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A spatiotemporal framework to assess the bio-geomorphic interplay of saltmarsh vegetation and tidal emergence (Western Scheldt estuary)
Feng, J.; Grandjean, T.; van de Koppel, J.; van der Wal, D. (2025). A spatiotemporal framework to assess the bio-geomorphic interplay of saltmarsh vegetation and tidal emergence (Western Scheldt estuary). International Journal of Applied Earth Observation and Geoinformation 136: 104337. https://dx.doi.org/10.1016/j.jag.2024.104337
In: International Journal of Applied Earth Observation and Geoinformation. International Institute for Aerial Survey and Earth Sciences: Enschede. ISSN 1569-8432; e-ISSN 1872-826X, meer
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| Auteurs | | Top |
- Feng, J.
- Grandjean, T., meer
- van de Koppel, J., meer
- van der Wal, D., meer
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| Abstract |
Sea level changes will significantly drive hydrodynamic, morphological, and ecological development of estuaries. However, the interplay of geomorphology and vegetation at estuary scales remains unclear. To better understand this process, we take the Western Scheldt estuary in the Netherlands as an example to reveal the link between changes in emersion duration and vegetation dynamics in the period 1993–2016. We found that tidal flats in the Western Scheldt become steeper—higher intertidal areas increased in elevation and emersion duration, whereas the low-lying edges of tidal flats experienced a decrease in elevation and emersion duration. We found that longer emersion duration was associated with increased plant diversity and cover. Furthermore, we detected the unique spatiotemporal response patterns of four abundant plant species to geomorphological variations. Our study suggests that on a large estuary scale, geomorphological changes are coupled to the richness and cover of plant communities, and that potential changes in relative sea level can induce structural modifications of the plant communities. It also emphasizes the importance of assessing the potential effects of localized relative sea level changes while considering all aspects of natural processes and direct and indirect human influences. Our study provides a framework to assess the bio-geomorphic processes in a spatially explicit way. |
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