植物生态学报 ›› 2019, Vol. 43 ›› Issue (9): 817-824.doi: 10.17521/cjpe.2018.0186

• 研究论文 • 上一篇    下一篇

山东省滨海湿地柽柳种群的空间分布格局及其关联性

吴盼,彭希强,杨树仁,高亚男,白丰桦,衣世杰,杜宁(),郭卫华()   

  1. 山东大学生命科学学院生态学与生物多样性研究所, 山东青岛 266237
  • 收稿日期:2018-07-31 接受日期:2019-01-13 出版日期:2019-09-20 发布日期:2020-01-03
  • 通讯作者: 杜宁,郭卫华 E-mail:ndu@sdu.edu.cn;whguo_sdu@163.com
  • 基金资助:
    国家科技基础性工作专项(2011FY110300);国家自然科学基金(31470402);国家自然科学基金(31770361)

Spatial distribution patterns and correlation of Tamarix chinensis population in coastal wetlands of Shandong, China

WU Pan,PENG Xi-Qiang,YANG Shu-Ren,GAO Ya-Nan,BAI Feng-Hua,YI Shi-Jie,DU Ning(),GUO Wei-Hua()   

  1. Institute of Ecology and Biodiversity, School of Life Sciences, Shandong University, Qingdao, Shandong 266237, China
  • Received:2018-07-31 Accepted:2019-01-13 Online:2019-09-20 Published:2020-01-03
  • Contact: DU Ning,GUO Wei-Hua E-mail:ndu@sdu.edu.cn;whguo_sdu@163.com
  • Supported by:
    Supported by the National Basic Work of Science and Technology of China(2011FY110300);and the National Natural Science Foundation of China(31470402);and the National Natural Science Foundation of China(31770361)

摘要:

柽柳(Tamarix chinensis)是暖温带滨海盐碱湿地的先锋灌木物种, 在滨海湿地植物群落演替和防止沿海地区海水入侵中发挥着重要的作用。研究柽柳种群的空间分布格局和不同径级柽柳个体之间的空间关联性, 揭示种群发展规律, 可以为盐碱地柽柳种群的保护提供指导, 并为滨海湿地生态系统的演替和生态管理提供依据。该研究在昌邑国家海洋生态特别保护区核心区内沿平行海岸线方向设置两条间隔800 m左右的样带, 每条样带上设置3个50 m × 50 m的样地, 共设置6块样地进行每木调查, 绘制柽柳种群空间位置分布图, 并将调查的柽柳按照其基径大小分为≤4 cm、4-8 cm、>8 cm 3个不同径级。利用Programita软件对柽柳种群的分布格局以及不同径级间的空间关联性进行分析。结果显示: (1) 6块样地共调查柽柳个体374株; (2)不同样地间柽柳植株密度差别较大, 说明柽柳在区域尺度上的分布并不均匀; (3)柽柳种群在小尺度(小于5 m)上表现为聚集分布, 在大尺度(大于15 m)上表现为随机分布, 总体表现为随空间尺度的增大柽柳种群呈现由聚集分布过渡到随机分布的趋势; (4) 3个径级两两之间在小尺度上表现为正关联, 在大尺度上表现为无关联, 但在15 m尺度上径级II与径级III因为竞争而呈空间负相关关系。

关键词: 柽柳种群, 分布格局, 空间尺度, 径级结构, 空间关联性

Abstract:
Aims Tamarix chinensis is a pioneering shrub species in temperate coastal saline wetlands, which plays an important role in plant community succession and preventing seawater intrusion in coastal wetlands. This study, which is focused on Tamarix chinensis population distribution characteristics and the correlations between Tamarix chinensis population distribution with individual diameters, can reveal the characteristics of population development and provide reference for species conservation and management of protected areas. This study may also provide basic information for scientific research on the succession and ecological management of coastal wetland vegetation ecosystems.
Methods In the core area of Changyi National Marine Ecological Special Protection Zone, two sample tapes with a spacing of about 800 m are arranged along the parallel coastline. Each sample tape has three plots of 50 m × 50 m. A total of six sample plots are set up for each wood survey. The spatial distribution map of Tamarix chinensis population is drawn by Origin. The obtained data is divided into three different diameter grades according to their base diameter: diameter grade I (base diameter ≤ 4 cm) and diameter grade II (4 < base diameter ≤ 8 cm), diameter grade III (base diameter > 8 cm). The distribution pattern of Tamarix chinensis population and the relationship between different diameter grades are analyzed by the point pattern analysis method and Programita software.
Important findings (1) A total of 374 individuals of Tamarix chinensis are investigated in six plots, including 14 in plot 1, 20 in plot 2, 36 in plot 3, 45 in plot 4, 221 in plot 5, and 38 in plot 6. (2) There is a large difference in population density of Tamarix chinensis between different plots, which indicates that Tamarix chinensis is not evenly distributed on the regional scale. (3) Tamarix chinensis populations show a clustered distribution on small scale (less than 5 m) while they appear as random distribution on large scale (greater than 15 m). The population of Tamarix chinensis exhibits a trend of transition from clustered distribution to random distribution with the increase of spatial scale. (4) The spatial association of Tamarix chinensis between any two diameter grades is positive on small scale and there is no significant spatial association between them on large scale. However, negative spatial association on diameter grade II and diameter grade III is detected at the scale of 15 m probably due to space competition.

Key words: Tamarix chinensis population, distribution pattern, spatial scale, diameter structure, spatial association