| Citation |
IUCN SSC Amphibian Specialist Group 2018. Platymantis subterrestris. The IUCN Red List of Threatened Species 2018: e.T17558A58474743. http://dx.doi.org/10.2305/IUCN.UK.2018-2.RLTS.T17558A58474743.en. Downloaded on 14 May 2019. |
Description |
Geographic Range
NATIVE
Extant (resident)
Philippines
NUMBER OF LOCATIONS
1-4
UPPER ELEVATION LIMIT
2,200 metres
LOWER ELEVATION LIMIT
1,700 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)
4235.15
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 is found in a few localities of the central cordilleras, on northern Luzon Island in the Philippines, between 1,700–2,200 m asl (A. Diesmos pers. comm. March 2018). It might also occur on Mount Polis and Mount Pulog, and may be found more widely within the central cordilleras on Luzon than currently mapped (A. Diesmos pers. comm. March 2018). The extent of occurrence (EOO) of its current known range is 4,235 km2 and it is thought to occur in fewer than five threat-defined locations.
Population
CURRENT POPULATION TREND
Decreasing
NUMBER OF MATURE INDIVIDUALS
POPULATION SEVERELY FRAGMENTED
No
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
It is quite rare at type locality (Mount Data), but in other sites with good forest cover it can be common (A. Diesmos pers. comm. March 2018). The number of mature frogs likely to occur at the type locality (Mount Data) falls within the range of 100–300 individuals. However, it has been found in other localities away from Mount Data, and so the total population of the species is not as small as was once thought. 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 mossy and montane rainforests. It breeds by direct development, presumably in shrub layer vegetation. It does not tolerate habitat disturbance (A. Diesmos pers. comm. March 2018).
CLASSIFICATION SCHEME
Habitats Suitability Major importance
1. Forest 1.9. Forest - Subtropical/Tropical Moist Montane Suitable Yes
Threats
Residential & commercial development
Housing & urban areas
Commercial & industrial areas
Agriculture & aquaculture
Annual & perennial non-timber crops
Energy production & mining
Mining & quarrying
Biological resource use
Logging & wood harvesting
Pollution
Agricultural & forestry effluents
Threats in detail
THREATS
The most important threat to this species is the continued loss of montane forests in the cordilleras due to conversion of habitat to vegetable farms, quarrying, mining of mineral resources, and real estate development. Pollution from agricultural pesticides, which are intensively used to maintain vegetable farms, is likely to be a major factor in the loss of some subpopulations of this species from the remaining montane forests at the type locality.
CLASSIFICATION SCHEME
Threats Timing Stresses Scope Severity Impact score Invasive species Virus
1. Residential & commercial development 1.1. Housing & urban areas Ongoing
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation
Low Impact: 3
1.2. Commercial & industrial areas Ongoing
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation
Low Impact: 3
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
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 5.3.3. Unintentional effects: (subsistence/small scale) [harvest] Ongoing
1. Ecosystem stresses 1.1. Ecosystem conversion
1.2. Ecosystem degradation
Low Impact: 3
9. Pollution 9.3. Agricultural & forestry effluents 9.3.3. Herbicides and pesticides Ongoing
1. Ecosystem stresses 1.2. Ecosystem degradation
2. Species Stresses 2.1. Species mortality |
