Righi Ciro Abbud, de Oliveira Risante Ana Paula, Packer Ana Paula, do Couto Hilton Thadeu Zarate
Department of Forestry Science, Escola Superior de Agricultura "Luiz de Queiroz,", University of São Paulo, Av. Pádua Dias, 11, P. O. Box 09, CEP 13418-900, Piracicaba, São Paulo, Brazil.
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Embrapa Meio-Ambiente, Ministério da Agricultura, Pecuária e Abastecimento, Rodovia SP-340 - Km 127.5Tanquinho Velho, P. O. Box 69, CEP 13820-000, Jaguariúna, São Paulo, Brazil.
Environ Monit Assess. 2023 Mar 21;195(4):492. doi: 10.1007/s10661-023-11051-w.
Deforestation accounts for the majority of greenhouse gas emissions in developing countries. In Brazil, deforestation represents ~ 70% of the nation's greenhouse gas emissions. Among the main deforested vegetation, Cerrado (Brazilian savanna) occupies a prominent position as it is the second biggest biome in Brazil. Despite its importance, there are still few estimates of above and belowground biomass of Cerrado vegetation encompassing its structural and spatial complexity. Also, Cerrado holds a specific biodiversity that is normally undervalued and which is being lost in the fires of agricultural fronts. In this context, this study aimed to verify the relationship of the existing flora biodiversity in a cerrado stricto sensu with its aboveground biomass and carbon stocks. The possibility of a relationship between fine root mass and soil organic carbon content was also verified. The study area presented a total of 67 species and 798 trees (average: 1596 trees ha). The mean total aboveground biomass and carbon stocks were 77.08 Mg ha and 38.54 Mg ha respectively. Soil organic carbon stock (0-30 cm) was 8.51 Mg ha whereas fine roots were 1.637 Mg ha. Total aboveground biomass presented a highly significant asymptotic relationship with biodiversity demonstrating its importance in reaching high biomass accumulation. A significant relationship between soil organic carbon content and fine root biomass was found making easier belowground biomass estimates.
森林砍伐是发展中国家温室气体排放的主要来源。在巴西，森林砍伐占该国温室气体排放的约70%。在主要的砍伐植被中，塞拉多（巴西热带稀树草原）占据突出地位，因为它是巴西第二大生物群落。尽管其很重要，但对于涵盖其结构和空间复杂性的塞拉多植被地上和地下生物量的估计仍然很少。此外，塞拉多拥有独特的生物多样性，这种生物多样性通常被低估，并且正在农业前沿的火灾中丧失。在此背景下，本研究旨在验证严格意义上的塞拉多地区现有植物生物多样性与其地上生物量和碳储量之间的关系。还验证了细根质量与土壤有机碳含量之间存在关系的可能性。研究区域共有67个物种和798棵树（平均：每公顷1596棵树）。地上生物量和碳储量的平均值分别为77.08 Mg/公顷和38.54 Mg/公顷。土壤有机碳储量（0 - 30厘米）为8.51 Mg/公顷，而细根为1.637 Mg/公顷。地上生物总量与生物多样性呈现出高度显著的渐近关系，表明其在实现高生物量积累方面的重要性。发现土壤有机碳含量与细根生物量之间存在显著关系，这使得地下生物量的估计更加容易。
