This study quantified and assessed patterns in belowground primary productivity (BPP) and belowground biomass in Cladium jamaicense marshes of the oligohaline ecotone, a transition zone between the two dominant ecosystems (freshwater marsh and mangrove forest) in the Everglades. A 2x2x2 factorial design was used with transect (Shark River Slough/Taylor Slough), site (estuarine/freshwater), and season (dry/wet) as factors. BPP and belowground biomass were measured using root ingrowth and soil cores, respectively. Across all sites, BPP was significantly greater in the dry season. BPP peaked in Taylor Slough from April-July, the decrease likely due to oxygen saturation in the soil during marsh dry-down. BPP stayed constant in Shark River Slough, which remained inundated almost year-round. These results indicate that Everglades restoration efforts may negatively impact C. jamaicense marshes. Belowground biomass increased with nutrient availability, though the effects of hydroperiod were unclear. Future research should include root decomposition and mortality as they are crucial to understanding belowground processes in Everglades marshes.
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机译:这项研究量化和评估了低盐生态交错带(占沼泽地两个主要生态系统(淡水沼泽和红树林)之间的过渡带)的日本占卜沼泽地中地下初级生产力(BPP)和地下生物量的模式。使用2x2x2阶乘设计,以横断面(Shark River Slough / Taylor Slough),地点(河口/淡水)和季节(干/湿)为因子。 BPP和地下生物量分别使用根部向内生长和土壤核心进行测量。在干旱地区,所有产地的BPP显着增加。 BPP于4月至7月在泰勒斯劳(Taylor Slough)达到峰值,该下降可能是由于沼泽干dry期间土壤中的氧饱和度所致。 BPP在鲨鱼河泥沼保持不变,几乎全年都被淹没。这些结果表明,大沼泽地的恢复工作可能会对C. jamaicense沼泽产生负面影响。地下生物量随养分利用率的增加而增加,尽管水周期的影响尚不清楚。未来的研究应包括根分解和死亡率,因为它们对于了解大沼泽地沼泽的地下过程至关重要。
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