19 4 1999 12, No14 Vol119 TROPICAL GEOGRAPHY Dec., 1999,,, ( 610650) :,, 1200 m 2, 62, 32 54,, 32, - 21, 7, 2,, 115m 52 1857,, 100 m 2 185,,, 4, 017 019, 0107 0110,,, : ; ; : Q94813/ 15 : A : 1001-5221 (1999) 04-0312 - 06,,,, 1, 22 45, 112 51, 2116,, 1 990 mm,,, 4 9, 80 %,,,, 3113 %,, ph 3179 1012,, 5917 2 417 hm 2, ( Bambusa lapidea), 3 20 m 20 m [1], 4 10 m 10 m, 115m,, 12 5 m 5 m 1 m 1 m, ( 015 115 m) ( 015 m) ( : 1998-12 - 11 ; : 1999-07 - 13 : (1966 - ),,,, 3,,,,.,.
4 : 313, ) 1994 5 3 311 31111,, 1 200 m 2, 62, 54 32, 30 52 60, 1 ( 1) 1 1200 m 2 Aspidiaceae 1 1 Gnetaceae 1 1 Annonaceae 3 3 Lauraceae 3 5 Thymelaeaceae 1 1 Proteaceae 1 1 Theaceae 1 1 Myrtaceae 1 2 Melastomaceae 1 2 Elaeocarpaceae 1 1 Sterculiaceae 1 1 Euphorbiaceae 4 4 Rosaceae 2 2 Mimosaceae 1 1 Papilionaceae 2 2 Ulmaceae 1 1 Moraceae 2 2 Aquifoliaceae 1 1 Celastraceae 1 1 Santalaceae 1 1 Rutalaceae 2 3 Burseracae 1 1 Meliaceae 1 1 Alangiaceae 1 1 Araliaceae 1 1 Sapotaceae 1 1 Myrsinaceae 3 4 Symplocaceae 1 2 Oleaceae 1 1 Apocynaceae 1 1 Rubiaceae 10 11 Verbenaceae 1 1 32 54 62,, 20, 6215 %; 45, 8313 % [2] (gengeric coefficient, ) 8313 %, ( 212 %, 211 %, 211 %) [3] 31112 [4], 53 [5], ( 2), 3410 % 2614 % 1818 %, 2 62, 32, 5116 %, 21, 3319 %, 7, 1113 %, 2, 312 %, (Endospermum) (Microdesmis) (Aporosa), (Machilus) (Cryptocarya), (Ca2 narium), (Abarema), (Artocarpus) (Ficus), ( Sterculia ), (Dysoxylum), (Canthium) ( Ixora) (Mussaenda) (Pavetta) (Randia) (Tricalysia), ( Kop2 sia), (Maesa), (Uvaria) (Desmos) ( Fissistigma), (Aquilaria), (Memecylon), (Chrysophyllum), (Dendrotrophe), (Abrus) (Dalbergia)
3 14 19 2 / % 1. 0-2. 18 3410 3. 1 119 4. 14 2614 5. 5 914 6. 2 318 7. 10 1818 8. 2 318 9. 1 119 10. 0 0 11. 0 0 12. 0 0 13. 0 0 14. 0 0 15. 0 0 53 100 ( Mussaenda pubescens ) ( Gmetum 312 montanum) ( Dalbergia hancei), 31211,, ( Endospermum chi2, ( Psychotria serpens) (Lemmaphyllum microphyllum), nense),,, ( Helicia cochinchinensis) (Canarium album), ( Artocarpus styraci2 folius ) 31212,,,, 3 4 m,, 19 22 m, 26 ( Ficus variegata var. chlorocarpa m, F. fistulosa ) Raunkiaer [5], ( 3),,, 29, 016 ; 9 18 m, 16 18 m, 6415 %,, 67,, 015 ; Ranukiaer [5], ( 4), 31, 50 %,, 14, 2216 % 3 (1200 m 2 ) 19 21 16 1 5 62 % 3016 3319 2518 116 811 100 4 (1200 m 2 ) 7 6 31 18 - - 62 % 1113 917 5010 2910 - - 100,,,,, ( Dendrotrophe frutescens) 9 m,,
4 : 315, 95 % 115m,,, 100 m 2 185, 70 %, 5 52 1857 4103 0107 0190 44 554 4101 0110 0173 22 85 3197 0107 0189,,, 313 31311 ( h, 30 % 33cm; h > 33cm, dbh 215cm; 31213 215cm < dbh 715cm; 715cm, < dbh 2215cm; dbh > 2215cm, h, Shannon - Wiener, Simposn SW Pielou [6,7] ( 5),,,, [7],, (Source),, dbh ),, [8] 1, 0,,,,,,,, 31312 / 1
