Canopy gap colonization in the Atlantic Montane Rain Forest

Lima, Renato A. F. de; Moura, Leila Cunha de

doi:10.1590/s1516-89132006000700013

Cited by 9 publications

(12 citation statements)

References 39 publications

(50 reference statements)

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“…Rocks are clearly not a good substrate for many plant species development (but see Lima, 2007 for examples of species able to reach the adult phase in the PECB). Lima and Moura (2006) have already suggested some negative aspects of C. communis over the establishment of woody species, in a similar way to those cited by other authors ( Ehrenfeld, 1980;Chandrashekara and Ramakrishnan, 1994;Davis et al, 1998;George and Bazzaz, 1999).…”

Section: Wood Debrissupporting

confidence: 78%

Structure of the herb stratum under different light regimes in the Submontane Atlantic Rain Forest

Lima

Gandolfi

2009

Braz. J. Biol.

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This study aimed to characterize the structure of the herb stratum in relation to light availability in the Submontane Atlantic Rain Forest at the Carlos Botelho State Park, SP, Brazil. Forty-one 10 x10 m plots were established under the closed canopy (18 plots), small and medium canopy gaps (11) and large canopy gaps dominated by Guadua tagoara (Ness) Kunth (12). Inside each plot, the line intercept method was applied to assess soil coverage as an estimate of density of herb stratum vegetation. Hemispherical photographs were taken at the centre of the plots to evaluate the annual light regime. Overall, Calathea communis Wanderley and S. Vieira had the greater mean coverage, followed by woody seedlings, ground ferns and other herbs (mainly, Araceae, Acanthaceae, Amaranthaceae and Cyperaceae). There were strong correlations among several groups of the herb stratum, such as the negative correlations between woody seedlings with the coverage of C. communis and with rocks. The analysis of the hemispherical photographs confirmed the difference among environments that led to significant differences in the soil coverage of the herb stratum vegetation but woody seedlings. For instance, C. communis showed great coverage in large gaps while ferns were more abundant in small and medium gaps and in the understorey. Other herbs, in turn, demonstrated bigger soil coverage in small and medium gaps. Although this study represents a rough assessment of the structure and composition of the herb stratum, the results found here illustrated the evident relation between herb species density and the environmental variation promoted by changes on canopy structure and topography.Keywords: Calathea communis, canopy gaps, ground herbs, light. Estrutura do estrato herbáceo sob diferentes regimes de luz na Floresta Pluvial Atlântica SubmontanaResumo O objetivo deste estudo foi caracterizar a estrutura do estrato herbáceo em relação à disponibilidade de luz na Floresta Pluvial Atlântica Submontana do Parque Estadual Carlos Botelho, SP, Brasil. Para tanto, foram instaladas 41 parcelas de 10 x 10 m em ambientes sob o dossel fechado (18 parcelas), em clareiras pequenas e médias (11), e em clareiras grandes com dominância de Guadua tagoara (Ness) Kunth (12). Em cada parcela a percentagem de cobertura de solo, avaliada através do método de interceptação em linha, foi usada como estimativa da densidade da vegetação do estrato herbáceo. Fotografias hemisféricas foram tomadas ao centro de cada uma das parcelas para avaliar o regime anual de luz nos ambientes. No geral, a maior média obtida foi para Calathea communis Wanderley e S. Vieira, seguida por plântulas de regenerantes lenhosos, pteridófitas terrestres e outras ervas (principalmente Araceae, Acanthaceae, Amaranthaceae e Cyperaceae). Houve ainda fortes correlações entre vários grupos do estrato herbáceo, como as correlações negativas entre plântulas de regenerantes com a cobertura de C. communis e de rochas. A análise das fotografias hemisféricas confirmou a existência de ambientes com...

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Section: Wood Debrissupporting

confidence: 78%

Structure of the herb stratum under different light regimes in the Submontane Atlantic Rain Forest

Lima

Gandolfi

2009

Braz. J. Biol.

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“…In the study site, the size and number of falls in ridges were smaller than in slopes and valleys, and there was a higher incidence of branch falls in ridges. This pattern is probably an outcome of the association between differences across hills in stand parameters (Lima and Moura 2006), soil structure and wind exposure (Poorter et al 1994). …”

Section: Gap Disturbance Patternsmentioning

confidence: 99%

“…In the topographic positioning analysis, although the more frequent species (e.g. E. edulis, Pouteria bullata, O. catharinensis and Rapanea hermogenesii) did not show any tendency of occurrence across hills, a great number of species presented changes in their abundances, even when they were found in all classes (see Table 3 in Lima and Moura 2006). Additionally, the ISA pointed out some species, which were indicators of different gap size classes and gaps in different topographic positions (Table 4).…”

Section: Gap Disturbance Patternsmentioning

confidence: 99%

“…In the Brazilian Atlantic Rain Forests, very little is known about forest dynamics and about the influence of gap processes in forest maintenance (see Carvalho et al 2000;Mantovani 1999, 2000;Lima and Moura 2006). Despite its importance to global biodiversity (with 2.7% of global number of endemic plant species) and representing one of the most threatened tropical forests in the world (only 7.5% of original vegetation extent left: Myers et al 2000), few studies exist for the forests in this biome.…”

Section: Introductionmentioning

confidence: 99%

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Gap disturbance regime and composition in the Atlantic Montane Rain Forest: the influence of topography

