Vinicius Costa Cysneiros, Allan Libanio Pelissari, Afonso Figueiredo Filho
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引用次数: 0
摘要
背景了解碳储量变化的驱动因素对于制定有助于减缓气候变化的有效管理策略至关重要。虽然生物多样性与地上碳（AGC）之间的正相关关系在巴西各种森林类型中已被广泛报道，代表了减缓气候变化的双赢局面，但这种关联在巴西亚热带森林中并不常见。因此，在本研究中，我们旨在评估巴西亚热带混交林Araucaria angustifolia、林分结构和物种多样性对AGC储量形成的影响。我们假设，林分结构和多样性对 AGC 的影响将由 A. angustifolia 介导。结果我们发现，林分结构对 AGC 储量的影响最大，其次是 A. angustifolia。我们的假设得到了部分证实，发现A. angustifolia对林分结构的间接影响塑造了AGC。同样，我们的预期也得到了部分支持，保护区内较高的 AGC 与多样性无关，而是与较大的树木、较密集的林分以及较丰富的 A. angustifolia 有关。结论虽然多样性保护与碳储存之间的双赢策略并非 Araucaria 森林的特质，但我们强调了这些森林作为基于自然的气候解决方案的潜力，在提供关键社会经济资源的同时保持高水平的碳储存。
Stand structure and Brazilian pine as key determinants of carbon stock in a subtropical Atlantic forest
Background
Understanding the drivers of variations in carbon stocks is essential for developing the effective management strategies that contribute to mitigating climate change. Although a positive relationship between biodiversity and the aboveground carbon (AGC) has been widely reported for various Brazilian forest types, representing a win–win scenario for climate change mitigation, this association has not been commonly found in Brazilian subtropical forests. Therefore, in the present study, we aimed to evaluate the effects of Araucaria angustifolia, stand structure and species diversity in shaping AGC stocks in Brazilian subtropical mixed forest. We hypothesized that the effects on the AGC of stand structure and diversity would be mediated by A. angustifolia. We also evaluated the expectation of higher carbon stocks in protected forest as a result of their positive correlation with biodiversity conservation.
Results
We found that stand structure, followed by A. angustifolia, played the most important role in shaping the AGC stock. Our hypothesis was partially confirmed, the indirect effects of A. angustifolia on stand structure being found to have shaped the AGC. Similarly, our expectation was partially supported, with the higher AGC in the protected area being related not to diversity, but rather to the presence of larger trees, denser stands, and a greater abundance of A. angustifolia.
Conclusion
Although the win–win strategy between diversity conservation and carbon storage is not a peculiarity of Araucaria forests, we highlight the potential of these forests as a nature-based climate solution, maintaining high levels of carbon storage in harmony with the provision of keystone socio-economic resources.
期刊介绍：
Carbon Balance and Management is an open access, peer-reviewed online journal that encompasses all aspects of research aimed at developing a comprehensive policy relevant to the understanding of the global carbon cycle.
The global carbon cycle involves important couplings between climate, atmospheric CO2 and the terrestrial and oceanic biospheres. The current transformation of the carbon cycle due to changes in climate and atmospheric composition is widely recognized as potentially dangerous for the biosphere and for the well-being of humankind, and therefore monitoring, understanding and predicting the evolution of the carbon cycle in the context of the whole biosphere (both terrestrial and marine) is a challenge to the scientific community.
This demands interdisciplinary research and new approaches for studying geographical and temporal distributions of carbon pools and fluxes, control and feedback mechanisms of the carbon-climate system, points of intervention and windows of opportunity for managing the carbon-climate-human system.
Carbon Balance and Management is a medium for researchers in the field to convey the results of their research across disciplinary boundaries. Through this dissemination of research, the journal aims to support the work of the Intergovernmental Panel for Climate Change (IPCC) and to provide governmental and non-governmental organizations with instantaneous access to continually emerging knowledge, including paradigm shifts and consensual views.
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