Elevated CO2 enhances decomposition and modifies litter-associated fungal assemblages in a natural Eucalyptus woodland

IF 4.6 1区 环境科学与生态学 Q1 ECOLOGY Functional Ecology Pub Date : 2024-06-05 DOI:10.1111/1365-2435.14598
Uffe N. Nielsen, Dylan Bristol, Michaela Blyton, Brendan Delroy, Jeff R. Powell
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升高的二氧化碳促进了自然桉树林的分解并改变了与垃圾相关的真菌群落
废弃物分解是森林生态系统中碳和养分循环的一个关键过程,预计会受到大气中二氧化碳(CO2)浓度增加的影响。我们进行了两项互补的实地研究,以评估二氧化碳升高对桉树废弃物分解过程的影响。首先,我们使用两种不同网眼大小的袋子,评估大型动物和高浓度 CO2 在 24 个月内对环境 CO2 条件下生长的枯落物质量损失的影响。然后,我们评估了高浓度 CO2 在以下每种组合下生长的枯落物分解过程中的影响:(i)环境 CO2 或高浓度 CO2;(ii)牛皮蝇爆发导致树冠严重脱落期间;或在牛皮蝇密度较低的树冠发育后期。同样,在第二项研究中,高浓度 CO2 会增加腐烂后期的质量损失,尤其是在高浓度 CO2 条件下生长的未受虫害影响的枯落物。在这两项研究中,腐烂过程中的二氧化碳浓度都会影响真菌群落,而且在观察到对腐烂的任何影响之前,就已经观察到了这些影响,在二氧化碳浓度升高的情况下,一些与嗜渍真菌有关的真菌被发现的频率更高。叶片在何种二氧化碳浓度下生长以及叶片是否受到木虱的影响也是影响真菌群落的重要因素。高浓度 CO2 对晚期腐烂阶段的质量损失有积极影响,这与之前的研究结果相反,之前的研究结果表明高浓度 CO2 通常会降低腐烂率。我们的研究结果表明,高浓度 CO2 对腐烂率的影响是因地制宜的。我们需要进一步研究,以确定发生这种情况的机制,从而更好地模拟 CO2 升高对全球碳动态的影响。
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来源期刊
Functional Ecology
Functional Ecology 环境科学-生态学
CiteScore
9.00
自引率
1.90%
发文量
243
审稿时长
4 months
期刊介绍: Functional Ecology publishes high-impact papers that enable a mechanistic understanding of ecological pattern and process from the organismic to the ecosystem scale. Because of the multifaceted nature of this challenge, papers can be based on a wide range of approaches. Thus, manuscripts may vary from physiological, genetics, life-history, and behavioural perspectives for organismal studies to community and biogeochemical studies when the goal is to understand ecosystem and larger scale ecological phenomena. We believe that the diverse nature of our journal is a strength, not a weakness, and we are open-minded about the variety of data, research approaches and types of studies that we publish. Certain key areas will continue to be emphasized: studies that integrate genomics with ecology, studies that examine how key aspects of physiology (e.g., stress) impact the ecology of animals and plants, or vice versa, and how evolution shapes interactions among function and ecological traits. Ecology has increasingly moved towards the realization that organismal traits and activities are vital for understanding community dynamics and ecosystem processes, particularly in response to the rapid global changes occurring in earth’s environment, and Functional Ecology aims to publish such integrative papers.
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