Study

Effects of tidal inundation and predation on Avicennia germinans seedling establishment and survival in a sub-tropical mangal/salt marsh community

  • Published source details Patterson S., McKee K.L. & Mendelssohn I.A. (1997) Effects of tidal inundation and predation on Avicennia germinans seedling establishment and survival in a sub-tropical mangal/salt marsh community. Mangroves and Salt Marshes, 1, 103-111

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

    A replicated study in 1988–1990 on the coast of Louisiana, USA (Patterson et al. 1997) reported 40–55% survival of planted black mangrove Avicennia germinans propagules after 15 months, and that the average height of surviving seedlings increased. After four months, 89–92% of propagules were still alive (31–33% of which were rooted and upright). After 15 months, 44–55% of propagules were still alive (all of these were rooted and upright). Surviving seedlings were 25–28 cm tall on average. The survival rate was statistically similar for propagules introduced to mangroves or salt marshes, but seedlings grew significantly more within salt marshes. Methods: In November 1998, twenty field-collected black mangrove propagules were placed loose within each of 32 cages (0.1 m2, 6 mm mesh, 0.6 m tall). Half of the cages were within existing black mangrove vegetation and half were in salt marsh vegetation (dominated by smooth cordgrass Spartina alterniflora) further inland. Propagules/seedlings were monitored in March 1989 and February 1990.

    (Summarised by: Nigel Taylor)

Output references

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