scholarly journals Seed rain in a restoration site and in an adjacent remnant of Seasonal Atlantic Forest

2020 ◽  
Vol 30 (4) ◽  
pp. 1230-1244
Author(s):  
Vanessa França Vindica ◽  
Larissa Rafaela Bargoena ◽  
Pamela Cristina Santana ◽  
Jose Antonio Pimenta ◽  
Alba Lucia Cavalheiro ◽  
...  

A sucessão ecológica depende da chuva de sementes. Embora a simples chegada de sementes não garanta o estabelecimento, conhecer a chuva de sementes é o primeiro passo para avaliar o processo sucessional em sítios sob restauração florestal. Por essa razão, foi amostrada a chuva de sementes em reflorestamento e em remanescente de floresta estacional semidecidual no sul do Brasil, a fim de descrever o processo. Em cada área, 18 armadilhas de sementes (1 m2) foram alocadas e visitadas, mensalmente, por dois anos. Todas as sementes amostradas foram identificadas, contadas e classificadas quanto à forma de vida, grupo ecológico e síndrome de dispersão. O remanescente florestal apresentou maior riqueza de espécies e abundância de propágulos que o reflorestamento. A composição de espécies também diferiu entre as áreas. A chuva de sementes, de ambas as áreas, apresentou maior proporção de árvores e de espécies intolerantes à sombra. Várias espécies não plantadas no reflorestamento, possivelmente dispersadas a partir do remanescente florestal, foram registradas no sítio em restauração. A análise dos resultados sugere que a chuva de semente não é um impedimento ao processo sucessional no reflorestamento. Entretanto, o sítio deve ser monitorado por mais tempo a fim de avaliar o estabelecimento, e não somente a chegada de sementes de espécies sucessionais tardias.

2017 ◽  
Vol 33 (5) ◽  
pp. 309-316
Author(s):  
Daniella Schweizer ◽  
Débora Cristina Rother ◽  
Ana Elena Muler ◽  
Ricardo Ribeiro Rodrigues ◽  
Marco Aurélio Pizo ◽  
...  

Abstract:A comprehensive assessment of the effect of disturbances on tropical and subtropical forests is needed to better understand their impacts on forest structure and diversity. Although taxonomic and functional diversity measures have been successfully adopted in this context, phylogenetic diversity metrics are still poorly explored. We compared the phylogenetic structure of the seed rain and regenerating seedling community in patches of an old-growth Atlantic Forest remnant dominated or not by a ruderal bamboo species, Guadua tagoara. We sampled those patches before and after illegal harvesting of the palm Euterpe edulis thus assessing if the harvesting led to changes in the phylogenetic structure of the seed rain and the regenerating community in both patches. Bamboo-dominated patches showed a significantly higher presence of species in the seed rain that were more distantly related to each other in the phylogeny than expected by chance compared with patches without bamboos, but this difference disappeared after palm-heart harvesting. Contrary to what we expected, we did not find significant changes in the phylogenetic structure of seedlings before or after palm-heart harvesting. The phylogenetic structure at the tips of the phylogeny was random overall. The maintenance of a higher presence of far relatives in the phylogeny of the seedling community suggests, assuming trait conservatism, that despite bamboo dominance and palm-heart harvesting, functional diversity is being preserved at least in the early regenerating stages and in the time frame of the study. However, higher presence of pioneer taxa after palm-heart harvest indicates that this disturbance may lead old-growth areas to earlier successional stages.


Plant Ecology ◽  
2006 ◽  
Vol 190 (1) ◽  
pp. 81-95 ◽  
Author(s):  
Adriana Maria Zanforlin Martini ◽  
Flavio Antonio Maës dos Santos
Keyword(s):  

2013 ◽  
Vol 29 (5) ◽  
pp. 391-399 ◽  
Author(s):  
Romualdo Morelatto Begnini ◽  
Tânia Tarabini Castellani

Abstract:Isolated pioneer trees have been shown to increase the deposition of animal-dispersed seeds. The effect of gender on seed rain has not yet been investigated, and this study aimed to evaluate whether female and male plants of a pioneer dioecious zoochoric tree differ with respect to the seed rain under their canopies. Seed rain was evaluated for 13 mo, from October 2009 to October 2010, in secondary vegetation of the Atlantic forest in southern Brazil. We used 60 seed traps (0.5 m2): 40 traps under the crowns of 40 Myrsine coriacea (Primulaceae) trees (20 male and 20 female individuals) and 20 at sites without trees. We found 365071 diaspores belonging to 115 morphospecies from 37 families, and 38.3% of the morphospecies were trees, most of them zoochoric. The female trees accumulated a greater number of diaspores and species richness than male trees. The male trees accumulated a higher number of seeds and species than areas without trees. This study shows that sites containing female and male trees of M. coriacea and sites without trees differed significantly in terms of seed rain, and there is a gender effect in this dioecious, pioneer tree species because female plants promote an increase in the richness and abundance of diaspores.


2014 ◽  
Vol 28 (1) ◽  
pp. 76-85 ◽  
Author(s):  
Maria Tereza Grombone-Guaratini ◽  
Luciana Ferreira Alves ◽  
Daniella Vinha ◽  
Geraldo Antônio Daher Corrêa Franco
Keyword(s):  

PLoS ONE ◽  
2019 ◽  
Vol 14 (12) ◽  
pp. e0226474 ◽  
Author(s):  
Daniel Piotto ◽  
Dylan Craven ◽  
Florencia Montagnini ◽  
Mark Ashton ◽  
Chadwick Oliver ◽  
...  

2013 ◽  
Vol 53 ◽  
pp. 49-55 ◽  
Author(s):  
Cíntia Gomes Freitas ◽  
Cristian Dambros ◽  
José Luís Campana Camargo

2006 ◽  
Vol 132 (1) ◽  
pp. 50-60 ◽  
Author(s):  
Felipe Pimentel Lopes de Melo ◽  
Rodolfo Dirzo ◽  
Marcelo Tabarelli

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
I Castro-Gamboa ◽  
R Burgos ◽  
P Cardoso ◽  
F Carnevale ◽  
A Pilon ◽  
...  

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