Results 51 to 60 of about 3,597 (163)
Zhejiang Daxue xuebao. Lixue ban, 2014 城市湿地水质受人类活动影响，其水系浮游细菌群落多样性也因水质状况不同而变化.以杭州西溪湿地国家公园为研究区，分析人类活动特征差异对河道水质及浮游细菌群落多样性的影响，测定溶解氧、氨氮、硝氮、总氮、总磷等主要理化指标，运用聚合酶链式反应与变性梯度凝胶电泳(PCR-DGGE)技术，分析各水样中浮游细菌群落多样性，通过主成分分析与典型对应分析等统计手段，比较各项理化指标与细菌群落结构的相关性.研究结果表明：湿地河道水质受人类活动影响显著，呈中度~重度富营养化；河道水域内细菌群落总体多样性较高 ...
NIYanyan(倪燕燕) +6 more
doaj +1 more source
Community Structure and Metabolic Activity of Bacterioplankton during Phytoplankton Blooms [PDF]
, 2016 浮游细菌作为海洋生态系统的重要组成部分，在海洋生态系统的物质循环和能量流动中起着重要作用。一方面，浮游细菌通过再矿化作用，将海水中的有机化合物转变为无机物质，为藻类的生长提供各种必需营养元素。另一方面，某些细菌具有抑藻杀藻特性，对藻类的生长起着调控作用。因此，菌-藻关系研究已成为当前海洋浮游植物藻华研究的热点之一。 本论文运用16SrDNA技术探究了不同类型浮游植物藻华期间浮游细菌群落结构；运用宏蛋白质组学技术分析了东海原甲藻藻华爆发期中期和后期浮游细菌群落蛋白质表达谱 ...
李东旭
core
Integrative Conservation, Volume 4, Issue 3, Page 476-490, September 2025.The leaf functional traits of angiosperms and gymnosperms in mountain ecosystems significantly influence phyllosphere fungal diversity. These traits are critical for understanding fungal stress resistance and elevational adaptation, which aids in predicting plant responses to climate change.
Xiaocheng Yu +7 more
wiley +1 more source
牛山湖两种不同生境小型鱼类的种类组成、多样性和密度 [PDF]
, 2007 研究了2003年春季浅水草型湖泊牛山湖小型鱼类空间分布(种类组成、多样性和密度等)与生境异质性之间的关系.根据水生植被状况、离岸距离和水深,选择了两种差异较大且有代表性的生境类型,即近岸沉水植物茂密的生境A和远岸沉水植物稀疏的生境B.使用围网(180m2)在这两种生境中进行小型鱼类的采样,采用多次标志回捕法和Zippin去除法估算了围网内小型鱼类的密度.结果表明,两种不同生境中小型鱼类的种类组成、多样性度量值和密度估算值均存在一定程度的差异:1)生境A中的渔获物由5科14种小型鱼类组成 ...
叶少文, 曹文宣, 李钟杰
core
Functional Ecology, Volume 39, Issue 9, Page 2327-2341, September 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract While elevational patterns of soil bacterial and fungal communities in mountain ecosystems have been well documented, the assembly processes of soil archaeal and protistan communities, and their linkage with ecosystem multifunctionality (EMF), remain poorly understood ...
Bao‐Min Yao +14 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 为明确不同物种组成和群落结构的河岸林对降雨再分配及其养分特征的影响，于2014年5—10月对辽东山地典型河岸林群落（落叶松林、蒙古栎林和槭树林）大气降雨、穿透雨和树干茎流过程及其水质特征进行研究。结果表明：落叶松林、蒙古栎林和槭树林穿透雨量分别占大气降雨量的81.9%，77.9%，73.1%，树干茎流量分别占大气降雨量的1.2%，4.4%，4.3%。与大气降雨相比，穿透雨和树干茎流中铵态氮、氯离子、硝态氮和总磷的浓度较高，不同林型铵态氮、氯离子、硝态氮和总磷的浓度和输入量差异显著 ...
王琼 +5 more
doaj
Opportunities, research gaps, and risks in allogenic ecosystem engineer mimicry
Conservation Biology, Volume 39, Issue 4, August 2025.Abstract In an age of anthropogenically driven species loss and increasingly novel ecosystems, ecosystem engineer restoration is a process‐based approach to supporting ecosystem function. Many ecosystem engineers have low or declining population sizes.
Brandi Goss +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2020 以苏打盐碱土为供试土壤，设置0，3.0，7.5，12.0，16.5 t/hm2 5个梯度生物炭还田量，通过盆栽试验研究不同量生物炭连续多年还田对苏打盐碱水稻土养分及真菌群落结构的影响。结果表明：（1）不同量生物炭还田后，提高了土壤pH、有机质、速效钾、有效磷和全磷含量，土壤全氮和全钾含量呈现先增加后降低的趋势，对盐碱土起到了改良的效果。（2） Illumina MiSeq测序结果表明，还田量为7.5 t/hm2时，Aphelidiomycota、担子菌门以及链格孢属的相对丰度显著高于对照；还田量为12 ...
李红宇 +4 more
doaj
Microbial mediation and mechanism derived from electron shuttle on the speciation of arsenic/iron from arsenic-enriched tailing mine sediments [PDF]
, 2016 沉积物的砷污染及危害对动植物及地下水等生态环境已经构成严重威胁。自然环境中微生物对砷的化学形态及循环方面起重要的作用。但是，微生物驱动金属(砷/铁)还原溶解过程可以是多条路径的，而金属在介质环境的解离/释放过程与环境中微界面中的微生物、外源载体和溶解性有机质(dissolvedorganicmatter，DOM)等密切相关。本文以中国湖南省石门县雄黄尾矿沉积物作为研究对象，通过以几种不同电子中介体——蒽醌-2，6-磺酸钠(anthraquinone-2，6-disulfonate，AQDS ...
陈铮
core
Ecological Solutions and Evidence, Volume 6, Issue 3, July–September 2025.Over the past three decades, a large number of natural wild soybean populations have been declining inexplicably or even have disappeared and their distribution area has significantly decreased in China, and population losses continue unabated. Therefore, this study investigated 20 herbaceous communities of wild soybeans in various habitats in ...
Ke‐Jing Wang, Xiang‐Hua Li
wiley +1 more source