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Arrested development? Investigating the role of bamboo in Araucaria Forest succession in Southern Brazil

Journal of Plant Ecology 2019年第6期12卷 1034-1046页

作者： Betina Kellermann AndréEduardo Biscaia Lacerda EMBRAPA Forestry Brazilian Agriculture Research CorporationEstrada da Ribeirakm 111Caixa Postal 319Colombo 83411-000PRBrazil

Aims Assessing the role of a dominant native bamboo species on tree species diversity and structure in the medium *** Over a 7-year period,we studied the natural regeneration of two dominant forest types in Southern Brazil(Araucaria Forest or AF;Bamboo Forest or BF)after a bamboo(merostachys skvortzovii send.)die-off between 2004 and *** study was carried out in the Embrapa Research Station in Cacador,Santa Catarina State,*** Findings The die-off provided ideal conditions for the establishment of several species and it kickstarted forest succession dynamics,which in turn affected regeneration *** species richness was relatively stable with a transitory increase between 2007 and 2014 in both AF and ***,species richness rose in BF because of a relative increase in abundance of some species(especially late and secondary species)while a plunge in some pioneer species drove an increase in ***,we found that BF has a lower diversity of recruits and that density declined over time,while AF is more diverse,with a more stable *** BF,the bamboo die-off created optimal conditions for initial regeneration development(mainly fast-growing pioneer trees),which quickly transited to higher size ***,after this initial stage of pioneer recruitment,the number of recruits dropped followed by a virtual absence of growth regardless of the species group as a result of a quick bamboo *** bamboo recreated a dense understory it reduced species diversity to original levels,suggesting a self-maintaining cycle that halts forest *** the other hand,the bamboo die-off had little impact on AF where a slow recruitment process typical of old-growth forests was *** results indicate that the die-off event had a temporary effect on species diversity *** to forests where bamboos are dominant in a similar process described in other southern South American *** the first study to obser

关键词： dominant species merostachys skvortzovii send. forest succession biodiversity forest regeneration

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