山东沿海三种海草根际真核生物群落结构及其影响因素

doi:10.11978/2025003

Abstract

Abstract:

Seagrass beds, mangroves, and coral reefs are known as the three typical offshore marine ecosystems on Earth. Seagrass beds, which possess extremely high ecological service functions, are hailed as the “lungs of the ocean”. Seagrasses have a relatively high level of primary productivity and play a core role in maintaining the balance and stability of the marine ecosystem. Rhizosphere eukaryotes are crucial for seagrass growth and development, playing a significant role in sustaining seagrass health and facilitating the cycling of nutrients such as carbon and nitrogen within the ecosystem. In this study, high-throughput sequencing technology was employed to investigate the community structure and diversity of eukaryotes in the rhizosphere of Ruppia sinensis, Zostera marina, and Zostera japonica along the coastal areas of Shandong Province. The results showed that seagrass-associated eukaryotes were mainly composed of algae, metazoans, and protozoans, with Chlorophyta and Annelida being the dominant groups. The community structure of eukaryotes in the seagrass rhizosphere was significantly correlated with the total carbon content, nitrite content, ammonium content, and sediment particle size. Co-occurrence network analysis further revealed that the interactions among eukaryotes in Zostera japonica were more complex. This study elucidates the community structure and influencing factors of eukaryotes in the seagrass rhizosphere, laying a theoretical foundation for further exploration of nutrient cycling and energy flow in seagrass ecosystems.

Key words: Ruppia sinensis, Zostera marina, Zostera japonica, eukaryotes, community structure, environmental factors

CLC Number:

P735.121

YU Zhen, GUO Xiangrui, LIU Xuerui, SUN Hao, ZHANG Yanying. Community structure of rhizosphere eukaryotic microorganisms and its influencing factors of three seagrass species along the coast of Shandong Province[J].Journal of Tropical Oceanography, 2025, 44(5): 86-96.

Figures/Tables 7

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多样性指数	中国川蔓草	鳗草	日本鳗草	P
Ace指数	243.50±93.61	321.50±196.5	321.80±138.10	0.7351
Chao指数	235.10±92.07	319.90±191.90	316.90±138.30	0.7351
香农指数	2.92±0.8002	3.07±1.18	2.15±1.31	0.5950
辛普森指数	0.13±0.11	0.21±0.19	0.41±0.31	0.1988

Community structure of rhizosphere eukaryotic microorganisms and its influencing factors of three seagrass species along the coast of Shandong Province

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