来自康涅狄格州水体的大口度的时空变化,1995-2021年
Christopher J Sullivan1, Jason C Vokoun2, Christopher R Perkins3
1Department of Natural Resources and the Environment, Wildlife and Fisheries Conservation Center, University of Connecticut, 1376 Storrs Road, Storrs, CT, 06269-4087, USA. cjbsullivan2@gmail.com.
Environmental monitoring and assessment
|May 31, 2023
概括
康涅狄格州的大嘴巴的含量整体下降,但随着时间的推移显示出更大的变化. 鱼的长度影响了风险,不同地区和采样时期的概率各不相同.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 渔业 科学 渔业 科学
背景情况:
- 鱼类中的污染对野生动物和人类健康构成风险.
- 鱼 (Micropterus salmoides) 是水生生态系统健康的一个关键指标物种.
- 了解鱼类中的趋势对于风险评估和管理至关重要.
研究的目的:
- 为了评估度的时空变化和大嘴的变化.
- 评估康涅狄格州不同生态区域和时间段的污染趋势.
- 为了确定鱼类大小和含量之间的关系.
主要方法:
- 对来自康涅狄格州56个水体的度分析,跨越三个时间段 (1995,2005-2006,2019-2021年).
- 计算度的平均值和变化系数 (CV).
- 对鱼的总长度 (TL) 进行度调整.
主要成果:
- 超过美国环境保护局 (USEPA) 标准 (≥0.30μg g-1 ww) 的情况从1995年的75.1%下降到2019-2021年的47.7%.
- 经TL调整后的度普遍下降,但在2005-2006年至2019-2021年期间,西北山脉/高地生态区域的度增加.
- 经TL调整的度的CV从1995年的25.78%增加到2019-2021年的36.47%.
- 的概率与鱼类TL增加,长度值因生态区域和时期而异.
结论:
- 尽管总体下降,但大口的时间和空间变化突出了复杂的影响因素.
- 个人行为,食物网动态,湖泊特征和遗留等因素有助于模式.
- 增加的差异表明需要进行细微的风险评估,考虑到个体鱼类的特征和当地环境条件.
相关概念视频
01:26Derivatives: Problem Solving
Temperature-Dependent Growth of Brook TroutThe growth of brook trout is closely influenced by water temperature. Experimental data demonstrate how trout weight changes over a 24-day period in response to varying water temperatures. At lower temperatures, such as 15.5 degrees Celsius, brook trout show significant weight gain. However, as the temperature increases, the amount of weight gained steadily decreases. At the highest temperature measured, 24.4 degrees Celsius, trout experience a net...
01:24Freshwater Microbial Ecology
Freshwater systems such as streams, rivers, and lakes exhibit distinct physical and biological characteristics that influence their microbial communities. These environments are broadly categorized into lotic systems—those with flowing waters like streams and most rivers—and lentic systems, which include still or slow-moving waters such as lakes, ponds, and marshes.In lentic systems, phytoplankton drive primary production, generating autochthonous organic carbon. In contrast, lotic systems...