The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China.
The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China.
Mar Pollut Bull. 2017 Nov 30;124(2):736-742. doi: 10.1016/j.marpolbul.2017.01.024. Epub 2017 Jan 21.
We examined spatiotemporal variations of metal levels and three growth related biomarkers, i.e., RNA/DNA ratio (RD), total energy reserve (Et) and condition index (CI), in green-lipped mussels Perna viridis transplanted into five locations along a pollution gradient in the marine environment of Hong Kong over 120days of deployment. There were significant differences in metal levels and biomarker responses among the five sites and six time points. Mussels in two clean sites displayed better CI and significantly lower levels of Ag, Cu, Pb and Zn in their tissues than the other sites. Temporal patterns of RD in P. viridis were found to be site-specific. Across all sites, Et decreased in P. viridis over the deployment period, though the rate of decrease varied significantly among the sites. Therefore, temporal variation of biomarkers should be taken to consideration in mussel-watch programs because such information can help discriminate pollution-induced change from natural variation.
我们研究了金属水平和三个与生长相关的生物标志物，即 RNA/DNA 比（RD）、总能量储备（Et）和条件指数（CI），在香港海洋环境中沿污染梯度移植到五个位置的绿唇贻贝（Perna viridis）中的时空变化。在 120 天的部署期间，五个地点和六个时间点的金属水平和生物标志物反应存在显著差异。两个清洁地点的贻贝表现出更好的 CI，其组织中的 Ag、Cu、Pb 和 Zn 水平明显低于其他地点。发现绿唇贻贝（P. viridis）的 RD 时间模式具有特定于地点的特征。在所有地点，P. viridis 的 Et 在部署期间减少，尽管减少率在各地点之间差异很大。因此，在贻贝监测计划中应考虑生物标志物的时间变化，因为此类信息可以帮助区分由污染引起的变化与自然变化。
