Change of collembolan (Hexapoda: Collembola) community structure related to anthropic soil disturbance

DI CIOCCO, CÉSAR; FALCO L; COVIELLA, CARLOS; SANDLER, V; CASTRO HUERTA, RICARDO

REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS DE LA UNIVERSIDAD NACIONAL DE CUYO

UNIV NACIONAL CUYO

Año: 2018

0370-4661

In order to evaluate the effects of the anthropic impact on the structure of de soilcollembolan community, three different soil uses were researched: agricultural fields(AG) with 50 years of continuous farming, pastures entering the agricultural cycle(CG), and naturalized grasslands (NG). The study was carried out in fields of Chivilcoy(34° 53?49 S, 60°01?09 W, elev, 60m) and Navarro (34°51?30 S, 59°12?25 W, elev. 43m),Buenos Aires Province, Argentina. For each of the three uses, three fields were selectedas replicates, with three soil samples per replicate and sample date (10) for a total of 216samples analyzed. Collembolans (Hexapoda: Collembola) were extracted and identifiedto family level. Five families were found: Hypogastruridae, Onychiuridae, Isotomidae,Entomobryidae, and Katiannidae. Soils were also characterized by means of physical andchemical analyses. The index of degree of change of collembolan diversity was calculatedwith the biological data. The results show that the biological index of degree of changecan detect soil use effects on the collembolan community. Somewhat surprisingly, theindex showed that the diversity of collembolans was higher in the high anthropic impactsite AG, followed by CG and lowest in NG. The results also show that collembolan familiesrespond differently to soil use. The families Hypogastruridae, Onychiuridae, and Isotomidaepresented differences between systems. Therefore, collembolan communitystructure can be a useful tool to assess agricultural practices´ impacts on soi