Alteration of Chironomus plumosus ventilation activity and bioirrigation-mediated benthic fluxes by changes in temperature, oxygen concentration, and seasonal variations
Alteration of Chironomus plumosus ventilation activity and bioirrigation-mediated benthic fluxes by changes in temperature, oxygen concentration, and seasonal variations
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DOI：
10.1899/11-043.1
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发表时间：
2012-06-01
影响因子：
1.8
通讯作者：
Lewandowski, Joerg
中科院分区：
文献类型：
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作者：
Roskosch, Andrea;Hette, Nicolas;Lewandowski, Joerg
穴居底栖生物促进水和溶质穿过沉积物-水界面的通量。水和溶质穿透洞穴壁，并在生物体用上覆水冲洗洞穴时被运入/运出沉积物。很少有研究已经做了调查在不断变化的环境条件下的生物灌溉。我们实验量化生物灌溉摇蚊plumosus幼虫在实验室中的3个范围内的O-2饱和度（低，中和高O-2浓度），2个温度（10和20摄氏度），并在不同的季节。我们测量通风活动与O-2和流速微传感器，流速在抽水期间与颜色示踪剂，抽水率与电导率交换实验，并通过流入量测定（氯化钠是示踪剂在后面的两个实验）的平流和扩散水流入沉积物的速率。氧饱和度
Burrowing benthic organisms promote water and solute fluxes across the sediment-water interface. Water and solutes penetrate the burrow walls and are transported into/out of the sediment when organisms flush their burrows with overlying water. Few studies have been done to investigate bioirrigation under shifting environmental conditions. We experimentally quantified bioirrigation by Chironomus plumosus larvae in the laboratory at 3 ranges of O-2 saturation (low, medium, and high O-2 concentrations), 2 temperatures (10 and 20 degrees C), and over different seasons. We measured ventilation activities with O-2 and flow-velocity microsensors, flow velocities during pumping periods with color tracers, pumping rates with conductivity exchange experiments, and rates of advective and diffusive water influx into the sediment by influx assays (NaCl was the tracer in both latter experiments). O-2 saturations