Physiological match and mismatch in climate dependent distribution of boreal marine invertebrates

北海无脊椎动物气候依赖性分布的生理匹配和不匹配

• 批准号: 5429953
• 负责人: Professor Dr. Rüdiger J. Paul
• 金额: --
• 依托单位: Alfred-Wegener-Institut (AWI) Helmholtz-Zentrum für Polar- und Meeresforschung
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5429953?language=en
• 关键词: Physiological; match; mismatch; climate; dependent

The physiological mechanisms, by which temperature and its oscillations shape biogeography, species survival, and energy expenditure for growth are addressed as crucial elements of climate effects on ecosystems. Such climate dependent physiological patterns are most adequately identified in marine aquatic species which cover wide latitudinal clines in temperate zones (Northern hemisphere). Each population of these species (frequently genetically different from neighbouring populations) is adapted to a specific climate regime on a gradient between warm and cold climates and the associated seasonal and inter-annual variability of its physical environment. Comparison of populations of the lugworm Arenicola marina is intended for a comprehensive identification and quantification of physiological processes sensitive to climate change. The adjustment of oxygen supply versus demand appears most crucial in thermal adaptation; therefore components of the oxygen transfer system, like haemoglobin functional properties, blood and tissue oxygenation, as well as parameters setting oxygen demand and organismic performance will be investigated in populations from the Atlantic, the North and White Seas. For each of those populations, climate oscillations beyond previous optima may lead them to the limits of their adaptational capacity, to be identified as a mismatch in demand vs supply capacities. Based on such physiological studies a cause and effect understanding is expected, how climate factors, molecular and cellular design as well as physiological and ecological performance are interrelated. Identification of the unifying trade-offs and constraints involved in thermal adaptation likely contributes to an understanding of how climate gradients and their oscillations shape ecosystem functioning during climate change scenarios.

温度及其振荡塑造地理学、物种生存和生长能量消耗的生理机制是气候对生态系统影响的关键因素。这种依赖于气候的生理模式在温带（北方）覆盖广泛纬度梯度的海洋水生物种中得到最充分的鉴定。这些物种的每一种群（往往在遗传上与邻近种群不同）都适应于一种特定的气候状况，即温暖和寒冷气候之间的梯度以及其物理环境的相关季节性和年际变化。比较沙蚕Arenicola marina的种群是为了全面识别和量化对气候变化敏感的生理过程。氧气供应与需求的调整似乎是最重要的热适应，因此，组件的氧传输系统，如血红蛋白的功能特性，血液和组织的氧合，以及参数设置的氧气需求和器官性能将在人口从大西洋，北海和白色海进行调查。对于这些人口中的每一个，气候波动超过以前的最佳可能导致他们的适应能力的限制，被确定为需求与供应能力的不匹配。基于这样的生理学研究的原因和影响的理解是预期的，如何气候因素，分子和细胞的设计以及生理和生态性能是相互关联的。确定热适应所涉及的统一权衡和制约因素可能有助于理解气候梯度及其振荡如何在气候变化情景期间塑造生态系统功能。