黄河三角洲不同单倍型芦苇对稳定及波动水位的表型可塑性响应

doi:10.13292/j.1000-4890.202207.032

生态学杂志 ›› 2022, Vol. 41 ›› Issue (7): 1283-1289.doi: 10.13292/j.1000-4890.202207.032

• 黄河流域生态保护与修复专栏 • 上一篇下一篇

黄河三角洲不同单倍型芦苇对稳定及波动水位的表型可塑性响应

宋慧佳^1,2,郭霄^3*,董乾²,刘海明¹,郭卫华^2*

（¹北京自然博物馆，北京 100050； ²山东大学生命科学学院，自然资源部渤海生态预警与保护修复重点实验室，山东青岛 266237； ³青岛农业大学园林与林学院，山东青岛 266109）

出版日期:2022-07-10 发布日期:2022-07-08

Phenotypic plasticity responses of different haplotype Phragmites australis to stable and fluctuating water levels in Yellow River Delta.

SONG Hui-jia^1,2, GUO Xiao^3*, DONG Qian², LIU Hai-ming¹, GUO Wei-hua^2*

(¹BeijingMuseum of Natural History, Beijing 100050, China; ²Key Laboratory of Ecological Prewarning, Protection and Restoration of Bohai Sea, Ministry of Natural Resources, School of Life Sciences, Shandong University, Qingdao 266237, Shandong, China;³College of Landscape Architecture and Forestry, Qingdao Agricultural University, Qingdao 266109, Shandong, China).

Online:2022-07-10 Published:2022-07-08

摘要/Abstract

摘要： 为了解黄河三角洲湿地优势物种芦苇在全球气候变化背景下对水位及其波动的响应，本研究以3种不同单倍型（单倍型O、单倍型P和单倍型M）的芦苇为研究对象，通过3个稳定水位（0、15和30 cm）和2种不同频率的波动水位（5天1次、15天1次）下的温室控制实验，研究了不同芦苇单倍型对稳定和波动水位的形态和生理性状的响应策略，探索不同单倍型芦苇之间的表型可塑性差异。结果表明：（1）高水位下（15、30 cm）芦苇的叶片生物量分别显著下降31.99%和33.54%（P<0.05），芦苇的总生物量、株高、基茎和分蘖数下降。（2）相比于稳定水位和低频率波动，高频率的水位波动显著降低芦苇叶生物量和分蘖数，对总生物量和表型性状都有负面影响，但低频率的水位波动对芦苇表型及生理性状并没有显著的影响。（3）不同单倍型芦苇之间均存在显著性差异（P<0.05），单倍型M的株高、生长率、基茎，光合速率，叶片氮磷等性状显著大于单倍型O和单倍型P，并且表型可塑性指数高于单倍型O和P。因此，未来水位升高及频繁淹水不利于芦苇湿地种群的生存和扩散，同时应警惕芦苇单倍型M的扩散。本研究可为湿地修复中植被的保护及入侵防护提供重要理论参考。

关键词: 水位, 波动频率, 黄河三角洲, 单倍型, 表型可塑性

Abstract: We conducted a greenhouse experiment to examine the responses of dominant species, Phragmites australis, in the Yellow River Delta to water level and its fluctuation under global climate change. Three different haplotypes (haplotype O, haplotype P and haplotype M) of P. australis were subjected to three stable water levels (0, 15 and 30 cm) and two frequencies of water level fluctuation (every 5 days and every 15 days). We investigated the response strategies of different P. australis haplotypes with respect to the morphological and physiological traits, and explored the differences in phenotypic plasticity among different P. australis haplotypes. The results showed that: (1) Leaf biomass of P. australis at high water level (15 and 30 cm) decreased significantly by 31.99% and 33.54%, respectively (P<0.05), while total biomass, plant height, basal stem and number of tillers decreased, compared with those under the low water level treatment. (2) Compared with stable water level and low-frequency fluctuation, highfrequency fluctuation significantly reduced leaf biomass, number of tillers, total biomass, and other phenotypic traits. Morphological and physiological traits were not significantly affected by the frequency of water level fluctuation. (3) There were significant differences among different haplotypes of reed (P<0.05). Plant height, growth rate, basal stem, photosynthetic rate, leaf nitrogen and phosphorus concentrations, as well as phenotypic plasticity index of haplotype M were significantly greater than those of haplotype O and haplotype P. Therefore, rising water level and frequent flooding in the future will not benefit the survival and spread of P. australis populations, but attentions should be paid on the spread of haplotype M. This study can provide important theoretical references for vegetation protection and the control of biological invasion in wetlands.

Key words: water level, fluctuation frequency, Yellow River Delta, haplotype, phenotypic plasticity.

宋慧佳, 郭霄, 董乾, 刘海明, 郭卫华. 黄河三角洲不同单倍型芦苇对稳定及波动水位的表型可塑性响应[J]. 生态学杂志, 2022, 41(7): 1283-1289.

SONG Hui-jia, GUO Xiao, DONG Qian, LIU Hai-ming, GUO Wei-hua. Phenotypic plasticity responses of different haplotype Phragmites australis to stable and fluctuating water levels in Yellow River Delta.[J]. Chinese Journal of Ecology, 2022, 41(7): 1283-1289.

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黄河三角洲不同单倍型芦苇对稳定及波动水位的表型可塑性响应

Phenotypic plasticity responses of different haplotype Phragmites australis to stable and fluctuating water levels in Yellow River Delta.

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