Effects of different water velocities on survival, growth and physiology of the <i>Zostera marina</i> transplants

Jiang Jingjing; Zhang Yanhao; Long Qinggang; Chi Huikai; Zhang Peidong

doi:10.12284/hyxb2025038

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Jiang Jingjing，Zhang Yanhao，Long Qinggang, et al. Effects of different water velocities on survival, growth and physiology of the Zostera marina transplants[J]. Haiyang Xuebao，2025, 47(3)：1–11 doi: 10.12284/hyxb2025038

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Jiang Jingjing，Zhang Yanhao，Long Qinggang, et al. Effects of different water velocities on survival, growth and physiology of the Zostera marina transplants[J]. Haiyang Xuebao，2025, 47(3)：1–11 doi: 10.12284/hyxb2025038

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Effects of different water velocities on survival, growth and physiology of the Zostera marina transplants

doi: 10.12284/hyxb2025038

Jiang Jingjing^{1, 2
,},
Zhang Yanhao^{1, 2},
Long Qinggang³,
Chi Huikai¹,
Zhang Peidong^{1, 2
,
,}

1.
Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
2.
Observation and Research Station of Yellow-Bohai Sea Temperate Seagrass Bed Ecosystem, Ministry of Natural Resources, Qingdao 266100, China
3.
China Environmental Protection Foundation, Beijing, 100062, China

Available Online: 2025-02-11

Abstract

Abstract

To investigate the survival, growth, and physiological responses of Zostera marina transplants to different water velocities and determine the optimal flow velocity range, an experiment was conducted. The study aimed to elucidate the effects of water velocity on Z. marina transplants by measuring and evaluating their survival rates, growth performance, and physiological indicators, as well as examining the interrelationships among these factors. Results indicated that the survival rate of transplanted Z. marina plants peaked at 0.4 m/s, being 1.1−2.4 times higher than those in the other treatments (P<0.05). Notably, all plants in the control group perished. Aboveground tissue growth decreased progressively with increasing water velocity, while belowground tissue growth increased gradually. Specifically, leaf elongation rate at 1 m/s was 24.0% lower compared to 0.2 m/s, whereas belowground dry weight at 0.4 m/s was 1.6 times higher than that at 0.2 m/s. Photosynthetic pigment and nonstructural carbohydrates contents in leaves reached their lowest levels between 0.4 and 0.6 m/s, decreasing by 0.8% to 18.5% relative to other treatments. Considering the survival and growth comprehensive income index and physiological index stability coefficient, the suitable flow velocity range for Z. marina transplants is 0.3 to 0.8 m/s, with an optimal range of 0.4 to 0.6 m/s. These findings suggest that moderately increasing water flow velocity can facilitate the rapid establishment and expansion of Z. marina transplants.
- Zostera marina,
- water velocity range,
- survival rate,
- growth rate,
- photosynthetic pigment,
- non-structural carbohydrates

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References(65)

References

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