A palynological record of mangrove biogeography, coastal geomorphological change, and prehistoric human activities from Cedar Keys, Florida, U.S.A.

Autor: Yao Q; Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, LA 70803, United States of America., Liu KB; Department of Oceanography and Coastal Sciences and Coastal Studies Institute, Louisiana State University, Baton Rouge, LA 70803, United States of America., Rodrigues E; Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, LA 70803, United States of America; Institute of Geosciences, University of São Paulo, São Paulo, Brazil., Fan D; School of Ocean and Earth Science, Tongji University, 1239 Siping Road, Shanghai 200092, China., Cohen M; Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, LA 70803, United States of America; Graduate Program of Geology and Geochemistry, Federal University of Pará, Av. Perimentral 2651, Terra Firme, 66077-530 Belém, PA, Brazil. Electronic address: mcohen@ufpa.br.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2023 Feb 10; Vol. 859 (Pt 1), pp. 160189. Date of Electronic Publication: 2022 Nov 14.
DOI: 10.1016/j.scitotenv.2022.160189
Abstrakt: Under the continuous warming trend in the 21st century, mangroves are likely to migrate into more temperate regions in North and South America. However, the biogeography of different mangrove species is still unclear, especially near their latitudinal range limits in the two continents. This study utilizes palynological, geochemical, and sedimentological analyses to record changes in the coastal morphology and vegetation during the Holocene in Cedar Keys, Florida, the mangrove sub-range limit in North America. The multi-proxy dataset indicates that the milder winters during the Medieval Climate Anomaly likely facilitated the establishment of mangroves in the study region, where Avicennia, Laguncularia, and Rhizophora were established in the ~12th (790-850 cal yr BP), ~14th (580-660 cal yr BP), and ~ 16th century (440-460 cal yr BP), respectively. Thus, the Medieval Climate Anomaly likely triggered the poleward mangrove migration in North and South America synchronously. Moreover, the multi-proxy dataset also documents the obliteration of the Woodland Culture near Cedar Keys, where a once-thriving native civilization on Seahorse Key was driven out by the European colonizers, who settled on the mainland and Atsena Otie Key. Over time, the relict sites of the Woodland people on Seahorse Key were covered by mangroves and marsh vegetation since the ~16th century. Overall, our dataset suggests that industrial-era warming may have intensified the poleward mangrove expansion, although this trend had started earlier during the Medieval Climate Anomaly.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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