Results 21 to 30 of about 2,548 (157)
Shuitu Baochi Xuebao, 2011 为探讨科尔沁沙地小叶锦鸡儿固沙群落土壤微生物生物量和酶活性的季节动态规律,选取6,11,24年生人工群落和天然群落为对象,研究了不同土层深度微生物生物量(C、N、P)和脲酶、蛋白酶、蔗糖酶、磷酸单酯酶、脱氢酶和多酚氧化酶的活性随季节的变化特征。土壤按5层取样:0-10cm,10-20cm,20-30cm,30-40cm,40-50cm。结果表明,6～24年生小叶锦鸡人工固沙群落及天然群落土壤微生物生物量表现出明显的季节性变化,微生物生物量C和N为夏季>秋季>春季;微生物生物量P为夏季>秋季 ...
曹成有 +3 more
doaj
污水处理厂中浮游生物群落DNA指纹及其与水质指标的关系 [PDF]
, 2008 以武汉龙王嘴污水处理系统为研究对象,揭示了污水处理各阶段中浮游生物群落的DNA指纹拓扑结构,进而探索了其与浮游生物群落结构和环境理化因子的关系.首先建立了污水处理系统中浮游生物群落总DNA提取方法,然后用原核与真核特异性引物对流程(A2/O氧化沟工艺)中不同阶段的浮游生物群落总DNA进行PCR扩增,用变性梯度凝胶电泳(DGGE)检测,并对平行水样分别进行常规理化因子和浮游生物物种的检测与鉴定.结果显示,各采样点理化因子、物种组成与浮游生物DNA指纹的统计分析结果十分吻合,厌氧、缺氧和好氧阶段间差异较小,
余育和 +4 more
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Global Change Biology, Volume 31, Issue 11, November 2025.This study assessed the potential impacts of climate and land‐use change on soil fungal diversity across four North American biomes. We found that climate change typically caused both diversity losses and gains, particularly in coniferous forests and among arbuscular mycorrhizal fungi, whereas land‐use change mainly reduced diversity, especially in ...
Wenqi Luo +5 more
wiley +1 more source
The Relationship of Environmental Factors with Community Structures and Diversities of Microorganisms in Activated Sludge from Wastewater Treatment Plants [PDF]
, 2013 随着我国社会经济的飞速发展和城镇化进程的加快，大量肆意排放的废水造成水体严重污染，导致“水危机”日趋严重。废水在排入水体前，应首先由污水处理厂进行处理。较之于增加污水处理厂数量需要耗费大量资金成本，提高现有污水处理设施的废水处理效率至关重要。活性污泥法是污水处理厂应用最广泛的废水处理方式之一。由于在活性污泥系统中，微生物是去除污染物的主体。因此，深入了解活性污泥中微生物的群落结构与功能，理解其时空分布格局及受控机理，对于深化认识污水处理系统的本质，进而提高污水处理效率具有重要意义。此外 ...
杨晓永
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Analysis of Microbial Communities in Three Rounds of High-temperature Daqu Using Metagenomic Technology [PDF]
, 2023 Metagenomic sequencing technology was used to analyze the microbial community structures and functional composition in three rounds of Daqu. The results showed that the average assembly length of the 25 samples was 100.5 Mb, a total of 439 000 gene ...
WANG Guozheng, CHEN Bi, LU Jianjun, CHEN Liangqiang, ZHANG Qiaoling, LUO Han
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Functional Ecology, Volume 39, Issue 10, Page 2772-2789, October 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract The soil microbial community plays an important role in maintaining the functional balance of grassland ecosystems. However, it is unclear how soil microbial diversity and complexity change in the desert steppe under different grazing times and what ecosystem factors ...
Zhuo Liu +7 more
wiley +1 more source
High-throughput Sequencing Data Mining for Human Skin Microbial Communities [PDF]
, 2017 人体皮肤是人体抵御病原体的第一道防线，同时皮肤表面这个多样化的环境中共生着大量的微生物，包括细菌、真菌和病毒。如果将皮肤看作一个生态系统，那么它就是由各类微生物和皮肤表皮的组织细胞以及各种分泌物等共同组成的有机整体，维持着微生物群落与皮肤组织环境之间的微妙平衡，一旦这种平衡被打破就会引发皮肤感染或疾病。因此，研究皮肤微生物群落，了解皮肤不同微生物群落之间的关系，找出不同微生物群落之间的差异性就显得至关重要。 本文基于人体皮肤不同的微生物群落高通量测序数据样本，先采用基于短k-tuple的无需序列比对方法，
汪顺
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Functional Ecology, Volume 39, Issue 10, Page 2704-2716, October 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Moso bamboo (Phyllostachys edulis) invasions into broadleaf forests can cause serious ecological problems, such as reducing biodiversity and disrupting community succession.
Ting Zhou +5 more
wiley +1 more source
Response of carbon and nitrogen geochemical characteristics on the formation and decomposition of gas hydrate in sediments from the northern South China Sea [PDF]
, 2016 全球90%的海域分布有天然气水合物，其储量丰富，被认为是21世纪的重要清洁能源；天然气水合物的主要成分为甲烷，其增温潜力是CO2的23倍之多。因此，海底天然气水合物具有重要的能源、经济、环境效应。我国南海具有天然气水合物成藏的有利温度、压力、地质构造等条件，尤其是在南海北部神狐海域和珠江口盆地，广州海洋地质调查局先后于2007年、2013年、2016年钻获水合物实物样品。因而，研究南海北部不同海域天然气水合物潜在区沉积物碳氮地化特征对水合物生成/分解的响应，对我国天然气水合物勘探开发具有重要的现实意义。
杨玉峰
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Veterinary Dermatology, Volume 36, Issue 5, Page 668-678, October 2025.Background – Erythemato‐ceruminous otitis externa (ECOE) is commonly associated with Malassezia spp. and microbial imbalance. Hypothesis/Objective – To assess the clinical performance of an ear cleaner in dogs suffering from ECOE associated with Malassezia spp. overgrowth and to measure its impact on the microbiota. Conclusions and Clinical Relevance –
Amaury Briand +11 more
wiley +1 more source