Correa Sandra Bibiana, van der Sleen Peter, Siddiqui Sharmin F, Bogotá-Gregory Juan David, Arantes Caroline C, Barnett Adrian A, Couto Thiago B A, Goulding Michael, Anderson Elizabeth P
Mississippi State University, USA.
Wageningen University and Research Centre, The Netherlands.
Bioscience. 2022 Jun 22;72(8):753-768. doi: 10.1093/biosci/biac038. eCollection 2022 Aug.
Riverine floodplains are biologically diverse and productive ecosystems. Although tropical floodplains remain relatively conserved and ecologically functional compared to those at higher latitudes, they face accelerated hydropower development, climate change, and deforestation. Alterations to the flood pulse could act synergistically with other drivers of change to promote profound ecological state change at a large spatial scale. State change occurs when an ecosystem reaches a critical threshold or tipping point, which leads to an alternative qualitative state for the ecosystem. Visualizing an alternative state for Amazonian floodplains is not straightforward. Yet, it is critical to recognize that changes to the flood pulse could push tropical floodplain ecosystems over a tipping point with cascading adverse effects on biodiversity and ecosystem services. We characterize the Amazonian flood pulse regime, summarize evidence of flood pulse change, assess potential ecological repercussions, and provide a monitoring framework for tracking flood pulse change and detecting biotic responses.
河流洪泛区是生物多样性丰富且具有生产力的生态系统。尽管与高纬度地区的洪泛区相比，热带洪泛区相对保持完好且具有生态功能，但它们面临着水电开发加速、气候变化和森林砍伐等问题。洪水脉冲的改变可能与其他变化驱动因素协同作用，在大空间尺度上促使生态状态发生深刻变化。当生态系统达到临界阈值或临界点时，就会发生状态变化，这会导致生态系统进入另一种质性状态。设想亚马逊洪泛区的另一种状态并非易事。然而，至关重要的是要认识到，洪水脉冲的变化可能会使热带洪泛区生态系统越过临界点，对生物多样性和生态系统服务产生连锁不良反应。我们描述了亚马逊洪水脉冲状况，总结了洪水脉冲变化的证据，评估了潜在的生态影响，并提供了一个监测框架，用于跟踪洪水脉冲变化和检测生物反应。
