Tangile (Shorea polysperma)
Also known as: Tangile red meranti · Philippine mahogany (trade grouping) · Tiaong (sometimes applied to related Shorea timber groups in trade)
Definition
Tangile (Shorea polysperma) is a large endemic Philippine tree in the dipterocarp family (Dipterocarpaceae), harvested historically as one of the principal species marketed as “Philippine mahogany.” Its reddish timber was a mainstay of the country’s logging era, and because decades of exploitation have reduced mature stands, the species is assessed as Critically Endangered by international conservation authorities. (Wikipedia)
Identities
| Source Type | Identity |
|---|---|
| Wikipedia | Shorea polysperma |
| Wikidata | Q5490734 |
| DBpedia | N/A |
| ProductOntology | N/A |
| Wiktionary | N/A |
| Library of Congress Subject Headings (LCSH) | N/A |
| MeSH | N/A |
| NCBI Taxonomy | Shorea polysperma |
| AGROVOC | Shorea |
| Google Scholar | Shorea polysperma tangile dipterocarp Philippines critically endangered timber |
| ConceptNet | tree |
| OpenCyc | N/A |
Also Known As
- Tangile red meranti
- Philippine mahogany (trade grouping)
- Tiaong (sometimes applied to related Shorea timber groups in trade)
Examples and Analogies
- The cathedral trees of Luzon’s lowlands: Old-growth tangile, like other Philippine dipterocarps, emerged 40–60 meters over the canopy — forest architecture comparable to cathedrals, which is precisely why loggers prized the first, biggest cuts.
- A cautionary ledger: Tangile’s fall from dominant timber species to Critically Endangered organism is the dipterocarp story in miniature: commerce outran regeneration by generations.
Usage Scenarios
1. Historical Timber Production
Tangile wood went into furniture, interior joinery, veneer, and construction, exported and domestically consumed under the Philippine mahogany label.
2. Conservation and Restoration Forestry
Remaining stands and seed sources now anchor protected-area management and native-species reforestation projects aiming to restore lowland dipterocarp forest.
Strategies
- Conservation emphasizes protecting remaining mature trees as mother trees, since dipterocarps fruit irregularly in mast years and seed is short-lived.
- Reforestation programs collect wildlings during masting events and raise seedlings in nurseries for enrichment planting in degraded lowland forests.
Security and Safety Measures
- Logging controls under national forestry law restrict cutting of threatened Shorea species, and transport permits help interdict illegally sourced timber.
- Fire prevention around residual forests protects regeneration, as dipterocarp seedlings are fire-sensitive.
Historical Context
Tangile belonged to the great lowland dipterocarp forests that cloaked Luzon, Samar, Leyte, and Mindanao before the twentieth-century logging boom. Together with lauan, apitong, and yakal, it powered the Philippines’ once-mighty timber-export economy from the postwar decades into the 1980s, when concession logging peaked and then declined as forests shrank and bans took hold. As mature tangile became scarce, scientific assessments moved the species into the threatened categories, and its story shifted from commodity catalog to red list — emblematic of the country’s forest transition.
Challenges and Controversies
Survival Versus Livelihoods
Restricting harvest of an endangered timber affects communities long dependent on wood processing, requiring livelihood alternatives alongside protection.
Regeneration Uncertainty
Irregular masting and habitat fragmentation make natural recovery slow, so debate continues over how much active restoration versus strict protection depleted tangile stands need.
Related Topic
White Lauan