Results 61 to 70 of about 3,874 (209)
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Forest cover is positively associated with fish biomass and fisheries yield in the Amazon River floodplain, and many species enter flooded forests to feed, spawn, or seek refuge from predation. Floating macrophyte beds, known as floating meadows, in Amazon floodplains support high fish diversity and serve as nursery habitat for many fishes of ...
Sam Grinstead +6 more
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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
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月湖底泥疏浚后底栖动物群落的恢复及其与环境的关系 [PDF]
, 2012 研究对月湖底泥疏浚后底栖动物群落动态进行逐月的周年调查,并分析了底栖动物密度、生物多样性与环境因子的关系,结果表明:疏浚导致大型底栖动物基本消失,现存量从疏浚前的(4387±885)ind·m-2降低至(80±21)ind·m-2。疏浚后,寡毛类成为受干扰系统恢复过程中的先锋种类,在春季(4月)和秋冬之际(11月)出现2个密度高峰,分别为(1010±230)ind·m-2和(1538±408)ind·m-2,而摇蚊幼虫在疏浚一年后的秋冬季密度达到高峰(2021±612)ind·m-2 ...
周易勇 +4 more
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Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Pollinator conservation schemes typically focus on conserving existing, restoring degraded, or creating new wild bee habitats. Their effectiveness depends on dispersal corridors enabling habitat colonization by bees. However, the role of seminatural linear landscape structures (LLS) in connecting pollinator communities across intensively ...
Markus A. K. Sydenham +6 more
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Study On Phytoplankton Coummunity Structure And Dynamics In Changjiang Estuary And Its Adjacent Waters, And The Evolution Of Typical Diatom Genus Chaetoceros Ehrenberg [PDF]
, 2016 长江口及其邻近海域是我国典型富营养化海域，也是赤潮高发区，而硅藻和甲藻是海洋浮游植物的主要组成种类，同时也是近岸赤潮生物的主要组成类群。本论文主要通过对长江口及其邻近海域浮游植物种类组成与细胞密度时空分布的研究，阐明该海域浮游植物群落结构和动态，结合环境因子分析其受控机制，为该赤潮高发区浮游植物群落演替机制的研究和赤潮检测提供基础数据和科学依据。同时，本文针对浮游植物地理分布与盐度关系这一科学问题，选择一种在沿岸水域广泛分布且经常形成赤潮的典型硅藻属—角毛藻作为研究对象，从形态学 ...
李静
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Functional Ecology, Volume 39, Issue 11, Page 3255-3268, November 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract The biotic resistance hypothesis (BRH) of Elton posits that diverse communities are more resistant to biological invasions. While the effects of climatic stresses and human disturbances on community invasibility have been extensively studied individually, their combined
Kai Shi, Misbah Naz, Chi Zhang, Hua Shao
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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
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Colonization dynamics of periphytic diatoms in coastal water of Qingdao, northern China [PDF]
, 2016 本研究旨在研究青岛近岸周丛硅藻群集过程的动力学特征。采样地点为青岛奥林匹克帆船中心，采样方法为悬挂载玻片人工基质法。在2014年的5月至6月进行为期一个月的预实验以确定采样策略。结果表明，在设定的1米和3米采样水层，尽管周丛硅藻群落结构相似，但1米水层的物种数高于3米水层。在整个周丛硅藻群集阶段，分类学多样性指数表明了两水层有高度的差异性（差异系数>10%），分类学差异指数、平均分类学差异指数和分类学差异变异指数表明在群集7天以后周丛硅藻群落具有了较高的相似性（差异系数The temporal ...
杨中文
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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
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
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