Impact of coastal industrialization and urbanization on marine phosphorus cycle: Insights from Daya Bay and Zhelin Bay

IF 7.2 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Gondwana Research Pub Date : 2025-01-19 DOI:10.1016/j.gr.2025.01.010

Yang-Guang Gu, Ya-Su Wang, Richard W. Jordan, Yan-Peng Gao, Hong-Hui Huang, Shi-Jun Jiang

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Abstract

Coastal sediments serve as an important sink for phosphorus from terrestrial sources, yet the impact of coastal industrialization and urbanization on marine phosphorus cycling remains poorly understood. This study employs the Dual-Mode Diffusive Gradients in Thin Films (DGT) technique to investigate the interplay between dissolved reactive phosphorus (DRP), dissolved sulfide (S2−), and iron (Fe2+) in surface sediments of Zhelin Bay and Daya Bay. Notably, Zhelin Bay, influenced by agricultural activities, displays significantly elevated Fe2+ (358.64 μg/L) and DRP (38.84 μg/L) levels, compared to the more industrially and urbanization-impacted Daya Bay, which has lower averages (Fe2+: 17.24 μg/L; DRP: 22.67 μg/L). Our analysis reveals strong linear correlations between Fe2+, S2−, and DRP, indicating that these dissolved species predominantly regulate DRP levels. These findings underscore the profound effects of coastal industrialization and urbanization on marine phosphorus dynamics, providing essential insights for the management and restoration of coastal ecosystems.

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沿海工业化和城市化对海洋磷循环的影响——来自大亚湾和柘林湾的启示

沿海沉积物是陆地源磷的重要汇，但沿海工业化和城市化对海洋磷循环的影响尚不清楚。本研究采用薄膜双模扩散梯度（DGT）技术研究了哲林湾和大亚湾表层沉积物中溶解活性磷（DRP）、溶解硫化物（S2−）和铁（Fe2+）的相互作用。值得注意的是，与受工业和城市化影响较大的大亚湾相比，柘林湾受农业活动的影响，Fe2+ (358.64 μg/L)和DRP （38.84 μg/L）水平显著升高，而大亚湾的平均值较低(Fe2+: 17.24 μg/L；DRP: 22.67 μg/L)。我们的分析显示Fe2+， S2−和DRP之间存在很强的线性相关性，表明这些溶解物质主要调节DRP水平。这些发现强调了沿海工业化和城市化对海洋磷动态的深刻影响，为沿海生态系统的管理和恢复提供了重要的见解。

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来源期刊

Gondwana Research 地学-地球科学综合

CiteScore

12.90

自引率

6.60%

发文量

298

审稿时长

65 days

期刊介绍： Gondwana Research (GR) is an International Journal aimed to promote high quality research publications on all topics related to solid Earth, particularly with reference to the origin and evolution of continents, continental assemblies and their resources. GR is an "all earth science" journal with no restrictions on geological time, terrane or theme and covers a wide spectrum of topics in geosciences such as geology, geomorphology, palaeontology, structure, petrology, geochemistry, stable isotopes, geochronology, economic geology, exploration geology, engineering geology, geophysics, and environmental geology among other themes, and provides an appropriate forum to integrate studies from different disciplines and different terrains. In addition to regular articles and thematic issues, the journal invites high profile state-of-the-art reviews on thrust area topics for its column, ''GR FOCUS''. Focus articles include short biographies and photographs of the authors. Short articles (within ten printed pages) for rapid publication reporting important discoveries or innovative models of global interest will be considered under the category ''GR LETTERS''.