Changes in Carbon Storage of Masson Pine Forests along a Latitudinal Gradient with Different Stand Structures in Southern China

IF 0.4 4区 环境科学与生态学 Q4 ECOLOGY Polish Journal of Ecology Pub Date : 2022-05-30 DOI:10.3161/15052249PJE2021.69.3.001
Qiang Wu, Hengyun Ma, Yuanying Peng, Wende Yan, Deng Pan
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Abstract

ABSTRACT The spatial patterns of carbon pool in landscape vary greatly with variation of forest structures and climate conditions. In this field study, the carbon storage in overstory, understory, litter layer of plants and soil carbon in forests was investigated in 26-28 year-old Masson pine (Pinus massoniana) pure and mixed forests along a latitudinal gradient (20–30 °N) crossing Hunan and Guangxi provinces of China, during the period of May 2015–August 2017. We found that the total carbon storage in Masson pine forests ranged 88.92–149.41 Mg/ha, of which 54.03% occurred in aboveground compound and 45.97% occurred belowground. The overall total carbon storage distribution was 34.62–68.72 Mg/ha, 3.82–10.19 Mg/ha, 2.37–3.96 Mg/ha, and 6.06–12.08 Mg/ha in stems, branches, leaves, and roots, respectively. The carbon storage in the overstory of forest stands and forest soils significantly decreased with increasing latitude, while the carbon storage in the understory and litter of the forest stands significantly increased as the latitude increased. The overall carbon storage significantly decreases by 8.26 Mg/ha in Masson pine forests as the latitude increased by one degree. The carbon storage increased by 8.43% in Masson pine mixed forests compared to the pure forest stands after the transformation from the pure forest stands into the mixed forest stands ∼ 15 years later. The results of changes in carbon storage in the studied forests with the latitudinal gradient could be attributed to variations in hydrothermal conditions with changing latitudes. The forest structure with different tree species composition was another important factor regulating carbon storage in forest ecosystems at the same latitude. The results provided a scientific basis for better understanding of latitudinal variation and spatial distribution of carbon storage in Masson pine forest stands with optimal forest stand structures in subtropical region of China.
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中国南方不同林分结构马尾松森林碳储量随纬度梯度的变化
随着森林结构和气候条件的变化,景观碳库的空间格局变化很大。本研究于2015年5月- 2017年8月在横贯湘桂两省的26-28年生马尾松(Pinus massoniana)纯混交林中,沿纬度梯度(20-30°N)调查了林下、林下、凋落物层的碳储量和土壤碳。结果表明,马尾松林总碳储量为88.92 ~ 149.41 Mg/ha,其中地上复合碳储量占54.03%,地下复合碳储量占45.97%。茎、枝、叶和根的总碳储量分布分别为34.62 ~ 68.72 Mg/ha、3.82 ~ 10.19 Mg/ha、2.37 ~ 3.96 Mg/ha和6.06 ~ 12.08 Mg/ha。随着纬度的增加,林分林下和森林土壤的碳储量显著减少,林分林下和凋落物的碳储量显著增加。纬度每增加1度,马尾松林总碳储量显著减少8.26 Mg/ha。马尾松混交林在由纯林分转变为混交林约15年后,碳储量比纯林分增加8.43%。研究森林碳储量随纬度梯度变化的结果可归因于热液条件随纬度变化的变化。不同树种组成的森林结构是调节同纬度森林生态系统碳储量的另一个重要因素。研究结果为进一步了解中国亚热带最优林分结构马尾松林分碳储量的纬向变化和空间分布提供了科学依据。
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来源期刊
Polish Journal of Ecology
Polish Journal of Ecology 环境科学-生态学
CiteScore
1.10
自引率
0.00%
发文量
9
审稿时长
18-36 weeks
期刊介绍: POLISH JOURNAL OF ECOLOGY (formerly Ekologia polska) publishes original scientific research papers dealing with all aspects of ecology: both fundamental and applied, physiological ecology, evolutionary ecology, ecology of population, community, ecosystem, landscape as well as global ecology. There is no bias regarding taxons, ecosystems or geographical regions.
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