Study

Factors influencing community mangrove planting success on Manus Island, Papua New Guinea

  • Published source details Arihafa A. (2016) Factors influencing community mangrove planting success on Manus Island, Papua New Guinea. Conservation Evidence, 13, 42-46.

Actions

This study is summarised as evidence for the following.

Action Category

Introduce tree/shrub seeds or propagules: brackish/saline wetlands

Action Link
Marsh and Swamp Conservation

Directly plant trees/shrubs: brackish/saline wetlands

Action Link
Marsh and Swamp Conservation
  1. Introduce tree/shrub seeds or propagules: brackish/saline wetlands

    A replicated study in 2012–2014 on the coast of Manus Island, Papua New Guinea (Arihafa 2016) reported that planted mangrove trees survived in 19 of 33 cases (species x site combinations). In these cases, the number of trees present was 4–102% of the number known to be planted; additional undocumented planting by local communities explains values >100%. Some planted propagules or saplings survived in seven of nine sites. All five planted species survived in at least one site. Methods: Between June 2012 and April 2014, more than 8,300 seedlings and ungerminated propagules of five mangrove species were planted in nine sites around Manus Island (1–9 sites/species). The study does not distinguish between the effects of planting propagules and seedlings. The number of propagules or seedlings introduced was recorded for about half of the area planted (where local communities were guided by NGO staff) but not for the other half (where local communities planted independently). Six of the nine sites had recently contained mangrove forests, but the other three had never been forested. Seedlings originating from planting efforts were counted in April 2014.

    (Summarised by: Nigel Taylor)

  2. Directly plant trees/shrubs: brackish/saline wetlands

    A replicated study in 2012–2014 on the coast of Manus Island, Papua New Guinea (Arihafa 2016) reported that planted mangrove trees survived in 19 of 33 cases (species x site combinations). In these cases, the number of trees present was 4–102% of the number known to be planted (additional undocumented planting by local communities explains values >100%). Some planted propagules or saplings survived in seven of nine sites. All five planted species survived in at least one site. Methods: Between June 2012 and April 2014, more than 8,300 seedlings and propagules of five mangrove species were planted in nine sites around Manus Island (1–9 sites/species). The study does not distinguish between the effects of planting seedlings and propagules. The number of seedlings or propagules introduced was recorded for about half of the area planted (where local communities were guided by NGO staff) but not for the other half (where local communities planted independently). Six of the nine sites had recently contained mangrove forests, but the other three had never been forested. Seedlings originating from planting efforts were counted in April 2014.

    (Summarised by: Nigel Taylor)

Output references
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