Does Shift in Vegetation Abundance After Nitrogen and Phosphorus Additions Play a Key Role in Regulating Fungal Community Structure in a Northern Peatland?
Does Shift in Vegetation Abundance After Nitrogen and Phosphorus Additions Play a Key Role in Regulating Fungal Community Structure in a Northern Peatland?
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DOI：
10.3389/fmicb.2022.920382
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发表时间：
2022
影响因子：
5.2
通讯作者：
中科院分区：
文献类型：
--
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土壤真菌群落是泥炭地生物地球化学过程的关键参与者，泥炭地是全球重要的碳储量。虽然真菌易受环境变化的影响，但长期氮磷富集对北方泥炭地真菌群落结构的复杂交互作用尚不清楚。在这项研究中，我们比较了中国东北泥炭地复合体的短期（2年）和长期（10年）施肥试验，以评估N和/或P添加对真菌群落结构的影响。结果表明：N的添加改变了真菌群落组成和多样性，与P的添加无显著交互作用。长期和短期的营养添加都能改变不同植物功能类型的丰度。然而，在所有施肥试验中，对真菌群落没有明显的级联效应。长期营养添加对不同真菌功能群落的相对丰度影响较大；腐生菌相对丰度的增加对菌根真菌没有危害。此外，长期施氮后，sphagnicola盖度的下降与sphagnicola相关真菌（Clavaria sphagnicola、Galerina tibiicystis、G. sphagnicola和G. paludosa）相对丰度的变化并不平行。鉴于短期和长期施肥对真菌群落结构的影响差异很大，本研究强调了评估养分富集对泥炭地生态系统植被和真菌群落关系的长期影响的必要性。未来的研究重点应强调真菌功能行会的群落结构与其功能之间的联系，这对于更好地了解它们在不确定氮、磷沉积制度下对碳储量的影响至关重要。
Soil fungal communities are key players in biogeochemical processes of peatlands, which are important carbon stocks globally. Although it has been elucidated that fungi are susceptible to environmental changes, little is known about the intricate and interactive effect of long-term nitrogen (N) and phosphorus (P) enrichment on fungal community structure in northern peatlands. In this study, we compared a short- (2 years) with a long-term (10 years) fertilization experiment in a peatland complex in northeastern China to assess how N and/or P additions influence fungal community structure. The results showed that fungal community composition and diversity were altered by N addition, without a significant interactive effect with P addition. Not only the long-term but also the short-term nutrient addition could change the abundance of different plant functional types. However, there were no strong cascading effects on the fungal community in any of the fertilization experiments. Long-term nutrient addition showed a stronger effect on the relative abundance of different fungal functional guilds; an increase in the relative abundance of saprotrophs after fertilization did not jeopardize mycorrhizal fungi. Moreover, the decline in Sphagnum cover after long-term N addition did not parallel changes in the relative abundance of Sphagnum-associated fungi (Clavaria sphagnicola, Galerina tibiicystis, G. sphagnicola, and G. paludosa). Given that short- and long-term fertilization showed strongly contrasting effects on fungal community structure, our study highlights the necessity of assessing the long-term effects of nutrient enrichment on the association between vegetation and fungal community in peatland ecosystems. Future research priorities should emphasize the connection between the community structure of fungal functional guilds and their functionality, which is of paramount importance to better understand their influences on C storage in the face of uncertain N and P deposition regimes.
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影响因子：
11.6
作者：
Carrara JE;Walter CA;Hawkins JS;Peterjohn WT;Averill C;Brzostek ER
通讯作者：
Brzostek ER
影响因子：
4.8
作者：
Clark, JS
通讯作者：
Clark, JS
影响因子：
5.5
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影响因子：
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通讯作者：
Crossley, A.
影响因子：
3.7
作者：
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通讯作者：
Wilson RM