Hidrodinâmica das praias de enseada: estudo da enseada do Itapocorói

Mestrado em Meteorologia e Oceanografia FísicaUma investigação que explicasse a formação de vórtices, a circulação das correntes e a sua interaccão com a maré e o vento local no interior das praias de enseada, foi realizada nas praias da Enseada do Itapocóroi (Alegre e Piçarras), no litoral centro-norte do Estado de Santa Catarina - Brasil. Nesse sentido, foram efectuadas várias campanhas para a medição das correntes a diferentes profundidades, caracterização do seu padrão na zona Sul da Enseada e estudo do comportamento do vento local. Estes dados serviram como forçantes de um modelo 3D utilizado para verificar a existência de vórtices durante o período de recolha de dados. Em seguida, foram simulados cenários com diferentes tipos de vento incidente (constante e uniforme) e verificado em que condições se formava o vórtice. Os dados do vento e elevação da superfície livre permitiram estudar em que medida estes factores influenciam a formação das correntes a diferentes profundidades. Os resultados do modelo permitiram fazer uma caracterização geral do padrão de correntes dentro da Enseada do Itapocorói e revelaram a formação de um vórtice na zona Sul da Enseada, que pode ter circulação horária ou anti-horaria consoante a direcção dos ventos incidentes. Identificou-se ainda a influência do vento e da maré na camada superficial da corrente. No entanto, nos locais mais próximos do fundo, a circulação induzida pelo vento tende a desaparecer. ABSTRACT: An investigation that could explain the vortex formation, the circulation of currents and their interaction with the tide and local wind inside the bay beaches, was held on the shores of Itapocorói’s Bay (Alegre and Piçarras), in the north-central coast of Santa Catarina - Brazil. In this context, several campaigns were carried out to measure the currents at different depths, characterize his pattern in the Southern part of the Bay and study the behavior of the local wind. These data were used as 3D model forcing to verify the existence of vortex during the data collection period. Scenarios with different types of wind (constant and uniform) were then simulated and determined the conditions in which the vortex was formed. The data characterizing the wind, elevation of free surface allowed studying how they influence the formation of currents at different depths. The model results have enabled to make a characterization of the general pattern of currents in the Bay of Itapocorói and revealed the vortex formation in the southern part of the Bay, which can have clockwise or counter-clockwise gyre depending on the direction of the incident wind. It was also found the influence of wind and tide in the surface layer of the current, however, closest to the bottom of the movement induced by wind seems to disappear

NEOTROPICAL ALIEN MAMMALS: a data set of occurrence and abundance of alien mammals in the Neotropics

Biological invasion is one of the main threats to native biodiversity. For a species to become invasive, it must be voluntarily or involuntarily introduced by humans into a nonnative habitat. Mammals were among first taxa to be introduced worldwide for game, meat, and labor, yet the number of species introduced in the Neotropics remains unknown. In this data set, we make available occurrence and abundance data on mammal species that (1) transposed a geographical barrier and (2) were voluntarily or involuntarily introduced by humans into the Neotropics. Our data set is composed of 73,738 historical and current georeferenced records on alien mammal species of which around 96% correspond to occurrence data on 77 species belonging to eight orders and 26 families. Data cover 26 continental countries in the Neotropics, ranging from Mexico and its frontier regions (southern Florida and coastal-central Florida in the southeast United States) to Argentina, Paraguay, Chile, and Uruguay, and the 13 countries of Caribbean islands. Our data set also includes neotropical species (e.g., Callithrix sp., Myocastor coypus, Nasua nasua) considered alien in particular areas of Neotropics. The most numerous species in terms of records are from Bos sp. (n = 37,782), Sus scrofa (n = 6,730), and Canis familiaris (n = 10,084); 17 species were represented by only one record (e.g., Syncerus caffer, Cervus timorensis, Cervus unicolor, Canis latrans). Primates have the highest number of species in the data set (n = 20 species), partly because of uncertainties regarding taxonomic identification of the genera Callithrix, which includes the species Callithrix aurita, Callithrix flaviceps, Callithrix geoffroyi, Callithrix jacchus, Callithrix kuhlii, Callithrix penicillata, and their hybrids. This unique data set will be a valuable source of information on invasion risk assessments, biodiversity redistribution and conservation-related research. There are no copyright restrictions. Please cite this data paper when using the data in publications. We also request that researchers and teachers inform us on how they are using the data

Núcleos de Ensino da Unesp: artigos 2008

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq