三江平原沼泽湿地4种优势植物空间格局对不同水位环境的响应

doi:10.17520/biods.2021392

生物多样性 ›› 2022, Vol. 30 ›› Issue (3): 21392. DOI: 10.17520/biods.2021392

• 研究报告: 植物多样性 • 上一篇下一篇

三江平原沼泽湿地4种优势植物空间格局对不同水位环境的响应

付裕¹, 黄康祥¹, 蔡锦枫¹, 陈慧敏¹, 任久生²^,^*(), 万松泽¹, 张扬¹, 任珩³, 毛瑢¹, 石福习¹^,⁴^,^*()

1.江西农业大学林学院鄱阳湖流域森林生态系统保护与修复国家林业与草原局重点实验室, 南昌 330045
2.东华理工大学江西省大气污染成因与控制重点实验室, 南昌 330013
3.中国科学院西北生态环境资源研究院中国生态系统研究网络临泽内陆河流域研究站, 兰州 730000
4.中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室, 长春 130102

收稿日期:2021-09-27 接受日期:2021-12-27 出版日期:2022-03-20 发布日期:2022-02-08
通讯作者: 任久生,石福习
作者简介:shifuxi2008@163.com
*E-mail: renjiusheng@126.com;
基金资助:
国家自然科学基金(42067049);国家自然科学基金(32160357);国家自然科学基金(41907407);江西省自然科学基金(20202BABL213035);江西省教育厅科学技术研究项目(GJJ190209)

Responses in spatial pattern of four dominant species to different water level environments in a freshwater marsh in the Sanjiang Plain

Yu Fu¹, Kangxiang Huang¹, Jinfeng Cai¹, Huimin Chen¹, Jiusheng Ren²^,^*(), Songze Wan¹, Yang Zhang¹, Heng Ren³, Rong Mao¹, Fuxi Shi¹^,⁴^,^*()

1 Key Laboratory of State Forestry and Grassland Administration on Forest Ecosystem Protection and Restoration of Poyang Lake Watershed, College of Forestry, Jiangxi Agricultural University, Nanchang 330045
2 Jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution, School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang 330013
3 Linze Inland River Basin Research Station, Chinese Ecosystem Research Network, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000
4 Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102

Received:2021-09-27 Accepted:2021-12-27 Online:2022-03-20 Published:2022-02-08
Contact: Jiusheng Ren,Fuxi Shi

1. 附录1 使用泊松聚块模型和嵌套双聚块模型的单变量分析结果.pdf(125KB)

摘要/Abstract

摘要：

水文过程是沼泽湿地最基本的生态过程, 理解物种空间格局形成机制及其种群特征随水位环境变化的规律对于科学指导沼泽湿地植被恢复具有重要意义。本研究分别选择三江平原季节性积水与常年积水沼泽, 应用点格局方法中的完全空间随机模型、泊松聚块模型和嵌套双聚块模型分析了毛薹草(Carex lasiocarpa)、漂筏薹草(C. pseudocuraica)、狭叶甜茅(Glyceria spiculosa)、小叶章(Deyeuxia angustifolia) 4个主要优势植物种群的空间格局, 并测定了不同水位环境条件下的种群密度和个体大小特征。结果表明: 在沼泽湿地中, 4个优势种群在0-200 cm的尺度范围内都偏离了完全随机模型, 表现为集体性聚集分布特征, 且聚集距离主要集中在0-50 cm之间。随着水位的升高, 毛薹草种群密度、个体生物量、株高和基径都呈显著增大趋势, 但其聚集强度变弱; 而小叶章种群密度和个体大小则显著降低, 其聚集强度增大; 漂筏薹草和狭叶甜茅种群密度、个体大小和聚集强度变化并不显著。在季节性积水区, 4个物种在小尺度上均偏离了泊松聚块模型, 符合嵌套双聚块模型, 即在大聚块中分布较高密度的小聚块。但是, 在常年积水区, 仅毛薹草、漂筏薹草和狭叶甜茅3个物种符合嵌套双聚块模型, 而小叶章种群则符合泊松聚块模型, 说明在高水位胁迫下小叶章种群空间格局的大聚块中不存在较高密度的小聚块。综上所述,水位环境胁迫主要通过影响繁殖分配、种内竞争、易化作用以及个体大小变异等生物学过程共同决定着三江平原淡水沼泽湿地植物种群的斑块化分布特征, 不同零模型可以帮助解释种群空间分布格局的形成机制。

关键词: 点格局, 零模型, 个体大小, 沼泽湿地, 三江平原

Abstract

Aims: Instability of hydrological regimes is one of the most basic ecological processes in wetlands. Our objective is to determine how changing water level environments impacts the spatial patterns of marsh plants in the freshwater wetlands in the Sanjiang Plain, Northeast China.

