Riparian zones provide multiple benefits, including streambank stabilization and nutrient abatement. However, there is a knowledge gap on how the type of vegetation and environmental factors (e.g., soil temperature, moisture) within the riparian zone influence CO₂ and CH₄ emissions. Our objective was to quantify and compare CO₂ and CH₄ emissions from a herbaceous (grass) riparian zone (GRS), a rehabilitated riparian zone composed of deciduous trees, an undisturbed natural forested riparian zone with deciduous trees (UNF-D) or coniferous trees (UNF-C), and an agricultural field. Cumulative soil CO₂ emission ranged from 23 to 105 g CO₂–C m^–2. Carbon dioxide emissions were greatest (p < .05) in the GRS zone and lowest (p < .05) in the UNF-C riparian zone. The best predictors for CO₂ emissions were soil temperature and soil organic carbon (SOC) content. Cumulative CH₄ emission ranged from –23 to 253 g CH₄–C m^–2. Methane emissions were greatest (p < .05) in the UNF-D and lowest (p < .05) in the GRS riparian zone. The best predictors for CH₄ emissions were soil moisture, SOC, and photosynthetic photon flux density. The total CO₂–C equivalent (i.e., CH₄ + CO₂) was greatest (p < .05) for the GRS and lowest (p < .05) for the UNF-C riparian zone. The environmental factors controlling CO₂ and CH₄ emissions within the various riparian zones did not change; instead, changes were due to how vegetation within riparian zones influenced these controls.

中文翻译：

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河岸带温室气体排放与植被类型和环境因素有关

河岸带提供多种好处，包括河岸稳定和养分减少。然而，关于河岸带内的植被类型和环境因素（例如土壤温度、湿度）如何影响 CO ₂和 CH ₄排放存在知识空白。我们的目标是量化和比较草本（草）河岸带 (GRS)、由落叶树组成的修复河岸带、未受干扰的天然森林河岸带落叶树 (UNF-D) 或针叶树的CO ₂和 CH ₄排放量。树木 (UNF-C) 和农田。累积土壤 CO ₂排放范围为 23 至 105 g CO ₂ –C m ^–2. 二氧化碳的排放量是最大的（p 在GRS区<0.05）和最低（p 在UNF-C河岸区<0.05）。CO ₂排放的最佳预测因子是土壤温度和土壤有机碳 (SOC) 含量。累积 CH ₄排放范围为 –23 至 253 g CH ₄ –C m ^–2。 UNF-D 的甲烷排放量最大 ( p <  .05)，而 GRS 河岸区的甲烷排放量最低 ( p < .05)。CH ₄排放的最佳预测因子是土壤湿度、SOC 和光合光子通量密度。总 CO ₂ –C 当量（即 CH ₄ + CO ₂）为最大（p  <0.05）为GRS和最低（p  <0.05）为UNF-C河岸带。控制各河岸带内CO ₂和CH ₄排放的环境因素没有变化；相反，变化是由于河岸带内的植被如何影响这些控制。