Renato de Medeiros Rocha

The use of geotechnologies in projects and activities becomes increasingly necessary in view of the requirements of the environmental field for more satisfactory results and clearer, and less costly in terms of finance and time. Geotechnologies through GIS is a tool that presents the possibility of analysis and management of degraded areas. The results were based upon the information set forth in the project “Live Edge” and the use of Arcgis 10.2.2 software for data entry and analysis and generation of information. Identified 56 areas for recovery, and the classes of land cover and land use: farming, building, exposed soil, vegetation and wetland. Presented the possibility of entering alphanumeric information for each area by the attribute table. This work aimed to present the applicability of using a geographic information system (GIS) in the management of reclamation in the study stretch of the River Apodi-Mossley in the town of Mossley / RN environment.

AimIn this research, we aimed to model limnological parameters in the Salina Unidos (Macau-Brazil) using GIS technology. We hypothesized that in solar saltworks, the geochemical characteristics of the brines (i.e. the strong solution of salts) vary considerably through the salt ponds circuit, in which drastic changes can damage the entire salt production.MethodsGeochemical parameters were monitored in seven sampling points distributed along the salt ponds circuit, during a complete cycle of salt production, i.e., from January to December 2007. The open source software Spring 5.1.6 was used to build, store, analyze and model the spatial distribution of the parameters.ResultsWe identified a spatial gradient of the salinity and temperature, with values increasing from evaporation ponds to concentration ponds, showing a relationship with the salt production. The parameters, depth, dissolved oxygen concentrations and total dissolved reactive phosphorus showed a decrease from the evaporation ponds towards the concentration ponds. Among the dissolved inorganic nitrogen forms analyzed (NH3-, NO2- and NO3-), nitrate was the predominant, namely in the concentration ponds, where it reached the highest concentrations. The concentration of chlorophyll awas higher in the initial and intermediate evaporation ponds, showing a distinct dynamics of in relation to other environmental variables.ConclusionsThe increased concentration of the analyzed limnological parameters, from the evaporation ponds towards the concentration ponds, evidenced a heterogeneous distribution varying significantly with season. The geochemical spatialization of brine, as illustrated by GIS approach, is very important for the conservation of these environments because this spatial heterogeneity can provide a high diversity of habitat types. This spatial analysis proved to be a practical tool for an adequate management of solar saltworks considering the environmental (ecosystem) and the socio-economic aspects.

ObjectiveThis study analyzed the influence of ecological filters (abiotic variables) on the phytoplankton community in hypersaline ecosystems.MethodsThe abiotic variables measured herein were: pH, water temperature, salinity, ammonium ion, total nitrogen, nitrite, nitrate, total phosphorus, and soluble reactive phosphorus. The phytoplankton community was studied for density, richness and Shannon-Wiener diversity index. Data were analyzed using analysis of variance, linear regression and Canonical correspondence analysis (CCA).ResultsIn total, 110 taxa were identified in 3 solar salterns, distributed into 9 taxonomic classes, with the predominance of Cyanobacteria (41.8%) and Bacillariophyceae (22.7%). The species Pseudanabaena galeata was the only species sampled in all saline environments. Salinity significantly influenced the richness in the three salterns, Augusto Severo (F(1,22) = 23.2, p

O gerenciamento inadequado dos Resíduos Sólidos dos Serviços de Saúde (RSSS) tem se tornado um problema grave enfrentado pela sociedade, já que representa riscos à saúde e ao meio ambiente, principalmente quando esses resíduos são depositados em locais impróprios. Diante disso, esse trabalho teve como objetivo analisar o acondicionamento dos resíduos sólidos dos serviços de saúde nas UBS do município de Caicó/RN. Para a realização da pesquisa foi realizado um estudo descritivo-exploratório de abordagem qualitativa, mediante observações nas unidades básicas de saúde (UBS), as quais permitiram conhecer o espaço físico das unidades, locais destinados para o acondicionamento temporário dos resíduos, materiais utilizados, cores dos recipientes, símbolos, entre outros. Além de entrevistas semiestruturadas com 13 auxiliares de serviços gerais (ASGs) e 13 técnicos de enfermagem das unidades da zona urbana. Através da análise de conteúdo dos resultados obtidos, foi possível constatar que as unidades básicas de saúde do município estudado não possuem um plano de gerenciamento dos seus resíduos, havendo lacunas no acondicionamento e em todas as demais etapas do processo, preconizadas pela resolução do Conselho Nacional do Meio Ambiente (CONAMA) e pelas normas técnicas da Associação Brasileira de Normas Técnicas (ABNT).

