Research Article

Morphological Variability of Pterocarpus erinaceus Poir. in Togo

Table 1

Biophysical characteristics of study zones and sites.

Climatic zoneEcological divisionBiophysical characteristics of the divisionSitesSite nameBiophysical characteristics of the sites
ClimateSoilsClimateSoilsGeographical details

Sudanian zone with a dry season and a raining seasonZone I: northern plains of TogoTropicalSustained cut of laterite “Dembos”Protected site: national park (NP)Oti-Kéran (OK)Sudanian with a dry season (5–6 months) and raining (5–6) with 800 to 1000 mm of rainfall per year; average temperature = 31.5°CTropical ironed soils of sustained laterite type9°55′-10°20′N 0°25′-1°00′E
Zone II: northern branch of Togo mountsMarked by Sudanian-Guinean type of altitudeStoned to rockyProtected site: national park (NP)Fazao-Malfakassa (FM)Sudanian-Guinean with a dry season(5 months) and raining (7 months) with 1200 to 1500 mm of rainfall per year; temperature raising to 15°C–40°CRed metal and sandy deep soils8°19′-9°11′N 0°36′-1°27′E

Guinean-Sudanian zone or Transition zone with a dry season and a raining seasonZone III: central plainsTropicalVery broad lateriteProtected site: wildlife reserve (WR)Abdoulaye (AB)Guinean with two dry seasons with 1200 to 1300 mm of rainfall per year; average temperature = 26.1°CSlight deep soils with clayey texture08°34′-08°46′N 01°13′-01°25′E

Guinean zone with two dry seasons and two raining seasons with equal durationsZone IV: southern zone of Togo mountsSubequatorial transitionLittle bit deep and deepRural domain (RD)Plateau Akposso (AK)Guinean with two dry seasons and two raining with 1400 to 1700 mm of raining per year; average temperature = 26.3°CLittle advanced soils of erosion9°55′-10°20′N 0°25′-1°00′E
Zone V: coastal plain of the southSubequatorial marked by a lack rain (800 mm/year in Lome)Slightly sandy and coastal alluvium. Tropical ironed soilsProtected site: wildlife reserve (WR)Togodo (TO)Guinean with two dry season (3–9) with 1000 to 1200 mm of rainfall; average temperature = 27°CClayey soils with a sandy surface.6°23′-7°N 1°23′-1°34′E