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Root biomass and productivity in subtropical arid mangroves from the Gulf of California
Rhizosphere ( IF 3.7 ) Pub Date : 2021-04-16 , DOI: 10.1016/j.rhisph.2021.100356
Jony R. Torres , Zulia M. Sanchez-Mejia , José A. Arreola-Lizárraga , Enrico A. Yépez , Felipe Reynaga-Franco , Francisco J. Choix

Root biomass and productivity research provide valuable information for understanding the ecological processes that occur within mangroves. The data reported by different studies on belowground biomass suggest a high spatial variability, which local factors can control. In this study, the productivity and biomass of belowground roots and pneumatophores of arid mangroves were measured along with sediment and water physical-chemical characteristics in three mangrove zones of the arid region of the Gulf of California, Mexico. Core extraction was performed to measure belowground biomass; in addition, the root productivity was determined using the in-growth core technique, and pneumatophores were sampled at the soil level. Sediment samples were collected monthly to determine texture, pH, bulk density, moisture content, and organic matter. The flood pattern was estimated using piezometers. The study ran from June 2018 to May 2019. An average root productivity was 213.7 g m−2•year−1, with belowground biomass (74.05 ± 15.2 ton•ha−1) and pneumatophores of 5.69 ± 0.92 ton•ha−1. We conclude that the amount of root biomass in arid regions is inverse to the scrub-type mangrove's structural development, which stores up to 70% more than the mangroves in tropical regions. Thus mangroves in arid regions play a role in belowground carbon storage, which depends on multiple variables simultaneously (i.e.: salinity, flood pattern, soil depth, interstitial ORP).



中文翻译:

加利福尼亚湾亚热带干旱红树林的根系生物量和生产力

根生物量和生产力研究为了解红树林内部发生的生态过程提供了宝贵的信息。关于地下生物量的不同研究报告的数据表明,空间变异性很高,可以由局部因素控制。在这项研究中,测量了干旱红树林的地下根和气生植物的生产力和生物量,以及墨西哥湾干旱地区的三个红树林区的沉积物和水的物理化学特征。进行岩心提取以测量地下生物量;此外,根部生产力是通过生长中核心技术确定的,并在土壤水平上采样了肺气菌。每月收集沉积物样品以确定质地,pH,堆积密度,水分含量和有机物。洪水模式是使用测压计估算的。该研究于2018年6月至2019年5月进行。平均根系生产力为213.7 g m−2 •year -1,具有地下生物量(74.05±15.2 ton•ha -1),气电筒为5.69±0.92 ton•ha -1。我们得出的结论是,干旱地区根生物量的数量与灌丛型红树林的结构发育成反比,后者比热带地区的红树林多储存70%。因此,干旱地区的红树林在地下碳储量中发挥作用,地下碳储量同时取决于多个变量(即盐度,洪水模式,土壤深度,间隙ORP)。

更新日期:2021-04-16
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