Methods:We analyzed the spatial distribution patterns of populations for four dominant species (Carex lasiocarpa, C. pseudocuraica, Glyceria spiculosa, Deyeuxia angustifolia) in the seasonal inundated (SI) marsh and perennial inundated (PI) marsh in the Ecological Experiment Station of Mire Wetland in the Sanjiang Plain. We utilized a small-scale point pattern analysis based on three null models, including: complete spatial randomness process (CSR), Poisson cluster process (Neyman-Scott process, NS), and nested double-cluster process (DC). We then tested the population density and individual size characteristics of each species.

Results: Regardless of water level conditions, the four main dominant species were completely diverged from the CSR model, and the aggregation distance was primarily focused on 0-50 cm scale. These results indicate that there is a stronger aggregation in small scales for these marsh plants species, but the aggregated intensity was expressed in differences among water level environments. With the rising water level, the population density, individual aboveground biomass, plant height, and stem base diameter of C. lasiocarpa exhibited a significantly increasing trend, but its aggregated intensity became weaker. By contrast, these individual size parameters of D. angustifolia exhibited a dramatically decreasing trend, whereas its aggregated intensity increases. In addition, the changes in individual sizes and aggregated intensity of the other two species (i.e., C. pseudocuraica and G. spiculosa) were not significant. In seasonal inundated (SI) marsh, the four main dominant species were diverged from the NS model in small-scales, but their spatial distributions fit better with the DC model at 0-200 cm scale, indicating that there is a series of clustered patterns under slight flood stress. In the perennial inundated (PI) marsh, the spatial patterns of three species (i.e., C. lasiocarpa, C. pseudocuraica and G. spiculosa) also fit better with the DC model at 0-200 cm scale. However, the spatial patterns of D. angustifolia fit well with the NS model, implying the small-scale clustering disappeared with the intensification of flooding stress.

Conclusion: Hydrologic regimes may determine the patch patterns of marsh plants in the Sanjiang Plain, primarily via variations in reproductive allocation, intraspecific competitions, facilitation effect and individual sizes. The application of the various null models could help explain the formation mechanisms of the population spatial distribution patterns more efficiently.

Key words: point pattern, null models, individual sizes, marsh, Sanjiang Plain

付裕, 黄康祥, 蔡锦枫, 陈慧敏, 任久生, 万松泽, 张扬, 任珩, 毛瑢, 石福习 (2022) 三江平原沼泽湿地4种优势植物空间格局对不同水位环境的响应. 生物多样性, 30, 21392. DOI: 10.17520/biods.2021392.

Yu Fu, Kangxiang Huang, Jinfeng Cai, Huimin Chen, Jiusheng Ren, Songze Wan, Yang Zhang, Heng Ren, Rong Mao, Fuxi Shi (2022) Responses in spatial pattern of four dominant species to different water level environments in a freshwater marsh in the Sanjiang Plain. Biodiversity Science, 30, 21392. DOI: 10.17520/biods.2021392.

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链接本文: https://www.biodiversity-science.net/CN/10.17520/biods.2021392

https://www.biodiversity-science.net/CN/Y2022/V30/I3/21392

图/表 4

图1 三江平原4个优势物种在季节性积水沼泽(a-d)和常年积水沼泽(e-h)的个体分布点位图

Fig. 1 Individual distribution locus map of four dominant species in seasonal inundated marsh (a-d) and perennial inundated marsh (e-h) in the Sanjiang Plain

图2 三江平原季节性积水沼泽(SI)和常年积水沼泽(PI) 4个优势物种的单株生物量、植株高度和基径变化。NS: P > 0.05; * P < 0.05; ** P < 0.01; *** P < 0.001。

Fig. 2 Variations in individual aboveground biomass, plant height and stem base diameter of four dominant species in seasonal inundated (SI) marsh and perennial inundated (PI) marsh in the Sanjiang Plain. NS, P > 0.05; * P < 0.05; ** P < 0.01; *** P < 0.001.

