Shifts in hydrological regimes alter river flow rates and flood pulses, decrease environmental heteroge-neity and the floristic-structural complexity of associated plant communities. We tested the hypothesis that drought events affect plant community composition and structure at a small-scale within a riparian fragment towards a reduc-tion in floristic-structural complexity. The tree community was sampled in three habitats (wet, transitional and dry) and monitored in seven inventories carried out between 1991 and 2018. Hydrological variations were evaluated through annual rainfalls, river flow rates and water level data. The species richness and the detrended correspondence analysis axes were used to characterise the temporal modifications in floristic composition. Community structure was described in terms of biomass: accumulated, growth of survivors, mortality and recruitment. Generalised linear mixed models were fitted to evaluate the effects of time and environment in community. It was concluded that the climate has become drier in recent years due to declining precipitation that has affected flow rates and water levels. The floristic-structural complexity of the study fragment was maintained during the monitoring period. However, prolonged and extreme drought events displayed the potential to impact floristic-structural patterns.

Alisson Borges Miranda Santos;Vinicius Andrade Maia;Cléber Rodrigo de Souza;Natália de Aguiar-Campos;Aurélio de Jesus Rodrigues Pais;Wilder Bento da Silva;Nathalle Cristine Alencar Fagundes;Jean Daniel Morel;Rubens Manoel dos Santos

Department of Forestry Sciences,Federal University of Lavras,Campus Universitário,C.P.3037,Lavras,Brazil;Faculty of Environmental Engineering and Natural Resources,Zambeze University,Chimoio C.P.2400,Mozambique;Biological Sciences,Universidade do Estado de Minas Gerais,Unidade Ituiutaba,Av.Ant?nio Carlos 6627,Ituiutaba 31270-901,Brazil;Department of Biology,Federal University of Lavras,University campus,C.P.3037,Lavras 37200-000,Brazil

林业研究（英文版）

[1]Alisson Borges Miranda Santos;Vinicius Andrade Maia;Cléber Rodrigo de Souza;Natália de Aguiar-Campos;Aurélio de Jesus Rodrigues Pais;Wilder Bento da Silva;Nathalle Cristine Alencar Fagundes;Jean Daniel Morel;Rubens Manoel dos Santos-.Hydrological variability and long-term floristic-structural modifications in different habitats of a tropical semi-deciduous forest)[J].林业研究（英文版）,2022(03):801-811

Generalised

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