Study

Restoration and recovery of hurricane-damaged mangroves using the knickpoint retreat effect and tides as dredging tools

  • Published source details Bashan Y., Moreno M., Salazar B.G. & Alvarez L. (2013) Restoration and recovery of hurricane-damaged mangroves using the knickpoint retreat effect and tides as dredging tools. Journal of Environmental Management, 116, 196-203.

Actions

This study is summarised as evidence for the following.

Action Category

Facilitate tidal exchange to restore degraded brackish/saline swamps

Action Link
Marsh and Swamp Conservation
  1. Facilitate tidal exchange to restore degraded brackish/saline swamps

    A before-and-after study in 2004–2009 of a mangrove forest in northwest Mexico (Bashan et al. 2013) reported that after excavating a channel to restore tidal exchange, the area of live mangrove trees increased. Before excavation, the site contained only 2,890 m2 of live mangrove trees. Approximately five years after excavation, the site contained 11,830 m2 of live mangrove trees. Mangroves recolonized the site and expanded into surrounding sand dunes. The same three tree species were present before and after restoration, in similar proportions (% of total mangrove area): 49% red mangrove Rhizophora mangle, 23–24% black mangrove Avicennia germinans and 27–28% white mangrove Laguncularia racemosa. Methods: In April–June 2004, tidal exchange was restored to a degraded mangrove forest by excavating a stepped outlet channel through a sandbar (deposited by a hurricane three years previously). The channel had to be cleared of sediment twice after the initial excavation. The area covered by live mangrove trees was measured from satellite images, and verified with field surveys, before excavation (early 2004) and approximately five years after (2009).

    (Summarised by: Nigel Taylor)

Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust