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首页> 外文期刊>International Journal of Forestry Research >Relationships between Plant Biodiversity and Soil Fertility in a Mature Tropical Forest, Costa Rica
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Relationships between Plant Biodiversity and Soil Fertility in a Mature Tropical Forest, Costa Rica

机译：哥斯达黎加成熟热带森林植物生物多样性与土壤肥力的关系

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摘要

We aimed to study relationships between plant biodiversity and soil chemical fertility in a mature tropical forest of Costa Rica. Soil samples were collected in nine sampling plots (5 m by 25 m) in order to identify P, K, Ca, Mg, Fe, Zn, Mn, Cu, and Al and total N contents, soil fertility index, CEC, pH, and C/N ratio. Furthermore, species richness, Shannon-Wiener and Simpson’s species diversities, structural richness, and structural diversity were calculated for each plot. Simple linear regression analyses were conducted. Tree species richness was inversely related to concentration levels of K, Ca, and P, CEC, and soil fertility index. Therefore, higher tree species richness tended to be found on sites with lower soil fertility, which is the complete opposite of temperate forests. As a result, tropical and temperate forest ecology should be considered separately. Shannon-Wiener tree species diversity was positively correlated to C/N ratio. Herb structural richness was positively correlated with soil fertility index and P concentration. Therefore, herb structural richness may be a good indicator of soil fertility. This study gives important insights on ecological relationships between plant biodiversity and soil chemical fertility in a primary tropical forest.
机译：我们旨在研究哥斯达黎加成熟热带森林中植物生物多样性与土壤化学肥力之间的关系。在9个采样区（5μmx25μm）中采集土壤样品，以鉴定P，K，Ca，Mg，Fe，Zn，Mn，Cu和Al以及总氮含量，土壤肥力指数，CEC，pH，和C / N比。此外，还为每个样地计算了物种丰富度，Shannon-Wiener和Simpson的物种多样性，结构丰富度和结构多样性。进行了简单的线性回归分析。树种丰富度与钾，钙和磷的浓度水平，CEC和土壤肥力指数成反比。因此，倾向于在土壤肥力较低的地方发现较高的树种丰富度，这与温带森林完全相反。因此，应分别考虑热带和温带森林的生态。香农-维纳树种多样性与碳氮比呈正相关。草本结构丰富度与土壤肥力指数和磷含量呈正相关。因此，草本植物的丰富性可能是土壤肥力的良好指标。这项研究对原始热带森林中植物生物多样性与土壤化学肥力之间的生态关系提供了重要见解。

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