Study

Assessment of community-based restoration of Pichavaram mangrove wetland using remote sensing data

  • Published source details Selvam V., Ravichandran K.K., Gnanappazham L. & Navamuniyammal M. (2003) Assessment of community-based restoration of Pichavaram mangrove wetland using remote sensing data. Current Science, 85, 794-798

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

Engage local people in management/monitoring of marshes or swamps

Action Link
Marsh and Swamp Conservation

Directly plant trees/shrubs: brackish/saline wetlands

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

    A before-and-after study in 1986–2002 of a coastal wetland in southern India (Selvam et al. 2003) reported that after excavating channels to restore tidal exchange and planting mangrove seedlings, the area of mangrove forest increased. Before intervention, the site contained only 325 ha of mangrove forest (all mature) and 375 ha of degraded mangrove. Approximately six years after intervention began, the site contained 618 ha of mangrove forest (411 ha mature; 297 ha developing) and only 65 ha of degraded mangrove. Methods: Large scale restoration of a degraded mangrove forest began in 1996. Tidal exchange was restored to subsided, stagnant areas by excavating tidal channels. Then, mangrove seedlings were planted (details not reported). The study does not distinguish between the effects, on naturally colonizing vegetation, of planting and restoring tidal exchange. The local community was engaged in restoration and long-term management of the mangroves (e.g. de-silting tidal channels). The area covered by mangrove vegetation was measured from satellite images, and verified with field surveys, before intervention (1982) and approximately six years after it began (2002).

    (Summarised by: Nigel Taylor)

  2. Engage local people in management/monitoring of marshes or swamps

    A before-and-after study in 1986–2002 of a coastal wetland in southern India (Selvam et al. 2003) reported that following a community-based restoration programme, the area of mangrove forest increased. Before intervention, the site contained only 325 ha of mangrove forest (all mature) and 375 ha of degraded mangrove. Approximately six years after intervention began, the site contained 618 ha of mangrove forest (411 ha mature; 297 ha developing) and only 65 ha of degraded mangrove. Methods: Large scale restoration of a degraded mangrove forest began in 1996. The local community was involved in identifying the cause of degradation, planning and implementing restoration activities (excavating tidal channels and planting mangrove seedlings) and long-term management of the site (e.g. de-silting tidal channels, protecting young trees from herbivores). The area covered by mangrove vegetation was measured from satellite images, and verified with field surveys, before intervention (1982) and approximately six years after it began (2002).

    (Summarised by: Nigel Taylor)

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

    A before-and-after study in 1986–2002 of a coastal wetland in southern India (Selvam et al. 2003) reported that after excavating channels to restore tidal exchange and planting mangrove seedlings, the area of mangrove forest increased. Before intervention, the site contained only 325 ha of mangrove forest (all mature) and 375 ha of degraded mangrove. Approximately six years after intervention began, the site contained 618 ha of mangrove forest (411 ha mature; 297 ha developing) and only 65 ha of degraded mangrove. Methods: Large scale restoration of a degraded mangrove forest began in 1996. Tidal exchange was restored to subsided, stagnant areas by excavating tidal channels. Then, mangrove seedlings were planted (details not reported). The study does not distinguish between the effects, on naturally colonizing vegetation, of planting and restoring tidal exchange. The local community was engaged in restoration and long-term management of the mangroves (e.g. de-silting tidal channels). The area covered by mangrove vegetation was measured from satellite images, and verified with field surveys, before intervention (1982) and approximately six years after it began (2002).

    (Summarised by: Nigel Taylor)

Output references

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