摘要
为了充分管理半干旱地区脆弱多变的环境,在比人类记录更长的时间尺度上把人类影响与气候或者其他的环境影响区分开来是至关重要的。我们应用孢粉、炭屑、沉积学、地球化学和放射性测年技术方法对西班牙Ebro盆地中部的Salada Chiprana盐湖沉积岩心进行了调查研究。结果表明,全新世晚期季节性的干盐湖在几个世纪以前迅速向永久性盐湖演化。湖沼的发育与农业生产活动变化有关,这就提供了从15世纪以来灌溉对湖泊水量平衡强烈影响的证据。本研究还显示,西班牙唯一的、永久性的、相对较深的、盐化度极高的盐湖是人类与自然景观长期相互作用的产物。
To adequately manage the fragile and changing environments of semiarid regions it is essential to disentangle human from climate or other environmental impacts over longer timescales than human memory. We investigated sediment cores from Salada Chiprana, a saline lake in the central Ebro basin in Spain, using pollen, charcoal, sedimentological, geochemical and radiometric dating techniques. Tne sequence indicates a rapid evolution from an ephemeral playa lake during the Late Holocene to a permanent saline lake a few centuries ago. The limnological evolution correlates with changes in agricultural practices and provides evidence of the strong impact of irrigation on the lake's hydrological balance from the XVth century,the work demonstrates that the Salada Chiprana, the only permanent, relatively deep hypersaline lake in Spain has been created by a long history of human interaction with the landscape.
