Sucessão ecológica de macroinvertebrados bentônicos no Olho d’água da Bica, Cuité – PB, Brasil.

Abstract

The macroinvertebrate species are a group formed by apparently visible invertebrates living or not locked to the substrate. Are quite valuable for assessing water quality (biomarkers), are also of great importance in the food chain, they serve as a primary trophic chains of aquatic ecosystems link. This study aimed to characterize the ecological succession of benthic macroinvertebrates in two artificial substrates. The collections were made in Horto Florestal Olho d'Água da Bica in the city of Cuité -PB, from May 2013 to January 2014. Containing polyethylene cages inside siliceous gravel and stones were used. These were distributed in three areas of the Horto. Every two months 10 cages were withdrawn: 5 with each type, within one year, totaling 5 collections. After each collection, the cages were washed in tap water on sieves with mesh particle size < 0.5 mm, and placed in properly labeled plastic containers and fixed in 70% alcohol. In the laboratory were all screened with the aid of trans - illuminated tray and then identified by stereoscopic microscope and specialized bibliographies. Quantitative data were descriptively worked, and inferential analysis was made by Student's t test and ANOVA, the level of significance was p < 0.05. The software used was STATISTICA ©, version 4.0. A quantity of 1575 specimens was found with a higher abundance of the order Diptera (Chironomidae) 867; melanoid 480; Oligochaeta 50 and a greater shortage Sciomyzidae, Aeshnidae and Zygoptera in which only one body was found. In cages with gravel stones colonized bodies 652 and 923 with the siliceous rocks. Significant differences between sites and sampling points were recorded. Substrate type, samples, seasons and environments ( entic and lotic) were statistically equal. In conclusion, consider no difference in the type of artificial substrate, for both there was a great abundance and diversity of specimens.