Arctic Species Trend Index (ASTI) : Freshwater

The Circumpolar Biodiversity Monitoring Program, a cornerstone programme of the Conservation of Arctic Flora and Fauna (CAFF), Arctic Council working Group is an international network of scientists, government agencies, Indigenous organizations and conservation groups working together to harmonize and integrate efforts to monitor the Arctic's living resources.CBMP experts are developing four coordinated and integrated Arctic Biodiversity Monitoring Plans to help guide circumpolar monitoring efforts. Results will be channeled into effective conservation, mitigation and adaptation policies supporting the Arctic. These plans represent the Arctic's major ecosystems(Marine, Freshwater, Coastal, Terrestrial).

It is important that monitoring programs develop the most effective reporting strategies if they are to inform decision making. To facilitate effective and consistent reporting, the CBMP has chosen a suite of indices and indicators that provide a comprehensive picture of the state of Arctic biodiversity – from species to habitats to ecosystem processes to ecological services. These indices and indicators are developed in a hierarchical manner, allowing users to drill down into the data from the higher-order indices to more detailed indicators. These are being developed through an expert consultation process.

The Arctic Species Trend Index (ASTI) is part of this suite of indicators and indices developed by CAFFs CBMP. It tracks trends in over 300 Arctic vertebrate species and comprises the Arctic component of the Living Planet Index. It is important to identify how wildlife and ecosystems are changing in order to develop effective conservation and adaptation strategies in the Arctic, an environment undergoing dramatic changes. The ASTI describes overall trends across species, taxonomy, ecosystems, regions and other categories.

极地生物多样性监测计划（Circumpolar Biodiversity Monitoring Program，简称CBMP），作为北极植物与动物保护（Conservation of Arctic Flora and Fauna，简称CAFF）的核心项目，以及北极理事会工作组的一部分，是一个由科学家、政府机构、原住民组织和保护团体组成的国际网络。该网络携手合作，旨在协调和整合对北极生物资源的监测工作。CBMP专家正在制定四个协调一致且相互融合的北极生物多样性监测计划，以指导环极地区的监测工作。监测结果将被纳入有效的保护、缓解和适应政策中，以支持北极地区的发展。这些计划涵盖了北极的主要生态系统（海洋、淡水、沿海和陆地）。

监测计划若要为决策提供信息，发展最有效的报告策略至关重要。为了促进有效且一致的报告，CBMP选择了一套指标和指数，这些指标和指数提供了对北极生物多样性状态的全面图景——从物种到栖息地，再到生态系统过程和生态服务。这些指标和指数以层级结构开发，使用户能够从较高层次的指标深入到更详细的指标。这些指标和指数的开发是通过专家咨询过程进行的。

北极物种趋势指数（Arctic Species Trend Index，简称ASTI）是CAFF的CBMP开发的一套指标和指数的一部分。它跟踪超过300种北极脊椎动物的趋势，并构成了生物星球指数的北极部分。在经历剧烈变化的北极环境中，为了制定有效的保护和适应策略，识别野生动物和生态系统的变化至关重要。ASTI描述了物种、分类学、生态系统、地区和其他类别中的总体趋势。