对十八英里沼泽(澳大利亚东部)沉积物的高分辨率分析记录了它从波动的沿海泻湖到稳定的淡水沼泽的转变

IF 1.9 3区 地球科学 Q3 GEOGRAPHY, PHYSICAL
Jonathan C. Marshall, John Tibby, Patrick Moss, Hailey Martin, Allen Gontz, Annie Lau, Geraldine E. Jacobsen, Haidee Cadd, Patricia S. Gadd, Peter Negus, GLENN B. Mcgregor, Harald Hofmann, Cameron Schulz, Cameron Barr, Sabika Maizma, Mike Hotchkis, Nicole Cloutier
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引用次数: 0

摘要

本研究记录了澳大利亚北斯特拉德布鲁克岛(Minjerribah)十八英里沼泽的古环境演变,在过去的大约1600年里,从振荡的沿海泻湖到稳定的淡水沼泽。我们通过物理描述、硫酸土壤测定、粒度分析、硅藻和花粉组合、光合色素含量、Itrax XRF光谱以及探地雷达截面分析了多个沉积物岩心。这为湿地的演化提供了详细的生态、地球化学和年代学框架,这些框架来自放射性碳、Pu和210Pb测年。结果表明,大约300至1000年前,沉积条件从河口泥到淡水泥炭的显著转变时间具有空间复杂性,其特征是化学和生态的突变。出乎意料的是,在主要河口阶段中,至少有三个甚至可能许多个主要的淡水影响时期,这表明,由于地下水流入,河口偶尔会关闭和更新。研究结果为了解亚热带湿地系统对环境变化的复杂响应提供了重要见解,强调了跨学科方法在理解沿海湿地的沉积和地貌响应及其对未来气候变化的潜在脆弱性方面的重要性。对十八英里沼泽的研究意义重大,因为它提供了详细的古环境重建,记录了湿地在过去两千年中的演变性质。这项研究强调了了解湿地对环境变化的历史反应的重要性,这有助于为湿地当前和未来的管理、保护和恢复工作提供信息,特别是在气候变化和人类影响的背景下。这项研究也是对已故琳达·佩瑟里克(Lynda Petherick)的致敬,承认她在这一领域的贡献。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High-resolution analysis of sediments from Eighteen Mile Swamp (eastern Australia) records its transition from a fluctuating coastal lagoon to stable freshwater swamp

This research documents the paleoenvironmental evolution of Eighteen Mile Swamp on North Stradbroke Island (Minjerribah), Australia, from oscillating coastal lagoon into stable freshwater swamp over the last ca. 1600 years. We analyzed multiple sediment cores via physical description, acid sulfate soil assays, particle size analysis, diatom and pollen assemblages, photosynthetic pigment content, and Itrax XRF spectrometry, alongside ground-penetrating radar cross-sections. This provided a detailed ecological, geochemical and chronological framework, derived from radiocarbon, Pu and 210Pb dating, for the wetland's evolution. Results indicate spatial complexity in the timing of a pronounced shift in sedimentary conditions between ca. 300 and 1000 years ago, from estuarine mud to freshwater peat, marked by abrupt chemical and ecological changes. Unexpectedly, there were at least three and potentially many periods of dominant freshwater influence within the primarily estuarine phase, suggesting episodic estuarine closure and freshening by groundwater influx. Results provide critical insights into the complex response of subtropical wetland systems to environmental change, emphasizing the importance of interdisciplinary approaches in understanding both sedimentologic and geomorphic responses in coastal wetlands, and their potential vulnerability to future climate change. The study of Eighteen Mile Swamp is significant as it provides a detailed paleoenvironmental reconstruction that documents the wetland's evolving nature over the past two millennia. This research highlights the importance of understanding historical responses of wetlands to environmental changes, which helps inform their current and future management, conservation and restoration efforts, particularly in the context of climate change and human impacts. This study also serves as a tribute to the late Lynda Petherick, acknowledging her contributions in this field.

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来源期刊
Journal of Quaternary Science
Journal of Quaternary Science 地学-地球科学综合
CiteScore
4.70
自引率
8.70%
发文量
82
审稿时长
6-12 weeks
期刊介绍: The Journal of Quaternary Science publishes original papers on any field of Quaternary research, and aims to promote a wider appreciation and deeper understanding of the earth''s history during the last 2.58 million years. Papers from a wide range of disciplines appear in JQS including, for example, Archaeology, Botany, Climatology, Geochemistry, Geochronology, Geology, Geomorphology, Geophysics, Glaciology, Limnology, Oceanography, Palaeoceanography, Palaeoclimatology, Palaeoecology, Palaeontology, Soil Science and Zoology. The journal particularly welcomes papers reporting the results of interdisciplinary or multidisciplinary research which are of wide international interest to Quaternary scientists. Short communications and correspondence relating to views and information contained in JQS may also be considered for publication.
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