Determination of species-area relationships and minimum sampling area for the shrub communities in the arid valley in the upper reach of the Minjiang River, China |
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| Authors: | Chen Hong Li Yanqiong Zheng Shaowei Wang Ling He Fei Liu Jun and Mu Changlong |
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| Institution: | 1. Sichuan Academy of Forestry, Chendu 610081, China;2. Sichuan Agricultural University, Ya''an 625014, China;1. Laboratorio de Biología de la Conservación, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, Ciudad Universitaria, San Nicolás de los Garza, 66451 Nuevo León, México;2. Especies, Sociedad y Hábitat, A. C., Valle Esmeralda 511 A, Col. Mirador de la Silla, Guadalupe, 67170 Nuevo León, México;3. Laboratorio de Ecología Molecular, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, Ciudad Universitaria, San Nicolás de los Garza, 66451 Nuevo León, México;1. MTA-DE Biodiversity and Ecosystem Services Research Group, P.O. Box 71, H-4010 Debrecen, Hungary;2. University of Debrecen, Department of Ecology, P.O. Box 71, H-4010 Debrecen, Hungary;1. National Oceanography Centre, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, United Kingdom;2. Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, United Kingdom;3. Life Sciences Department, Natural History Museum, London SW7 5BD, United Kingdom;1. Centre d’ étude de la forêt, Département des sciences du bois et de la forêt, Pavillon Abitibi-Price, 2405 rue de la Terrasse, Université Laval, Québec, QC G1V 0A6, Canada;2. Institute of Physico-Chemical and Biological Problems in Soil Science, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russia;3. Sukachev Institute of Forest, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk 660036, Russia |
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| Abstract: | The minimum sampling areas (MSAs) for the shrub communities in the arid valley in the upper reach of the Minjiang River, China, were studied by fitting community species-area relationships using 3 types of equations. The MSAs were determined at the proportional factor (ρ) 0.6, 0.7, 0.8 and 0.9. The proportional factors represent the proportion of the number of species within a sampling plot in the total number of species. The MSAs of the shrub communities at different elevations and on different slope faces for ρ = 0.6, 0.7 and 0.8 were all around 100 m2. Hence, the MSAs could be set to be 100 m2 (10 m × 10 m) at 60%–80% precision levels. For ρ = 0.9, that is, for a 90% precision level, the MSAs were less than 200 m2 (10 m × 20 m). The MSAs and species richness increased gradually with the rising elevation. At the elevation below 2000 m, the MSAs and species richness on the north-facing slope were larger than those on the south-facing slope. However, at the elevation around 2200 m, there was no difference amongst different facing slopes. For the shrub communities in the arid valley in the upper reach of the Minjiang River, the species-area curves by fitting the first two equations are better than that by fitting the third equation. |
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| Keywords: | shrub community minimum sampling area species-area relationship elevation slope face arid valley the upper reach of the Minjiang River |
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