Restoration of mangroves at Balandra Lagoon

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Restoration of mangroves at Balandra Lagoon
2006
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One of the two lagoons of Balandra
La Paz - 25 Km
MANGROVE FOREST
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The second lagoon at Balandra
Mostly covered with mangrove forest
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Part of the deforested area in 1994(Clearcut,
possibly in 1990-1991)
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Part of the deforested area in 1994(Clearcut,
possibly in 1990-1991)
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The deforested area did not regenerate itself for
several years

• The solution
• Reforestation by nursery-reared trees planted in
  strategic places in the right habitat

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Native propagules (propagation units) of black
mangrove as a source for the nursery
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AERIAL ROOTS OF BLACK MANGROVES -- WHERE THE
MICROBIAL ACTIVITY IS INTENSE
LAGOON
Underground section
MUD
Toledo et al. 1995. Cyanobacteria and black
mangroves in Northwestern Mexico colonization,
and diurnal and seasonal nitrogen fixation on
aerial roots. Canadian Journal of Microbiology
41 999-1011
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COLONIZATION (biofilm) OF THE SURFACE OF THE
AERIAL ROOT OF BLACK MANGROVE
bacteria
Anabaena
Filamentous Cyanobacteria
COMPLETELY HIDDEN ROOT SURFACE
1 ?
Toledo et al. Can. J. Microbiol. 1995
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COLONIZATION OF MANGROVE ROOTS (in vitro) WITH
THE CYANOBACTERIA Microcoleus sp.
BOTTOM OF ERLENMEYER FLASK
CYANOBACTERIA COLONIES
ROOTS
Toledo et al. 1995. In vitro colonization and
increase in nitrogen fixation of seedling roots
of black mangrove inoculated by a filamentous
cyanobacteria. Canadian Journal of Microbiology
411012-1020
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COLONIZATION OF MANGROVE ROOTS (in vitro) BY THE
CYANOBACTERIA Microcoleus sp.
Root surface
100 ?
Toledo et al. 1995. In vitro colonization and
increase in nitrogen fixation of seedling roots
of black mangrove inoculated by a filamentous
cyanobacteria. Canadian Journal of Microbiology
411012-1020
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COLONIZATION OF MANGROVE ROOTS (in vitro) BY THE
CYANOBACTERIA Microcoleus sp.
10 ?
Root surface
Toledo et al. Can. J. Microbiol. 1995
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Nursery-reared black mangrove
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Measuring the current in the reforested area
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Strategic site was found, a shallow channel
drained both deforested areas
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Exit of channel from reforested site
Inner lagoon
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The reforested site is located in the main
drainage channel in the two deforested
areas. Once the trees grow, we hope that their
foliage, submerged in the water at high tide,
will trap floating propagules and allow more
trees to grow in the area.
Reforested area
Sand dune
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Reforestation at low tide
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Reforesting the strategic area
The site was protected from beach visitors by a
deep trench filled with soft silt
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At planting
One day later. Passing the first tides under
field conditions
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One year later
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Two years later
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(No Transcript)
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Four and more years later

• The reforested area accumulated organic debris
  and trapped floating propagules
• This allows establishment of floating propagules
  in the area
• Consequently, the reforested area gained many
  more new trees than we planted

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In 1995, general view of one deforested area
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In 2006, general view of reforested area
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Ground view of deforested area in 1995
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Ground view of reforested area in 2006
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General view of the second deforested areas in
1995
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In 2006, general view of the same area after
reforestation
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Wildlife returns to the reforested areas
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Wildlife returns to the reforested areas fish,
the major economic contribution of mangroves
Juvenile fish
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Fully reforested areas are returned to public
recreation activities
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• Photographed by Yoav Bashan
• Presentation by
• Juan Pablo Hernandez