Produce guidance for marsh or swamp conservation

How is the evidence assessed?
  • Effectiveness
  • Certainty
  • Harms

Study locations

Key messages

  • One study evaluated the effects, on vegetation or human behaviour, of producing guidance for marsh or swamp conservation. The study was in Sri Lanka.








  • Survival (1 study): One study of coastal sites in Sri Lanka found that planted mangrove propagules/seedlings had a higher survival rate in sites where published guidance had been consulted to select appropriate areas for planting, than in sites where guidance was not consulted.

About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Supporting evidence from individual studies

  1. A study in 2012–2014 of 23 coastal sites in Sri Lanka (Kodikara et al. 2017) found that the average survival rate of planted mangrove propagules/seedlings was higher in sites where technical guidance was used (46%) than in sites where it was not used (0%). Methods: Between 2012 and 2014, the number of surviving, healthy mangrove trees was counted or estimated in 23 coastal sites around Sri Lanka. Mangrove propagules and seedlings (97% of which were Rhizophora spp.) had been planted between 1996 and 2009, with multiple planting attempts in all sites. Six sites used published technical guidance to direct planting towards sites thought to be ecologically, socially and/or politically suitable. The other 17 sites did not refer to technical guidance. Note that all of the sites that used guidance also carried out post-planting care (e.g. removing debris and righting fallen seedlings), whereas 13 of the 17 sites that did not use guidance did not carry out post-planting care.

    Study and other actions tested
Please cite as:

Taylor N.G., Grillas P., Smith R.K. & Sutherland W.J. (2021) Marsh and Swamp Conservation: Global Evidence for the Effects of Interventions to Conserve Marsh and Swamp Vegetation. Conservation Evidence Series Synopses. University of Cambridge, Cambridge, UK.

Where has this evidence come from?

List of journals searched by synopsis

All the journals searched for all synopses

Marsh and Swamp Conservation

This Action forms part of the Action Synopsis:

Marsh and Swamp Conservation
Marsh and Swamp Conservation

Marsh and Swamp Conservation - Published 2021

Marsh and Swamp Synopsis

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