An unintended ecological benefit from human intervention: The enhancement of carbon storage in seagrass meadows
An unintended ecological benefit from human intervention: The enhancement of carbon storage in seagrass meadows
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人类干预带来的意想不到的生态效益：海草草甸碳储存的增强
DOI：
10.1111/1365-2664.13977
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
and T. Kuwae
中科院分区：
文献类型：
--
作者：
Watanabe;K.;and T. Kuwae
人类干预对各种生态系统的不同功能产生了意想不到的后果。水文干预有可能改变沿海近岸生态系统中的植被生境，但对有机碳(Corg)固存的影响知之甚少，有机碳在减缓气候变化中发挥着重要作用。我们通过在泻湖海草草甸上人工打开入口来检验过去人为干预的影响。通过测量沉积物剖面的地质和生物地球化学特征，获得了泻湖环境的历史变化和Corg的积累速率。同位素、元素特征和硅藻组合表明，干预增加了海水交换的持续时间和海草草甸的范围。土壤蓄积率在干预后增加了1.9倍以上，导致最近几年在海草草甸增加了蓄积量。合成与应用。人工开放潮汐入海口可能会带来意想不到的生态效益，例如增加海草草甸的碳固存。可以有意地采取水文干预措施，作为一种潜在的积极干预措施，以封存碳，控制洪水风险，并为河口系统的人们提供其他好处。研究结果表明，盐度条件的改善和矿物质颗粒供应等物理因素对水文干预加强固碳的可行性有影响。我们认为，生物地球化学-物理耦合方法将有助于利益攸关方评估实施水文干预措施的生态和社会风险及其协同效应。
Human interventions have had unintended consequences for the diverse functions of various ecosystems. Hydrological interventions have the potential to alter vegetated habitats in coastal nearshore ecosystems, but little is known about the impacts on organic carbon (Corg) sequestration, which plays an important role in climate change mitigation.We examined the effects of past human interventions through artificial inlet opening in a lagoonal seagrass meadow. The sediment profiles of geological and biogeochemical characteristics were measured to obtain the historical changes in the lagoon environment and Corgaccumulation rates.Isotopic and elemental signatures and diatom assemblages showed that the interventions increased the duration of seawater exchanges and the extent of the seagrass meadow. Corgaccumulation rates increased more than 1.9‐fold after the intervention, resulting in additional Corgstorage in the seagrass meadow during last 64 years.Synthesis and applications. Artificial opening of tidal inlet can potentially provide unintended ecological benefits, such as increased carbon sequestration in seagrass meadows. Hydrological interventions could be undertaken intentionally as a potential active intervention to sequester carbon, as well as control flood risk and provide other benefits to people in estuarine systems. Our results illustrate that physical factors such as improving salinity conditions and mineral particle supply have an impact on the feasibility of hydrological interventions for enhancing carbon sequestration. We propose that biogeochemical–physical coupled approach will help stakeholders to evaluate the ecological and social risks and synergies of implementing hydrological interventions.
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