Carbon acquisition ecological strategies to connect soil microbial biodiversity and carbon cycling
Carbon acquisition ecological strategies to connect soil microbial biodiversity and carbon cycling
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DOI：
10.1016/j.soilbio.2022.108893
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发表时间：
2023-02
影响因子：
9.7
通讯作者：
E. Morrissey;Jennifer L. Kane;B. Tripathi;M. Rion;B. Hungate;R. Franklin;Chris Walter;B. Sulman-B.-Sulm
中科院分区：
文献类型：
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作者：
E. Morrissey;Jennifer L. Kane;B. Tripathi;M. Rion;B. Hungate;R. Franklin;Chris Walter;B. Sulman-B.-Sulm
土壤碳对全球变化的反馈是不确定的，目前的生态系统模型中没有解决土壤有机质分解的生物过程。尽管人们认识到微生物生物多样性影响分解速率，但将这种关系纳入生态系统模型具有挑战性，因为微生物群落的多样性令人望而却步。可能有必要通过关注功能组或生态策略来提取微生物生物多样性。目前占主导地位的微生物生态学文献的生态策略来自宏观生态学理论，有明显的弱点，并已有限的成功时，应用于预测土壤碳动态。在这里，我们提出了一个新的框架土壤微生物：碳获取生态策略（CAES），我们概述了一条道路，将微生物生物多样性纳入生态系统模型使用这个框架，以提高预测土壤碳反馈到全球变化。由于微生物的饮食是其生态位的核心，并可能与其他生态显着的特征，我们认为，碳收购可能作为一个易于处理的基础，制定生态策略。我们描述了土壤微生物的四种候选生态策略：1°分解者同化复杂的植物聚合物，2°分解者同化微生物坏死物质，被动消费者同化溶解的有机碳，和捕食性微生物同化活的微生物生物量。这些策略与目前在生态系统模型中代表的土壤碳库直接相关，并可能为微生物群落动态更好地整合到生态系统模型中提供基础。
Soil carbon feedbacks to global change are uncertain, and the biological processes that govern soil organic matter decomposition are not resolved in current ecosystem models. Though it is recognized that microbial biodiversity influences decomposition rates, incorporating this relationship into ecosystem models is challenging because microbial communities are prohibitively diverse. It is likely necessary to distill microbial biodiversity by focusing on functional groups or ecological strategies. The ecological strategies that currently dominate the microbial ecology literature derive from macroecological theory, have clear weaknesses, and have had limited success when applied to predict soil carbon dynamics. Here, we present a new framework for soil microorganisms: Carbon Acquisition Ecological Strategies (CAES), and we outline a path toward incorporating microbial biodiversity into ecosystem models using this framework to enhance predictions of soil carbon feedbacks to global change. Because a microorganism's diet is central to its ecological niche and likely to covary with other ecologically significant traits, we posit that carbon acquisition may serve as a tractable foundation for developing ecological strategies. We describe four candidate ecological strategies for soil microorganisms:1° decomposersthat assimilate complex plant polymers,2° decomposersthat assimilate microbial necromass,passive consumersthat assimilate dissolved organic carbon, andpredatory microbesthat assimilate live microbial biomass. These strategies are directly linked to soil carbon pools currently represented in ecosystem models and may provide a foundation for greater integration of microbial community dynamics into ecosystem models.