Hydrologic restoration in a dynamic subtropical mangrove-to-marsh ecotone

Restoration Ecology
By: , and 

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Abstract

Extensive hydrologic modifications in coastal regions across the world have occurred to support infrastructure development, altering the function of many coastal wetlands. Wetland restoration success is dependent on the existence of hydrologic regimes that support development of appropriate soils and the growth and persistence of wetland vegetation. In Florida, United States, the Comprehensive Everglades Restoration Program (CERP) seeks to restore, protect, and preserve water resources of the greater Everglades region. Herein we describe vegetation dynamics in a mangrove-to-marsh ecotone within the impact area of a CERP hydrologic restoration project currently under development. Vegetation communities are also described for a similar area outside the project area. We found that vegetation shifts within the impact area occurred over a 7-year period; cover of herbaceous species varied by location, and an 88% increase in the total number of mangrove seedlings was documented. We attribute these shifts to the existing modified hydrologic regime, which is characterized by a low volume of freshwater sheet flow compared with historical conditions (i.e. before modification), as well as increased tidal influence. We also identified a significant trend of decreasing soil surface elevation at the impact area. The CERP restoration project is designed to increase freshwater sheet flow to the impact area. Information from our study characterizing existing vegetation dynamics prior to implementation of the restoration project is required to allow documentation of long-term project effects on plant community composition and structure within a framework of background variation, thereby allowing assessment of the project's success in restoring critical ecosystem functions.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Hydrologic restoration in a dynamic subtropical mangrove-to-marsh ecotone
Series title Restoration Ecology
DOI 10.1111/rec.12452
Volume 25
Issue 3
Year Published 2017
Language English
Publisher Wiley
Contributing office(s) Wetland and Aquatic Research Center
Description 12 p.
First page 471
Last page 482
Country United States
State Florida
Other Geospatial Big Cypress National Rreserve