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How do multidimensional traits of dominant diatom Aulacoseira respond to abiotic and biotic factors in a river delta system?

文献类型： 外文期刊

作者： Hu, Caiqin 1 ; Guo, Kun 2 ; Wu, Naicheng 3 ; Liu, Qingfu 4 ; Liu, Qianfu 1 ; Yang, Wanling 1 ; Wang, Chao 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangzhou 510380, Guangdong, Peoples R China

2.East China Normal Univ, Res Ctr Global Change & Complex Ecosyst, Sch Ecol & Environm Sci, Zhejiang Tiantong Forest Ecosyst Natl Observat & R, Shanghai 200241, Peoples R China

3.Ningbo Univ, Dept Geog & Spatial Informat Tech, Ningbo 315211, Peoples R China

4.Guizhou Univ, Forestry Coll, Res Ctr Forest Ecol, Guiyang 550025, Peoples R China

5.Minist Agr & Rural Affairs, Fishery Ecol Environm Monitoring Ctr Pearl River B, Guangzhou 510380, Peoples R China

6.Guangdong Prov Key Lab Aquat Anim Immunol & Sustai, Guangzhou 510380, Peoples R China

关键词： Individual trait variation; Trait richness; Trait evenness; Trait dispersion; Diatom

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.7； 五年影响因子：8.4 ）

ISSN： 0301-4797

年卷期： 2023 年 327 卷

页码：

收录情况： SCI

摘要： Trait-based approaches are being increasingly applied in ecology, and the influence of individual-level trait variation on communities and species has been demonstrated. However, the responses of individual trait variation to environmental changes remain to be explored. To examine the indicating functions of multidimensional traits, individual-level measurements of the dominant diatom genus Aulacoseira Thwaites in the Pearl River Delta were performed, and corresponding responses of three trait indices (trait richness, trait evenness, and trait dispersion) to abiotic and biotic factors were examined. Our results indicated that the three individual trait diversity indices were regulated by different factors. Trait richness was only significantly affected by abiotic factors (temperature), while trait evenness and trait dispersion were regulated by both abiotic and biotic factors. In addition, the direct influence of abiotic factors was more significant than that of biotic factors, implying that the multidimensional trait variation of Aulacoseira was more responsive to environmental changes than to interspecific interactions. Therefore, the multidimensional trait variation of Aulacoseira could be used as an effective indicator to track environmental changes. Our study elucidated the mechanisms relating individuallevel trait variation to phytoplankton community dynamics; this could improve our ability to forecast changes in ecosystem properties across environmental gradients.

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