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应用生态学报 ›› 2017, Vol. 28 ›› Issue (5): 1498-1506.doi: 10.13287/j.1001-9332.201705.035

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鳗草在荣成天鹅湖不同生境中生长的适应性

郭美玉1, 李文涛1*, 杨晓龙1, 张秀梅1,2, 刘建影1, 李常军1   

  1. 1中国海洋大学海水养殖教育部重点实验室, 山东青岛 266003;
    2青岛海洋科学与技术国家实验室, 海洋渔业科学与食物产出过程功能实验室, 山东青岛 266003
  • 收稿日期:2016-10-11 修回日期:2017-03-03 发布日期:2017-05-18
  • 通讯作者: *E-mail: liwentao@ouc.edu.cn
  • 作者简介:郭美玉, 女, 1990年生, 硕士研究生. 主要从事鳗草生长的适应性及鳗草移植研究. E-mail: myguo1990@163.com
  • 基金资助:
    本文由海洋公益性行业科研专项经费项目(201405010)资助

Growth adaptability of Zostera marina at different habitats of the Swan Lake in Rongcheng, China

GUO Mei-yu1, LI Wen-tao1*, YANG Xiao-long1, ZHANG Xiu-mei1,2, LIU Jian-ying1, LI Chang-jun1   

  1. 1Ministry of Education Key Laboratory of Mariculture, Ocean University of China, Qingdao 266003, Shandong, China;
    2Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, Shandong, China
  • Received:2016-10-11 Revised:2017-03-03 Published:2017-05-18
  • Contact: *E-mail: liwentao@ouc.edu.cn
  • Supported by:
    This work was supported by the National Marine Public Welfare Research Project (201405010)

摘要: 鳗草在北半球温带海域广有分布,受到不同程度的人为干扰和环境胁迫,海草床面积急剧退化.为探讨鳗草对不同环境胁迫的适应性,于2014年11月—2015年10月对荣成天鹅湖草床的潮间带和潮下带的斑块区、鳗草草场边缘和鳗草草场内部4个生境的鳗草形态和繁殖能力进行了研究.结果表明: 叶长、叶宽、节间长度/直径、地上生物量/地下生物量和分枝频率在不同月份和生境间差异显著,其中除了分枝频率最大值出现在草场边缘(88.4%)外,其他各项指标的最大值均出现在草场内部(分别为78.54 cm、7.93 mm、7.03和3.88).地上生物量/地下生物量的可塑性指数在各站位均较高(0.77~0.92),叶宽的可塑性(0.41~0.64)略小.不同生境中单株鳗草佛焰苞数差异不显著,而单位面积的佛焰苞数差异显著,在草场内部偏向于克隆生殖,而在人为干扰较大的斑块区倾向于有性生殖.

关键词: 生殖策略, 形态学参数, 形态适应性, 鳗草

Abstract: Eelgrass (Zostera marina), a seagrass species widely distributed in the coastal regions of northern hemisphere, has suffered with a great decline due to a variety of anthropogenic and environmental stresses. In order to examine the adaptability of eelgrass to different environmental stresses, studies on the morphology and reproductive capacity of eelgrass had been carried out monthly from November 2014 to October 2015 at four different habitats of the Swan Lake, including patch area inintertidal area and subtidal area, eelgrass meadow edge, and eelgrass meadow area. The results showed significant spatio-temporal variations in the morphological parameters and branch frequency of eelgrass shoots at different habitats of the Swan Lake. The highest values of leaf length, leaf width, aboveground/belowground biomass, and internode length/diameter were observed in the meadow area, i.e., 78.54 cm, 7.93 mm, 7.03 and 3.88, respectively, while the highest branch frequency was observed in the meadow edge (88.4%). The plasticity index for aboveground/belowground biomass was higher (ranging from 0.77 to 0.92) at the four habitats, but those for the leaf width was slightly lower (ranging from 0.41 to 0.64). The number of spathes in each shoot showed no significant difference at different habitats, whereas the number of spathes per unit area was significantly different. Clonal reproduction was more dominant in meadow area than in the patch area where human disturbance was high.

Key words: reproductive strategy, morphological parameter, morphology adaptability, Zostera marina