陆地输入促进了墨西哥红树林中有机碳的积累
J L J Jupin1, A C Ruiz-Fernández2, A Sifeddine3
1Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Universidad 3000, Ciudad Universitaria, Coyoacán, 04510 Ciudad de México, Mexico; IRD, CNRS, SU, MNHN, IPSL, LOCEAN, Laboratoire d'Océanographie et du Climat: Expérimentation et Approches Numériques Centre IRD France Nord, 93143 Bondy, France.
The Science of the total environment
|May 27, 2024
概括
红树林生态系统有效地储存有机碳 (Corg),作为重要的蓝色碳汇. 这项研究量化了墨西哥红树林中的Corg埋葬率和库存,揭示了河流的影响和当地投入在上个世纪对碳封存产生了重大影响.
科学领域:
- * 环境科学 环境科学
- * * 海洋生物学 海洋生物学
- * 气候变化缓解减缓工作
背景情况:
- *红树林生态系统通过吸收大气中的二氧化碳 (CO2) 和封存碳来缓解气候变化至关重要.
- *人类的威胁导致了过去一个世纪全球红树林覆盖面的显著下降.
- * 了解红树林中的碳动态对于有效的保护和气候战略至关重要.
研究的目的:
- *为了量化有机碳 (Corg) 来源贡献,埋葬率和墨西哥红树林沉积物的库存.
- * 通过使用210测年法,分析大约100年Corg动态的时间变化.
- * 调查当地的环境因素,如河流输入,对Corg捕获的影响.
主要方法:
- * 分析了来自墨西哥三个不同红树林地区的七个-210年代沉积物核心.
- * 应用贝叶斯追踪器混合模型 (MixSIAR) 来确定Corg源.
- * 标准化方法量化科尔格人的埋葬率和库存.
主要成果:
- * 的埋葬率有很大的差异,从66 ± 16到400 ± 40g m−2 yr−1.1.
- *鱼种群在50厘米深处从84.9±0.7到255±2毫克每公里每小时,在1米深处从137±2到241±4毫克每公里每小时.
- *最高的Corg埋葬和库存是在减少河流影响和高数量的红树林碎片的地区发现的,与全球模式形成对比. 增加的趋势与增加的河流和红树林Corg输入有关.
结论:
- * 尽管全球覆盖率下降,墨西哥的红树林地区仍然是有机碳的高效生产者和沉积点.
- * 当地河流的影响和红树林碎片是Corg埋葬和库存空间变化的关键驱动因素.
- *持续增强全球数据库,包括地点特征和准确的日期,对于比较研究和有效的蓝色碳管理至关重要.
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