Relação Fauna Do Solo-Paisagem Em Plantio De Eucalipto Em Topossequência

Abstract

ResumoEste estudo objetivou avaliar a influência do relevo sobre os artrópodes edáficos em um plantio de Eucalyptus urophylla. Coletou-se a camada de serapilheira e solo (0 -5 cm) circunscritos a um gabarito metálico (25 x 25 cm) lançado aleatoriamente (N = 10) em três seções topográficas (TS, TM e TI: terços superior, médio e inferior, respectivamente) nas estações chuvosa e seca de 2003. Formicidae foi o grupo taxonômico predominante, independentemente da seção topográfica. A análise de componentes principais individualizou as seções topográficas entre si e demonstrou a correlação de um maior número de grupos taxonômicos com TS. A análise de agrupamento hierárquico indicou a elevada similaridade entre TI e TM, que se apresentaram como dissimilares em relação a TS. As diferenças entre as seções topográficas provavelmente foram influenciadas pela maior umidade gravimétrica e fertilidade do solo em TS. Palavras-chave: Artrópodes do solo, biologia do solo, Eucalyptus urophylla, Formicidae, relevo. AbstractSoil fauna-landscape relationship in topossequence eucalyptus plantation. This study aimed to evaluate the influence of relief on edaphic arthropods in a Eucalyptus urophylla plantation. Litter layer and soil (0 -5 cm) randomly released (N = 10) circumscribed to a metal jig (25 x 25 cm) were collected in three topographic sections (TS, TM, and TI: upper, middle, and lower thirds, respectively) in the rainy and dry seasons of 2003. Formicidae was the predominant taxonomic group, independently of the topographic section. The main component analysis individualized the topographic sections among themselves and demonstrated the correlation of a greater number of taxonomic groups with TS. The hierarchical clustering analysis indicated high similarity between TI and TM, which were dissimilar in relation to TS. The differences among topographic sections were probably influenced by the higher gravimetric moisture and soil fertility in TS.

Priority Areas for Water Resources Conservation: Study Case Canal Guandu Watershed

“…The soil classification was based on the Brazilian Soil Classification System (Santos et al, 2018) The soil map units were simplified at tree types of soil associations, respecting the concepts preconized by Santos et al (2018) and IBGE (2015). The characterization was based on soil profile description and the spatialization considered environmental characteristics related with soil forming factors, where the climate, the relief, the organisms, the parental material, and the time are responsible for soil differences (Neto et al, 2018). The main factors considered were the TWI and the elevation (DEM) that reflected the differences regarding soil drainage, corroborating field observations.…”

Structural and Environmental Variability From the Edge to the Interior of an Atlantic Forest Remnant in Brazil

“…Environmental variables such as moisture, penetration resistance, cation exchange capacity and sodium and potassium levels were the main factors which explained the differences between the studied environments and these parameters determined the composition of the community (Rodrigues et al 2020). The higher humidity values of the sample units within the forest edge were probably related to the higher presence of clay in the ground (Corrêa Neto et al 2018) and consequently caused greater resistance to penetration compared to other environments (Mendes et al 2016).…”