| Citation |
IUCN SSC Amphibian Specialist Group 2018. Platymantis lawtoni. The IUCN Red List of Threatened Species 2018: e.T58463A58480214. http://dx.doi.org/10.2305/IUCN.UK.2018-1.RLTS.T58463A58480214.en. Downloaded on 14 May 2019. |
Description |
Geographic Range
NATIVE
Extant (resident)
Philippines
NUMBER OF LOCATIONS
2
UPPER ELEVATION LIMIT
1,200 metres
LOWER ELEVATION LIMIT
300 metres
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)
3541.15
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 occurs in the rainforests of Tablas and Sibuyan Islands in the Philippines at elevations between 300–1,200 m asl (Siler et al. 2012, Philippines Red List Assessment Workshop May 2017). In the previous assessment the species was recorded as occurring on Romblon Island, however there are no records of the species there to date despite surveys there (Siler et al. 2012, Philippines Red List Asssessment Workshop May 2017). Its extent of occurrence (EOO) is 3,541 km2 and all individuals are considered to occur at two threat-defined locations.
Population
CURRENT POPULATION TREND
Decreasing
NUMBER OF MATURE INDIVIDUALS
POPULATION SEVERELY FRAGMENTED
Unknown
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
During surveys on Sibuyan in 2014, the species was found to be abundant (Mallari et al. 2014). However, due to ongoing decline in the extent and quality of habitat, the population is suspected to be decreasing.
Habitat and Ecology
SYSTEM
Terrestrial
HABITAT TYPE
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 arboreal microhabitats in lower montane and lowland forests. Individuals were often collected among branches of ferns in both primary and secondary forest, and found on saplings and trees 1-6 m above the ground (Siler et al. 2012). Individuals were also observed calling 1-20 m apart, and its advertisement call is described by Siler et al. (2012). It breeds by direct development.
CLASSIFICATION SCHEME
Habitats Suitability Major importance
1. Forest 1.5. Forest - Subtropical/Tropical Dry Suitable Yes
1.6. Forest - Subtropical/Tropical Moist Lowland Suitable Yes
1.9. Forest - Subtropical/Tropical Moist Montane Suitable Yes
Threats
Agriculture & aquaculture
Annual & perennial non-timber crops
Energy production & mining
Mining & quarrying
Biological resource use
Logging & wood harvesting
Threats in detail
THREATS
The subpopulation on the smaller islands of Tablas is particularly threatened by continuing habitat loss due to small-scale logging, conversion of lowland rainforest to agricultural land, and marble quarrying (Philippines Red List Assessment Workshop May 2017). On Sibuyan, massive deforestation was observed caused by collection for firewood and charcoal making, in addition to widespread artisanal gold mining (Philippines Red List Assessment Workshop May 2017).
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
Low Impact: 3
2.1.2. Small-holder farming Ongoing
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation
Low Impact: 3
2.1.3. Agro-industry farming Ongoing
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation
Low Impact: 3
3. Energy production & mining 3.2. Mining & quarrying Ongoing
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation
Low Impact: 3
5. Biological resource use 5.3. Logging & wood harvesting 5.3.5. Motivation Unknown/Unrecorded Ongoing
1. Ecosystem stresses 1.2. Ecosystem degradation |
