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首页> 外文期刊>Open Journal of Ecology >Effects of micro-environmental conditions and forest disturbance on the establishment of two Andean palms in Ecuador
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Effects of micro-environmental conditions and forest disturbance on the establishment of two Andean palms in Ecuador

机译：微环境条件和森林干扰对厄瓜多尔两只安第斯棕榈的建立的影响

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摘要

The wax palm (Ceroxylon echinulatum) and palm heart (Prestoea acuminata) are key elements in Andean natural forests. This ecosystem is threatened by deforestation and habitat degradation, thus, it is vital to explore the impact of anthropogenic activities on the ecological structure and preferences of these species in order to develop proper conservation strategies. Fifty-seven 400 m2 plots were established in two forest areas, a disturbed forest (n = 30 plots) and an undisturbed forest (n = 27 plots) in the Ecuadorean Andes. Nine micro-environmental variables and the number of individuals of C. echinulatum and P. acuminata in five size classes were recorded in each plot. Logistic regression models helped identify environmental variables that influence the establishment of the species. Results showed that different micro-environmental variables determined the presence of different size classes. Both species were benefitted by the environmental conditions of the disturbed forest. Light availability was important for the establishment of both species, especially for the canopy species (C. echinulatum). This palm was negatively affected by the variable “fallen wood”, while P. acuminata was negatively affected mainly by the steepness of the terrain. The environmental variables for the successful establishment of the studied species that were identified by this study provide clues for the sustainable management of C. echinulatum and P. acuminata in Andean forests.
机译：蜡棕榈（Ceroxylon echinulatum）和棕榈心（Prestoea acuminata）是安第斯天然森林中的关键元素。这个生态系统受到森林砍伐和栖息地退化的威胁，因此，至关重要的是探索人为活动对这些物种的生态结构和偏好的影响，以便制定适当的保护战略。在两个森林地区建立了47个400平方米的土地，其中厄瓜多尔安第斯山脉的一块受干扰的森林（n = 30块）和一块未受干扰的森林（n = 27块）。在每个样地中，记录了五个大小等级中的九个微环境变量和棘孢梭菌和尖锐假单胞菌的个体数量。逻辑回归模型有助于确定影响物种建立的环境变量。结果表明，不同的微环境变量决定了不同尺寸类别的存在。这两种物种都受益于受干扰森林的环境条件。光的可用性对于两个物种的建立都很重要，特别是对于冠层物种（C. echinulatum）而言。该棕榈树受到变量“倒下的木材”的负面影响，而P. acuminata主要受到地形陡峭的负面影响。本研究确定了成功建立所研究物种的环境变量，为安第斯森林中的棘皮锦梭菌和积雪草的可持续管理提供了线索。

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