Enrichment planting to restore degraded tropical forest fragments in Brazil
Enrichment planting to restore degraded tropical forest fragments in Brazil
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巴西开展富集种植以恢复退化的热带森林碎片
作者：
J. R. Mangueira;Karen D. Holl;R. Rodrigues
摘要在热带地区，由于农业利用，森林碎片化程度较高，在景观尺度上，森林碎片对生物多样性保护起着重要作用。但是这些片段受到反复的干扰，这导致了功能群的停止继承和丧失。在这种情况下，积极的恢复，如富集种植，可以促进恢复。我们研究了丰富的种植方法，以恢复热带森林片段在巴西大西洋森林，我们评估了成本，实施它们在外地。我们种植了四个后来的演替树种的种子，小树苗，大树苗在三个残余嵌入在甘蔗种植园为主的景观。总体而言，由于研究期间发生严重干旱，使用所有方法的幼苗存活率都很低，并且三个研究地点的幼苗存活或生长没有差异。直播是最便宜的技术，但只有一个大种子的物种，Hymenaea courbaril成功。大苗比小幼苗存活得更好，所有四个物种，这表明种植大苗的额外成本是必要的，以提高成功。我们的研究结果强调，在物种水平上的种植方法的组合可能会增加恢复成功。编辑：John Parrotta
ABSTRACT In tropical areas with high levels of fragmentation due to agricultural use, forest fragments play an important role for biodiversity conservation at the landscape scale. But these fragments are subject to recurrent disturbances, which lead to arrested succession and loss of functional groups. In such cases, active restoration, such as enrichment planting, could facilitate recovery. We studied enrichment planting methods to restore tropical forest fragments in the Brazilian Atlantic Forest, and we evaluated the costs to implement them in the field. We planted four later successional tree species as seeds, small seedlings, and large seedlings in three remnants embedded in a landscape dominated by sugarcane plantations. Overall, survival of seedlings was low using all methods due to a severe drought during the study period, and there were no differences in seedling survival or growth across the three study sites. Direct seeding was the least expensive technique but was successful only for one large-seeded species, Hymenaea courbaril. Large seedlings survived better than did small seedlings, for all four species, suggesting that the additional cost of growing large seedlings is warranted to enhance success. Our results highlight that a combination of planting methods at species level is likely to increase restoration success. EDITED BY John Parrotta