3 16 19 : 2/ ( N - 1) T, T = [ ( / n) - 1 ] / 2/ ( N - 1), X 2 = ( / n) ( N - 1), N - 1 95 %, = 6 N ( n i - n) 2 / ( N - 1), n = 6 N 12 10 m 10 m n i / N i =1 i =1 10 / 1 200 m 2 24 ( i = 1,2,, N) 1 ( 6), N, n i, t - X 2 -, 6 3 [10],, (n 10/ 1200 m 2 ) / n T T X 2 X 2 Helicia cochinchinensis 1190 2111 p 20190 c Endospermum chinense 1108 0119 p 11188 p Elaeocarpus sylvestris 1167 1157 p 18137 p Machilus chinensis 2169 3196 c 29159 c Litsea elongata 2124 2191 c 24164 c Artocarpus styracifolius 12150 26197 c 137150 c Sterculia lanceolata 2147 3145 c 27117 c Symplocos dolichotricha 8171 18108 c 95181 c Gironniera subaequalis 11105 23157 c 121155 c Kopsia lancibracteolata 17121 38102 c 189131 c Psychotria rubra 20183 46151 c 229113 c Microdesmis caseariaefolia 9130 19147 c 102130 c Ardisia quinquegona 11128 24111 c 124108 c Fissistigma glaucescens 5152 10160 c 60172 c Randia acuminatissima 8192 18157 c 98112 c Uvaria microcarpa 8103 16149 c 88133 c Desmos chinensis 3119 5114 c 35109 c Tricalysia dubia 2126 2172 c 24186 c Aporosa chinensis 5181 11128 c 63191 c Ficus hirta 1142 0198 p 15162 p Acronychia pedunculata 3121 5118 c 35131 c Schefflera octophylla 3135 5151 c 36185 c Aquilaria sinensis 5125 9197 c 57175 c Ilex asprella 1172 1169 p 18192 p 3 P - (Poission) ; C - (Clump) ; : t 0195,11 = 21201; X 2 0195,11 = 1917 4,, 50,,
4 : 317 40,, -,,,,,, : [1],,. [J ]., 1982, 6 (1) : 51 60. [2]. [J ]., 1979, 34 (3) : 224 237. [3]. [A].. [ C]. :, 1992. 109 122. [4]. [J ]., 1979, 1 (1) : 1 22. [5] D Mueller - Dombois, H Ellenberg,. [M]. :, 1986. 90 111. [6]. [A].,. [ C]. :, 1994. 141 165. [7]. [M]. :, 1996. 84 98. [8],,. [M]. :, 1995. 8 14. [9]. [J ]., 1988, (1) : 28 39. [10],. [A].. [ C]. :, 1984. 24 37. AN ANALYSIS OF THE COMMUNITY OF SECONDARY EVERGREEN BROAD - LEAF FOREST IN LONGKOU, HESHAN CAO Hong2lin, CAI Xi2an, PENG Shao2lin, Yu Zuo2yue ( South China Institute of Botany, Academia Sinica, Guangzhou 510650, China) Abstract : The secondary monsoon evergreen broad - leaf forest at a village of Longkou Town, Heshan City, Guangdong, located at the south edge of sub - tropical zone, is a community of Helicia cochinchinensis, En2 dospermum chinense, Machilus chinensis and Gironniera subaequalis. A 1 200 m 2 plot of the community con2 sists of 32 families, 54 genera and 62 species, of which 32 species are tropical elements, 21 pan - tropical and 7 sub - tropical, and the others are extensive species. An evergreen appearance and complicated vertical structure are found in the community. There are 1 857 tree individuals which are over 115 m in height in the plot, and 185 shrub individuals in the 100 m 2 plot. Most herb species are offspring of trees and shrubs, the true grasses are few. The organization structure of the community is similar to that of the zonal vegetation. The Shannon - Winner index is about 4, the community evenniss 017 019 and Simpson ecological dominance 0107 0110. Most of the dominant population of the community are of clump distribution. The community would evolve toward the climax vegetation with human disturbance reducing. Key words : Evergreen broad - leaf forest ; Secondary forest ; Community analysis