Nitrogen-fixing legumes and silvigenesis in a rain forest in French Guiana:: a taxonomic and ecological approach

被引:18
作者
Roggy, JC
Prévost, MF
机构
[1] INRA, Stn Rech Forestieres, SILVOLAB Guyane, F-97387 Kourou, France
[2] ORSTOM, Ecol Vegetale Lab, SILVOLAB Guyane, F-97323 Cayenne, France
关键词
functional groups of species; legumes; nodular structures; N-2; fixation; taxonomy;
D O I
10.1046/j.1469-8137.1999.00523.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The nodulation status and nodule morphology of 62 taxa of Leguminosae in a rain forest in French Guiana are reported according to the taxonomy of the family. The N-2-fixing species are then fitted into 'functional groups' according to their behaviour towards illumination, in order to evaluate their importance in the global dynamics of the stand. The results showed that 67% of the observed species were nodulated (50, 71 and 77% of the Caesalpiniacea, Mimosaceae and Papilionaceae, respectively). In the Caesalpiniaceae, nodule-like structures were reported in the genus Crudia and in the species Senna quinquangulata, although this needs to be confirmed. All the nodules studied in this subfamily were astragaloid and mucunoid, In the Mimosaceae, the ability of a new genus (Balizia) to form nodules was reported, as well as nodulation on aerial roots in Inga stipularis. The nodules studied a ere mainly mucunoid. In the Papilionaceae, nodulation on aerial roots in Poecilanthe hostmannii and on conventional roots of the genus Paramachaerium were reported fur thr first time. All types of nodular structures were found in this subfamily but the structures were quite uniform at the tribal level. These are consistent with suggestions that nodule morphology has a taxonomic value. Eight functional groups of N-2-fixing species are proposed, ranging from light dependance to shade tolerance. These results indicate the important role played by N-2-fixing species in the global dynamics of the stand and that N inputs by N-2 fixation were continuous along the gradient of energetic resources that characterizes the silvigenetic process. The interactions between the photosynthetic capacities of the species and the ability to fix N-2 in low light conditions are discussed.
引用
收藏
页码:283 / 294
页数:12
相关论文
共 81 条
[1]   DIVERSITY OF STEM NODULATION SITES IN AESCHYNOMENE SPP [J].
ALAZARD, D ;
DUHOUX, E .
JOURNAL OF PLANT PHYSIOLOGY, 1988, 132 (01) :123-125
[2]  
Allen O. N., 1981, The Leguminosae. A source book of characteristics, uses and nodulation.
[3]  
[Anonymous], 2000, ADV LEGUME SYSTEMATI
[4]  
[Anonymous], BOIS FOR TROP
[5]  
BARNEBY RC, 1996, MEMOIRS NEW YORK BOT, V74
[6]  
BIRNBAUM P, 1997, THESIS U PARIS 6 FRA
[7]  
BLANC P, 1989, THESIS U PARIS 6 FRA
[8]  
BOGAN J, 1997, CHECKLIST PLANTS GUI
[9]  
BOTKIN B, 1993, FOREST DYNAMICS ECOL
[10]  
BOULET R, 1990, MISE VALEUR ECOSYSTE, P15