高寒草地沙化过程植被与土壤特征变化的生态阈值估算

doi:10.13866/j.azr.2020.06.24

Abstract

Abstract: Alpine grassland desertification is an important environmental problem, which have an important impact on grassland forage production and residents’living environment. The current studies on grassland desertification are mostly focused on the changes in vegetation and soil properties during desertification process, with no prior knowledge about which variables are more sensitive and can be used to indicate state transition in the desertification process, and how to quantify the ecological threshold of the desertification process. Using the method of space- for- time, five types of communities were selected to represent the different gradients of alpine grassland desertification to systematically study the changes in plants, soil properties, and microorganisms during the desertification process, and to identify the desertification thresholds. The results showed that plant community cover, above- ground, and underground biomass significantly decreased with the increase in desertification. Soil moisture concentration gradually decreased, and soil bulk density gradually increased with the increase in the extent of desertification. Gravel content was significantly higher in severely desertified grassland community than in other desertified community types. Soil total carbon and nitrogen concentrations in the soil surface (0-10 cm) gradually decreased, and the ratio of carbon to nitrogen was significantly higher in severely desertified community than in other types of grassland community. Abrupt changes in vegetation occurred in lightly to moderately desertified communities. Meanwhile, rapid changes in soil properties and soil microorganisms (desertification threshold) occurred in moderately to severely desertified communities. Such results suggest that the response of plants to desertification could be more sensitive than that of soil sub-systems, and plants could be treated as a more direct indicators of the gradients of grassland desertification. Moreover, mildly to moderately desertified communities could be the key stage of grassland desertification. Thus, it is very important to take the right methods to avoid further desertification of the grassland.

Key words: alpine grassland, desertification gradient, vegetation characteristics, soil properties, soil microorgan? isms, ecological threshold

ZONG Ning, SHI Pei-li, SUN Jian. Estimation of ecological thresholds in plant and soil properties during desertification in an alpine grassland[J].Arid Zone Research, 2020, 37(6): 1580-1589.

