Seasonal atmospheric and oceanographic factors influencing poleward mangrove expansion in the southeastern American coast
Ximenes, A.C.; Ponsoni, L.; Lira, C.F.; Dahdouh-Guebas, F.; Koedam, N. (2021). Seasonal atmospheric and oceanographic factors influencing poleward mangrove expansion in the southeastern American coast. Est., Coast. and Shelf Sci. 262: 107607. https://dx.doi.org/10.1016/j.ecss.2021.107607 In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, more |  |
| Author keywords | Wetlands; Mangrove limits; Species range; Biogeography; Oceanographic processes; Western South Atlantic mangroves |
| Authors | | Top | - Ximenes, A.C., more
- Ponsoni, L., more
- Lira, C.F.
| - Dahdouh-Guebas, F., more
- Koedam, N., more
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| Abstract | Mangrove ecosystems are distributed worldwide, along tropical and subtropical coastlines. For a long time, mangrove biogeographers have been challenged by the question: why is mangrove distribution restricted to its current latitudinal limits? The Ararangua estuary in Brazil is located similar to 75 km beyond the eastern South America mangrove limit. Despite its geomorphology apparently being suitable for mangrove colonization, mangroves have been reported absent from this estuary. In this work, we analyze key environmental variables (such as the longest available observational in-situ records of air temperature) and provide an assessment of other environmental players (such as the adjacent ocean circulation and upwelling system) to better understand which factors could be determinant in the species range limits in eastern South America. Our results and assessment suggest that, depending on the season, multiple factors could combine to prevent a poleward dispersion of mangrove species. These are mainly the northward-directed longshore drift which dominates throughout the year and the high occurrence of chilling events during winter, although seasonal upwelling of cold waters in spring and summer could also influence the propagules' viability. |
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