Primary production across a coastal wetland landscape in Louisiana, U.S.A. above- and belowground primary production (2012-2014) data

Above- and belowground production in coastal wetlands are important contributors to carbon accumulation and ecosystem sustainability. As sea level rises, we can expect shifts to more salt-tolerant communities, which may alter these ecosystem functions and services. Although the direct influence of salinity on species-level primary production has been documented, we lack an understanding of the landscape-level response of coastal wetlands to increasing salinity. What are the indirect effects of sea-level rise, i.e. how does primary production vary across a landscape gradient of increasing salinity that incorporates changes in wetland type? We measured above- and belowground production in four wetland types that span an entire coastal gradient from fresh to saline marsh.

滨海湿地的地上与地下初级生产力（primary production），是碳积累与生态系统可持续性维持的重要支撑因素。随着海平面上升，滨海湿地群落将向更耐盐的类群转变，这可能改变其生态系统功能与服务。尽管盐度（salinity）对物种水平初级生产力的直接影响已有研究记录，但我们目前仍缺乏对滨海湿地在景观尺度（landscape-level）上响应盐度升高机制的认知。那么海平面上升存在哪些间接影响？换言之，在涵盖湿地类型变化的盐度升高景观梯度中，初级生产力会呈现怎样的空间变异特征？本研究选取覆盖从淡水沼泽至咸水沼泽完整滨海盐度梯度的四类湿地，测定了其地上与地下初级生产力。