BVI-ENVIRONMENT – Depletion in mangrove population attributed to recent hurricanes

(Image source: Wikipidia)

A recent assessment of the mangrove population across the territory has found that it has been severely depleted due to last September’s hurricanes.

The assessment was done by coastal restoration ecologist Dr. Greg Moore, who said that at least 90 per cent of all of the mature red mangrove trees have been “defoliated and are dead, with very few exceptions.”

Moore’s assessment , done on mangroves in the island’s of Jost Van Dyke, Tortola, Frenchman’s Cay, Beef Island, Great Camanoe, Virgin Gorda and the Prickly Pear Islands, was sponsored by regional wildlife organisation, BirdsCaribbean.

According to a release from the Jost Van Dykes Preservation Society, based on the findings, the loss is a serious one to the BVI’s ecological system.

“The significance of this finding is that not only does it represent a serious ecological blow to the system, but the storm also took with it the flowers and fruits that we’d expect would be the next generation.”

In his recommendations, Moore, who is based at Jackson Estuarine Laboratory at the University of New Hampshire in the United States, said the mangroves – albeit being dead, should not be cut because they are still a valuable habitat for wildlife such as birds and invertebrates.

“As dead mangrove trees decompose, they release energy and return essential nutrients and carbon to the system. Mangrove’s physical structure is mainly intact and still buffers wave and storm energy, and helps hold peat and sand in place along fragile coastlines.”

The release added that mangroves also protect animals and helps trap and protect mangrove seedlings that will regenerate the forest naturally.

It said foot traffic and humans dragging timber in those areas threaten, trample, and damage fragile seedlings.

“And since it may be years before new plants mature and bear seeds to populate these areas, those established seedlings are more valuable than ever now.”

On the other hand, the release said there were some positive findings.

“Some interior sites in the BVI maintained mature trees, many of which are now flowering and will produce seed….these will be important sites for sustainable recruitment of plant stock for restoration and conservation efforts; and despite severe damage to the mature canopy, virtually every site visited had a significant understory of live, rooted seedling plants. Albeit quite young and short today, these young plants are the future of BVI’s mangroves and should be carefully protected.”

Moore is scheduled to return to the BVI later this year to continue his assessment as part of broader UK Darwin Plus-funded project.

The project will be focusing on the resilience of coastal and marine habitats being launched by Jost Van Dykes Preservation Society in partnership with the University of Roehampton (UK) and the Royal Society for the Protection of Birds.

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