...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology >Mangrove habitat use by fishes in Southeastern Brazil: are there temporal changes in the structure of the community?
【24h】

Mangrove habitat use by fishes in Southeastern Brazil: are there temporal changes in the structure of the community?

机译：巴西东南部鱼类对红树林栖息地的利用：群落结构是否随时间变化？

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We compared fish community structure in Guaratiba Mangrove, SE Brazil, among three seasons of the hydrological cycle [(i) spring, increasing temperature and rainfall, decreasing salinity; (ii) summer/early fall, high temperature and rainfall, intermediate salinity; (iii) late fall/winter, low temperature and rainfall, high salinity] and between the years 2002-2003 and 2008-2009. The aim was to test the hypothesis that the fish community structure changes seasonally, associated with seasonal changes in environmental conditions, and that changes occurred between the two yearly periods because of increased anthropogenic activities. The sampling protocol for the two surveys was identical. A total of 63 species was recorded, with 38 species occurring in 2002-2003, and 53 species in 2008-2009. The main changes in the mangrove's fish assemblage between 2002-2003 and 2008-2009 were (i) an increase in species richness, fish density and total biomass; and (ii) an increase in the zoobenthivorous species of gerreids Eucinostomus argenteus, Diapterus rhombeus and Ulaema lefroyi, and a decrease in the planktivorous clupeid Harengula clupeola. Other abundant species, such as the opportunistic atherinopsid. Atherinella brasiliensis, the detritivorous mullet Mugil liza and the zoobenthivorous pufferfish Sphoeroides testudineus did not differ in abundance between the two yearly periods. Ten species occurred only in 2002-2003, and 23 species only in 2008-2009, indicating significant changes in community structure over the 6-year period. Seasonal changes in community structure were more conspicuous in 2008-2009, when species abundance and richness were greatest. The highest fish abundance was recorded in spring and in summer/early fall, and the lowest in late fall/winter. The increased abundance and richness over time may be at least partially attributable to protection policies because of the effective implementation of a biological reserve in the area.
机译：我们比较了巴西东南部瓜拉提巴红树林的水生循环三个季节中的鱼类群落结构[（i）春季，温度和降雨增加，盐度降低； （ii）夏季/初秋，高温多雨，盐度中等； （iii）秋末/冬季，低温和降雨，高盐度]以及2002-2003年和2008-2009年之间。目的是检验以下假设：鱼类群落结构随环境条件的季节性变化而季节性变化，并且由于人为活动增加而在两年间发生变化。两次调查的抽样方案是相同的。总共记录了63种，其中2002-2003年发生38种，2008-2009年发生53种。在2002-2003年至2008-2009年期间，红树林鱼类种群的主要变化是：（i）物种丰富度，鱼类密度和总生物量增加； （ii）gerreids Eucinostomus argenteus，Diapterus rhombeus和Ulaema lefroyi的兽基栖动物种类增加，而鳞茎类鳞翅类Harengula clupeola减少。其他丰富的物种，如机会性的斑ino。在两个年度之间，巴西阿瑟氏菌、,鱼穆吉利萨（Mugil liza）和河豚食肉性河豚（Sphoeroides testudineus）的丰度没有差异。仅在2002-2003年间发生了10种，而在2008-2009年间仅发生了23种，表明在这6年中群落结构发生了重大变化。 2008-2009年，群落结构的季节性变化更加明显，当时物种的丰富度和丰富度最大。在春季和夏季/初秋记录的鱼类丰度最高，而在秋末/冬季则最低。随着时间的推移，丰度和丰富度的增加至少可以部分归因于保护政策，因为该地区有效实施了生物保护区。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号