Medeiros A M A, Barbosa J E L, Medeiros P R, Rocha R M, Silva L F
Departamento de Sistemática e Ecologia, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, João Pessoa, PB, Brazil.
Braz J Biol. 2010 Aug;70(3):551-7. doi: 10.1590/s1519-69842010000300011.
The present study aimed at evaluating differences in rotifer distribution in three estuarine zones in an inverse estuary located in the Semiarid Region of Brazil. Zones were chosen based on their proximity to the ocean and river border as a means of reflecting a horizontal salinity gradient. High freshwater discharge during the rainy season was the major determinant of rotifer composition. On the other hand, due to higher salinity values during the dry season, very low values of species richness and abundance were observed in all zones. Therefore, the study highlights the constraints of salinity and the positive influence of seasonality and river proximity on rotifer species in a semiarid estuarine environment.
本研究旨在评估巴西半干旱地区一个逆河口三个河口区域内轮虫分布的差异。这些区域是根据它们与海洋和河流边界的接近程度来选择的，以此反映水平盐度梯度。雨季期间大量淡水排放是轮虫组成的主要决定因素。另一方面，由于旱季盐度值较高，在所有区域都观察到物种丰富度和丰度的值非常低。因此，该研究突出了盐度的限制以及季节性和靠近河流对半干旱河口环境中轮虫物种的积极影响。
