富营养化使潮汐红树林地表海拔变化潜能饱和

IF 2.3 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Jeremy R. Conrad, Ken W. Krauss, Brian W. Benscoter, Ilka C. Feller, Nicole Cormier, Darren J. Johnson
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引用次数: 0

摘要

由于海平面上升(SLR),沿海红树林面临被淹没的风险。然而,由于各种生物和物理反馈机制使红树林能够增加和保持土壤表面的相对高程,红树林在海平面不断变化的情况下仍能生存。因此,红树林对可持续海平面上升的抵御能力取决于它们以与可持续海平面上升同步的速度增加土壤海拔的能力,或足够向内陆迁移的能力。人为干扰,如水文和富营养化的改变,会降低红树林的健康状况,破坏这一造林过程,使红树林面临更大的风险。佛罗里达州的大部分红树林都毗邻高度城市化的地区,这些地区会产生富含营养物质的径流。本研究评估了富营养化的 Caloosahatchee 河口试验性营养物质输入如何影响两个不同红树林区的土壤表面高程变化(SEC)。磷添加量降低了土壤表面高程变化的年速率,而且不同红树林区的年速率也不同,边缘区和盆地区的年速率分别为 0.67 ± 0.59 至 2.13 ± 0.61 毫米/年和 4.21 ± 0.58 至 6.39 ± 0.59 毫米/年。这表明,富营养化可降低 SEC 对可持续土地退化的最大潜在响应,而且红树林对可持续土地退化的脆弱性在整个森林中并不一致,而是因红树林区域而异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Eutrophication Saturates Surface Elevation Change Potential in Tidal Mangrove Forests

Eutrophication Saturates Surface Elevation Change Potential in Tidal Mangrove Forests

Coastal mangrove forests are at risk of being submerged due to sea-level rise (SLR). However, mangroves have persisted with changing sea levels due to a variety of biotic and physical feedback mechanisms that allow them to gain and maintain relative soil surface elevation. Therefore, mangrove’s resilience to SLR is dependent upon their ability to build soil elevation at a rate that tracks with SLR, or well-enough to migrate inland. Anthropogenic disturbances, such as altered hydrology and eutrophication, can degrade mangrove forest health and compromise this land building process, placing mangroves at greater risk. Much of Florida’s mangroves are adjacent to highly urbanized areas that produce nutrient-loaded runoff. This study assesses how experimental nutrient inputs in the eutrophic Caloosahatchee Estuary influence the soil surface elevation change (SEC) in two distinct mangrove zones. Annual rates of SEC were reduced by phosphorus additions and differed by mangrove zone, ranging from 0.67 ± 0.59 to 2.13 ± 0.61 and 4.21 ± 0.58 to 6.39 ± 0.59 mm year−1 in the fringe and basin zone, respectively. This suggests that eutrophication can reduce the maximum potential SEC response to SLR and that a mangrove forest’s vulnerability to SLR is not uniform throughout forest but can differ by mangrove zone.

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来源期刊
Estuaries and Coasts
Estuaries and Coasts 环境科学-海洋与淡水生物学
CiteScore
5.60
自引率
11.10%
发文量
107
审稿时长
12-24 weeks
期刊介绍: Estuaries and Coasts is the journal of the Coastal and Estuarine Research Federation (CERF). Begun in 1977 as Chesapeake Science, the journal has gradually expanded its scope and circulation. Today, the journal publishes scholarly manuscripts on estuarine and near coastal ecosystems at the interface between the land and the sea where there are tidal fluctuations or sea water is diluted by fresh water. The interface is broadly defined to include estuaries and nearshore coastal waters including lagoons, wetlands, tidal fresh water, shores and beaches, but not the continental shelf. The journal covers research on physical, chemical, geological or biological processes, as well as applications to management of estuaries and coasts. The journal publishes original research findings, reviews and perspectives, techniques, comments, and management applications. Estuaries and Coasts will consider properly carried out studies that present inconclusive findings or document a failed replication of previously published work. Submissions that are primarily descriptive, strongly place-based, or only report on development of models or new methods without detailing their applications fall outside the scope of the journal.
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