References

[1] 国家林业局. 第五次中国荒漠化和沙化状况公报[M]. 北京: 国家林业局, 2015. [State Forestry Administration. The 5th ChinaDesertification and Desertification Communiqué[M]. Beijing: StateForestry Administration, 2015. ] [2] 王辉, 任继周, 袁宏波. 黄河源区高寒草地沙化进程中土壤物理性质的变化(简报)——以玛曲为例[J]. 草业学报, 2007, 16(1):30-33. [Wang Hui, Ren Jizhou, Yuan Hongbo. A study on thechanges of soil physical properties in the desertification process ofsource regions of the Yellow River using Maqu as an example[J].Acta Prataculturae Sinica, 2007, 16(1): 30-33. ] [3] 陈文业, 张瑾, 戚登臣, 等. 黄河首曲-玛曲县高寒草甸沙化动态演变趋势及其驱动因子定量分析[J]. 草业学报, 2013, 22(2):11-21. [Chen Wenye, Zhang Jin, Qi Dengchen, et al. Desertifica⁃tion dynamic change trend and quantitative analysis of driving fac⁃tors of alpine meadow in Maqu County in the First Meander of theYellow River[J]. Acta Prataculturae Sinica, 2013, 22(2): 11-21. ] [4] 金红喜, 何芳兰, 李昌龙, 等. 玛曲沙化高寒草甸植被、土壤理化性质及土壤微生物数量研究[J]. 草业学报, 2015, 24(11): 20-28. [Jin Hongxi, He Fanglan, Li Changlong, et al. Vegetation char⁃acteristics, abundance of soil microbes, and soil physico-chemicalproperties in desertified alpine meadows of Maqu[J]. Acta Prata⁃culturae Sinica, 2015, 24(11): 20-28. ] [5] 李昌龙, 徐先英, 金红喜, 等. 玛曲高寒草甸沙化过程中群落结构与植物多样性[J]. 生态学报, 2014, 34(14): 3953-3961. [LiChanglong, Xu Xianying, Jin Hongxi, et al. Community structuresand plant diversities in the desertification process of Maqu alpinemeadow in Gansu[J]. Acta Ecologica Sinica, 2014, 34(14): 3953-3961. ] [6] 魏兴琥, 李森, 杨萍, 等. 藏北高山嵩草草甸植被和多样性在沙漠化过程中的变化[J]. 中国沙漠, 2007, 27(5): 750-757. [WeiXinghu, Li Sen, Yang Ping, et al. Changes of vegetation and diver⁃sity of alpine Kobresia (Kobresia pygmaea) steppe meadow in de⁃sertification process in northern Tibet Plateau[J]. Journal of DesertResearch, 2007, 27(5): 750-757. ] [7] 韩光中, 屈建军, 俎瑞平. 安多县沙漠化过程中土壤理化性质的演变特征[J]. 土壤通报, 2014, 45(5): 1032-1037. [Han Guang⁃zhong, Qu Jianjun, Zu Ruiping. Evolution characteristics of soilproperties during desertification progress in Amdo County[J]. Chi⁃nese Journal of Soil Science, 2014, 45(5): 1032-1037. ] [8] 蒋双龙, 胡玉福, 蒲琴, 等. 川西北高寒草地沙化过程中土壤氮素变化特征[J]. 生态学报, 2016, 36(15): 4644-4653. [Jiang Sh⁃uanglong, Hu Yufu, Pu Qin, et al. Changes in soil nitrogen charac⁃teristics during grassland desertification in Northwest Sichuan[J].Acta Ecologica Sinica, 2016, 36(15): 4644-4653. ] [9] 迟妍妍, 许开鹏, 张惠远. 浑善达克沙漠化防治区生态安全评价与对策[J]. 干旱区研究, 2015, 32(5): 1024-1031. [Chi Yanyan,Xu Kaipeng, Zhang Huiyuan. Ecological security assessment andcountermeasures of Hunshandake desertification control regions[J]. Arid Zone Research, 2015, 32(5): 1024-1031. ] [10] 曹成有, 朱丽辉, 富瑶, 等. 科尔沁沙质草地沙漠化过程中土壤生物活性的变化[J]. 生态学杂志, 2007, 26(5): 622-627. [CaoChengyou, Zhu Lihui, Fu Yao, et al. Changes of soil biological ac⁃tivity in desertification process of Horqin sandy grassland[J]. Chi⁃nese Journal of Ecology, 2007, 26(5): 622-627. ] [11] 何芳兰, 金红喜, 王锁民, 等. 沙化对玛曲高寒草甸土壤微生物数量及土壤酶活性的影响[J]. 生态学报, 2016, 36(18): 5876-5883. [He Fanglan, Jin Hongxi, Wang Suomin, et al. Effect of de⁃sertification on soil microbial biomass and enzyme activities inMaqu alpine meadow[J]. Acta Ecologica Sinica, 2016, 36(18):5876-5883. ] [12] 舒向阳, 胡玉福, 蒋双龙, 等. 川西北沙化草地植被群落、土壤有机碳及微生物特征[J]. 