当前位置: X-MOL 学术Mar. Environ. Res. › 论文详情
Non-predatory mortality of planktonic COPEPODS in a reef area influenced by estuarine plume
Marine Environmental Research ( IF 3.445 ) Pub Date : 2020-05-22 , DOI: 10.1016/j.marenvres.2020.105024
Alef Jonathan da Silva; Pedro Augusto Mendes de Castro Melo; Sigrid Neumann-Leitão; Mauro de Melo Júnior

Although it has been proven that non-predatory mortality accounts for a large proportion of copepod mortality, there is still a lack of knowledge of the temporal and spatial patterns and influence of environmental variables on non-predatory mortality, especially in tropical areas where reefs are influenced by estuarine plumes. This study evaluated the percentage of carcasses and the non-predatory mortality rates for planktonic nauplii and copepodites in a bay with the presence of reefs under the influence of an estuarine plume, in the Atlantic tropical region. The average percentage of carcasses was less than 13% for both nauplii and copepodites, and was close to the minimum for other marine environments. However, there was a variation according to the different families and life stages of planktonic copepods. Nauplii had the highest mortality rate, with a mean rate of 0.04 ± 0.02 day−1 (maximum, 0.11 day−1), while the copepodites had a mean of 0.03 ± 0.01 day−1 (maximum of 0.06 day−1). Non-predatory mortality was higher in the rainy season, and differed between the nearby studied areas (bay, plume and reefs). Considering the three areas separately, only the estuarine plume showed higher percentages of carcass and non-predatory mortality rates of nauplii and copepodites. The increase in mortality rates for some copepod families was influenced by high salinity and low values of chlorophyll-a, dissolved oxygen and pH. These results demonstrate that the non-predatory mortality of copepods varies in a complex mosaic of interconnected ecosystems, and that the relationships between environmental variables with some groups may indicate susceptibility of different stages and families to death due to specific environmental conditions.
更新日期:2020-05-22

 

全部期刊列表>>
Springer化学材料学
骄傲月
如何通过Nature平台传播科研成果
跟Nature、Science文章学绘图
隐藏1h前已浏览文章
中洪博元
课题组网站
新版X-MOL期刊搜索和高级搜索功能介绍
ACS材料视界
x-mol收录
南开大学
朱守非
廖良生
郭东升
汪铭
伊利诺伊大学香槟分校
徐明华
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug