堆积物和脱落物对受干扰和未受干扰土壤中植物生长的改变是不同的

IF 4.6 1区 环境科学与生态学 Q1 ECOLOGY Functional Ecology Pub Date : 2024-05-19 DOI:10.1111/1365-2435.14589
Ondřej Mudrák, Epp Maria Lillipuu, Kateřina Čápová, Tomáš Cajthaml, Jan Frouz
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摘要

植物物种通过其废弃物影响关键的生态系统过程,如养分循环和整个生态系统的生产力。枯落物影响的结果主要取决于其可分解性,而可分解性会直接影响土壤性质。如果枯落物保持静止或未脱落(即木质化),其最终的可分解性会因难降解结构(如木质素)的光降解而提高。如果枯落物立即脱落,其可分解性主要取决于其原有的养分含量。此外,植物物种还可能通过其他更直接的方式影响土壤。然而,目前还不清楚萌发的枯落物和立即脱落的枯落物对土壤以及植物的影响是否不同,植物对土壤的直接影响是否与萌发的枯落物和脱落的枯落物的影响相互影响,以及这些相互影响在不同的土壤条件下是否一致。我们建立了一个盆栽实验,在长期稳定的古草地和 20 年前在耕地上恢复的草地的对比土壤中,测试了最初萌发的腐殖质和脱落的腐殖质(均添加在盆栽土壤表面)对三种草地物种(直立草、Filipendula vulgaris 和车前草)的影响。我们还测试了枯落物类型和植物种类如何影响土壤化学性质和微生物群落(以 PLFA 标记为特征)。腐殖质枯落物的养分含量较低,但仍比脱落枯落物更能增加植物生物量,尽管仅对禾本科植物而言(可能是由于土壤养分的调动)。枯落物对土壤化学性质和微生物群落的影响较小,主要受盆栽植物种类的影响。在未受干扰的古草地土壤中,这些物种对微生物群落的影响更大,而在受干扰的恢复草地土壤中,植物物种主要影响化学特性。直立芽孢杆菌减缓了恢复草地土壤中两种类型枯落物的分解速度。痕状枯落物对活体植物的影响是显著的,但有物种特异性,并取决于土壤条件。沼泽化似乎对受干扰土壤中的植物有更强的影响,这表明沼泽化对受干扰后生态系统的恢复非常重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Standing and shed litters alter plant growth in disturbed and undisturbed soils differently

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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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