图3 4个优势物种在季节性积水环境中基于完全空间随机模型(CSR)、泊松聚块模型(NS)和嵌套双聚块模型(DC)的点格局分析

Fig. 3 Point pattern analysis of four dominant species based on complete spatial randomness (CSR), Poisson cluster process (NS) and nested double-cluster process (DC) in seasonal inundated (SI) marsh

图4 4个优势物种在常年积水环境中基于完全空间随机模型(CSR)、泊松聚块模型(NS)和嵌套双聚块模型(DC)的点格局分析

Fig. 4 Point pattern analysis of four dominant species based on complete spatial randomness (CSR), Poisson cluster process (NS) and nested double-cluster process (DC) in perennial inundated (PI) marsh

参考文献 38

[1]	Bai JS, Tang HR, Chen FY, Lou YJ (2021) Functional traits response to flooding depth and nitrogen supply in the helophyte Glyceria spiculosa (Gramineae). Aquatic Botany, 175, 103449. DOI URL
[2]	Bertness MD, Callaway R (1994) Positive interactions in communities. Trends in Ecology & Evolution, 9, 191-193. DOI URL
[3]	Besag JE (1977) Contribution to the discussion of Dr. Ripley’s paper. Journal of the Royal Statistical Society B: Statistical Methodology, 39, 193-195.
[4]	Callaway RM, Walker LR (1997) Competition and facilitation: A synthetic approach to interactions in plant communities. Ecology, 78, 1958-1965. DOI URL
[5]	Colmer TD (2003) Long-distance transport of gases in plants: A perspective on internal aeration and radial oxygen loss from roots. Plant, Cell & Environment, 26, 17-36.
[6]	Condit R, Ashton PS, Baker P, Bunyavejchewin S, Gunatilleke S, Gunatilleke N, Hubbell SP, Foster RB, Itoh A, LaFrankie JV, Lee HS, Losos E, Manokaran N, Sukumar R, Yamakura T (2000) Spatial patterns in the distribution of tropical tree species. Science, 288, 1414-1418. DOI PMID
[7]	Diggle PJ (2003) Statistical Analysis of Spatial Point Patterns. Arnold Press, London.
[8]	Dong HP, Cao HJ, Xie LH, Huang QY, Yang LB, Ni HW, Wang JF (2022) Effect of water level difference in heterogeneous habitats on sexual reproductive allocation of Deyeuxia angustifolia. Chinese Journal of Applied Ecology, 33, 378-384. (in Chinese with English abstract)
	[ 董海鹏, 曹宏杰, 谢立红, 黄庆阳, 杨立宾, 倪红伟, 王继丰 (2022) 异质生境水位差异对小叶章有性繁殖分配的影响. 应用生态学报, 33, 378-384.]
[9]	Gao FY, Shi FX (2015) Small-scale point pattern analysis based on different null models for detecting spatial patterns of dominant species in Sanjiang Plain, China. Acta Ecologica Sinica, 35, 2029-2037. (in Chinese with English abstract)
	[ 高福元, 石福习 (2015) 基于不同零模型的三江平原沼泽湿地主要物种小尺度点格局分析. 生态学报, 35, 2029-2037.]
[10]	Hao HM, Lu R, Jia C, Liu Y, Wu GL (2017) Structure and dynamic characteristics of shrub patch of Artemisia ordosica in the cross areas of wind water erosion. Acta Botanica Boreali-Occidentalia Sinica, 37, 773-781. (in Chinese with English abstract)
	[ 郝红敏, 路荣, 贾超, 刘玉, 武高林 (2017) 水蚀风蚀交错带黑沙蒿灌丛斑块种群结构及动态特征研究. 西北植物学报, 37, 773-781.]
[11]	Huang X, Zhu J, Yao L, Ai XR, Wang J, Wu ML, Zhu Q, Chen SL (2020) Structure and spatial distribution pattern of a native Metasequoia glyptostroboides population in Hubei. Biodiversity Science, 28, 463-473. (in Chinese with English abstract) DOI
	[ 黄小, 朱江, 姚兰, 艾训儒, 王进, 吴漫玲, 朱强, 陈绍林 (2020) 水杉原生种群结构及空间分布格局. 生物多样性, 28, 463-473.] DOI
