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在一个热带河口的潮间梯度上,微生物本的时空动态使用了Sentinel-2图像

S Haro¹, T Mucheye², I Caballero³

¹Department of Biology, Faculty of Marine and Environmental Sciences, University of Cádiz, Puerto Real 11510, Cádiz, Spain.

The Science of the total environment

|January 18, 2025

概括

热带河口的微生物 (MPB) 动态对于沿海生产力至关重要. 这项研究使用卫星图像来监测哥斯达黎加的MPB,发现季节性变化和更高的丰度在上游潮区.

科学领域:

沿海生态沿海生态
海洋生物学海洋生物学
遥感遥感遥感遥感

背景情况:

潮间的泥平原是由微型植物本土 (MPB) 驱动的高生产力生态系统.
在温带地区,MPB的动态得到了很好的研究,但在热带河口却缺乏研究.
热带河口,如尼科亚湾,至关重要,但缺乏广泛的MPB研究.

研究的目的:

研究MPB在热带河口 (哥斯达黎加尼科亚湾) 的时空动态.
用高分辨率卫星数据评估MPB覆盖率和增长率.
了解影响MPB分布和季节性变化的因素.

主要方法:

利用 Sentinel-2 卫星图像 (2018-2022) 进行 10m 空间分辨率监控.
员工规范差异植被指数 (NDVI) 用于量化MPB覆盖面和生长率 (μNDVI).
应用通用添加模型 (GAM) 来分析时空变化.

主要成果:

MPB NDVI显示出显著的时间变化,在雨季晚期/干季早期 (11月-12月) 达到峰值.
多年和几个月解释了高达62%的平均MPBNDVI变化的变化.
干旱季高温和辐射可能会抑制MPB的生长,与温带模式不同.
在上游潮区观察到较高的MPB NDVI,与温带河口相一致.

结论:

高分辨率卫星图像对热带潮平面的长期MPB监测是有效的.
热带河口的MPB动态表现出独特的季节性模式,受到温度和辐射的影响.
这项研究为全球估计潮间MPB的关键生态系统服务提供了一个工具.

关键词:

地微藻是地微藻的一种.覆盖覆盖覆盖覆盖潮间的时间.NDVI NDVI 在线阅读遥感是一种远程传感.热带地区热带地区

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