Modeling sinking rate of zooplankton carcasses: Effects of stratification and mixing
Modeling sinking rate of zooplankton carcasses: Effects of stratification and mixing
复制标题
DOI：
10.4319/lo.2012.57.3.0881
复制
发表时间：
2012-05-01
影响因子：
4.5
通讯作者：
Tang, Kam W.
中科院分区：
文献类型：
--
作者：
Kirillin, Georgiy;Grossart, Hans-Peter;Tang, Kam W.
利用实验室测定的几种淡水浮游动物的尸体下沉速率和密度，建立了受湍流和层结影响的浮游动物尸体下沉模型。该模型随后被用来估计浮游动物尸体在水柱的Stechlin湖，一个典型的温带dimitic湖在德国东北部的停留时间。不同物种的停留时间不同，并强烈影响热分层。在夏季分层的高峰期，尸体停留长达5天，在70米深的水柱到达湖底之前。浮游动物尸体的停留时间足够长，可以作为一个重要的物质和能源的细菌在湖泊的水层区，因此有可能显着影响水生碳和营养循环。所提出的沉降速率模型，基于物理上合理的关系，可以很容易地应用到其他被动沉降颗粒，并集成到大型生态系统模型。
Using the carcass sinking rate and density determined in laboratory for several freshwater zooplankton species, we developed a model of zooplankton carcass sinking as affected by turbulence and stratification. The model was subsequently used to estimate the residence time of zooplankton carcasses in the water column of Lake Stechlin, a typical temperate dimictic lake in northeastern Germany. The residence time varied among the different species and was strongly affected by thermal stratification. At the peak of summer stratification, the carcasses stayed up to 5 d in the 70 m-deep water column before reaching the lake bottom. Residence time was long enough that zooplankton carcasses could serve as an important matter and energy source for bacteria in the lake's pelagic zone and hence have the potential to significantly affect aquatic carbon and nutrient cycling. The proposed model of sinking rates, based on physically sound relationships, can be easily applied to other passively sinking particles, and be integrated into large ecosystem models.