|Scientific Name:||Bruguiera parviflora Wight & Arn. ex Griffith|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Assessor(s):||Duke, N., Kathiresan, K., Salmo III, S.G., Fernando, E.S., Peras, J.R., Sukardjo, S. & Miyagi, T.|
|Reviewer(s):||Polidoro, B.A., Livingstone, S.R. & Carpenter, K.E. (Global Marine Species Assessment Coordinating Team)|
This species is widespread and common throughout its range, except at the extremities of its range such as in India where it is considered rare and locally endangered. It restricted to specific habitat or region of the estuary. It is threatened by the loss of mangrove habitat throughout its range, primarily due to extraction and coastal development, and there has been an estimated 21% decline in mangrove area within this species range since 1980. Mangrove species are more at risk from coastal development and extraction at the extremes of their distribution, and are likely to be contracting in these areas more than in other areas. It is also likely that changes in climate due to global warming will further affect these parts of the range. Although there are overall range declines in many areas, they are not enough to reach any of the threatened category thresholds. This species is listed as Least Concern.
|Range Description:||This species is found in South Asia, including Brunei Darussalam, India, Indonesia, Bangladesh, Malaysia, Myanmar, Philippines, Singapore, Thailand, Viet Nam, and Cambodia. In Australasia, it is found in Northwest Australia south to King Sound, Northeast Australia south to Pioneer River (Duke 2006), Papua New Guinea, Solomon Islands, and Vanuatu.|
Native:Australia; Bangladesh; Brunei Darussalam; Cambodia; India; Indonesia; Malaysia; Myanmar; Papua New Guinea; Philippines; Singapore; Solomon Islands; Sri Lanka; Thailand; Vanuatu; Viet Nam
|FAO Marine Fishing Areas:|
Indian Ocean – western; Indian Ocean – eastern; Pacific – western central
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is considered common throughout its range. However in India, this species was found in only 10% of 100 sampling sites (Kathiresan 2008). At the extremities of its range such as in India it is considered rare.|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||This species is found in downstream to intermediate estuarine zones in the mid-intertidal region. It is shade intolerant with a maximum porewater salinity of 66 ppt and a salinity of optimal growth of 8-34 ppt (Robertson and Alongi 1992). This is a slow-growing species that grows to 25 m height.|
|Use and Trade:||This species may be attractive to timber extraction as it grows very straight.|
Although local estimates are uncertain due to differing legislative definitions of what is a 'mangrove' and to the imprecision in determining mangrove area, current consensus estimates of mangrove loss in the last quarter-century report an approximately 21% decline in mangrove areas in countries within this species range since 1980 (FAO 2007).
All mangrove ecosystems occur within mean sea level and high tidal elevations, and have distinct species zonations that are controlled by the elevation of the substrate relative to mean sea level. This is because of associated variation in frequency of elevation, salinity and wave action (Duke et al. 1998). With rise in sea-level, the habitat requirements of each species will be disrupted, and species zones will suffer mortality at their present locations and re-establish at higher elevations in areas that were previously landward zones (Ellison 2005). If sea-level rise is a continued trend over this century, then there will be continued mortality and re-establishment of species zones. However, species that are easily dispersed and fast growing/fast producing will cope better than those which are slower growing and slower to reproduce.
In addition, mangrove area is declining globally due to a number of localized threats. The main threat is habitat destruction and removal of mangrove areas. Reasons for removal include cleared for shrimp farms, agriculture, fish ponds, rice production and salt pans, and for the development of urban and industrial areas, road construction, coconut plantations, ports, airports, and tourist resorts. Other threats include pollution from sewage effluents, solid wastes, siltation, oil, and agricultural and urban runoff. Climate change is also thought to be a threat, particularly at the edges of a species range. Natural threats include cyclones, hurricane and tsunamis.
|Conservation Actions:||There are no conservation measures specific to this species, but its range may include some marine and coastal protected areas. Continued monitoring and research is recommended, as well as the inclusion of mangrove areas in marine and coastal protected areas.|
|Citation:||Duke, N., Kathiresan, K., Salmo III, S.G., Fernando, E.S., Peras, J.R., Sukardjo, S. & Miyagi, T. 2010. Bruguiera parviflora. The IUCN Red List of Threatened Species 2010: e.T178821A7617234.Downloaded on 25 September 2017.|