tailieunhanh - Báo cáo khoa học: "Assessing vegetation changes in the dry deciduous Ainurmarigudi Reserve Forest, South India"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: "Assessing vegetation changes in the dry deciduous Ainurmarigudi Reserve Forest, South India. | 449 Ann Sci For 1995 52 449-464 Elsevier INRA Original article Assessing vegetation changes in the dry deciduous Ainurmarigudi Reserve Forest South India A Gaulier1 JP Pascal 2 JP Puyravaud 3 École nationale du génie rural des eaux et des forets formation des ingénieurs forestiers 54042 Nancy 2 URA CNRS 243 université Claude-Bernard Lyon I 62622 Villeurbanne France 3 Institut frangais de Pondichéry 605001 Pondicherry India Received 29 June 1994 accepted 9 January 1995 Summary The dry deciduous forest of Ainurmarigudi belonging to Anogeissus latlfolia - Tectona gran-dis - Terminalia alata type was classified as a reserve forest under the Project Tiger in 1973. Twenty years later although felling has not been resumed fires still occur regularly and the density of herbivores has increased considerably. This article attempts to determine the impact of 15 years 1978-1993 of total protection on the evolution of the stand from studies on the floristic and spatial structures mortality recruitment and regeneration. The stand is still open and deficient in young individuals except for the population of Grewia tiliifolia . All the species do not evolve in the same manner. Tec-tona grandis and Dalbergia latifolia have serious problems of regeneration. In contrast Grewia tiliifo-lia whose recruitment is impressive does not seem to be capable of establishing itself in the adult stage. From the point of view of regeneration the only species which appears to maintain itself in the forest is Anogeissus latifolia. Establishment of the reserve has thus led to the opening up of the stand as well as a fall in its biomass and also a slight decline in its tree diversity. The increase in the populations of big herbivores probably plays a major role in this evolution. effect of total protection forest structure I mortality regeneration tropical deciduous forest elephant pressure fire India Resume Impact de la mise en reserve sur la foret décidue sèche d Ainurmarigudi dans la reserve du .