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首页> 外文期刊>Estuarine Coastal and Shelf Science >Combined use of aerogammaspectrometry and geochemistry to access sediment sources in a shallow coral site at Armacao dos Buzios, Brazil
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Combined use of aerogammaspectrometry and geochemistry to access sediment sources in a shallow coral site at Armacao dos Buzios, Brazil

机译：结合使用航空伽玛能谱仪和地球化学技术来获取巴西阿马卡奥多斯布齐奥斯的一个浅珊瑚区的沉积物来源

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摘要

Coral and reef environments in shallow waters are negatively affected by human activities in several coastal areas worldwide. It has been demonstrated that sediment influx and macronutrient discharges induce decline of coral population structure and diversity. Therefore, efforts to quantify sediment flux, sources and the biological response to sedimentation were conducted by several marine researchers. Herein, we investigated the case study of Armac,ao dos Buzios/Brazil/Western South Atlantic, where coral colonies (mostly Siderastrea stellata) are under stress due to sediment apportionment as a consequence of regional human occupation. Classification of potential sediment source regions was based on a high-resolution aerogammaspectrometry survey for ~(232)Th, ~(238)U and ~(40)K in main land near shore, used as primarily tool, in combination with sediment geochemistry. This approach allowed distinguishing three hydrographic basins (Macae river basin, Sao Joao river basin and Una river basin) as potential sources. Hierarchical cluster analysis applied to the set of parameters identified the Macae River as the most probable sediment contributor to the coralline site.
机译：全世界数个沿海地区的人类活动对浅水区的珊瑚和礁石环境造成了负面影响。事实证明，沉积物的大量涌入和大量营养元素的释放会导致珊瑚种群结构和多样性的下降。因此，一些海洋研究人员进行了量化沉积物通量，来源和对沉积的生物学反应的工作。在这里，我们调查了Armac，ao dos Buzios /巴西/ Southern Western Atlantic的案例研究，该地区的珊瑚群落（主要是Siderastrea stellata）由于区域人类占领而由于沉积物分配而处于压力之下。潜在沉积物来源地区的分类是基于高分辨率的航空伽马能谱测量法，结合附近沉积物的主要地球化学手段，对海岸附近主要土地的〜（232）Th，〜（238）U和〜（40）K进行了研究。这种方法可以区分三个水文盆地（马卡埃河流域，圣若昂河流域和乌纳河流域）作为潜在来源。应用于该组参数的层次聚类分析确定，马卡河是造成珊瑚礁地点最可能的沉积物。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2010年第4期|p.526-534|共9页
  • 作者

    Danielly Godiva; Heitor Evangelista; Milton Kampel; Marcus Vinicius Licinio; Casimiro Munita;

  • 作者单位

    LARAMG - Laboratorio de Radioecologia e Mudancas Globais-DBB/IBRAG/Uerj, Pav. HLC. Subsolo, Rua Sao Francisco Xavier, 524 Maracana, 20550-013 Rio de Janeiro, RJ, Brazil;

    LARAMG - Laboratorio de Radioecologia e Mudancas Globais-DBB/IBRAG/Uerj, Pav. HLC. Subsolo, Rua Sao Francisco Xavier, 524 Maracana, 20550-013 Rio de Janeiro, RJ, Brazil;

    Instituto Nacional de Pesquisas Espaciais, Divisao de Sensoriamento Remoto, Av. dos Astronautas 1758, 12227-010 Sao Jose dos Campos, SP, Brazil;

    LARAMG - Laboratorio de Radioecologia e Mudancas Globais-DBB/IBRAG/Uerj, Pav. HLC. Subsolo, Rua Sao Francisco Xavier, 524 Maracana, 20550-013 Rio de Janeiro, RJ, Brazil;

    Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP, Av Prof. Lineu Prestes 2242, Cidade Universitaria USP. Sao Paulo, SP, Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    radioisotopes; siderastrea stellata; sedimentation; armacao dos buzios; aerogammaspectrometry;

    机译：放射性同位素铁线莲沉降;布基亚斯航空γ光谱仪;

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