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Mortality of zooplankton in lake ecosystems and its contribution to vertical carbon fluxes (ZooFlux)

湖泊生态系统中浮游动物的死亡率及其对垂直碳通量的贡献（ZooFlux）

基本信息

批准号：
319532628
负责人：
Professor Dr. Hans-Peter Grossart
金额：
--
依托单位：
Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/319532628?language=en
关键词：
Mortality zooplankton lake ecosystems its

项目摘要

The objective of the proposed study is to quantifying the role of dead zooplankton (carcasses) in the carbon cycle of aquatic ecosystems. Thereby, we will test the hypothesis that microbial degradation of carcasses during their sinking facilitates (primes) the degradation of more refractory organic matter. The project is part of the joint effort of a research team from Germany and Russia. In order to estimate the contribution of zooplankton carcasses to the carbon cycle, we combine field observations, mesocosm and laboratory experiments as well as modeling. In situ estimations of the zooplankton mortality and sinking rates by sediment traps in the lakes will be accompanied by measurements of turbulent mixing conditions across the stratified water column using modern hydrodynamic field techniques. Laboratory experiments will quantify microbial colonization and degradation rates of zooplankton carcasses. Both field and laboratory data will be used for an advanced model predicting retention time of carcasses in the water column and their contribution to the carbon cycle. Various model scenarios will focus on the role of environmental factors for settling and degradation of dead zooplankton and on potential changes due to climate-driven hypolimnion warming in lakes.

拟议研究的目的是量化死亡浮游动物（尸体）在水生生态系统碳循环中的作用。因此，我们将测试的假设，即微生物降解的尸体在其下沉促进（总理）更难降解的有机物。该项目是来自德国和俄罗斯的研究小组共同努力的一部分。为了估计浮游动物尸体对碳循环的贡献，我们结合联合收割机现场观测，围隔和实验室实验以及模拟。在现场估计浮游动物的死亡率和沉积物陷阱在湖泊中的下沉率将伴随着使用现代水动力场技术的分层水柱的湍流混合条件的测量。实验室实验将量化浮游动物尸体的微生物定植和降解率。现场和实验室数据将用于一个先进的模型，预测尸体在水柱中的停留时间及其对碳循环的贡献。各种模型设想方案将侧重于环境因素对浮游动物尸体沉降和降解的作用，以及气候驱动的湖泊低水层变暖可能造成的变化。