Francisco José Pegado Abílio

Ocorrência de Lymnaea columella (Gastropoda: Lymnaeidae), hospedeiro intermediário da Fasciola hepatica, para o Estado da Paraíba, Brasil

Foi registrada a ocorrencia de Lymnaea columella (Gastropoda: Lymnaeidae), primeiro hospedeiro intermediario da Fasciola hepatica, para o Estado da Paraiba, Brasil, associado a macrofitas aquaticas.

Chironomus gr. decorus (Diptera: Chironomidae) e outros insetos aquáticos de um açude temporário do semi-árido paraibano, Brasil

The aim purpose was to study the composition of Chironomidae fauna and the anothers aquatic insects in a temporary dam. Qualitative samples were realized in two periods: August/1995, higher level of water and March/1999, after the completely drying dam for 3 years. Only one species of Chironomidae was registered, Chironomus gr. decorus, in both periods, which contributed with 28.09% for the total aquatic insects fauna in August/95 and it was the only species to colonize the sediment of dam after 3 years of drying period. In August/95 observed the occurrence of Odonata, Coleoptera, Hemiptera, Ephemeroptera and Trichoptera. In this period was evidenced lower values of dissolvid nitrogen (ammonium, nitrite and nitrate), sulfate and electric conductivity compared with March/99. Thus, the aquatic insects fauna were strongly ifluenced by physical and chemycal conditions. Two considerations its may be registred, in spite of appearing of Chironomus gr. decorus, immediately after the dry period: 1. The oviposition by flying females, originating from permanent waters, is the most important means of recolonizing habitat refilled; 2. Or the species it may be survive the desiccation, as larvae in dry sediment or in cocoon during the dry period.

FORMAÇÃO CONTINUADA DE PROFESSORES: VIVÊNCIAS DE EDUCAÇÃO AMBIENTAL NO CONTEXTO DO SEMIÁRIDO

The article aims to describe the studies and pedagogical interventions of environmental education developed in Caatinga biome by continuing education processes of teachers in the municipality of Sume, Paraiba. It was a qualitative research with emphasis on assumptions of bioregionalism theory, school ethnography and phenomenology. It was developed during the year 2012 with 50 elementary school teachers, and in three steps: (1) diagnosis and intervention demands, (2) continuing education process, and (3) assessment of the obstacles and challenges of research. The results obtained from the teacher diagnosis identified an educational process marked by the lack of teaching resources, infrastructure and continuing education courses in the environmental area. However, the realization of a process of continuing education in environmental education based on participatory, contextualized and interdisciplinary practices, enabled a socio-educational transformation in this schools including environmental education in the pedagogical practice of teachers and the daily life of schools in Sume.

BENTHONIC MACROINVERTEBRATES AS BIOINDICATORS OF ENVIROMENTAL QUALITY FROM WATER BODIES OF CAATINGA.

BENTHONIC MACROINVERTEBRATES AS BIOINDICATORS OF ENVIROMENTAL QUALITY FROM WATER BODIES OF CAATINGA. In the Brazilian Northeast, many water bodies are temporary. Being thus, the composition and structure of zoobenthos are important tools to understand the dynamics and infer about the standards of trofic relations and environment quality of these ecosystems. The purpose of this study is to analyze the taxonomic structure and the population dynamics of the invertebrates associated to the littoral sediment of aquatic bodies of the Taperoá River hidrografic basin. Bimonthly samples were collected from August/2002 to April/2005 using a van Veen grab (400cm2) and a D-frame aquatic net with 500-μm-mesh size, respectively to quantitative and qualitative samples. Simultaneously, some environment variables were determined to be related to the biological data. During the study period, a maximum richness of 50 taxa for the zoobenthos were registered, being Insecta, Mollusca, Crustacea and Annelida the most representative group. The analysis of the invertebrates taxoncenose indicated Chironomidae and Conchostraca as dominant groups in temporary ponds, and Gastropoda in dams and rivers. The presence of organisms known as bioindicators of water quality, such as Trichoptera and Ephemeroptera, was also verified, especially in temporary lagoons, demonstrating a low level of organic enrichment of these environments.