Effects of Different Prolonged Light Durations on Survival, Growth and Physiology of the Eelgrass Zostera marina

Zhang, Yanhao; Li, Jian-Du; Wu, Zhong-Xun; Yuan, Shun-Jie; Li, Wentao; Zhang, Peidong

doi:10.3389/fenvs.2022.893377

Cited by 4 publications

(3 citation statements)

References 53 publications

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“…The water in the tank was renewed daily at a rate of 30%. The light duration in the system was controlled at 4 hours/day (Zhang et al 2022 b ).…”

Section: Methodsmentioning

confidence: 99%

“…Stock plants producing ramets ( S P ) and stock plants without ramets ( S T ) were sorted into each replicate group. The number of ramets ( P T ), S P , and S T in each replicate group was counted according to Zhang et al (2022 b ).…”

Section: Methodsmentioning

confidence: 99%

“…Light duration, temperature, salinity, carbon sources, and nutrients availability are critical factors that influence the growth and propagation of seagrass (Lee et al 2007;Zhang et al 2020). Zhang et al (2022bZhang et al ( , 2022aZhang et al ( , 2022cZhang et al ( , 2023 investigated the effects of prolonged light duration, reduced salinity, HCO 3 À -concentration adjustments, planting density variations, and sediment fertilization on Z. marina plant propagation. They observed that under optimal environmental conditions after 42 days, the PC reached 0.056-0.064 shoots shoot À1 day À1 , approximately 3.3-3.8 times higher than those in natural conditions (Marbà & Duarte 1998).…”

Section: Introductionmentioning

confidence: 99%

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Propagating eelgrass (Zostera marina) from cuttings in land–sea combination systems: a novel method to improve the sustainability of seagrass restoration

Zhang,

Zhao,

et al. 2024

Restoration Ecology

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The combination of a land‐based system and natural habitat can propagate donor plants from cuttings for use in seagrass restoration projects; however, the appropriate period for land‐based cultivation is unclear. Eelgrass (Zostera marina) cuttings were cultivated under different combinations of land‐based (0, 3, 6, 9, and 12 weeks) and natural habitat cultivation for 12 weeks. We measured survivorship, growth, productivity, leaf pigmentation, and carbohydrate concentration in eelgrass. Return on investment (defined as the number of ramets of Z. marina returned through input cultivation costs in the seagrass cultivation process) analysis suggested that the optimal period of land‐based cultivation for the propagation of Z. marina is 3.1–3.8 weeks. The ramet frequency of Z. marina exposed to a combination of land‐based cultivation (3 weeks) and natural habitat cultivation (9 weeks) was 1.4 times higher than that of plants cultivated in natural habitats for 12 weeks. The promotional effect of the combination of land‐based and natural habitat cultivation on Z. marina mainly depended on the increase in chlorophyll content and the accumulation and synthesis of nonstructural carbohydrates. The soluble sugar content of Z. marina leaves exposed to a combination of land‐based cultivation (3 weeks) and natural habitat cultivation (9 weeks) was 1.5 times higher than that of plants cultivated in natural habitats for 12 weeks. These results indicated that implementation of a controlled plant cultivation system and process to acquire abundant donor plants. This can help provide valuable data for the development of efficient artificial propagation technologies for Z. marina.

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“…The water in the tank was renewed daily at a rate of 30%. The light duration in the system was controlled at 4 hours/day (Zhang et al 2022 b ).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Propagating eelgrass (Zostera marina) from cuttings in land–sea combination systems: a novel method to improve the sustainability of seagrass restoration

Zhang,

Zhao,

et al. 2024

Restoration Ecology

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Remote sensing detection of seagrass distribution in a marine lagoon (Swan Lake), China

