2)
Protection from waves during extreme storm events
– nurseries set
up during the non-typhoon season may be destroyed when storms
come.
3)
Relatively flat, with firm substrate and well-drained
(not waterlogged).
4)
Under the shade of mangrove/other trees
– but should avoid
insects (e.g., larvae from talisay leaves falling on mangrove
seedlings).
5)
Proximity to the planting site
(for backyard nurseries, to reduce
transport costs).
6)
Preferably
close to a freshwater supply.
7)
Preferably
close to seed/propagule sources.
FIG. 6.
Small-scale CMRP nurseries (shaded by mature trees) are
readily accessible because of their backyard location, as in
Ajuy, Iloilo
15
B.
Preparation for Field Collection
•
Prior to the fieldwork
1)
Consult commercial calendars (with tide levels coded in red or
blue color) or a tidal calendar (Fig. 7) to select a suitable date
and time.
FIG. 7.
A tidal calendar that shows the time and height of tides for Iloilo
station in January 2011.
Nursery
2)
Collectors (volunteers/PO members) should prepare the
following: appropriate clothes (longsleeved shirts, hats), rubber
shoes/booties (Fig. 8).
16
Community-based Mangrove Rehabilitation Training Manual
3)
Prepare logistics and materials
➤
transportation, snacks, certificates for volunteers
➤
seedling polybags
⦿
8 x 12”
(20 x 30.5 cm)
for wildings
⦿
4 x 6”
(10 x 15 cm)
for seeds
➤
shovels or digging blades (tagad)
•
On the day of field work:
4)
Give a brief orientation
to the volunteers about nurseries, e.g.
their importance, site requirements, and divide them into groups
of seed/wilding collectors, baggers and haulers.
5)
For better supervision,
a ratio of one supervisor or facilitator
(ZSL/project staff): 15-20 participants is recommended
(Fig. 9).
More than this will mean some volunteers may be unsupervised
and apply wrong practices, e.g., throwing – instead of carefully
carrying – the bagged seedlings, thereby causing higher
mortality.
FIG. 8.
Requirements for mangrove planting activity: cap, long-
sleeved shirt, long pants and booties/thick socks for footwear,
and digging blades.
17
FIG. 9.
Mangrove outplanting: a) briefing volunteers, b) marking rows
of 1-1.5 m distance for staking and making holes, c-f) removing
seedling from polybag, placing inside hole, levelling soil surface,
and tying seedling to stake.
C.
Collection and Bagging of Wildings
Wildings (also spelled wildlings) are often observed near mother trees,
retained by mangrove roots (seedling bank), and dikes of abandoned
ponds, or caught on the beach strand (Fig. 10). The latter are short-
lived because of wave exposure, in contrast to those trapped by roots
or along the dikes of ponds, which remain undisturbed and grow to
one meter or more.
1)
Collect wildings not more than
40 cm, preferably 10-30 cm
tall
(with at least
6 leaves
).
2)
Use a shovel or digging blade (Fig. 8) to
carefully remove the plant
with soil still attached to the roots
to ensure they are surrounded
by a ball of earth (Fig. 11).
