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首页> 外文期刊>Forests >Carbon Sequestration and Sedimentation in Mangrove Swamps Influenced by Hydrogeomorphic Conditions and Urbanization in Southwest Florida
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Carbon Sequestration and Sedimentation in Mangrove Swamps Influenced by Hydrogeomorphic Conditions and Urbanization in Southwest Florida

机译：佛罗里达西南部水文地理条件和城市化对红树林沼泽碳固存和沉积的影响

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This study compares carbon sequestration rates along two independent tidal mangrove creeks near Naples Bay in Southwest Florida, USA. One tidal creek is hydrologically disturbed due to upstream land use changes; the other is an undisturbed reference creek. Soil cores were collected in basin, fringe, and riverine hydrogeomorphic settings along each of the two tidal creeks and analyzed for bulk density, total organic carbon profiles, and sediment accretion. Radionuclides 137 Cs and 210 Pb were used to estimate recent sediment accretion and carbon sequestration rates. Carbon sequestration rates (mean ± standard error) for seven sites in the two tidal creeks on the Naples Bay (98 ± 12 g-C m ?2 ·year ?1 ( n = 18)) are lower than published global means for mangrove wetlands, but consistent with other estimates from the same region. Mean carbon sequestration rates in the reference riverine setting were highest (162 ± 5 g-C m ?2 ·year ?1 ), followed by rates in the reference fringe and disturbed riverine settings (127 ± 6 and 125 ± 5 g-C m ?2 ·year ?1 , respectively). The disturbed fringe sequestered 73 ± 10 g-C m ?2 ·year ?1 , while rates within the basin settings were 50 ± 4 g-C m ?2 ·year ?1 and 47 ± 4 g-C m ?2 ·year ?1 for the reference and disturbed creeks, respectively. These data support our hypothesis that mangroves along a hydrologically disturbed tidal creek sequestered less carbon than did mangroves along an adjacent undisturbed reference creek.
机译：这项研究比较了美国西南佛罗里达那不勒斯湾附近两个独立的潮汐红树林小溪的碳固存率。由于上游土地用途的变化，一条潮汐小溪在水文上受到干扰;另一个是不受干扰的参考小河。在两个潮汐小溪中的每一个的盆地，边缘和河流水文地貌环境中收集土壤核心，并分析其堆积密度，总有机碳剖面和沉积物积聚。放射性核素137 Cs和210 Pb用于估算近期的沉积物积聚和碳固存速率。那不勒斯湾两个潮汐小溪中七个地点的碳固存率（均值±标准误）（98±12 gC m？2·年？1（n = 18））低于公布的全球红树林湿地平均值，但与同一地区的其他估算值一致。参考河流地区的平均固碳率最高（162±5 gC m？2·年？1），其次是参考边缘地区和受干扰河流设置的速率（127±6和125±5 gC m？2·年）分别为？1）。受干扰的边缘被隔离为73±10 gC m？2·年？1，而盆地范围内的比率为50±4 gC m？2·年？1和47±4 gC m？2·年？1作为参考和分别扰乱了小河。这些数据支持了我们的假设，即沿水文扰动的潮汐小溪的红树林比邻近的未受干扰的参考小溪的红树林螯合的碳更少。

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