Factors influencing early secondary succession and ecosystem carbon stocks in Brazilian Atlantic Forest
Factors influencing early secondary succession and ecosystem carbon stocks in Brazilian Atlantic Forest
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影响巴西大西洋森林早期次生演替和生态系统碳储量的因素
DOI：
10.1007/s10531-015-0982-9
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发表时间：
2015
影响因子：
3.4
通讯作者：
Robinson S
中科院分区：
文献类型：
--
作者：
Robinson S
在废弃土地上恢复生态相关的大西洋次生林，为恢复生物多样性和改善关键的生态系统服务，包括碳固存，提供了一种潜在的手段。早期次生演替轨迹由影响植物群落发展的一系列环境因素决定。未来的恢复战略需要对森林植被群落、其动态和潜在驱动因素有具体情况的了解。在这项研究中，我们研究了土壤(化学和物理)和环境(景观和地形)特征，植物群落属性，以及在早期次生演替过程中碳储量之间的关系。数据是在季节性干燥的大西洋森林(巴西里约热内卢州)进行早期次生演替的两个地点收集的。这两个地点以前被用作牧场，在相似的时间被遗弃，但显示出不同的植被群落。我们发现，乔木生物量、多样性和生态系统碳储量与周围森林、坡度较小和粘性土壤的数量呈强烈的正相关，与灌木的丰富度呈负相关。土壤碳库随地上部分生物量的增加而显著增加。对总体演替发展的衡量标准(结合树木生物量和多样性)有显著影响的唯一因素是周围的总森林复盖率。我们的研究结果表明，次生林和地上、地下碳储量的恢复受到邻近森林的数量、某些土壤性质和茂密的灌木设施的限制，从而下调了演替过程。总体而言，我们通过与生态相关的播种/种植方案和可能有利于生态系统碳储存的选择性灌木清除，提供了改善大西洋森林恢复的潜力的证据。
Ecologically relevant restoration of secondary Atlantic forest on abandoned land offers a potential means to recover biodiversity and improve crucial ecosystem services, including carbon sequestration. Early secondary successional trajectories are determined by a range of environmental factors that influence plant community development. Context-specific understanding of forest vegetation communities, their dynamics, and underlying drivers is needed for future restoration strategies. In this study we examined relationships between soil (chemical and physical) and environmental (landscape and topographical) characteristics, plant community attributes, and carbon stocks during early secondary succession. Data were collected at two sites undergoing early secondary succession in seasonally-dry Atlantic Forest (Rio de Janeiro State, Brazil). Both sites were previously used for pasture and abandoned at similar times, but showed differing vegetation communities. We found tree biomass and diversity and ecosystem carbon storage to be strongly positively related to the amount of surrounding forest, less steep slopes and clay soils, and negatively to the abundance of the shrubLeandra aurea. Soil carbon pools significantly increased with aboveground tree biomass. The only factor significantly affecting the metric of overall successional development (combining tree biomass and diversity) was total surrounding forest cover. Our findings suggest recovery of secondary forest and below- and aboveground carbon storage is limited by the amount of adjacent forest, some soil properties and dense shrub establishment down-regulating the succession process. Overall we offer evidence of potential to improve recovery of Atlantic forest with ecologically relevant seeding/planting programmes and selective shrub removal that could benefit ecosystem carbon storage.
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