使用河流沉积物记录中的宏观化石追踪水建设和恢复对侧道生物多样性的影响
André-Marie Dendievel1, Jérémie Riquier2, Brice Mourier1
1Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, 69518 Vaulx-en-Velin, France.
The Science of the total environment
|October 30, 2024
概括
在河流沉积物中分析植物和动物宏观化石,揭示了几十年来生态系统的变化. 这种古生态方法可靠地重建了沿海息地历史和生物多样性因河流管理而发生的变化.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 沉积物学的沉积物学
背景情况:
- 最近的沉积物档案对生态研究具有挑战性,因为有机物质较少,动态性较强.
- 河流沉积物核心通常用于污染趋势,而不是生态系统变化.
- 人类化的河流需要新的方法来重建历史的生态动态.
研究的目的:
- 评估在侧流中使用植物和动物宏观化石的可靠性,以重建人类化河流最近的生态系统变化.
- 重建罗纳河绕行部分的水生态历史.
- 评估河流开发和恢复对沿海生物多样性的影响.
主要方法:
- 从河流沉积物核心中分析植物宏观化石 (种子,木材,),动物遗骸和非生物材料 (铁渣).
- 考古生态技术应用于最近的沉积物档案.
- 河流段两侧侧道的宏观化石记录的比较.
主要成果:
- 宏观化石记录提供了沿海息地和生物多样性的连贯历史.
- 确定了三个不同的水生态阶段:在造前的性阶段,20世纪70年代末的土地化阶段和2000年后的恢复效应.
- 该研究记录了河岸动植物的变化,包括热植物的扩张和恢复后新水生种群的出现.
结论:
- 在侧道沉积物中研究宏观化石是了解1945年后沿海息地和生物多样性历史的可靠方法.
- 这种方法可以跟踪生态系统的演变,以应对河流管理和恢复行动.
- 宏观化石方法作为监测数据的宝贵补充,用于解释河流系统的湿地变化.
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