HYDRO-MICROBIOLOGICAL ATTRIBUTES OF THE SOIL IN EDGE OF SEASONAL SEMIDECIDUOUS FOREST FRAGMENT

Gabriela Gomes da Silva Gomes da Silva,Talles Eduardo Borges dos Santos,Karolayne Lemes D'Abadia,Ane Gabriele Vaz Souza,Vagner Santiago do Vale Santiago do Vale,Murilo Silva Machado

doi:10.32404/rean.v7i1.3919

Gabriela Gomes da Silva Gomes da Silva, Talles Eduardo Borges dos Santos + Show 4 more

Open Access

https://doi.org/10.32404/rean.v7i1.3919

Copy DOI

Abstract

Native forests have been suffering changes, such as fragmentation and edge effect, and these have implications for the dynamics of carbon within the same fragment, differentiating vegetation and soil. In this way, the work aimed to evaluate the hydro-microbiological attributes of the soil in rainy and dry periods, as well as to indicate if there is an edge effect in a seasonal semideciduous forest fragment. The study was carried out in a forest fragment in the area of the State University of Goiás, Ipameri Campus, consisting of three transects divided into three blocks from the edge. Sampling was performed in two periods of the year, rainy and dry, to determine the gravimetric soil water content (UG), microbial biomass carbon (MBC), basal respiration (BR), and the metabolic quotient (qCO2). The data were subjected to analysis of variance (F test), and when significant, the means were evaluated by the Tukey test at 5% probability. Response variations of microorganisms are closely related to the periods studied; the rainy season benefits the carbon incorporation activity, and the dry season stimulates the carbon release. Consequently, metabolic efficiency is more pronounced in the rainy season. The edge of the fragment only influenced the MBC, evidencing that disturbances caused at the extremity of fragment interfere with the C input in the microbial biomass.

Highlights

Forests are the most responsible for capturing the carbon dioxide present in the Earth's atmosphere
Microbial biomass is considered as the labile fraction of soil organic matter (SOM), it may reflect changes in organic matter (OM), as well as in soil development since microorganisms act in various processes that compromise the ecosystem and are related to soil fertility, nutrient cycling, variations in carbon stocks and OM dynamics (Hoffmann et al, 2018)
For the microbial biomass carbon, the rainy period was higher than the dry period (Figure 2 A), that is, there was higher storage of C in the rainy period

Summary

Introduction

Forests are the most responsible for capturing the carbon dioxide present in the Earth's atmosphere. The edges have biotic and abiotic characteristics distinct from its core, mainly greater exposure to winds, reduced humidity, high light incidence, and high temperatures (Lima-Ribeiro, 2008) All these factors interfere with microbial biomass, considered a living part of organic matter, composed of the entire community of fungi, bacteria, actinobacteria, and algae (Silva et al, 2012). The microbiological fraction presents itself as a strong indicator of disturbances, making it possible to obtain information on the change in its dynamics with the entry in a forest fragment In this way, the work aimed to evaluate the hydromicrobiological attributes of the soil in rainy and dry periods, as well as to indicate if there is an edge effect in a seasonal semideciduous forest fragment

Material and Methods

Results and Discussion

Conclusions

Bibliographic References