跨越人为梯度的红树林土壤中的碳和汞埋藏

IF 2.6 3区地球科学 Q1 MARINE & FRESHWATER BIOLOGY

Estuarine Coastal and Shelf Science Pub Date : 2025-03-03 DOI:10.1016/j.ecss.2025.109226

Antoniwal A. Jatobá-Junior , Vanessa Hatje , Pere Masque , Carlos Eduardo de Rezende , Alex Cabral , Yvonne Y.Y. Yau , João Barreira , Gloria M.S. Reithmaier , Isaac R. Santos

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引用次数: 0

摘要

红树林是大气中二氧化碳的重要汇，形成了富含有机物的土壤。然而，不断增加的人为压力可能会影响红树林的碳固存。研究了不同程度人为影响下巴西红树林有机碳（OC）和汞（Hg）的储量和积累速率。有机碳储量和累积速率分别为285±33 Mg C ha−1和128±96 g C m−2 yr−1。OC存量差异不显著(p >；0.05)，在原始和受影响的红树林中有所不同。在潮间带梯度上OC积累速率的高变异性强调了在评估蓝碳时考虑小尺度垂直变异性的重要性。在受影响的红树林中，汞与有机碳的关系强于保存完好的红树林。这项研究有助于减少南美洲OC储量和积累速率的不确定性，并揭示了与汞污染的联系。了解这些动态可以增强我们对蓝碳生态系统在陆地-海洋界面储存碳和过滤污染的潜力的理解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Carbon and mercury burial in mangrove soils across an anthropogenic gradient

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Carbon and mercury burial in mangrove soils across an anthropogenic gradient

Mangrove forests are important sinks for atmospheric CO₂, resulting in organic-rich soils. However, increasing anthropogenic pressures may impact mangrove carbon sequestration. This study investigated organic carbon (OC) and mercury (Hg) stocks and accumulation rates in Brazilian mangroves under different degrees of anthropogenic influences. Organic carbon stocks and accumulation rates were 285 ± 33 Mg C ha⁻¹ and 128 ± 96 g C m⁻² yr⁻¹, respectively. The OC stocks were not significantly (p > 0.05) different in the pristine and impacted mangroves. A high variability in OC accumulation rates across intertidal gradients underscores the importance of considering small-scale vertical variability when assessing blue carbon. The relationship between Hg and OC was stronger in impacted mangroves than the well-preserved sites. This study contributes to minimize uncertainties in South America OC stocks and accumulation rates and reveals links to Hg contamination. Understanding these dynamics enhances our comprehension of blue carbon ecosystems’ potential to store carbon and filter out pollution at the land-ocean interface.

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来源期刊

Estuarine Coastal and Shelf Science 地学-海洋学

CiteScore

5.60

自引率

7.10%

发文量

374

审稿时长

9 months

期刊介绍： Estuarine, Coastal and Shelf Science is an international multidisciplinary journal devoted to the analysis of saline water phenomena ranging from the outer edge of the continental shelf to the upper limits of the tidal zone. The journal provides a unique forum, unifying the multidisciplinary approaches to the study of the oceanography of estuaries, coastal zones, and continental shelf seas. It features original research papers, review papers and short communications treating such disciplines as zoology, botany, geology, sedimentology, physical oceanography.