草业学报, 2016, 25(4): 45-54. [ShuXiangyang, Hu Yufuu, Jiang Shuanglong, et al. Plant communitycharacteristics, soil organic carbon and soil biological propertiesof grassland desertification sites in Northwest Sichuan[J]. ActaPrataculturae Sinica, 2016, 25(4): 45-54. ] [13] 唐杰, 徐青锐, 王立明, 等. 若尔盖高原湿地不同退化阶段的土壤细菌群落多样性[J]. 微生物学通报, 2011, 38(5): 57-66.[Tang Jie, Xu Qingrui, Wang Liming, et al. Soil bacterial communi⁃ty diversity under different stages of degradation in Zoige wetland[J]. Microbiology China, 2011, 38(5): 57-66. ] [14] Cao C, Zhang Y, Cui Z, et al. Soil bacterial community responsesto revegetation of moving sand dune in semi-arid grassland[J]. Ap⁃plied Microbiology and Biotechnology, 2017, 101(15): 6217-6228. [15] Xue L, Ren H, Li S, et al. Soil bacterial community structure andco-occurrence pattern during vegetation restoration in Karst Rockydesertification area[J]. Frontiers in Microbiology, 2017, 8: 2377. [16] 朱义族, 李雅颖, 韩继刚, 等. 水分条件变化对土壤微生物的影响及其响应机制研究进展[J]. 应用生态学报, 2019, 30(12):4323-4332. [Zhu Yizu, Li Yaying, Han Jigang, et al. Effects ofchanges in water status on soil microbes and their response mecha⁃nism: A review[J]. Chinese Journal of Applied Ecology, 2019, 30(12): 4323-4332. ] [17] 李品, 木勒德尔·吐尔汗拜, 田地, 等. 全球森林土壤微生物生物量碳氮磷化学计量的季节动态[J]. 植物生态学报, 2019, 43(6):532-542. [Li Pin, Muledeer Tuerhanbai, Tian Di, et al. Seasonaldynamics of soil microbial biomass carbon, nitrogen and phospho⁃rus stoichiometry across global forest ecosystems[J]. Chinese Jour⁃nal of Plant Ecology, 2019, 43(6): 532-542. ] [18] Muradian R. Ecological thresholds: A survey[J]. Ecological Eco⁃nomics, 2001, 38(1): 7-24. [19] Rial J A, Pielke R A, Beniston M, et al. Nonlinearities, feedbacksand critical thresholds within the Earth􀆳s climate system[J]. Climat⁃ic Change, 2004, 65(1-2): 11-38. [20] Qian S S. Ecological threshold and environmental management: Anote on statistical methods for detecting thresholds[J]. EcologicalIndicators, 2014, 38: 192-197. [21] Qian S S, Cuffney T F. To threshold or not to threshold? That􀆳s thequestion[J]. Ecological Indicators, 2012, 15(1): 1-9. [22] Sasaki T, Okayasu T, Jamsran U, et al. Threshold changes in vege⁃tation along a grazing gradient in Mongolian rangelands[J]. Journalof Ecology, 2008, 96(1): 145-154. [23] Huggett A J. The concept and utility of‘ecological thresholds􀆳 inbiodiversity conservation[J]. Biological Conservation, 2005, 124(3): 301-310. [24] Groffman P, Baron J, Blett T, et al. Ecological thresholds: The keyto successful environmental management or an important conceptwith no practical application?[J]. Ecosystems, 2006, 9(1): 1-13. [25] 王兮之, 李森, 何巧如, 等. 西藏沙漠化土地退化程度动态分析及其评价[J]. 中国水土保持, 2009, 7: 25-28. [Wang Xizhi, LiSen, He Qiaoru, et al. Analysis and evaluation on degree of land⁃side deformation of desertified land degeneration of Tibet[J]. Soiland Water Conservation in China, 2009, 7: 25-28. ] [26] Dong J, Cui X, Wang S, et al. Changes in biomass and quality of al⁃pine steppe in response to N & P fertilization in the Tibetan Pla⁃teau[J]. Plos One, 2016, 11(5): e0156146. [27] 王敏, 周才平, 吴良, 等. 2001—2010年青藏高原干湿格局及其影响因素分析[J]. 