[12]	Huang YF, Ding Y, Zang RG, Li XC, Zou ZC, Han WT (2012) Spatial pattern of trees in tropical lowland rain forest in Bawangling of Hainan Island, China. Chinese Journal of Plant Ecology, 36, 269-280. (in Chinese with English abstract) DOI URL
	[ 黄运峰, 丁易, 臧润国, 李小成, 邹正冲, 韩文涛 (2012) 海南岛霸王岭热带低地雨林树木的空间格局. 植物生态学报, 36, 269-280.] DOI
[13]	Levine JM, Murrell DJ (2003) The community-level consequences of seed dispersal patterns. Annual Review of Ecology, Evolution, and Systematics, 34, 549-574. DOI URL
[14]	Li YF, Chen L, Li XB, Zhang YF, Su Y (2019) Point pattern analysis of an Artemisia scoparia seedling population under different soil conditions in a desert steppe. Acta Ecologica Sinica, 39, 6273-6281. (in Chinese with English abstract)
	[ 李月飞, 陈林, 李学斌, 张义凡, 苏莹 (2019) 荒漠草原不同土壤条件下猪毛蒿幼苗种群的点格局分析. 生态学报, 39, 6273-6281.]
[15]	Lin YC, Chang LW, Yang KC, Wang HH, Sun IF (2011) Point patterns of tree distribution determined by habitat heterogeneity and dispersal limitation. Oecologia, 165, 175-184. DOI URL
[16]	Loreti E, van Veen H, Perata P (2016) Plant responses to flooding stress. Current Opinion in Plant Biology, 33, 64-71. DOI PMID
[17]	Pennings SC, Grant MB, Bertness MD (2005) Plant zonation in low-latitude salt marshes: Disentangling the roles of flooding, salinity and competition. Journal of Ecology, 93, 159-167. DOI URL
[18]	Perry JN, Liebhold AM, Rosenberg MS, Dungan J, Miriti M, Jakomulska A, Citron-Pousty S (2002) Illustrations and guidelines for selecting statistical methods for quantifying spatial pattern in ecological data. Ecography, 25, 578-600. DOI URL
[19]	R Core Team (2021) R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna.
[20]	Ren H, Shi FX, Mao R, Guo YD, Zhao WZ (2020) Response of individual sizes and spatial patterns of Deyeuxia angustifolia to increasing water level gradient in a freshwater wetland. Environmental Science and Pollution Research, 27, 17085-17092. DOI URL
[21]	Ripley BD (1977) Modelling spatial patterns. Journal of the Royal Statistical Society B: Statistical Methodology, 39, 172-192.
[22]	Shi FX, Song CC, Zhang XH, Mao R, Guo YD, Gao FY (2015) Plant zonation patterns reflected by the differences in plant growth, biomass partitioning and root traits along a water level gradient among four common vascular plants in freshwater marshes of the Sanjiang Plain, Northeast China. Ecological Engineering, 81, 158-164. DOI URL
[23]	Velázquez E, Martínez I, Getzin S, Moloney KA, Wiegand T (2016) An evaluation of the state of spatial point pattern analysis in ecology. Ecography, 39, 1042-1055. DOI URL
[24]	Wang L, Song CC, Hu JM, Liao YJ (2009) Responses of Carex lasiocarpa clonal reproduction to water regimes at different growth stages. Acta Ecologica Sinica, 29, 2231-2238. (in Chinese with English abstract)
	[ 王丽, 宋长春, 胡金明, 廖玉静 (2009) 不同生长阶段毛苔草(Carex lasiocarpa)克隆繁殖对水文情势的响应. 生态学报, 29, 2231-2238.]
[25]	Wang XG, Wiegand T, Hao ZQ, Li BH, Ye J, Lin F (2010) Species associations in an old-growth temperate forest in Northeastern China. Journal of Ecology, 98, 674-686. DOI URL
[26]	Wang XT, Chai J, Jiang C, Tai Y, Chi YY, Zhang WH, Liu F, Li SY (2020) Population spatial pattern of Stipa grandis and its response to long-term overgrazing. Biodiversity Science, 28, 128-134. (in Chinese with English abstract) DOI URL
