DIVERSITY, PHENOLOGY AND VOLTINISM OF CHIRONOMIDAE (DIPTERA). NEOTROPICAL STREAMS AS A STUDY MODEL

ZANOTTO ARPELLINO, JUAN PABLO; RODRÍGUEZ CATANZARO, LUDMILA; MONTALTO, LUCIANA; SIRI, AUGUSTO; DONATO, MARIANO

ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS.

ACAD BRASILEIRA DE CIENCIAS

Lugar: Rio de Janeiro; Año: 2022

0001-3765

Studies of therelationships between the temporal variation of biological phenomena and environmentalare essential to understanding the dynamics of communities. Phenology is astructuring element and, together with voltinism, is related to timing ofreproductive activities. The aim of this study is to ascertain the structureand composition of the Chironomid assemblage and its emergence patterns inrelation to the environmental variables through the use of the Chironomid pupalexuviae technique using the Neotropical streams as a model. The streamspresented similar species compositions. The highest density of pupal exuviaewas 42 recorded during spring and the greatest richness in late summer andearly autumn. Chironominae presented greater prevalence throughout the yearwith oscillations for Orthocladiinae and Tanypodinae. Chironominae andTanypodinae presented emergence peaks in spring-summer and Orthocladiinae inautumn-winter. Rainfall, photoperiod and water and air temperatures structuredthe Chironomid assemblage, influencing emergence. Univoltine, bivoltine andmultivoltine species were recorded. The species presented interspecific synchronizationin emergence peaks at different times of the year.