da Silva D R, Paranhos R, Vianna M
Federal University of Rio de Janeiro, Institute of Biology, Department of Marine Biology, Laboratory of Fisheries Biology and Technology, CCS, Bl. A, 21949-900, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, Brazil.
Federal University of Rio de Janeiro, Institute of Biology, Department of Marine Biology, Laboratory of Hydrobiology, CCS, Bl. A, 21949-900, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, Brazil.
J Fish Biol. 2016 Jul;89(1):821-46. doi: 10.1111/jfb.13033.
This study focused on the influence of local-scale environmental factors on key metrics of fish community structure and function at Guanabara Bay, an estuarine system that differs from all other south-western Atlantic estuaries due to the influence of an annual low-intensity upwelling event during late spring and summer, between November and March, when a warm rainy climate prevails. The spatial patterns of the bottom temperature and salinity were more heterogeneous during the rainy season than the dry season, being linked to total precipitation and seasonal oceanographic events. The study identified 130 species and 45 families, placing Guanabara Bay as one of the most species-rich tropical estuarine ecosystems, far exceeding 22 other Brazilian estuaries. These results, in addition to characteristics such as a relatively well-preserved mangrove forest, high productivity and favourable conditions for the growth and reproduction of estuarine species, indicate that Guanabara Bay plays a central role in supporting large populations of fishes, including commercially important species.
本研究聚焦于局部尺度环境因素对瓜纳巴拉湾鱼类群落结构和功能关键指标的影响。瓜纳巴拉湾是一个河口系统，与西南大西洋的所有其他河口不同，因为在晚春和夏季（11月至次年3月）盛行温暖多雨气候时，每年会发生一次低强度上升流事件。雨季期间，底部温度和盐度的空间格局比旱季更加不均匀，这与总降水量和季节性海洋事件有关。该研究识别出130个物种和45个科，使瓜纳巴拉湾成为物种最丰富的热带河口生态系统之一，远远超过巴西其他22个河口。这些结果，再加上相对保存完好的红树林、高生产力以及有利于河口物种生长和繁殖的条件等特征，表明瓜纳巴拉湾在支持大量鱼类种群（包括具有商业重要性的物种）方面发挥着核心作用。
