Leite Natália da R, Andrade Thamara, Silva Leiliane, Costa Ádila K R da, Oliveira Antonio R G de, Magalhães André, Flores-Montes Manuel, Pereira Luci C C, Costa Rauquírio Marinho da
Institute of Coastal Studies, Laboratory of Plankton and Microalgal Culture, Universidade Federal do Pará - UFPA, Alameda Leandro Ribeiro, Bragança, PA, 68600-000, Brazil.
Institute of Coastal Studies, Laboratory of Coastal and Estuarine Oceanography, Universidade Federal do Pará - UFPA, Alameda Leandro Ribeiro, Bragança, PA, 68600-000, Brazil.
Mar Environ Res. 2023 Oct;191:106148. doi: 10.1016/j.marenvres.2023.106148. Epub 2023 Aug 16.
The dynamics of the copepods A. tonsa and A. lilljeborgii were described for the first time in the Taperaçu Estuary. The acartiids were collected using plankton nets (200 μm) in June 2012, March 2013 (rainy season) and September 2012 and 2013 (dry season). The oscillations in rainfall and the fluctuations in hydrological variables influenced the abundance, biomass, and production of both A. tonsa (17 ± 23 to 8501 ± 13,248 ind.m; 16,385.29 mg.C.m; 0.09 ± 0.21 to 355.17 ± 590.84 mg.C.m.d) and A. lilljeborgii (14 ± 11 to 1470 ± 1591 ind.m; 22,398.40 mg.C.m; 177.99 ± 263.13 mg.C.m.d) with clear monthly, seasonal, and spatial patterns. The high levels of production observed may be related to the presence of waters rich in particulate organic material derived from the adjacent mangrove forests. This material is consumed by a number of copepod species, in particular A. tonsa and A. lilljeborgii, favoring the development and reproduction of both species which are characterized by high rates of productivity in the study estuary. The present results indicate that the biomass and productivity in equatorial mangrove estuaries may be relatively high in comparison with the levels observed in other coastal systems around the world and that earlier stages of both species have a great relevance for biomass and production in Amazonian estuaries.
在塔佩拉苏河口首次描述了桡足类动物汤氏纺锤水蚤（Acartia tonsa）和利氏纺锤水蚤（Acartia lilljeborgii）的动态变化。2012年6月、2013年3月（雨季）以及2012年9月和2013年9月（旱季），使用浮游生物网（200微米）采集了猛水蚤类。降雨的波动和水文变量的变化影响了汤氏纺锤水蚤（个体数为17±23至8501±13248个/立方米；碳含量为16385.29毫克/立方米；摄食率为0.09±0.21至355.17±590.84毫克碳/立方米·天）和利氏纺锤水蚤（个体数为14±11至1470±1591个/立方米；碳含量为22398.40毫克/立方米；摄食率为177.99±263.13毫克碳/立方米·天）的丰度、生物量和产量，呈现出明显的月度、季节和空间模式。观察到的高产量水平可能与源自相邻红树林的富含颗粒有机物质的水体的存在有关。这种物质被许多桡足类物种消耗，特别是汤氏纺锤水蚤和利氏纺锤水蚤，有利于这两个物种的发育和繁殖，它们在研究河口的特点是具有高生产率。目前的结果表明，与世界其他沿海系统观察到的水平相比，赤道红树林河口的生物量和生产力可能相对较高，并且这两个物种的早期阶段对亚马逊河口的生物量和产量具有重要意义。
