Ureta Adrianzén Marisabel
Rev Biol Trop. 2015 Mar;63(1):263-73.
Amazonian forests are a vast storehouse of biodiversity and function as carbon sinks from biomass that accumulates in various tree species. In these forests, the taxa with the greatest contribution of biomass cannot be precisely defined, and the representative distribution of Myristicaceae in the Peruvian Amazon was the starting point for designing the present study, which aimed to quantify the biomass contribution of this family. For this, I analyzed the databases that corresponded to 38 sample units that were previously collected and that were provided by the TeamNetwork and RAINFOR organizations. The analysis consisted in the estimation of biomass using pre-established allometric equations, Kruskal-Wallis sample comparisons, interpolation-analysis maps, and nonparametric multidimensional scaling (NMDS). The results showed that Myristicaceae is the fourth most important biomass contributor with 376.97 Mg/ha (9.92 Mg/ha in average), mainly due to its abundance. Additionally, the family shows a noticeable habitat preference for certain soil conditions in the physiographic units, such is the case of Virola pavonis in "varillales", within "floodplain", or Iryanthera tessmannii and Virola loretensis in sewage flooded areas or "igapo" specifically, and the preference of Virola elongata and irola surinamensis for white water flooded areas or "varzea" edaphic conditions of the physiographic units taken in the study.
亚马逊森林是生物多样性的巨大宝库，并且作为碳汇，储存着积累在各种树种中的生物量。在这些森林中，生物量贡献最大的分类群无法精确界定，而肉豆蔻科在秘鲁亚马逊地区的代表性分布是本研究设计的起点，该研究旨在量化这个科的生物量贡献。为此，我分析了与先前收集的38个样本单元相对应的数据库，这些数据库由TeamNetwork和RAINFOR组织提供。分析包括使用预先建立的异速生长方程估计生物量、进行Kruskal-Wallis样本比较、绘制插值分析图以及进行非参数多维标度分析（NMDS）。结果表明，肉豆蔻科是第四大重要的生物量贡献者，生物量为376.97 Mg/公顷（平均9.92 Mg/公顷），主要是由于其丰富度。此外，该科在地貌单元中对某些土壤条件表现出明显的栖息地偏好，例如“泛滥平原”内“varillales”中的帕氏油桃木，或者特别是在污水泛滥地区或“igapo”中的特斯曼油桃木和洛雷油桃木，以及在研究中所涉及的地貌单元的白水泛滥地区或“várzea”土壤条件下，长叶油桃木和苏里南油桃木的偏好。
