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Multiple‐trophic patterns of primary succession following retreat of a high‐elevation glacier
Ecosphere ( IF 2.7 ) Pub Date : 2021-03-24 , DOI: 10.1002/ecs2.3400
Weiming Hu 1 , Steven K. Schmidt 2 , Pacifica Sommers 2 , John L. Darcy 3 , Dorota L. Porazinska 1, 2
Affiliation  

How multiple, interacting components of complex soil communities assemble within forefields of receding glaciers is still largely unknown, especially at high‐elevation sites (>5000 m a.s.l.) where plant succession is very slow. To examine succession of soil communities across different trophic levels, we investigated four major soil groups: bacteria, fungi, nematodes, and other non‐fungal non‐nematode microbial eukaryotes at the Puca Glacier in the Peruvian Andes spanning 9‐, 24‐, and 89‐year‐old deglaciated soils. This is the first study of microbial communities, other than bacteria, at a high‐elevation chronosequence in the Andes Mountains. In addition, we characterized soil biogeochemical properties (e.g., C, N, moisture, and pH) and rates of microbial enzyme activities associated with C, N, and P acquisition. We found significantly correlated increases in estimated richness and high species turnover in all soil groups along the chronosequence. These shifts in soil communities were significantly correlated with microbial enzyme activities and measures of C, N, moisture, and pH. Stoichiometric comparisons of enzyme activities showed phosphorus (P) and carbon (C) limitation of microbial activity across the entire chronosequence with no hint of nitrogen (N) limitation. Taken together, the observed shifts in soil communities and biogeochemistry indicate coordinated increases in trophic complexity and ecosystem functioning during the initial 90 yr of microbial succession along the post‐glacial chronosequence of the Puca Glacier.

中文翻译:

高海拔冰川退缩后的一次演替的多营养型

在后退的冰川前场中,复杂土壤群落的多种相互作用成分如何聚集仍然是未知的,尤其是在植物演替非常缓慢的高海拔地区(> 5000 m asl)。为了研究不同营养水平下土壤群落的演替,我们调查了秘鲁安第斯山脉普卡冰川的9、24和9个土壤中的四个主要土壤类别:细菌,真菌,线虫和其他非真菌非线虫微生物真核生物。 89岁的土壤为冰状。这是对安第斯山脉高海拔时间序列上除细菌以外的微生物群落的首次研究。此外,我们表征了土壤生物地球化学特性(例如,C,N,水分和pH)以及与C,N和P采集相关的微生物酶活性的比率。我们发现,沿着时间序列,所有土壤组的估计丰富度和高物种更新率的显着相关增加。土壤群落的这些变化与微生物酶活性以及碳,氮,水分和pH的测量值显着相关。酶活性的化学计量比比较显示,在整个时间序列上,微生物活动的磷(P)和碳(C)受限,而没有氮(N)受限的迹象。两者合计,观察到的土壤群落和生物地球化学的变化表明,在微生物继承的最初90年中,沿Puca冰川的冰川后时序,营养复杂性和生态系统功能的协调增加。土壤群落的这些变化与微生物酶活性以及碳,氮,水分和pH的测量值显着相关。酶活性的化学计量比比较显示,在整个时间序列上,微生物活动的磷(P)和碳(C)受限,而没有氮(N)受限的迹象。两者合计,观察到的土壤群落和生物地球化学的变化表明,在微生物继承的最初90年中,沿Puca冰川的冰川后时序,营养复杂性和生态系统功能的协调增加。土壤群落的这些变化与微生物酶活性以及碳,氮,水分和pH的测量值显着相关。酶活性的化学计量比比较显示,在整个时间序列上,微生物活动的磷(P)和碳(C)受限,而没有氮(N)受限的迹象。两者合计,观察到的土壤群落和生物地球化学的变化表明,在微生物继承的最初90年中,沿Puca冰川的冰川后时序,营养复杂性和生态系统功能的协调增加。酶活性的化学计量比比较显示,在整个时间序列上,微生物活动的磷(P)和碳(C)受限,而没有氮(N)受限的迹象。两者合计,观察到的土壤群落和生物地球化学的变化表明,在微生物继承的最初90年中,沿Puca冰川的冰川后时序,营养复杂性和生态系统功能的协调增加。酶活性的化学计量比比较显示,在整个时间序列上,微生物活动的磷(P)和碳(C)受限,而没有氮(N)受限的迹象。两者合计,观察到的土壤群落和生物地球化学的变化表明,在微生物继承的最初90年中,沿Puca冰川的冰川后时序,营养复杂性和生态系统功能的协调增加。
更新日期:2021-03-25
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