Huang¹,

Wang²,

Wang³

et al. 2023

Opt. Express

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Seagrass, a submerged flowering plant, is widely distributed in coastal shallow waters and plays a significant role in maintaining marine biodiversity and carbon cycles. However, the seagrass ecosystem is currently facing degradation, necessitating effective monitoring. Satellite remote sensing observations offer distinct advantages in spatial coverage and temporal frequency. In this study, we focused on a marine lagoon (Swan Lake), located in the Shandong Peninsula of China which is characterized by a large and typical seagrass population. We conducted an analysis of remote sensing reflectance of seagrass and other objectives using a comprehensive Landsat satellite dataset spanning from 2002 to 2022. Subsequently, we constructed Seagrass Index I (SSI-I) and Seagrass Index II (SSI-II), and used them to develop a stepwise model for seagrass detection from Landsat images. Validation was performed using in situ acoustic survey data and visual interpretation, revealing the good performance of our model with an overall accuracy exceeding 0.90 and a kappa coefficient around 0.80. The long-term analysis (2002-2022) of the seagrass distribution area in Swan Lake, generated from Landsat data using our model, indicated that the central area of Swan Lake sustains seagrass for the longest duration. Seagrass in Swan Lake exhibits a regular seasonal variation, including seeding in early spring, growth in spring-summer, maturation in the middle of summer, and shrinkage in autumn. Furthermore, we observed an overall decreasing trend in the seagrass area over the past 20 years, while occasional periods of seagrass restoration were also observed. These findings provide crucial information for seagrass protection, marine blue carbon studies, and related endeavors in Swan Lake. Moreover, our study offers a valuable alternative approach that can be implemented for seagrass monitoring using satellite observations in other coastal regions.

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Assessment of the establishment success of surfgrass Phyllospadix iwatensis from shoots in a leaf trimming method: implications for large-scale restoration

Sun

Luo

Yu³

et al. 2023

Front. Mar. Sci.

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Phyllospadix spp. play a crucial role in the supply of ecosystem services in rocky shores, but they have been rapidly reduced because of natural and anthropogenic causes. Since Phyllospadix spp. are attached to rocks in the surf zone with a strong hydrodynamic condition, their transplanted shoots easily disappear due to the high current velocity, resulting in the failure of transplantation. We described a leaf trimming method for transplanting shoots of surfgrass Phyllospadix iwatensis and evaluated the method’s establishment success for potential use in large-scale restoration projects. A 30-day laboratory experiment was conducted to determine the effect of leaf trimming on shoot survival, growth, and physiology. Successful establishment of new patches from shoots transplanted with the leaf trimming method was assessed through a shoot-transplanting field experiment over 15 months. The survival of P. iwatensis shoots was not significantly affected by the leaf trimming proportion of 10%–60%. The leaf elongation rate and total leaf area of the shoots exposed to 10%–50% leaf trimming reached or exceeded those of the control at the end of the laboratory experiment; however, the growth of the shoots under 60% leaf trimming was significantly lower than those under the control (p < 0.05). The soluble sugar and starch contents of the shoots also displayed a similar trend to the growth, with the lowest values attained at 60% of leaf trimming. The survival rate of shoots exposed to 50% leaf trimming treatment was 70% after 15 months following transplantation, which was 1.23 times higher than that of shoots in the control (p < 0.05). The shoot height in the 50% leaf trimming treatment was 1.02 times higher than that of shoots in the control at the end of the field experiment. There were no significant differences in photosynthetic pigment contents of P. iwatensis shoots between the leaf trimming treatment and the control (p > 0.05). Our study suggested that the leaf trimming method is an efficient restoration technique for the transplantation of P. iwatensis shoots, and is potentially useful in facilitating large-scale restoration projects.

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Effects of Different Prolonged Light Durations on Survival, Growth and Physiology of the Eelgrass Zostera marina

Cited by 4 publications

References 53 publications

Propagating eelgrass (Zostera marina) from cuttings in land–sea combination systems: a novel method to improve the sustainability of seagrass restoration

Propagating eelgrass (Zostera marina) from cuttings in land–sea combination systems: a novel method to improve the sustainability of seagrass restoration

Remote sensing detection of seagrass distribution in a marine lagoon (Swan Lake), China

Assessment of the establishment success of surfgrass Phyllospadix iwatensis from shoots in a leaf trimming method: implications for large-scale restoration

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