Clonal performance of Scirpus yagara in multiple levels of substrate heterogeneity and submergence
文献类型： 外文期刊
作者： Wang, Tong 1 ; Yang, Liyu 2 ; Shao, Runyu 1 ; Hu, Jiangtao 4 ; Liu, Chunhua 4 ; Yu, Dan 4 ;
作者机构： 1.Qingdao Agr Univ, Coll Landscape Architecture & Forestry, Qingdao 266109, Peoples R China
2.Shandong Acad Agr Sci, Shandong Peanut Res Inst, Qingdao 266100, Peoples R China
3.Chinese Acad Agr Sci, Tobacco Res Inst, Key Lab Tobacco Gene Resources, Qingdao 266101, Peoples R China
4.Wuhan Univ, Coll Life Sci, Dept Ecol, Natl Field Stn Liangzi Lake Ecosyst, Wuhan 430072, Peoples R China
关键词： water level; substrate heterogeneity; emergent aquatic plant; clonality; foraging behaviour; Scirpus yagara
期刊名称：JOURNAL OF PLANT ECOLOGY （ 影响因子：1.774； 五年影响因子：2.547 ）
ISSN： 1752-9921
年卷期： 2021 年 14 卷 5 期
页码：
收录情况： SCI
摘要： Aims Environmental heterogeneity affects the performance of clonal aquatic plants. Few researchers integrated two aspects of heterogeneity into the study of clonal plant ecology. The aims of the present study are to (i) test whether different substrate heterogeneity and submergence exert similar effects on plant performance and (ii) explore the foraging behaviour. Methods In this study, Scirpus yagara was subjected to multiple levels of substrate heterogeneity and submergence. Substrate treatments included one homogeneous substrate and three heterogeneous substrates (two-patch, four-patch and eight-patch). Water level treatments included 0, 10 and 30 cm. Traits including ramet number, generation number, leaf number, bulb number, ramet height, culm length, rhizome length, clonal radius, spacer length, spacer thickness, total biomass, biomass of bulbs and biomass per bulb were measured. Important Findings Deeper water levels significantly reduced variables associated with growth such as ramet number, generation number, leaf number and bulb number, while substrate patchiness induced significant variations in traits such as spacer length and spacer thickness. Significant interactive effects of the two factors were found for ramet number, leaf number and spacer length. Scirpus yagara showed colonization towards the lake sediment patch in two-patch and four-patch substrates, and more structures were placed in the lake sediment patch. Especially for the two-patch substrate, all structures occupied the lake sediment patch. Twosided intrusion was observed in the eight-patch substrate, which induced an even allocation of structures in different patches. The foraging behaviour was correlated with the patch size.
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