气候变化研究进展, 2012, 8(5): 11-17. [WangMin, Zhou Caiping, Wu Liang, et al. Aridity pattern of Tibetan Pla⁃teau and its influential factors in 2001-2010[J]. Progressus Inqui⁃sitiones DE Mutatione Climatis, 2012, 8(5): 11-17. ] [28] Zong N, Shi P. Soil properties rather than plant production strong⁃ly impact soil bacterial community diversity along a desertificationgradient on the Tibetan Plateau[J]. Grassland Science, 2020, 66:197-206. https://doi.ory/10.1111/grs.12269. [29] Dregne H E. Land degradation in the worlds arid zones[C]//Sympo⁃sium on Soil and Water Science: Key to Understanding Our GlobalEnvironment. Cincinnati, Ohio: Soil Science Society of AmericaSpecial Publication, ed. Baker R S. 1994: 53-58. [30] 李森, 杨萍, 高尚玉, 等. 近10年西藏高原土地沙漠化动态变化与发展态势[J]. 地球科学进展, 2004, 19(1): 63-70.[Li Sen,Yang Ping, Gao Shangyu, et al. Dynamic changes and developmen⁃tal trends of the land desertification in Tibetan Plateau over thepast 10 years[J]. Advance in Earth Sciences, 2004, 19(1): 63-70. ] [31] Li X, Rui J, Mao Y, et al. Dynamics of the bacterial communitystructure in the rhizosphere of a maize cultivar[J]. Soil Biology &Biochemistry, 2014, 68: 392-401. [32] Smith A J, Tran C P. A weight-of-evidence approach to define nutri⁃ent criteria protective of aquatic life in large rivers[J]. Journal of theNorth American Benthological Society, 2010, 3(29): 875-891. [33] Toms J D, Lesperance M L. Piecewise regression: A tool for identi⁃fying ecological thresholds[J]. Ecology, 2003, 84(8): 2034-2041. [34] 吴东浩, 于海燕, 吴海燕, 等. 基于大型底栖无脊椎动物确定河流营养盐浓度阈值——以西苕溪上游流域为例[J]. 应用生态学报, 2010, 21(2): 483-488. [Wu Donghao, Yu Haiyan, Wu Hai⁃yan, et al. Estimation of river nutrients thresholds based on ben⁃thic macroinvertebrate assemblages: A case study in the upperreaches of Xitiao Stream in Zhejiang, China[J]. Chinese Journal ofApplied Ecology, 2010, 21(2): 483-488. ] [35] 魏兴琥, 杨萍, 李森, 等. 西藏沙漠化典型分布区沙漠化过程中的生物生产力和物种多样性变化[J]. 中国沙漠, 2005, 25(5):663-667. [Wei Xinghu, Yang Ping, Li Sen, et al. Changes of bioproductivityand species diversity in process of desertification intypical desertified land, Tibet[J]. Journal of Desert Research,2005, 25(5): 663-667. ] [36] 孙姗姗, 刘新平, 魏水莲, 等. 沙地植物幼苗生长对降水和风速变化的响应[J]. 干旱区研究, 2019, 36(4): 870-877. [Sun Shan⁃shan, Liu Xinping, Wei Shuilian, et al. Response of plant seedlinggrowth to the changes in precipitation and wind velocity in Horqinsandy land[J]. Arid Zone Research, 2019, 36(4): 870-877. ] [37] Buckley R. The effect of sparse vegetation on the transport of dunesand by wind[J]. Nature, 1987, 325(6103): 426-428. [38] 丁勇, 牛建明, 杨持. 北方草地退化沙化趋势、成因与可持续发展研究——以内蒙古多伦县为例[J]. 内蒙古大学学报(自然科学版), 2006, 37(5): 580-586. [Ding Yong, Niu Jianming, YangChi. Study on the tendency and formation causes of grassland deg⁃radation, desertification and the sustainable development in North⁃ern China: The case of duolun county, Inner Mongolia[J]. Journalof Inner Mongolia University (Natural Science Edition), 2006, 37(5): 580-586. ] [39] 唐海萍, 陈姣, 薛海丽. 生态阈值: 概念、方法与研究展望[J]. 植物生态学报, 2015, 39(9): 932-940. [Tang Haiping, Chen Jiao,Xue Haili. Ecological thresholds: Concept, methods and researchoutlooks[J]. Chinese Journal of Plant Ecology, 2015, 39(9): 932-940. ]

Estimation of ecological thresholds in plant and soil properties during desertification in an alpine grassland

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