Pei Lixin, Ye Siyuan, Xie Liujuan, Zhou Pan, He Lei, Yang Shixiong, Ding Xigui, Yuan Hongming, Dai Tianjiao, Laws Edward A
Qingdao Institute of Marine Geology, China Geologic Survey, Qingdao, China.
Laboratory for Marine Geology, Qingdao Marine Science and Technology Center, Qingdao, China.
Front Microbiol. 2024 Mar 27;15:1347821. doi: 10.3389/fmicb.2024.1347821. eCollection 2024.
The impact of climate warming on soil microbial communities can significantly influence the global carbon cycle. Coastal wetlands, in particular, are susceptible to changes in soil microbial community structure due to climate warming and the presence of invasive plant species. However, there is limited knowledge about how native and invasive plant wetland soil microbes differ in their response to warming. In this study, we investigated the temporal dynamics of soil microbes (prokaryotes and fungi) under experimental warming in two coastal wetlands dominated by native () and invasive (). Our research indicated that short-term warming had minimal effects on microbial abundance, diversity, and composition. However, it did accelerate the succession of soil microbial communities, with potentially greater impacts on fungi than prokaryotes. Furthermore, in the wetland, experimental warming notably increased the complexity and connectivity of the microbial networks. While in the wetland, it decreased these factors. Analysis of robustness showed that experimental warming stabilized the co-occurrence network of the microbial community in the wetland, but destabilized it in the wetland. Additionally, the functional prediction analysis using the Faprotax and FunGuild databases revealed that the wetland had a higher proportion of saprotrophic fungi and prokaryotic OTUs involved in carbon degradation ( < 0.05). With warming treatments, there was an increasing trend in the proportion of prokaryotic OTUs involved in carbon degradation, particularly in the wetland. Therefore, it is crucial to protect native wetlands from invasion to mitigate carbon emissions and preserve the health of coastal wetland ecosystems under future climate warming in China.
气候变暖对土壤微生物群落的影响会显著影响全球碳循环。特别是沿海湿地，由于气候变暖和入侵植物物种的存在，极易受到土壤微生物群落结构变化的影响。然而，关于本地和入侵植物湿地土壤微生物对变暖的反应有何不同，我们所知有限。在本研究中，我们调查了在实验性升温条件下，两个分别以本地（ ）和入侵（ ）植物为主的沿海湿地中土壤微生物（原核生物和真菌）的时间动态。我们的研究表明，短期变暖对微生物丰度、多样性和组成的影响极小。然而，它确实加速了土壤微生物群落的演替，对真菌的潜在影响可能大于原核生物。此外，在 湿地中，实验性升温显著增加了微生物网络的复杂性和连通性。而在 湿地中，它降低了这些因素。稳健性分析表明，实验性升温使 湿地中微生物群落的共现网络稳定，但使 湿地中的共现网络不稳定。此外，使用Faprotax和FunGuild数据库进行的功能预测分析表明， 湿地中腐生真菌和参与碳降解的原核生物OTU比例更高（ ＜0.05）。随着升温处理，参与碳降解的原核生物OTU比例呈上升趋势，尤其是在 湿地中。因此，在中国未来气候变暖的情况下，保护本地 湿地免受 入侵对于减少碳排放和维护沿海湿地生态系统健康至关重要。
