Effects of sediment application on Nyssa aquatica and Taxodium distichum saplings

Wetlands
By: , and 

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Abstract

The decline of Taxodium distichum forests along the Gulf Coast of North America is partly due to elevation loss and subsequent flooding. In many coastal wetlands, a common approach for coastal restoration is to rebuild elevation through the application of dredge material, but this technique has not been used widely in coastal forests due to concerns of negatively impacting trees. This experiment explored growth responses of Nyssa aquatica and T. distichumsaplings to applications of low salinity dredge material (0.08 ± 0.001 ppt) in a greenhouse setting. Compared to controls, saplings of T. distichum grown in 7 and 15 cm sediment depths had greater final height, and increased stem and total biomass. In contrast, N. aquatica did not respond to sediment application. The absence of a negative response to sediment application in these two species indicates that dredge material application has the potential to improve the ecosystem health of sinking swamp forests by raising their elevation. We recommend that field trials applying sediment additions in coastal forests include careful monitoring of ecosystem responses, including seed bank expression, seedling regeneration, and root and canopy production.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Effects of sediment application on Nyssa aquatica and Taxodium distichum saplings
Series title Wetlands
DOI 10.1007/s13157-018-1011-z
Volume 38
Issue 4
Year Published 2018
Language English
Publisher Springer
Contributing office(s) Wetland and Aquatic Research Center
Description 5 p.
First page 855
Last page 859