Initial carbonate weathering is linked with vegetation development along a 127-year glacial retreat chronosequence in the subtropical high mountainous Hailuogou region (SW China)
Initial carbonate weathering is linked with vegetation development along a 127-year glacial retreat chronosequence in the subtropical high mountainous Hailuogou region (SW China)
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DOI：
10.1007/s11104-021-05250-y
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发表时间：
2021-12
期刊：
影响因子：
4.9
通讯作者：
Nuria Basdediós;Zhilin Zhong;Yanhong Wu;W. Wilcke
中科院分区：
文献类型：
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作者：
Nuria Basdediós;Zhilin Zhong;Yanhong Wu;W. Wilcke
目的冰川的退缩使新的地形暴露在地球仪周围的初级植物演替中。为了更好地理解冰川退缩年代序列中植被沿着的发展，我们（i）评估了贱金属与（Ca，Mg，K，Na）供应和植被建立，（ii）确定了土壤和植物贱金属库存的建立速率，（iii）估计了主要贱金属通量的大小。结果沿沿着127年的时间序列，生态系统Ca、Mg总储量沿着下降，K、Na总储量与生态系统年龄无关。在最初的47年中，44%的钙和30%的镁分别被浸出，浸出率分别为130 ± 10.6 g m-2 year-1Ca和35 ± 3.1 g m-2 year-1 Mg。有机层积累的平均速率为288 g m-2 year-1，提供了一个生物可利用的基本金属股票，这是特别重要的K cycling.ConclusionsWe建议，最初的高钙生物可利用性，因为在47年的中度碱性土壤pH值和碳酸盐枯竭，连同溶解的易风化的硅酸盐提供足够的镁和钾的先锋植被，促进了CA成熟林的建立。80年了
AimsThe retreat of glaciers is exposing new terrains to primary plant succession around the globe. To improve the understanding of vegetation development along a glacier retreat chronosequence, we (i) evaluated a possible link between base metal (Ca, Mg, K, Na) supply and vegetation establishment, (ii) determined the rates of the establishment of soil and plant base metal stocks, and (iii) estimated the size of the main base metal fluxes.MethodsWe determined base metal stocks in the soil organic layer, the mineral topsoil (0–10 cm), and in leaves/needles, trunk, bark, branches and roots of the dominating shrub and tree species and estimated fluxes of atmospheric deposition, plant uptake and leaching losses along the 127-yr Hailuogou chronosequence.ResultsTotal ecosystem Ca and Mg stocks decreased along the chronosequence, while those of K and Na were unrelated with ecosystem age. Fortyfour and 30% of the initial stocks of Ca and Mg, respectively, were leached during the first 47 years, at rates of 130 ± 10.6 g m−2year−1Ca and 35 ± 3.1 g m−2year−1Mg. The organic layer accumulated at a mean rate of 288 g m−2year−1providing a bioavailable base metal stock, which was especially important for K cycling.ConclusionsWe suggest that the initial high Ca bioavailability because of a moderately alkaline soil pH and carbonate depletion in 47 years, together with the dissolution of easily-weatherable silicates providing enough Mg and K to the pioneer vegetation, contributed to the establishment of the mature forest in ca. 80 years.