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两贝反映了肥占主导地位的河口中的15N丰富

Lena K Champlin¹, Michelle Gannon², Jocelyn A Sessa²

¹Department of Biodiversity, Earth & Environmental Sciences and the Academy of Natural Sciences, Drexel University, Philadelphia, PA, USA; Department of Earth & Environment, Boston University, Boston, MA, USA.

Marine pollution bulletin

|September 8, 2024

概括

农业产生的 (N) 污染是沿海地区的一个主要问题. 在双贝中分析同位素揭示了过去1000年的农业N输入和河口的来源.

科学领域:

环境地质化学环境地质化学
古海洋学是古海洋学.
河口生态学河口生态学

背景情况:

农业 (N) 是沿海地区全球污染的主要驱动因素.
双贝中的同位素对于重建历史的河口污染是有价值的,但肥N应用仍未得到充分研究.
河口面临着由营养物质负载造成的重大挑战,影响生态系统健康和水质.

研究的目的:

用双贝在加利福尼亚河口的气输入和来源的空间和长期变化进行调查.
评估有机同位素的实用性,与 δ18O 和 δ13C 一起,用于跟踪农业污染.
为了重建过去1000年的历史营养动态.

主要方法:

在现代,博物馆和亚化石双贝 (Mytilus和Ostrea) 中分析有机同位素 (δ15N),δ18O和δ13C.
在从加利福尼亚河口采集的双贝中的同位素组成的概况,其中有一个农业流域.
整合同位素数据以确定源和加工的空间模式和时间变化.

主要成果:

双同位素组成的空间模式与流域营养投入和河口生产力相关联.
现代和历史贝样本的比较表明,在过去的千年里,源或加工过程发生了变化.
贝中的同位素值提供了对农业污染对河口生态系统的历史影响的见解.

结论:

两贝作为有效的档案,用于重建沿海河口的历史农业投入.
对双贝的同位素分析可以区分营养来源,并追踪长时间内N循环的变化.
这种方法为了解和管理敏感河口环境中的农业污染提供了有价值的工具.

关键词:

迈蒂卢斯 (Mytilus) 是一个古人.气气是一种气.奥斯特里亚奥斯特里亚代理代理是什么意思代理代理是什么意思贝贝贝贝贝是一个它是稳定的同位素.

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