Fatores edáficos e as variações florísticas de um trecho de Mata Ciliar do Rio Gualaxo do Norte, Mariana, MG

Abstract

RESUMO -Este trabalho teve como objetivo verificar a correlação entre a distribuição de espécies arbóreas ciliares do rio Gualaxo do Norte (S20°16'31,9" W43°26'15,3" e S20°16'30,6" W43°26'07,3") com fatores edáficos, assim como se existem espécies de ocorrência restrita à área de depleção ciliar que possam ser indicadas para recuperação de matas ciliares. As parcelas foram alocadas em 1 ha dividido em três blocos com declividades distintas. S20°16'31.9" W43°26'15.3" and S20°16'30.6" W43°26'07.3 INFLUENCE OF SOIL FACTORS ON THE FLORISTIC VARIATIONS OF A SECTION OF RIPARIAN FOREST IN THE RIVER GUALAXO DO NORTE, MARIANA, MG ABSTRACT -The objective of this was to investigate the correlation between the distribution of tree species of the riparian forest of Gualaxo do Norte river (

Edaphic and Climatic Relation and Its Influence on the Composition Floristic Lower Stratum in a Floodplain Forest, Pará, Brazil

“…Gonçalves et al (2011) observed the variation of the pH of the 5.78 to 4.21 in environments with 10 m distance of tributary water, which is very similar to the values observed in this study. The increase in value of pH in soil near the Guamá river, in Belém, Pará, occurred in the high rainy period and consequently with greater precipitation (ABREU et al, 2007) and after the intense flood periods (MATTAR et al, 2002;SILVA et al, 2015).…”

“…The eigenvectors found in the canonical correspondence analysis can be considered low when compared with other studies (GONÇALVES et al, 2011;HIGUCHI et al, 2015) and indicate the existence of short gradients, i.e. most species is distributed throughout the environment inventoried (BOTREL et al, 2002), independent of edaphic variation in the high and less rainy periods.…”

“…This is because the soil with high content of silt and clay, although fertile, accumulates water due to poor drainage, creating conditions of hypoxia (PAROLIN, 2009). The existence of preferential niches for certain species was demonstrated by Gonçalves et al (2011), when they noticed that the greatest abundance of thirteen species occurred in flooded forests further away from the river and with higher acidity and eleven most abundant species in an environment closer to the river and with less acidity. Lau and Jardim (2014) detected negative associations between the abundance of some species in the seed bank with the highest concentration of iron.…”

More than environmental control at local scales: do spatial processes play an important role in floristic variation in subtropical forests?

“…In addition, it is particularly interesting to investigate which part of variation in species composition is explained by fractions corresponding to environment, to spatially structured environment, and only to space (Peres-Neto 2006;Peres-Neto & Legendre 2010). In recent years, the Atlantic Forest, one of the world's 35 hotspots for conservation of biodiversity (Ribeiro et al 2011), has been the object of many studies aimed at verifying the effect of environmental variables on vegetation distribution patterns along environmental gradients (Budke et al 2007;Ferreira-Júnior et al 2007;Rodrigues et al 2007;Silva et al 2009;Gonçalves et al 2011;Souza et al 2012;Higuchi et al 2013;Marcuzzo et al 2013;Mélo et al 2013). However, few studies have analyzed the influence of spatial components on the environment and distribution of vegetation (Machado et al 2008;Mélo et al 2013).…”

Species composition, diversity, and vegetation structure in a gallery forest-cerrado sensu stricto transition zone in eastern Mato Grosso, Brazil

“…In more subtle gradients, changes in the vegetation and species composition are more difficult to observe, and can only be understood more conclusively through the integration of studies of species richness and composition, and the vertical and horizontal structure of the vegetation (Marimon et al 1998;Cardoso & Schiavini 2002;Juhász et al 2006;Gonçalves et al 2011). A number of different studies in the Cerrado Biome have indicated that the differences in the composition and structure between the savanna formations and interfluvial forests (cerrado stricto sensu, savanna woodland, and mesophilic forest), and the forest formations associated with bodies of water (gallery and riparian forests) are related to changes in the physical (moisture and flooding levels) and chemical (availability of nutrients) properties of the soils, which are determined primarily by relief and the topography of the terrain (Oliveira-Filho et al 1990;Moreno & Schiavini 2001;Carvalho et al 2005;Gonçalves et al 2011;Loschi et al 2013;Carvalho et al 2013). Given these considerations, the present study compared the variation in the structure and species diversity and composition of the woody, nonwoody and liana vegetation of gallery forest and cerrado sensu stricto in eastern Mato Grosso state, Brazil.…”