...
首页> 外文期刊>Acta oecologica >Unravelling ecosystem functions at the Amazonia-Cerrado transition: II. Carbon stocks and CO2 soil efflux in cerrad?o forest undergoing ecological succession
【24h】

Unravelling ecosystem functions at the Amazonia-Cerrado transition: II. Carbon stocks and CO2 soil efflux in cerrad?o forest undergoing ecological succession

机译:在Amazonia-Cerrado转换中解开生态系统功能:II。 碳股和co 2 cerrad的土壤流出?o 森林经历生态继承

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

Abstract The transition region between two major South American biomes, the Amazon forest and the Cerrado (Brazilian savanna), has been substantially converted into human-modified ecosystems. Nevertheless, the recovery dynamics of ecosystem functions in this important zone of (ecological) tension (ZOT) remain poorly understood. In this study, we compared two areas of cerrad?o (a forest-woodland of the Brazilian savanna; Portuguese augmentative of cerrado), one in secondary succession (SC) and one adjacent and well preserved (PC), to test whether the ecosystem functions lost after conversion to pasture were restored after 22 years of regeneration. We tested the hypothesis that the increase in annual aboveground biomass in the SC would be greater than that in the PC because of anticipated successional gains. We also investigated soil CO2 efflux, litter layer content, and fine root biomass in both the SC and PC. In terms of biomass recovery our hypothesis was not supported: the biomass did not increase in the successional area over the study period, which suggested limited capacity for recovery in this key ecosystem compartment. By contrast, the structure and function of the litter layer and root mat were largely reconstituted in the secondary vegetation. Overall, we provide evidence that 22 years of secondary succession were not sufficient for these short and open forests (e.g., cerrad?o) in the ZOT to recover ecosystem functions to the levels observed in preserved vegetation of identical physiognomy.
机译:<![CDATA [ 抽象 两个主要南美洲生物群岛,亚马逊森林和塞拉多岛(巴西大草原)之间的过渡区域基本上转化为人改性的生态系统。然而,在这个重要区域(生态)张力(ZOT)中的生态系统功能的恢复动态仍然明确。在这项研究中,我们比较了斜体的两个区域?在二次继承(SC)和一个相邻且保存的(PC)中,以测试在22年再生后转换为牧场后的生态系统功能是否恢复。我们测试了假设,即SC中年地上生物量的增加将大于PC中的,因为预期的连续收益。我们还调查了土壤CO 2 流出,垃圾层含量和SC和PC中的细根生物量。就生物质回收而言,我们不支持我们的假设:在研究期间,生物量没有增加,这提出了该关键生态系统舱内的恢复能力有限。相比之下,垃圾层和根垫的结构和功能在大型植被中基本上重构。总体而言,我们提供了表明,这些短期和开放的森林(例如, cerrad?o )中的22年的二次继承不足以恢复在观察到的水平的生态系统函数保存相同的地貌植被。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号