| Citation |
IUCN SSC Amphibian Specialist Group 2015. Leptobrachium xanthops. The IUCN Red List of Threatened Species 2015: e.T47151835A50980050. http://dx.doi.org/10.2305/IUCN.UK.2015-4.RLTS.T47151835A50980050.en. Downloaded on 09 May 2019. |
Description |
Geographic Range
NATIVE
Presence Uncertain
Viet Nam
Extant (resident)
Lao Peoples Democratic Republic
NUMBER OF LOCATIONS
1
UPPER ELEVATION LIMIT
1,500 metres
LOWER ELEVATION LIMIT
1,450 metres
UPPER DEPTH LIMIT
LOWER DEPTH LIMIT
Geographic Range in detail
ESTIMATED AREA OF OCCUPANCY (AOO) (KM²)
CONTINUING DECLINE IN AREA OF OCCUPANCY (AOO)
EXTREME FLUCTUATIONS IN AREA OF OCCUPANCY (AOO)
ESTIMATED EXTENT OF OCCURRENCE (EOO) (KM²)
1225
CONTINUING DECLINE IN EXTENT OF OCCURRENCE (EOO)
EXTREME FLUCTUATIONS IN EXTENT OF OCCURRENCE (EOO)
CONTINUING DECLINE IN NUMBER OF LOCATIONS
EXTREME FLUCTUATIONS IN THE NUMBER OF LOCATIONS
RANGE DESCRIPTION
This species is currently known only from the Dakchung Plateau of Phou Ajol Mountain, Xe Knog Province, Dakchung District, Laos, at elevations between 1,450-1,500 m asl (Stuart et al. 2012). Similar habitat contiguous with the species known locality extends into limited parts of north-western Quang Nam Province, Viet Nam and further surveys may uncover its presence there. Taxonomic reassessment of existing Leptobrachium specimens collected from adjacent parts of Laos and Vietnam has been recommended to better understand the true distribution and range of the species (B. Stuart pers. comm. Dec 2014). The species estimated extent of occurrence (EOO) is 1,225 km2, which represents only one threat-defined location.
Population
CURRENT POPULATION TREND
Decreasing
NUMBER OF MATURE INDIVIDUALS
POPULATION SEVERELY FRAGMENTED
CONTINUING DECLINE OF MATURE INDIVIDUALS
Population in detail
EXTREME FLUCTUATIONS
NO. OF SUBPOPULATIONS
CONTINUING DECLINE IN SUBPOPULATIONS
EXTREME FLUCTUATIONS IN SUBPOPULATIONS
ALL INDIVIDUALS IN ONE SUBPOPULATION
NO. OF INDIVIDUALS IN LARGEST SUBPOPULATION
DESCRIPTION
Little is known about the population of this species except that it was described from a type series of three individuals (Stuart et al. 2012). Habitat loss and disturbance are likely to be causing declines of this species in some parts of its range.
Habitat and Ecology
SYSTEM
Terrestrial, Freshwater (=Inland waters)
HABITAT TYPE
Wetlands (inland), Forest
GENERATION LENGTH (YEARS)
CONGREGATORY
MOVEMENT PATTERNS
Not a Migrant
CONTINUING DECLINE IN AREA, EXTENT AND/OR QUALITY OF HABITAT
Yes
Habitat and Ecology in detail
HABITAT AND ECOLOGY
This species inhabits wet montane evergreen forest and is associated with swift, rocky streams. The quality and extent of this species habitat is likely to be in decline due to the effects of shifting agriculture, logging, and the removal of non-timber forest products (Showler and Davidson 1998). Much of the species reproductive biology remains undocumented (Stuart et al. 2012), however it is presumed to have a free-living aquatic stage and breed in streams as do other Leptobrachium for which the reproductive strategy is recorded.
CLASSIFICATION SCHEME
Habitats Suitability Major importance
1. Forest 1.9. Forest - Subtropical/Tropical Moist Montane Suitable Yes
5. Wetlands (inland) 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls) Suitable Yes
Threats
Agriculture & aquaculture
Annual & perennial non-timber crops
Biological resource use
Logging & wood harvesting
Threats in detail
THREATS
The most immediate threat to this species is slash and burn agriculture. This is ongoing and a major cause of deforestation in the northern part of the species range (around the south border of Xe Sap National Protected Area), where large areas are cleared for the cultivation of cassava and rice, and abandoned after two to three years when soil nutrients are depleted. Logging and the removal of non-timber forest products may also affect this species: large portions of the region have been historically cleared by logging and in most accessible areas, eaglewood trees (Aquilaria sp) are lopped in search of mai dam, a valuable resin produced by the trees (Showler and Davidson 1998).
CLASSIFICATION SCHEME
Threats Timing Stresses Scope Severity Impact score Invasive species Virus
2. Agriculture & aquaculture 2.1. Annual & perennial non-timber crops 2.1.1. Shifting agriculture Ongoing
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation
2. Species Stresses 2.1. Species mortality
2.2. Species disturbance
Unknown Unknown Unknown
5. Biological resource use 5.3. Logging & wood harvesting 5.3.3. Unintentional effects: (subsistence/small scale) [harvest] Ongoing
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation
Low Impact: 3
5.3.4. Unintentional effects: (large scale) [harvest] Past, Likely to Return
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation |
