Araújo Francisco Gerson, Pinto Samara Macedo, Neves Leonardo Mitrano, de Azevedo Márcia Cristina Costa
Laboratorio de Ecologia de Peixes, Universidade Federal Rural do Rio de Janeiro, BR 465, Km 7, 23.890-000 Seropédica, Rio de Janeiro, Brazil.
Laboratorio de Ecologia de Peixes, Universidade Federal Rural do Rio de Janeiro, BR 465, Km 7, 23.890-000 Seropédica, Rio de Janeiro, Brazil.
Mar Pollut Bull. 2017 Jan 15;114(1):102-113. doi: 10.1016/j.marpolbul.2016.08.063. Epub 2016 Sep 8.
We assessed inter-annual changes in fish assemblages of a tropical bay which experienced a heavily industrialized process in the last decades. A highly significant difference in community structure among the bay zones, and a decrease in fish richness and abundance over time were found. Changes in fish richness and abundance between the two first (1987-1988 and 1993-1995) and the two latter time periods (1998-2001 and 2012-2013) were sharpest in the inner bay zone, the most impacted bay area, and in the middle zone, whereas the outer zone remained comparatively stable over time. These changes coincided with increased metal pollution (mainly, Zn and Cd) in the bay and with the enlargement of the Sepetiba Port. Spatial changes in the fish community structure among the bay zones were related to differences in salinity, transparency and depth with this latter variable acting as a buffer stabilizing temporal community changes.
我们评估了一个热带海湾鱼类群落的年际变化，该海湾在过去几十年经历了高度工业化进程。研究发现，海湾不同区域的群落结构存在极显著差异，并且随着时间推移鱼类丰富度和数量有所下降。在最初的两个时间段（1987 - 1988年和1993 - 1995年）与后两个时间段（1998 - 2001年和2012 - 2013年）之间，鱼类丰富度和数量的变化在内湾区域（受影响最大的海湾区域）和中间区域最为明显，而外湾区域随时间相对保持稳定。这些变化与海湾中金属污染（主要是锌和镉）增加以及塞佩蒂巴港的扩建同时发生。海湾不同区域鱼类群落结构的空间变化与盐度、透明度和深度的差异有关，其中深度这一变量起到缓冲作用，稳定了群落的时间变化。
