IMPACT OF Bambusa tuldoides MUNRO (POACEAE) ON FOREST REGENERATION

Roselene Marostega Felker,Maureen De Moraes Stefanello,Ana Paula Moreira Rovedder,Aline Peccatti,Solon Jonas Longhi,Elias Frank Araujo

doi:10.1590/01047760201723022297

Roselene Marostega Felker, Maureen De Moraes Stefanello + Show 4 more

Open Access

https://doi.org/10.1590/01047760201723022297

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Journal: Cerne	Publication Date: Jun 1, 2017
Citations: 3	License type: cc-by

Affiliation: Universidade Federal de Santa Maria

Abstract

ABSTRACT Bamboo grove may cause changes in the structure and floristic composition of natural regeneration. This study evaluated the impact caused by Bambusa tuldoides Munro at natural regeneration, in riparian forest in Rio Grande do Sul, south of Brazil. Two areas were evaluated: riparian forest without bamboos (SB) as the reference area, and riparian forest dominated by Bambusa tuldoides (CB). In 2014, ten plots (10x10 m) were installed in each area. All individuals belonging to classes I (30≤ H <130 cm) and II (CBH≤5 cm) were measured and identified. Floristic composition, phytosociological indexes, Shannon diversity index, Margalef richness, Simpson dominance, Sorensen similarity, and cluster analysis by Twinspan were evaluated. Richness and absolute density decreased in CB compared to SB. The areas presented low floristic similarity, and high dominance of one or more species in both classes. Myrtaceae was the predominant botanic family in SB, especially Campomanesia xanthocarpa. In CB most species were secondary, as Myrsine umbellata, Cupania vernalis, and Ocotea puberula. Due to the large differences between SB and CB, the groups formed were restricted mostly to the species of each area. Species such as Myrsine umbellata (class I and II) and Strichnos brasiliensis (class II) appear as indicators and former of groups in CB. We concluded that high density of Bambusa tuldoides affect the richness and diversity of regeneration natural, changing the establishment and perpetuation of the species. Secondary species show greater potential for adaptation to these environments and can act as key species in management and recovery actions.

Highlights

Natural regeneration is related to several processes to maintenance of vegetal communities as nutrients availability, opening of forest clearings and competition (MARIMON et al, 2010; SANTOS et al, 2012)
The present study aims to evaluate the impact of Bambusa tuldoides in natural regeneration
The CB area did not present more than 10% of the total of sampled individuals, as well as it did not reach more than 50% of the richness verified in sem bambus (SB), for both classes of sampling

Summary

INTRODUCTION

Natural regeneration is related to several processes to maintenance of vegetal communities as nutrients availability, opening of forest clearings and competition (MARIMON et al, 2010; SANTOS et al, 2012). Dominance of invasive exotic species is one of the most evident impacts of anthropic changes in the distribution of vegetal communities. Current studies indicate that bamboos change forest structure, floristic composition and resilience of vegetal communities (ELIAS et al, 2015; FUKUSHIMA et al, 2015). Studies about natural regeneration in bamboodominated forest remnants allow show impacts in vegetal community and may to indicate restoration practices. This area presents 2 ha and is located at the following coordinates 30 ° 9’26.89 “S and 51 ° 35’31.78” W. In 2014, ten sampling units of 10x10 m were systematically installed in the CB and SB areas It was carried out the identification of all the individuals, present in the sample units of 10x10 m, belonging to two regeneration classes. The analysis was performed in PC-ORD program for Windows version 4.14 (McCUNE; MEFFORD, 1999)

RESULTS

DISCUSSION

CONCLUSION