HELP! question about mangrove trees?

Question

How do mangroves cope with propogation?

its a question i have to have answered for an assignment... but i cant really find any info on it. can anyone help me?

Answer 1

Ecology, propagation and management: Grey mangrove grows luxuriantly in any

position in the intertidal regions of estuaries, lagoons (called kulhi in Dhivehi),

backwater etc. Though it is capable of growing in sandy soils and rocks it prefers fine

clay and alluvial soil for better performance. It is highly saline tolerant and tolerates

widest range of soil salinity. Its tolerance to aridity is also high. It can be easily

propagated by propagules and the position where it should be planted can be decided

on the basis of the distribution of species (zonation pattern) on that location.

Propagules of grey mangroves do not look like typical spindle-shaped propagules of

some other mangrove species because embryonic axis (hypocotyl) of the developing

embryo does not penetrate the seed coat. Hence, propagules of grey mangrove look

more or less like normal seeds in appearance and they are called cryptoviviparous

propagules. It is produced in large numbers and matured propagules float freely in

water and can be easily collected by hand or by a scoop net. They can also be collected

from trees. Collected propagules are soaked in brackish water for a day to facilitate

shedding of outer coat. These naked propagules are used for plantation. While

sowing, radicle (the part of plant embryo that develops into a root) side of the

propagules is lightly pushed into wet soil. Nursery raised seedlings of about 30 cm

can also be used for outplanting

http://209.85.175.104/search?q=cache:aFS...

MANGROVES - HOW DO THEY LIVE IN SALTWATER?

http://www.athiel.com/lib8/mangrove.htm

Ecology and adaptation are given here :

http://en.wikipedia.org/wiki/Mangrove#Gr...

Hope this helps ...