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Analysis of Grassland Vegetation of the Southwest Heilongjiang Steppe (China) Using the Power Law

2005; Wiley; Volume: 47; Issue: 8 Linguagem: Inglês

10.1111/j.1744-7909.2005.00121.x

1744-7909

Mikinori Tsuiki, Yusheng Wang, Yiruhan, Michio Tsutsumi, Masae Shiyomi,

Botany and Plant Ecology Studies

Journal of Integrative Plant BiologyVolume 47, Issue 8 p. 917-926 Analysis of Grassland Vegetation of the Southwest Heilongjiang Steppe (China) Using the Power Law Mikinori TSUIKI, Mikinori TSUIKI Faculty of Agriculture, Iwate University, Morioka 020-8550, Japan;Search for more papers by this authorYu-Sheng WANG, Yu-Sheng WANG National Northeast Agricultural University, Harbin 150030, China;Search for more papers by this author Yiruhan, Yiruhan Environmental Engineering Department, College of Science and Engineering, Jinan University, Guangzhou 510630, China; Faculty of Science, Ibaraki University, Mito 310-8512, JapanSearch for more papers by this authorMichio TSUTSUMI, Michio TSUTSUMI National Institute of Livestock and Grassland Science, Ecology Department, Tochigi 329-2724, Japan; Faculty of Science, Ibaraki University, Mito 310-8512, JapanSearch for more papers by this authorMasae SHIYOMI, Corresponding Author Masae SHIYOMI National Northeast Agricultural University, Harbin 150030, China; Environmental Engineering Department, College of Science and Engineering, Jinan University, Guangzhou 510630, China; Faculty of Science, Ibaraki University, Mito 310-8512, Japan *Author for correspondence. Tel (Fax): +81 29 243 2902; E-mail: 〈shiyomi@mx.ibaraki.ac.jp〉.Search for more papers by this author Mikinori TSUIKI, Mikinori TSUIKI Faculty of Agriculture, Iwate University, Morioka 020-8550, Japan;Search for more papers by this authorYu-Sheng WANG, Yu-Sheng WANG National Northeast Agricultural University, Harbin 150030, China;Search for more papers by this author Yiruhan, Yiruhan Environmental Engineering Department, College of Science and Engineering, Jinan University, Guangzhou 510630, China; Faculty of Science, Ibaraki University, Mito 310-8512, JapanSearch for more papers by this authorMichio TSUTSUMI, Michio TSUTSUMI National Institute of Livestock and Grassland Science, Ecology Department, Tochigi 329-2724, Japan; Faculty of Science, Ibaraki University, Mito 310-8512, JapanSearch for more papers by this authorMasae SHIYOMI, Corresponding Author Masae SHIYOMI National Northeast Agricultural University, Harbin 150030, China; Environmental Engineering Department, College of Science and Engineering, Jinan University, Guangzhou 510630, China; Faculty of Science, Ibaraki University, Mito 310-8512, Japan *Author for correspondence. Tel (Fax): +81 29 243 2902; E-mail: 〈shiyomi@mx.ibaraki.ac.jp〉.Search for more papers by this author First published: 05 August 2005 https://doi.org/10.1111/j.1744-7909.2005.00121.xCitations: 15 Supported by the National Natural Science Foundation of China (39270146 and 39370129) and the Ministry of Education of Japan (08640797). AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Abstract: In 1997, we conducted a vegetation survey in three semi-arid natural grasslands (steppes) with different livestock grazing intensities in Southwest Heilongjiang Province, China. The dominant grassland species was the grass Stipa baicalensis Roshev. Grasslands with light, intermediate, and heavy grazing intensities were located 10, 5, and 2 km from a village, respectively. Villagers use the steppe to raise cattle, horses, sheep, and goats. Each of the three grasslands was surveyed by placing 100 quadrats (50 cm×50 cm) along a 50 m line transect. Each quadrat was divided into four equal areas (25 cm×25 cm; S-quadrats) and all plant species occurring in each of these smaller areas were identified and recorded. These data were summarized into frequency distributions and the percentage of S-quadrats containing a given species and the variance of each species were estimated. The power law was applied to these estimates. The power law was used to evaluate the spatial heterogeneity and frequency of occurrence for each species in the grassland community. The lightly grazed grassland exhibited high spatial heterogeneity (caused by large plant size), the highest species diversity, and a high occurrence of S. baicalensis. In contrast, the heavily grazed grassland exhibited high spatial heterogeneity (caused by patchy populations of small plant size), low species diversity, and a low occurrence of S. baicalensis. We judged that the heavily grazed grassland was overgrazed and exclusion of livestock from the degraded areas is necessary for recovery. (Managing editor: Ya-Qin HAN) Citing Literature Volume47, Issue8August 2005Pages 917-926 RelatedInformation