-area relationship[J].Journal of Biogeography,2000,27:17-26.

[7] 唐志尧,乔秀娟,方精云.生物群落的种-面积关系[J].生物多样性,2009,17(6):549-559.[Tang Zhiyao,Qiao Xiujuan,Fang Jingyun.Species-area relationship in biological communities[J].Biodiversity Science,2009,17(6):549-559.]

[8] Weiher E.The combined effects of scale and productivity on species richness[J].Journal of Ecology,1999, 87:1 005-1 011.

[9] Qian H,Fridley J D,Palmer M W.The latitudinal gradient of species-area relationships for vascular plants of North America[J].American Naturalist,2007,170:690-701.

[10] Drakare S,Lennon J J,Hillebrand H.The imprint of the geographical,evolutionary and ecological context on species-area relationships[J].Ecology Letters,2006,9:215-227.

[11] 中国科学院新疆综合考察队.新疆地貌[M].北京:科学出版社,1978.[Xinjiang Integrated Survey Team.The Physiognomy in Xinjiang[M].Beijing:Science Press,1978.]

[12] 中国科学院新疆综合考察队,中国科学院植物研究所.新疆植被及其利用[M].北京:科学出版社,1978.[Xinjiang Institute of Comprehensive Exploration Team of Chinese Academy of Sciences,Institute of Botany of Chinese Academy of Science.Vegetation and Its Use in Xinjiang[M].Beijing:Science Press,1978.]

[13] 方精云.我国森林植被带的生态气候学分析[J].生态学杂志,1991,11(4):377-387.[Fang Jingyun.Ecoclimatological analysis of the forest zones in China[J].Acta Ecologia Sinica,1991,11(4):377-387.]

[14] Arrhenius O.Species and area[J].Journal of Ecology,1921,9:95-99.

[15] Preston F W.The canonical distribution of commonness and rarity:Part I[J].Ecology,1962,43:185-215.

[16] Tjorve E.Shapes and functions of species-area curves:A review of possible models[J].Journal of Biogeography,2003,30:827-835.

[17] He F L,Legendre P.On species-area relations[J].Amarican Naturalist,1996,148:719-737.

[18] Scheiner S M.Six types of species-area curves[J].Global Ecology and Biogeography,2003,12:441-447.

[19] Abbott I.The meaning of z in species-area regressions and the study of species turnover in island biogeography[J].Oikos,1983,41:385-390.

[20] Connor E F,McCoy E D.Statistics and biology of the species-ares relationship[J].American Naturalist,1979,113:791-833.

[21] Fridley J D,Peet R K,Wentworth T R,et al.Connecting fine-and broad-scale species-area relationships of southeastern US flora[J].Ecology,2005,86:1 172-1 177.

[22] Leitner W A,Rosenzweig M L.Nested species-area curves and stochastic sampling:A new theory[J].Oikos,1997,79:503-512.

[23] Harte J,Kinzig A,Green J.Self-similarity in the distribution and abundance of species[J].Science,1999,284:334-336.

[24] 苏宏超,沈永平,韩萍,等.新疆降水特征及其对水资源和生态环境的影响[J].冰川冻土,2007,29(3):343-350.[Su Hongchao,Shen Yongping,Han Ping,et al.Precipitation and its impact on water resources and ecological enviroment in Xinjiang region[J].Journal of Glacialogy and Geocryology,2007,29(3):343-350.]

[25] 李学禹,马淼,崔大方,等.新疆植物物种多样性的特点分析[J].石河子大学学报:自然科学版,1998,2(4):289-303.[Li Xueyu,Ma Miao,Cui Dafang,et al.Analyses on the characteristics of botanical species diversity in Xinjiang[J].Journal of Shihezi University:Natural Science,1998,2(4):289-303.]

[26] Adler P B,Levine J M.Contrasting relationships between precipitation and species richness in space and time[J].Oikos,2007,116:221-232.

[27] Linder H P.Plant diversity and endemism in sub-Saharan tropical Africa[J].Journal of Biogeography,2001,28:169-182.

[28] Richerson P J,Lum K-l.Patterns of plant species diversity in California:Relation to weather and topography[J].The American Naturalist,1980,116:504-536.

PDF