Hypersaline floodplains (sabkhas or saltflats) consist of the supratidal plains with low input of clastic sediments, high evaporation rates, and crustal salts. These environments are prone to periodical floodings and evaporite deposition, common in coastal areas with flat topography of arid regions, developing in response to two environmental conditions: deflation of surface sediments, or accumulation of sediments in a lake, or by a combination of both processes. This research developed a geochemical and textural characterization in soil samples collected in the estuarine floodplain (367.7 km2) of the Apodi-Mossoró River (Northeastern coast of Brazil), analyzing the results using multivariate statistics. The cluster and PCA analyses applied to the set of sampled sites enabled to identify two zones typical of the estuarine plain, as well as the major groups of parameters related, being one with the greater direct influence of tides (lower estuary) and another, upstream. This is a result of the a gradual accumulation in the soil (mainly the sodium), after the flood period in the spring tides, followed by a rapid water evaporation caused by high temperatures (>30°C) and constant winds.

A presente pesquisa se trata de uma tentativa de elencar alguns dos principais eventos históricos que marcaram a evolução da atividade salineira a partir da colonização da América portuguesa, com enfoque direcionado ao espaço que hoje corresponde ao Estado do Rio Grande do Norte. Essa atividade teve início com a descoberta e exploração das reservas naturais e a posterior produção de sal marinho nas salinas artesanais. Ao longo do tempo, a atividade salineira passou a impulsionar o desenvolvimento de outras atividades a ela relacionadas, configurando-se como uma das principais atividades econômicas desenvolvidas nas margens das desembocaduras dos principais rios da Capitania do Rio Grande (do Norte). Com o aumento da demanda nacional (séc. XVIII), várias salinas de pequeno porte passaram a ser construídas ao longo do litoral nordeste do Brasil. Todavia, o advento, no Brasil, da política desenvolvimentista baseada na industrialização (segunda metade do século XX) refletiu profundamente nesta atividade, com a implementação de uma indústria salineira de grande porte, com processos de produção e de engenharia baseados no modelo dos Estados Unidos, com a modernização e dinamização de setores industriais para atender às elevadas demandas da indústria química em expansão no país.

Coastal solar saltworks of Brazil are exploited for sea salt, which becomes progressively concentrated by evaporation. This study aimed to review the current and new potential uses of these systems, in order to provide more dynamic for this activity. The first evaporation ponds are also used for artisanal fisheries, ensuring the livelihood of many families. All the brine rich in secondary salts (bittern) can be widely used by the chemical industry, while the Brazil shows an incipient production of "flower of salt", a salt with distinct characteristics with higher market value than sodium chloride. On the other hand, the saltponds have a high potential for management and obtaining of large populations of Artemia spp., purifying the brine through the action as biological filter. This microcrustacean occurs naturally in intermediate salinity ponds, being commonly used in aquaculture. Species of microalgae and halobacteria found in the saltworks are employed for extraction of beta-carotene and glycerol, used in an extensive list of products with high commercial value. These ecosystems represent refuge zones for many species of migratory birds, becoming imperative to promote the conservation of these hypersaline wetlands.

O presente trabalho teve como objetivo identificar as formas de uso de plantas medicinais nativas do bioma Caatinga, em comunidade rural no município de Caicó, Rio Grande do Norte (Nordeste do Brasil). Utilizaram-se entrevistas semi-estruturadas e estruturadas buscando informações, junto a especialistas locais, sobre o uso das plantas. São descritos os usos medicinais de 62 espécies, reportadas por 12 informantes (mateiros, rezadeiras, raizeiros, agricultores e donas-de-casa) com idade superior a 35 anos. As famílias com maior representatividade na consulta foram Fabaceae (13 spp.), Euphorbiaceae (6 spp.) Cactaceae (3 spp.) e Lamiaceae (3 spp.). Para revelar as espécies mais importantes foi considerado o grau de consenso entre as respostas dos informantes. A aroeira (Myracrodruon urundeuva Allemão) e o cumaru (Amburana cearensis (Allemão) A. C. Sm.) destacaram-se como as espécies com o maior número de citações, sendo estas também as que obtiveram o maior número de indicações de usos terapêuticos. As cascas e as raízes foram as partes predominantemente consumidas. Os dados levantados por esta pesquisa evidenciaram uma diversidade de espécies da flora seridoense com potencial medicinal e reforçam a importância que a biodiversidade tem sobre as comunidades rurais, viabilizando o início do estudo de manejo da vegetação local.