Aquatic ecosystem mesocosm refers to an artificially constructed near-natural simulation facility in aquatic ecosystem. With aquatic ecosystem mesocosms, experiments on the responses of biological communities can be conducted by controlling physical, chemical and other habitat conditions. Mesocosm experiments can bridge the gap between laboratory experiments and field experiments. Laboratory experiment can only simulate a small number of simple factors, whereas field experimental systems are complex and difficult to conduct controlled experiments. By resear-ching into global long-term mesocosms, we classified them into four types, i.e. flowing type mesocosm, enclosure, land-based simulation pool and mobile experimental tank. The meoscosms gene-rally include physical-biological simulation system, automatic control system, monitoring and analysis system, and central control system. In recent years, aquatic ecosystem research in China has gradually changed from a single environmental factor to the whole ecosystem. We suggest that the construction of the mesocosms in China's aquatic ecosystem should increase the structural complexity and be combined with field in situ monitoring to support large scale simulation.
水生态系统中宇宙指人工构建的河流、湖泊、湿地、海洋等水生态系统近自然模拟装置,可以控制一定的物理、化学要素和生境条件,开展生物群落响应研究。中宇宙实验可以弥补传统实验室小型装置模拟要素过于简单,而野外现实系统复杂不可控制和难以开展对比实验的局限。本文列举了当前国际上多个科研机构长期运行的水生态系统中宇宙,将其归纳为流水型中宇宙、围隔装置、陆基模拟池、移动式水槽4类,各类中宇宙一般包括物理-生物模拟系统、自动调控系统、监测分析系统、中央控制系统。近年来,我国水生态系统的研究逐渐从单一环境要素向生态系统整体转变,对中宇宙模拟实验的需求愈加迫切。建议我国水生态系统中宇宙建设应提高结构复杂性,并与野外现场监测相结合,共同支撑更大尺度系统的整体模拟。.
Keywords: aquatic ecosystem; mesocosm; simulation facilities.