Ecosystem oceanography: understanding the dynamics of a changing ocean

生态系统海洋学：了解海洋变化的动态

• 批准号: 312198-2011
• 负责人: Worm, Boris
• 金额: $ 4.66万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=571707
• 关键词: Ecosystem; oceanography; understanding; dynamics; changing

My research helps to gain deeper insights into the causes and consequences of recent changes in marine ecosystems. Over the past years we have seen a dramatic shift in perception, towards the realization that the effects of fishing, climate change and pollution have now become dominant ecological drivers in the ocean. My own research has played a major role in this realization, and these topics are now a growing focus of marine science laboratories around the world. Following these developments, the new discipline of 'ecosystem oceanography' has emerged, with a focus on understanding and predicting global change in the oceans from the bottom to the top of the food web. Much of the recent work in my laboratory has focused on top predators, namely large pelagic fish, sharks, and marine mammals, documenting changes in their abundance and diversity from fisheries data and other sources. Increasingly, however, we are discovering concomitant changes at lower trophic levels, particularly in plankton organisms that provide the base of the marine food web, and that may influence changes at upper levels through trophic interactions. Over the next five years my laboratory will analyze the potentially complex interdependencies of these observed changes in predator and plankton abundance. To gain a comprehensive understanding we will integrate data analysis, field experiments, and modeling approaches. Specifically we will use large, floating mesocoms to test whether climate warming is a major factor in observed changes in phytoplankton abundance, and how this may affect the rest of the food web. We will apply newly developed statistical tools for tracking fish stock abundance and productivity in response to both changes in fishing and resource availability. Finally, we will use these results in the development of realistic ocean-atmosphere models that include important ecological interactions and that provide the capacity to predict future changes in the composition and functioning of marine ecosystems. Taken together, this work will be important for forecasting future ecological changes in the ocean, and to help with an ecosystem-based approach to marine resource management.

我的研究有助于更深入地了解海洋生态系统最近变化的原因和后果。在过去几年中，我们看到人们的看法发生了巨大转变，逐渐认识到捕鱼、气候变化和污染的影响现已成为海洋中主要的生态驱动因素。我自己的研究在实现这一目标方面发挥了重要作用，这些主题现在越来越受到世界各地海洋科学实验室的关注。随着这些发展，“生态系统海洋学”这一新学科应运而生，其重点是了解和预测海洋从食物网底部到顶部的全球变化。我的实验室最近的大部分工作都集中在顶级捕食者上，即大型中上层鱼类，鲨鱼和海洋哺乳动物，从渔业数据和其他来源记录它们的丰度和多样性变化。然而，我们越来越多地发现，在较低的营养层次，特别是在浮游生物，提供了海洋食物网的基础，并可能通过营养相互作用影响到上层的变化伴随的变化。在接下来的五年里，我的实验室将分析这些观察到的捕食者和浮游生物丰度变化的潜在复杂的相互依赖关系。为了获得全面的了解，我们将整合数据分析，现场实验和建模方法。具体来说，我们将使用大型的漂浮中膜来测试气候变暖是否是观测到的浮游植物丰度变化的主要因素，以及这可能如何影响食物网的其他部分。我们将应用新开发的统计工具，跟踪鱼类资源丰度和生产力，以应对捕捞和资源可用性的变化。最后，我们将使用这些结果在现实的海洋-大气模型的发展，包括重要的生态相互作用，并提供能力，以预测未来的变化，在海洋生态系统的组成和功能。总之，这项工作对于预测海洋未来的生态变化和帮助以生态系统为基础的海洋资源管理办法将是重要的。