Respiration flumes for studies of comparative energetics

在海洋和淡水环境中，溶解气体的浓度在短期内会因温度升高或暴露于环境污染物等压力因素而发生变化。我们的小组研究现代动物对不同程度的溶解气体的耐受性，以了解它们适应当今不同压力源的能力。在地球的历史进程中，海洋中溶解气体的浓度也发生了变化，因此我们对现代动物对低氧水平的耐受性的研究可以用来推断第一批动物可能耐受的环境，从而推断它们的样子。在本提案中，我们要求为一套流量室提供资金，用于在温度和流量控制的环境中测量水生动物的呼吸。该设备将允许我们的6名学生和pdf测量环境舱（大小从半毫升到30升）中氧气和二氧化碳交换对各种动物的影响，包括海绵和鱼类，胚胎，幼崽和成年动物。这些水流将提供有关动物对水环境变化的阈值的数据。这些数据将有助于重建地球上动物和生态系统的历史。这些数据还将被联邦、省和地区政府用于建立有效的海洋和淡水生态系统管理。＊＊＊＊＊

In marine and freshwater environments concentrations of dissolved gases can change over the short term in response to stressors such as increased temperature or exposure to environmental pollutants. Our groups study how tolerant modern animals are to different levels of dissolved gases in order to understand their ability to adapt to different stressors today. Concentrations of dissolved gases in the oceans have also changed in the course of the Earth's history, so our studies of the tolerance of modern animals to lower levels of oxygen can be used to infer what the first animals may have tolerated, and therefore what they may have looked like. In this proposal we request funds for a set of flow chambers to measure respiration in aquatic animals in a temperature- and flow-controlled environment. This equipment will allow our six students and PDFs to measure the impact of the exchange of oxygen and carbon dioxide in environmental chambers (ranging in size from half a millilitre to 30 litres) on animals as diverse as sponges and fish, and in embryos, juveniles and adults. The flow flumes will provide data on the thresholds of animals to changes in their water environment. These data will help reconstruct the history of animals and ecosystems on Earth. The data will also be used by federal, provincial and regional governments to establish effective management of marine and freshwater ecosystems today. *****