Soil macrofauna as bioindicator of the recovery of degraded Cerrado soil

Abstract

The construction of the hydroelectric power plant of Ilha Solteira, in state of São Paulo, was initiated in the 1960s, when an average, 8.60 m of soil depth was removed, resulting in a degraded area. A plan for the recovery of the area started in 2005 in Selvíria /MS with the use of plant species adapted to the Cerrado biome. This study aimed to evaluate the soil macrofauna of an area under recovery by using different types of soil cover (1- bare soil (control); 2- native Cerrado vegetation; 3- specie Astronium fraxinifolium; 4- Astronium fraxinifolium + Canavalia ensiformis; 5- Astronium fraxinifolium + Raphanus sativus; 6- Astronium fraxinifolium + Brachiaria decumbens + sewage sludge). Soil macrofauna was evaluated in 2005, 2006 and 2007 using the direct collection method and manual counting. Number of species, diversity and uniformity index were determined. Principal component analysis (PCA) and cluster analysis were used for data interpretation. Results showed that treatment 6 (Astronium fraxinifolium+ Brachiaria decumbens+ sewage sludge) increased the soil macrofauna population by approximately 4 to 6 times more than the other types of cover after three years of evaluation. And the PCA and cluster analysis showed the approximation of the data between treatment 6 and Cerrado, which represents the most appropriate treatment for the recovery of the degraded soil.

Decomposition Rate of Organic Residues and Soil Organisms’ Abundance in a Subtropical Pyrus pyrifolia Field

“…These studies have reported soil improvements, and soil organisms' activity with the continuous use of compost and green manure practice in tropical and subtropical soils. Overtime the use of organic amendments promotes both habitat and food provision to a wide range of soil organisms that provide ecosystem services, such as organic matter decomposition, nutrient cycling, and soil food web [45][46][47].…”

Macrofauna edáfica como bioindicadora da qualidade do solo em diferentes sistemas de manejo

“…This order has the largest number of species cataloged (Korasaki et al, 2013). The Coleoptera are good environmental indicators because there is a high diversity, occupying different trophic levels, having their specificities within their ecological niches, and changes in soil management are sensitive (Kitamura et al, 2020). Besides, colepterans are predators and regulate insect populations (Santos et al, 2017).…”

“…The activity of these organisms and their specificities are fundamental for the sustainability of natural or manageable ecosystems; however, soil management practices can affect the fauna diversity, directly influencing the ecological and biological functions in the soil (Ferreira et al, 2019;Kitamura et al, 2020).…”

Relationship between Potential Trace Elements Contamination in Sediment and Macrofauna in the Upper Gulf of Thailand

“…Macrofauna is an animal group ranging in size from 0.5 to 5 cm that inhabits soft sediment, sand, and mud, and they are associated with fragmentation and decomposition of organic matter as well as nutrient uptake from organic matter, which promotes growth and biofiltration [ 7 , 8 ]. Furthermore, macrofauna is among the most suitable organisms for bioindicators and bioaccumulators in environmental monitoring studies as they use nutrients from the beach for maintenance and survival [ 9 , 10 ]. These nutrients act as specific and appropriate biotic tools that can be used when monitoring environmental changes caused by toxic contamination in an area [ 11 , 12 ], especially for heavy elements that chronically contaminate the food chain.…”