Development of mangrove forest ecosystem by regeneration

The topic of scientific and technological research on 'Experimental research on the delineation of Mui Ca Mau National Park's mangrove forest' carried out by the Department of Biodiversity Conservation, General Department of Environment It is necessary to apply replication to similar ecological regions.

The model is based on 100% of natural regeneration trees, accelerating the process of forest formation, saving the cost of planting coastal mangroves.

Based on the criteria of the project, the Department of Biodiversity Conservation selected the mudflats of Mui Ca Mau National Park to build a forest regeneration model, belonging to IB sub-zone.1 Dat Mui commune, Ngoc Hien district.

The method of creating is by covering the banks of dikes with ladles to establish a system of sea waves. Time to build the model in October 2010, before the fall of the mangrove forest (mainly white mangrove and mangrove trees).

The model is constructed with two main parts: the area on the dyke and the area in the dyke. The part of the control area is not covered by dykes from the existing forest to the outside of the mudflats.

Experimental models have yielded very positive results. Specifically, on the embankment area of ​​regenerated areas, regenerated trees with very high density and increase strongly from the 3rd month to the 12th month.

Mui Ca Mau National Park.(Photo: Vo Thanh Tra / VNA)

In terms of species composition, there are only two species of regeneration in the model are white mangrove and mangrove trees. In it, the white fish sauce dominates absolutely. After 24 months, the average diameter of the regenerated mangrove forest on the shore reaches 4.8cm, height 2.4m.

After 12 months of zoning (two fall seasons), the ratio of density of regenerated trees in the dyke of the zoned area is much lower. Caused by the effects of the tidal regime, the land inside the flat dike should be deeply submerged, making it difficult for mangrove tree seeds to be fixed to germinate.

But after 24 months of delineation (three fall seasons), the density of regenerated trees in the dyke increases dramatically thanks to the effects of the dyke, which reduces the waves and helps stabilize the soil structure inside the dyke, creating so 'brackets' for mangrove trees are fixed and developed.

As for the control area, the mudflats have natural conditions, similar environment and adjacent to the area of ​​building zoning model, but there are huge differences in density, regeneration and speed. growth.

The density here is only 820 trees / ha compared to the artificial area of ​​13,260 trees / ha in the dyke, 41,455 trees / ha above the dyke bank. The height of the control plant is also lower than that of the zone.

This shows that the model of delineated mangrove forests in Mui Ca Mau National Park has brought positive results, helping the number, density, growth and development of mangrove regeneration trees. At the same time, it increases the sedimentation speed and the ability to form very high forests.

The success of the model has expanded the area of ​​mangrove forests, creating habitat for plants and animals, creating habitat for migratory waterbirds . increasing the number of animals, plants.

Besides, the formation of forests from the model of zoning helps to increase the protection capacity, prevent erosion, create landscape environment, regulate climate, clean water sources. It is possible to limit toxic substances caused by waterway traffic, waste water from aquaculture, and domestic wastewater.

The success of this model is also expected as a solution to mitigate the effects of climate change on Mui Ca Mau National Park - which is sensitive and vulnerable to rising temperatures and rising sea levels. The current.