Variations in precipitation and the equilibrium dynamics of a tropical forest tree community in south-eastern Brazil

被引：0

作者：

Abm S. ^{[1
]}

Wac C. ^{[1
]}

Jd M. ^{[1
]}

de Souza C.R. ^{[1
]}

dos Santos R.M. ^{[1
]}

Tmc S. ^{[1
]}

Map F. ^{[1
]}

da Silva K.G. ^{[1
]}

机构：

[1] Departamento de Ciências Florestais, Universidade Federal de Lavras, Campus Universitário, Lavras

来源：

Abm, Santos (alissonborges@globomail.com) | 2018年 / Forest Research Institute Malaysia卷 / 30期

关键词：

Climate changes; Forest dynamics; Fragment; Rhythmic cycle; Semidecidual seasonal forest; Temporal changes;

D O I：

10.26525/JTFS2018.30.4.597605

中图分类号：

学科分类号：

摘要：

Tropical forests are dynamic communities where stochastic and unpredictable events such as climate change affect key ecological processes. The objective of this study was to describe the dynamic behaviour of a semideciduous seasonal forest during 15 years of monitoring, with four sampling intervals, in order to verify if fluctuations in forest dynamics are related to precipitation variations. The work was carried out based on diameter at breast height measured in 25 plots of 400 m2 each in four forest inventories (2000, 2005, 2009, 2015). To evaluate the direction of forest dynamic changes over time, we performed analyses of mortality rates, recruitment and net changes in number of individuals and rates of loss and gain in basal area. The results suggested that the forest was undergoing a rhythmic cycle characterised by the imbalance in forest dynamics, with rates of mortality and gain in basal area greater than those of recruitment and loss in basal area respectively. However, this natural cycle may be influenced by variation in precipitation, since in the periods characterised as dry, mortality rates increased and there was less increment in basal area. © Forest Research Institute Malaysia

引用

页码：597 / 605

页数：8

共 50 条

[1] Alvarenga L., Precipitação no sudeste brasileiro e sua relação com a Zona de Convergência do Atlântico Sul, Revista Agrogeoambiental, 4, pp. 1-7, (2012)
[2] Bonal D., Burban B., Stahl C., Wagner F., Herault B., The response of tropical rainforests to drought—lessons from recent research and future prospects, Annals of Forest Science, 73, pp. 27-44, (2016)
[3] Botrel R., Oliveira Filho A.T., Rodrigues L.A., Curi N., Influência do solo e topografia sobre as variações da composição florística e estrutura da comunidade arbóreo-arbustiva de uma floresta estacional semidecidual em Ingaí, MG, Revista Brasileira De Botânica, 25, pp. 195-213, (2002)
[4] Cavalcanti I.F.A., Large scale and synoptic features associated with extreme precipitation over South America: A review and case studies for the first decade of the 21st century, Atmospheric Research, 118, pp. 27-40, (2012)
[5] Coelho C.A.S., Cardoso D.H.F., Firpo M.A.F., A seca de 2013 a 2015 na região sudeste do Brasil, Revista Climanalise, pp. 55-66, (2016)
[6] Coelho C.A.S., Oliveira C.P., Ambrizzi T., Et al., The 2014 southeast Brazil austral summer drought: Regional scale mechanisms and teleconnections, Climate Dynamics, 46, pp. 3737-3752, (2016)
[7] Corlett R.T., The impacts of droughts in tropical forests, Trends in Plant Science, 21, pp. 584-593, (2016)
[8] Dantas A.A.A., Carvalho L.G., Ferreira E., Climatic classification and tendencies in Lavras region, MG, Ciência E Agrotecnologia, 31, pp. 1862-1866, (2007)
[9] Dobbertin M., Tree growth as indicator of tree vitality and of tree reaction to environmental stress: A review, European Journal of Forest Research, 124, pp. 319-333, (2005)
[10] Doughty C.E., Metcalfe D.B., Girardin C.A.J., Et al., Drought impact on forest carbon dynamics and fluxes in Amazonia, Nature, 519, pp. 78-82, (2015)

← 1 2 3 4 5 →