{"title":"干旱引发的土壤微生物生物量更替增加了热带森林繁衍所需的养分补贴","authors":"Kazumichi Fujii, Chie Hayakawa, Sukartiningsih","doi":"10.1007/s10533-024-01137-z","DOIUrl":null,"url":null,"abstract":"<div><p>El Niño-induced drought, which is intensified by climate change, can have huge impacts on soil microbial biomass and plant productivity in tropical forests. We tested whether drought-induced turnover of soil microbial biomass can be a potential source of phosphorus (P), the limiting nutrient, for the reproduction of tropical forest trees (mast fruiting). We measured the seasonal variations in soil microbial biomass P and soil solution P concentrations including the periods before and after drought in a dipterocarp forest in Indonesia. Drought resulted in a decrease in soil microbial biomass C, N, and P, followed by a recovery after re-wetting. There was a sharp peak of soil solution P concentrations during the drought. The significant difference between soil microbial biomass P before and after drought amounted to 2.0 kg P ha<sup>−1</sup>. The potential P release from microbial turnover is not negligible compared to the additional P demand for fruit production (1.0 kg P ha<sup>−1</sup>) as well as the annual demand for litter production (2.5 kg P ha<sup>−1</sup> year<sup>−1</sup>). In addition to the accumulation of nutrients for several non-fruiting years and their re-distribution in tree biomass, drought-induced microbial turnover can be nutrient subsidies for dipterocarp reproduction in highly-weathered soils.</p></div>","PeriodicalId":8901,"journal":{"name":"Biogeochemistry","volume":null,"pages":null},"PeriodicalIF":3.9000,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10533-024-01137-z.pdf","citationCount":"0","resultStr":"{\"title\":\"Drought-induced turnover of soil microbial biomass increases nutrient subsidies for the reproduction of tropical forest\",\"authors\":\"Kazumichi Fujii, Chie Hayakawa, Sukartiningsih\",\"doi\":\"10.1007/s10533-024-01137-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>El Niño-induced drought, which is intensified by climate change, can have huge impacts on soil microbial biomass and plant productivity in tropical forests. We tested whether drought-induced turnover of soil microbial biomass can be a potential source of phosphorus (P), the limiting nutrient, for the reproduction of tropical forest trees (mast fruiting). We measured the seasonal variations in soil microbial biomass P and soil solution P concentrations including the periods before and after drought in a dipterocarp forest in Indonesia. Drought resulted in a decrease in soil microbial biomass C, N, and P, followed by a recovery after re-wetting. There was a sharp peak of soil solution P concentrations during the drought. The significant difference between soil microbial biomass P before and after drought amounted to 2.0 kg P ha<sup>−1</sup>. The potential P release from microbial turnover is not negligible compared to the additional P demand for fruit production (1.0 kg P ha<sup>−1</sup>) as well as the annual demand for litter production (2.5 kg P ha<sup>−1</sup> year<sup>−1</sup>). In addition to the accumulation of nutrients for several non-fruiting years and their re-distribution in tree biomass, drought-induced microbial turnover can be nutrient subsidies for dipterocarp reproduction in highly-weathered soils.</p></div>\",\"PeriodicalId\":8901,\"journal\":{\"name\":\"Biogeochemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.9000,\"publicationDate\":\"2024-04-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s10533-024-01137-z.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biogeochemistry\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10533-024-01137-z\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biogeochemistry","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s10533-024-01137-z","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0
摘要
厄尔尼诺现象引发的干旱会对热带森林的土壤微生物生物量和植物生产力产生巨大影响，而气候变化又会加剧这种影响。我们测试了干旱引起的土壤微生物生物量更替是否可能成为热带林木（桅子果）繁殖所需的限制性养分磷（P）的潜在来源。我们测量了印度尼西亚双子叶植物森林中土壤微生物生物量磷和土壤溶液磷浓度的季节性变化，包括干旱前后的变化。干旱导致土壤微生物生物量C、N和P的减少，随后在重新湿润后恢复。在干旱期间，土壤溶液中的磷浓度出现了一个急剧的峰值。干旱前后土壤微生物生物量 P 的显著差异达到 2.0 千克 P ha-1。与果实生产（1.0 千克 P 公顷-1）和垃圾生产（2.5 千克 P 公顷-1 年-1）对钾的额外需求相比，微生物代谢释放的潜在钾不容忽视。除了养分在几个非结果年份的积累及其在树木生物量中的重新分配外，干旱引起的微生物更替还能为二叉树在风化严重的土壤中的繁殖提供养分补贴。
Drought-induced turnover of soil microbial biomass increases nutrient subsidies for the reproduction of tropical forest
El Niño-induced drought, which is intensified by climate change, can have huge impacts on soil microbial biomass and plant productivity in tropical forests. We tested whether drought-induced turnover of soil microbial biomass can be a potential source of phosphorus (P), the limiting nutrient, for the reproduction of tropical forest trees (mast fruiting). We measured the seasonal variations in soil microbial biomass P and soil solution P concentrations including the periods before and after drought in a dipterocarp forest in Indonesia. Drought resulted in a decrease in soil microbial biomass C, N, and P, followed by a recovery after re-wetting. There was a sharp peak of soil solution P concentrations during the drought. The significant difference between soil microbial biomass P before and after drought amounted to 2.0 kg P ha−1. The potential P release from microbial turnover is not negligible compared to the additional P demand for fruit production (1.0 kg P ha−1) as well as the annual demand for litter production (2.5 kg P ha−1 year−1). In addition to the accumulation of nutrients for several non-fruiting years and their re-distribution in tree biomass, drought-induced microbial turnover can be nutrient subsidies for dipterocarp reproduction in highly-weathered soils.
期刊介绍：
Biogeochemistry publishes original and synthetic papers dealing with biotic controls on the chemistry of the environment, or with the geochemical control of the structure and function of ecosystems. Cycles are considered, either of individual elements or of specific classes of natural or anthropogenic compounds in ecosystems. Particular emphasis is given to coupled interactions of element cycles. The journal spans from the molecular to global scales to elucidate the mechanisms driving patterns in biogeochemical cycles through space and time. Studies on both natural and artificial ecosystems are published when they contribute to a general understanding of biogeochemistry.
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