Individual and population indicators of Zostera japonica respond quickly to experimental addition of sediment-nutrient and organic matter

Han, Qiuying; Soissons, Laura M.; Chen, Lingxin; Katwijk, M.M. van; Bouma, Tjeerd J.

doi:10.1016/j.marpolbul.2016.08.084

Cited by 16 publications

(2 citation statements)

References 86 publications

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“…Therefore, we could postulate that the environment they were both sharing and developing in was not a source of stress that may override our experimental design. Organic carbon content in the sediment was previously measured at 0.66 ± 0.19% (Han et al 2017). Water temperatures oscillate between 18 and 21 °C in summer with a salinity of 31.45 ± 0.03‰.…”

Section: Study Sitementioning

confidence: 99%

Ecosystem engineering creates a new path to resilience in plants with contrasting growth strategies

Soissons

Katwijk

et al. 2019

Oecologia

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Plant species can be characterized by different growth strategies related to their inherent growth and recovery rates, which shape their responses to stress and disturbance. Ecosystem engineering, however, offers an alternative way to cope with stress: modifying the environment may reduce stress levels. Using an experimental study on two seagrass species with contrasting traits, the slow-growing Zostera marina vs. the fast-growing Zostera japonica, we explored how growth strategies versus ecosystem engineering may affect their resistance to stress (i.e. addition of organic material) and recovery from disturbance (i.e. removal of above-ground biomass). Ecosystem engineering was assessed by measuring sulphide levels in the sediment porewater, as seagrass plants can keep sulphide levels low by aerating the rhizosphere. Consistent with predictions, we observed that the fast-growing species had a high capacity to recover from disturbance. It was also more resistant to stress and still able to maintain high standing stock with increasing stress levels because of its ecosystem engineering capacity. The slow-growing species was not able to maintain its standing stock under stress, which we ascribe to a weak capacity for ecosystem engineering regarding this particular stress. Overall, our study suggests that the combination of low-cost investment in tissues with ecosystem engineering to alleviate stress creates a new path in the growth trade-off between investment in strong tissues or fast growth. It does so by being both fast in recovery and more resistant. As such low-cost ecosystem engineering may occur in more species, we argue that it should be considered in assessing plant resilience.

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Section: Study Sitementioning

confidence: 99%

Ecosystem engineering creates a new path to resilience in plants with contrasting growth strategies

Soissons

Katwijk

et al. 2019

Oecologia

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“…Their capacity to relieve hypoxic conditions in the rhizosphere was also compromised under a warming scenario. Nevertheless, Acclimation mechanisms such as metabolic adjustment ( Danaraj et al, 2021 ; Zhang et al, 2021 ; Nguyen et al, 2021 ) and changes in morphological and anatomical traits ( Han et al, 2017 ; Artika et al, 2020 ) have been reported and may allow seagrasses to cope with hypoxic and heat stress at moderate levels. Thus, the acclimation potential of tropical seagrass species considering complex environmental and biotic attributes, require further investigation.…”

Section: Discussionmentioning

confidence: 99%

Comparative study on anatomical traits and gas exchange responses due to belowground hypoxic stress and thermal stress in three tropical seagrasses

Soonthornkalump

Saewong

et al. 2022

PeerJ

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Background The ability to maintain sufficient oxygen levels in the belowground tissues and the rhizosphere is crucial for the growth and survival of seagrasses in habitats with highly reduced sediment. Such ability varies depending on plant anatomical features and environmental conditions. Methods In the present study, we compared anatomical structures of roots, rhizomes and leaves of the tropical intertidal seagrasses, Cymodocea rotundata, Thalassia hemprichii and Halophila ovalis, followed by an investigation of their gas exchange both in the belowground and aboveground tissues and photosynthetic electron transport rates (ETR) in response to experimental manipulations of O2 level (normoxia and root hypoxia) and temperature (30 °C and 40 °C). Results We found that C. rotundata and T. hemprichii displayed mostly comparable anatomical structures, whereas H. ovalis displayed various distinctive features, including leaf porosity, number and size of lacunae in roots and rhizomes and structure of radial O2 loss (ROL) barrier. H. ovalis also showed unique responses to root hypoxia and heat stress. Root hypoxia increased O2 release from belowground tissues and overall photosynthetic activity of H. ovalis but did not affect the other two seagrasses. More pronounced warming effects were detected in H. ovalis, measured as lower O2 release in the belowground tissues and overall photosynthetic capacity (O2 release and dissolved inorganic carbon uptake in the light and ETR). High temperature inhibited photosynthesis of C. rotundata and T. hemprichii but did not affect their O2 release in belowground tissues. Our data show that seagrasses inhabiting the same area respond differently to root hypoxia and temperature, possibly due to their differences in anatomical and physiological attributes. Halophila ovalis is highly dependent on photosynthesis and appears to be the most sensitive species with the highest tendency of O2 loss in hypoxic sediment. At the same time, its root oxidation capacity may be compromised under warming scenarios.

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Growth of Zostera japonica in different sediment habitats of the Yellow River estuary in China

Zhang

Wang

Qian

et al. 2021

Environ Sci Pollut Res

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Individual and population indicators of Zostera japonica respond quickly to experimental addition of sediment-nutrient and organic matter

Cited by 16 publications

References 86 publications

Ecosystem engineering creates a new path to resilience in plants with contrasting growth strategies

Ecosystem engineering creates a new path to resilience in plants with contrasting growth strategies

Comparative study on anatomical traits and gas exchange responses due to belowground hypoxic stress and thermal stress in three tropical seagrasses

Growth of Zostera japonica in different sediment habitats of the Yellow River estuary in China

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