Dataset for: Freshwater biogeochemical hotspots: High primary production and ecosystem respiration in shallow waterbodies

This data accompanies the manuscript: "Freshwater biogeochemical hotspots: High primary production and ecosystem respiration in shallow waterbodies" Ponds, wetlands, and shallow lakes (collectively “shallow waterbodies”) are among the most biogeochemically active freshwater ecosystems. Measurements of gross primary production (GPP), respiration (R), and net ecosystem production (NEP) are rare in shallow waterbodies compared to larger and deeper lakes, which can bias our understanding of lentic ecosystem processes. In this study, we calculated GPP, R, and NEP in 26 small, shallow waterbodies across temperate North America and Europe. We observed high rates of GPP (mean 8.4 g O2 m-3 d-1) and R (mean -9.1 g O2 m-3 d-1), while NEP varied from net heterotrophic to autotrophic. Metabolism rates were affected by depth and aquatic vegetation cover, and the shallowest waterbodies had the highest GPP, R, and the most variable NEP. The shallow waterbodies from this study had considerably higher metabolism rates compared to deeper lakes, stressing the importance of these systems as highly productive biogeochemical hotspots.本数据集配套手稿论文：《淡水生物地球化学热点：浅水环境中的高初级生产与生态系统呼吸》。池塘、湿地与浅湖（统称为"浅水环境"）是生物地球化学活性最强的淡水生态系统之一。相较于大型深水湖泊，浅水环境中总初级生产力（Gross Primary Production, 简称GPP）、呼吸作用（Respiration, 简称R）与生态系统净生产力（Net Ecosystem Production, 简称NEP）的实测数据极为匮乏，这可能导致我们对静水生态系统（lentic ecosystem）过程的理解存在偏差。本研究针对北美与欧洲温带区域的26个小型浅水环境，测算得到了其GPP、R与NEP数值。研究观测到极高的GPP与R速率（平均值分别为8.4 g O₂ m⁻³ d⁻¹与-9.1 g O₂ m⁻³ d⁻¹），而NEP则呈现从净异养到净自养的动态变化。代谢速率受水深与水生植被覆盖度影响，其中最浅的水环境拥有最高的GPP与R速率，且NEP的波动幅度最大。本研究中的浅水环境代谢速率远高于深水湖泊，凸显了此类系统作为高生产力生物地球化学热点的重要性。