Principles for estimating fish productivity on coral reefs
Principles for estimating fish productivity on coral reefs
复制标题
估算珊瑚礁鱼类生产力的原则
作者：
R. Morais;D. Bellwood
珊瑚礁通过鱼类生产为人类提供主要的营养投入。然而，我们的能力，充分评估鱼类生产力在这些和其他高多样性的水生系统是由于缺乏计算可访问的方法与现实的数据要求。常假定现存生物量反映生物量生产力，但理论和经验证据对这一假设提出质疑。这些方法上的障碍阻碍了管理这一关键珊瑚礁功能的进展，可能危及许多努力应对全球变化的小型热带渔业的未来。在这里，我们总结了导致鱼类生物量生产的生理和生态过程。我们概述了原则，并提出了一个强大的框架，量化鱼类生产力在高多样性的生态系统，克服了这些缺点，通过整合易于访问的个人层面的数据（例如，从视觉计数）与增长轨迹和预测的死亡率。该框架提供了独立于鱼类的多物种鱼类生产力的估计，而不需要指定通常未知的详细营养关系。我们描绘了五个简单的步骤，并提供了一个重要的用户友好的界面（易于使用的R软件包），使鱼类生产力的计算珊瑚礁科学家和管理人员一个方便的工具。
Coral reefs provide major nutritional inputs to humans through fish production. Yet, our capacity to adequately assess fish productivity in these and other high-diversity aquatic systems is hampered by a lack of computationally accessible methods with realistic data requirements. Standing stock biomass is often assumed to reflect biomass productivity, yet theoretical and empirical evidence question this assumption. These methodological hurdles have stymied progress in managing this critical coral reef function, potentially jeopardising the future of many small-scale tropical fisheries struggling to respond to global changes. Here, we summarise the physiological and ecological processes that lead to the production of fish biomass. We outline principles and present a robust framework for quantifying fish productivity in high-diversity ecosystems that overcomes these shortcomings by integrating readily accessible individual-level data (e.g. from visual counts) with growth trajectories and predicted mortality rates. This framework provides fisheries-independent estimates of multispecies fish productivity without the need to specify often unknown detailed trophic relationships. We delineate five simple steps and provide a critical user-friendly interface (an easy-to-use R package) to make the calculation of fish productivity a readily accessible tool for coral reef scientists and managers.