Lima

Moura

2007

Plant Ecol

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In the Atlantic Montane Rain Forest of south-eastern Brazil, a field study was carried out to describe the forest disturbance regime, analyse canopy gap composition and evaluate the influence of habitat parameters on gap tree species composition. We characterized canopy gaps considering the group of variables as follows: area, type and number of tree/ branch falls, topographic position, soil coverage and surrounding canopy trees. Gap composition was assessed at species level by measuring all individuals inside gaps higher than one meter. Mean gap area of the 42 canopy gaps analysed was 71.9 ± 9.0 m 2 (mean ± SE). Out of the studied gaps, 35.7% were created by uprooted and by snapped trees, 16.7% by dead-standing trees and 11.9% by the fall of large branches. The disturbance regime was characterized by gap openings predominantly smaller than 150 m 2 and by spatial patterning related to topography. Ridges had smaller gaps and higher proportions of gaps created by branch falls; slopes had bigger gaps generally created by uprooting events. The more abundant and frequent species were shade tolerant and the more species-rich families found inside gaps did not differ from the forest as a whole. Pioneer species were rare and restricted to medium and large size classes. The Indicator Species Analysis and the Canonical Correspondence Analysis indicated gap area, topography and the percentage of soil cover by the genera Calathea and Ctenanthe were the predominant variables correlated with woody species distribution. So, topography emerged as an important issue not only to the gap disturbance regime, but also to gap colonization. In respect to the influence of gap processes on the Atlantic Montane Rain Forest regeneration, our results support the view that canopy gap events may not be working as promoters of community wide floristic shifts.

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“…The occurrence of clearings in forest fragments can initially result in independence of the different regions of the forest community (Lima, 2005;Lima & Moura, 2006), with consequent spatial dependence on the pre-existing population. These canopy opening sites are initially colonized by species that had been excluded by interspecific competition, but returned and became established in those recently disturbed sites (Fox, 2013).…”

Section: Discussionmentioning

confidence: 99%

Spatial and temporal distribution of species diversity in semideciduous seasonal forests with occurrence of fire

Silva

Venturin

Carvalho

et al. 2017

RBT

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Abstract:The spatial and temporal distributions of vegetation can be influenced by edaphic and environmental factors as well as disturbances. The present study was undertaken to characterize the distribution and spatial dependence of species diversity in a fragment of semideciduous seasonal forest after a disturbance event by fire and to identify changes during natural regeneration. The fire, occurred in 1999, and surveys were undertaken in 2000, 2005 and 2014 in 26 geo-referenced plots (400 m²) distributed along two transects. The Fire Damage Index (FDI) in each plot was based on a scale from 0 to 5, and all of the arboreal individuals with diameters at breast height (DBH) ≥ 5 cm were identified in each plot. Species diversity was calculated using the Shannon index (H'), and species richness (S) was estimated using species accumulation curves; variations between the surveys compared based on the means and standard errors. The S, H' and FDI data were submitted to non-spatial exploratory and geostatistical analyses. After adjusting the semivariograms, the levels of spatial dependence were classified, and interpolation of the variables values were performed using ordinary kriging to characterize their spatial distributions in the form of maps. Spatial analysis was used to identify and characterize differences between the post-fire surveys in terms of the configurations of the arboreal community. The fire event influenced the spatial and temporal structures of the variables S and H'. These variables showed spatial dependence and aggregated distributions, with reduction in the distance under spatial influences and a uniformity of individuals distribution in the forest fragment at the different surveys. This research characterized the distribution and spatial dependence of the variables S and H' in a forest fragment after a fire event and the alterations in the arboreal community structure during natural regeneration. Rev. Biol. Trop. 65 (2): 525-534. Epub 2017 June 01.Key words: Atlantic Forest, Brazil, forest fragmentation, anthropogenic disturbance, long-duration study, spatial dependence, geostatistics.example, habitat degradation results in reductions of both forest cover and species diversity (Ribeiro, Martensen, Metzer, Tabarelli, Scarano, & Fortin, 2011) with serious implications for forest ecosystem functioning and organization (Silva-Matos, Fonseca, & Silva-Lima, 2005;Lima & Moura, 2008;Pereira, Filho, Eisenlohr, Miranda, & Filho, 2015). The spatial distribution of forest species is an interactive Forest fragmentation is one of the principal factors promoting forest degradation. In addition to generating forest mosaics at different regeneration stages, fragmentation favors the propagation of subsequent fires and other environmental disturbances that promote spatial discontinuity of forest composition (Amaral, Ferreira, Watzlawick, Longhi, & Sebem, 2013b). In the Atlantic Forest biome, for phenomenon involving competition, tree architecture, and the occurrence and availability of forest openings (Sanquetta,...

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Canopy gap colonization in the Atlantic Montane Rain Forest

Abstract: In the Atlantic Montane Rain Forest of South-eastern Brazil, a

Cited by 9 publications

References 39 publications

Structure of the herb stratum under different light regimes in the Submontane Atlantic Rain Forest

Structure of the herb stratum under different light regimes in the Submontane Atlantic Rain Forest

Gap disturbance regime and composition in the Atlantic Montane Rain Forest: the influence of topography

Spatial and temporal distribution of species diversity in semideciduous seasonal forests with occurrence of fire

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