Of marsh and mangrove: coupled biophysical and anthropogenic drivers of 20th century wetland conversion in Tampa Bay Estuary, Florida (USA)
Of marsh and mangrove: coupled biophysical and anthropogenic drivers of 20th century wetland conversion in Tampa Bay Estuary, Florida (USA)
复制标题
DOI：
10.1016/j.ancene.2021.100295
复制
发表时间：
2021-05-06
期刊：
影响因子：
3.6
通讯作者：
Larson, Rebekka A.
中科院分区：
文献类型：
--
作者：
Jackson, Kendal;Brooks, Gregg R.;Larson, Rebekka A.
目前，茂密的红树林沼泽在美国佛罗里达州墨西哥湾中部半岛坦帕湾河口系统的潮汐湿地中占主导地位。然而，19 世纪末的海岸和大地测量地形图以及政府土地局的调查显示，湿地系统以盐沼为主，因此表明红树林的优势是 20 世纪侵蚀的产物。为了阐明生态系统变化的主要驱动因素，本研究将 2018 年收集的沉积物岩心的沉积学、古植物学和辐射分析与 1940 年至 1997 年间拍摄的航空摄影分析结合起来。通过历史和现代测绘的分析比较，以经验方式推断出湿地转变的真实情况，并建立了沿海环境变化的高分辨率年代学。这些结果表明，盐沼和盐草原栖息地在坦帕湾研究区域内一直持续到 20 世纪中叶。 1960 年至 1980 年间，在为控制蚊子而进行的密集开沟之后，红树林在 20 年的时间里迅速侵占了研究区域。研究结果展示了沿海地球工程、红树林自生态和海平面上升在 20 世纪末如何相互作用，加速了新颖海景的创造。 (C) 2021 Elsevier Ltd. 保留所有权利。
Dense mangrove swamps currently dominate tidal wetlands of the Tampa Bay Estuary System on the central peninsular Gulf Coast of Florida (USA). Late-19th century Coast and Geodetic Survey topographical charts and Government Land Office surveys, however, depict wetland systems dominated by salt marsh-therefore suggesting mangrove dominance as a product of 20th century encroachment. To clarify the primary drivers of ecosystem change, this study integrates sedimentological, paleobotanical, and radiometric analyses of sediment cores collected in 2018 with analyses of aerial photography taken between 1940 and 1997. Results empirically ground truth the wetland conversions inferred through analytical comparisons of historical and modern mapping and establish a high-resolution chronology for coastal environmental change. These results showed that salt marsh and salt prairie habitats persisted within Tampa Bay study areas until the mid-20th century. Mangrove forest rapidly encroached the study areas over a 20 year interval, between 1960 and 1980, immediately following intensive ditching for mosquito control. The findings demonstrate how coastal geoengineering, mangrove autoecology, and sea-level rise interacted across the late-20th century to accelerate the creation of novel seascapes. (C) 2021 Elsevier Ltd. All rights reserved.