000			028880000a22004690004500
911			_aXL1996502631
901			_aF40
903			_aE
903			_aV
904			_aBCO
905			_aC
906			_a19960101
908			_aJ
909			_aAS
912			_aEn
912			_aEn
914			_aBCO1
914			_aINFOR
914			_aBN
082	0	4	_a24718
100	1		_981430 _aJohnston, M.
100	1		_971798 _aGillman, M.
260			_c1995
041	0		_aEn
500			_a6 ilus. 7 tab. 25 ref. Sum. (En)
520			_aStudies were undertaken on the floristic composition and stand structure of four 1 hectare plots in the lowland forests of Kurupukari, Guyana. A total of 3897 trees, covering 153 species and 31 plant families were recorded at greater than 5 cm diameter at breast height (dbh). The number of species per hectare ranged from 61 to 84 (> 5.0 cm dbh) and 50-71 (> 10.0 cm dbh). The total number of trees per hectare varied two/fold between study plots, with 45-50 percent of the trees within the 5-10 cm size/class. Mean total basal area varied from 32.39-34.63 m2 per 100 m2. The four most dominant plant families represented 43.8 percent of the total number of trees, while representing only 11.2 percent of the species. No one plant family dominated in more than one of the four study plots, and all four plots held at least one plant family with more than 20 percent of the total number of trees. Although 14 tree species were common to all four plots, only 26 percent/35 percent of the species were represented by a single tree. Between three and seven species represented 50 percent of the trees within all size/classes, with species dominance occurring within the highest density plot. These tropical forest types of central Guyana may represent some of the lowest diversity forests in the neotropics, whereby the total number of tree species is relatively limited, typically with six dominant canopy species, but the relative abundance of these species is highly variable between the forest types. Mechanisms influencing the competitive interactions associated with species dominance are discussed in relation to the importance of mycorrhizae and the persistence of species dominance.
650	1	4	_9141423 _aCOMPOSICION BOTANICA
650	1	4	_9146971 _aESTRUCTURA DEL BOSQUE
650	1	4	_9143732 _aDENSIDAD DE LA POBLACION
650	1	4	_925479 _aGUYANA
691			_9308379 _aBOTANICAL COMPOSITION
691			_9332806 _aPOPULATION DENSITY
691			_925479 _aGUYANA
692			_aCOMPOSITION BOTANIQUE
692			_aDENSITE DE POPULATION
692			_aGUYANA
773	0		_tBiodiversity and Conservation (RU) _d1995 _gv. 4 p. 339-362
040			_aCR-TuBCO _cCR-TuBCO _bEs
245	1	0	_aTree population studies in low-diversity forests, Guyana; 1: Floristic composition and stand structure
942			_cANA
003			CR-TuBCO
999			_c58197 _d58197