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Post-agricultural succession in El Peten, Guatemala

机译：危地马拉埃尔佩滕的农业后继承

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We compared post-agricultural succession across the range of farming activities practiced in Guatemala's northern lowlands: agroforestry, swidden, ranching, and input-intensive monocultures. At 10 sites over 13 to 40 months we assessed the following characteristics of trees and shrubs that were >1 cm diameter at breast height: height, basal-area accumulation, recruitment of all individuals and fleshy-fruited individuals, and accumulation of all species and fleshy-fruited species. Succession, as measured by all these response variables except height, was dramatically faster on agroforestry and swidden sites than on pastures or input-intensive monocultures. Overall recruitment was faster for swiddens than for agroforests, but other response variables did not differ significantly between the two treatments. Regression results suggest that initial ground cover by herbs inhibited recruitment of woody colonists. The significant positive coefficient for initial basal area and the significant negative coefficient for distance from forest for accumulation of both fleshy-fruited individuals and species are probably explained by the behavioral responses of seed-dispersing animals. Our results suggest that the conservation strategy of discouraging swidden agriculture in favor of sedentary, input-intensive agriculture to relieve pressure on old-growth forest may be counterproductive over the long term. [References: 68]
机译：我们比较了危地马拉北部低地开展的一系列农业活动中的农业后演替：农林业，耕种，牧场和投入密集的单一文化。在13到40个月的10个地点中，我们评估了以下树木和灌木的以下特征：它们在乳房高度处的直径大于1厘米：身高，基底面积累积，所有个体和果肉个体的募集以及所有物种和物种的积累肉质果种。用高度响应的所有这些响应变量来衡量，农用林和湿地上的演替要比牧场或投入密集型单一栽培的演习快得多。相对于农用林，混养林的总体募集速度更快，但两种处理之间的其他响应变量没有显着差异。回归结果表明，草药最初覆盖地面会抑制木质殖民者的招募。散果动物的行为反应可能解释了初始基础面积的显着正系数和离果距离的肉质果实个体和物种积累的显着负系数。我们的研究结果表明，从长远来看，不鼓励水耕农业的养护策略，而转向久坐的投入密集型农业以减轻对老龄林的压力，可能会适得其反。 [参考：68]

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