	[ 王鑫厅, 柴静, 姜超, 邰阳, 迟延艳, 张维华, 刘芳, 李素英 (2020) 典型草原大针茅种群空间格局及对长期过度放牧的响应. 生物多样性, 28, 128-134.] DOI
[27]	Wang XT, Hou YL, Liang CZ, Wang W, Liu F (2012) Point pattern analysis based on different null models for detecting spatial patterns. Biodiversity Science, 20, 151-158. (in Chinese with English abstract) DOI URL
	[ 王鑫厅, 侯亚丽, 梁存柱, 王炜, 刘芳 (2012) 基于不同零模型的点格局分析. 生物多样性, 20, 151-158.] DOI
[28]	Wang XT, Hou YL, Liu F, Chang Y, Wang W, Liang CZ, Miao BL (2011) Point pattern analysis of dominant populations in a degraded community in Leymus chinensis + Stipa grandis steppe in Inner Mongolia, China. Chinese Journal of Plant Ecology, 35, 1281-1289. (in Chinese with English abstract) DOI URL
	[ 王鑫厅, 侯亚丽, 刘芳, 常英, 王炜, 梁存柱, 苗百岭 (2011) 羊草 + 大针茅草原退化群落优势种群空间点格局分析. 植物生态学报, 35, 1281-1289.] DOI
[29]	Watt AS (1947) Pattern and process in the plant community. Journal of Ecology, 35, 1-22. DOI URL
[30]	Wiegand T, Gunatilleke S, Gunatilleke N, Okuda T (2007) Analyzing the spatial structure of a Sri Lankan tree species with multiple scales of clustering. Ecology, 88, 3088-3102. DOI URL
[31]	Wiegand T, Moloney KA (2004) Rings, circles, and null models for point pattern analysis in ecology. Oikos, 104, 209-229. DOI URL
[32]	Xie YH, Ren B, Li F (2009) Increased nutrient supply facilitates acclimation to high-water level in the marsh plant Deyeuxia angustifolia: The response of root morphology. Aquatic Botany, 91, 1-5. DOI URL
[33]	Yang J, Li EH, Cai XB, Wang Z, Wang XL (2014) Research progress in response of plants in wetlands to water level change. Wetland Science, 12, 807-813. (in Chinese with English abstract)
	[ 杨娇, 厉恩华, 蔡晓斌, 王智, 王学雷 (2014) 湿地植物对水位变化的响应研究进展. 湿地科学, 12, 807-813.]
[34]	Yu GL (2011) Effects of waterlogging on intraspecific interactions of the clonal herb Alternanthera philoxeroides. Chinese Journal of Plant Ecology, 35, 973-980. (in Chinese with English abstract) DOI URL
	[ 于国磊 (2011) 水淹对克隆植物空心莲子草种内关系的影响. 植物生态学报, 35, 973-980.] DOI
[35]	Zeng B, Fu TF, Ulrich S, Arnd JK (2006) Different responses of sexual and asexual reproduction of Arundinella hirta to flooding. Frontiers of Biology in China, 1, 46-49. DOI URL
[36]	Zhang XH, Mao R, Gong C, Yang GS, Lu YZ (2014) Effects of hydrology and competition on plant growth in a freshwater marsh of northeast China. Journal of Freshwater Ecology, 29, 117-128. DOI URL
[37]	Zhao CZ, Gao FY, Wang XP, Sheng YP, Shi FX (2010) Fine-scale spatial patterns of Stellera chamaejasme population in degraded alpine grassland in upper reaches of Heihe, China. Chinese Journal of Plant Ecology, 34, 1319-1326. (in Chinese with English abstract)
	[ 赵成章, 高福元, 王小鹏, 盛亚萍, 石福习 (2010) 黑河上游高寒退化草地狼毒种群小尺度点格局分析. 植物生态学报, 34, 1319-1326.] DOI
[38]	Zhao KY (1999) Mires in China. Science Press, Beijing. (in Chinese)
	[ 赵魁义 (1999) 中国沼泽志. 科学出版社, 北京.]

三江平原沼泽湿地4种优势植物空间格局对不同水位环境的响应

Responses in spatial pattern of four dominant species to different water level environments in a freshwater marsh in the Sanjiang Plain

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