Respiration of midges (Diptera; Chironomidae) in British Columbian lakes: oxy-regulation, temperature and their role as palaeo-indicators
Respiration of midges (Diptera; Chironomidae) in British Columbian lakes: oxy-regulation, temperature and their role as palaeo-indicators
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DOI：
10.1111/j.1365-2427.2007.01922.x
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发表时间：
2008-03-01
影响因子：
2.7
通讯作者：
Jensen, Michael Tranekjaer
中科院分区：
文献类型：
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作者：
Brodersen, Klaus Peter;Pedersen, Ole;Jensen, Michael Tranekjaer
1. 测量了 13 个摇蚊类群和 Chaoborus 的比呼吸率，以检验物种调节摄氧量的能力与其在加拿大不列颠哥伦比亚省 9 个研究湖泊中的分布模式之间关系的假设。2．使用带有断点和简单双曲函数的分段线性回归对各个分类群的呼吸模式进行建模。确定了三种类型的呼吸曲线：（i）经典的氧构象（例如滨海角足鱼），随着氧气可用性的降低，无法维持足够的摄氧量； (ii) 氧调节器（例如深摇摇蚊），可以调节和维持恒定的呼吸，直到某个临界点；以及 (iii) 氧应激器 (Micropsectra)，它可以随着氧气可用性的降低而增加呼吸速率，直到达到临界点。3。在两个不同的温度（10 和 20 摄氏度）下测量呼吸，并且在此处研究的氧饱和度条件范围（0-90%）中，平均 Q(10) 值在 1.3 至 2.5.4 之间变化。结果表明，不同的摇蚊类群对低氧浓度具有不同的敏感性，对温度升高的呼吸反应也不同。 6 个类群的临界点增加到较高的氧饱和度，1 个类群的临界点降低，2 个类群的临界点保持不变。5。研究结果通过探索温度和呼吸生理学之间的联系，说明了在古生态学研究中使用摇蚊作为温度和气候指标背后可能的生物学机制之一。
1. The specific respiration rate of 13 chironomid taxa and Chaoborus were measured to test the hypothesis of the relation between a species' ability to regulate their oxygen uptake and their distributional patterns among nine study lakes in British Columbia, Canada.2. Respiration patterns of individual taxa were modelled using piecewise linear regression with break point and simple hyperbolic functions. Three types of respiration curves were identified: (i) classical oxy-conformers (e.g. littoral Cricotopus) which cannot sustain a sufficient oxygen uptake with decreasing oxygen availability; (ii) oxy-regulators (e.g. profundal Chironomus) which can regulate and maintain a constant respiration until a certain critical point and (iii) oxy-stressors (Micropsectra) which increase their respiration rate with decreasing oxygen availability until a critical point.3. Respiration was measured at two different temperatures (10 and 20 degrees C), and over the range of oxygen saturation conditions studied here (0-90%) mean Q(10) values varied from 1.3 to 2.5.4. The results show that different chironomid taxa have varying sensitivity to low oxygen concentrations and different respiratory responses to increased temperature. The critical point increased to higher oxygen saturation for six taxa, decreased for one taxon and was unchanged for two taxa.5. The results illustrate one of the possible biological mechanisms behind the use of chironomids as temperature and climate indicators in palaeoecological studies by exploring the link between temperature and respiration physiology.