Results 41 to 50 of about 3,597 (163)

Threshold responses of floating meadow fish communities to floodplain forest cover in the lower Amazon River

open access: yesConservation 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
wiley   +1 more source

烟台近海大型底栖动物群落特征 [PDF]

open access: yes, 2013
根据2010年和2011年对烟台近海大型底栖动物的周年调查资料,采用优势度指数、物种多样性指数及Cluster聚类和MDS排序方法,进行群落特征和群落演替情况的。研究。结果表明,该海域共采集大型底栖动物176种,其中优势类群为多毛类。群落中的优势种主要包括短叶索沙蚕和不倒翁虫。烟台近海年平均生物量和丰度分别为16.72g/m~2和1022ind/m~2,且存在季节性差异。丰富度指数(D)、均匀度指数(J)和多样性指数(H')的年平均值分别为2.30、0.70和1.91 ...
李宝泉, 王全超
core   +1 more source

Role of forest edges and other seminatural linear landscape features in structuring wild bee habitat connectivity in intensively managed landscapes

open access: yesConservation 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
wiley   +1 more source

Study on flora composition and species diversity of Pseudotaxus chienii communities in Fengyangshan Nature Reserve(凤阳山白豆杉各群落区系组成和物种多样性的比较研究)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2006
在对凤阳山白豆杉种群进行野外调查的基础上,分析了其群落的区系及物种多样性.结果表明:凤阳山白豆杉群落中共有维管植物59科104属160种(含变种),其中蕨类植物5科6属8种,裸子植物4科7属8种,被子植物49科88属142种.区系成分复杂,大部分属于温带和热带分布类型,其中温带类型占总属数的58.
DINGBing-yang(丁炳扬“)   +3 more
doaj   +1 more source

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]

open access: yes, 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
core  

Aridity and grazing are associated with reduced trait complementarity and higher invasion intensity of Solanum rostratum in native plant communities

open access: yesFunctional 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
wiley   +1 more source

江苏大丰盐沼鸟类群落空间结构的影响因素研究

open access: yes野生动物学报, 2015
鸟类的个体空间分布和群落空间结构有多种影响因素,以往多数研究主要关注生境偏好的重要作用,而忽略个体间相互作用的影响,原因之一是较难排除环境所起的作用。互花米草(Spartina alterniflora)作为一种外来入侵植物扩散到江苏大丰麋鹿国家级自然保护区之后,在当地盐沼生境形成了以互花米草为优势种的单优群落和与本土植被构成的混生群落。该群落生境类型为同时探究个体间相互作用及生境偏好在鸟类群落空间结构中的作用提供了一个十分难得的天然实验场。前期对保护区调查发现该生境中繁殖鸟的种类和数量都较少 ...
张星烁 郝 志 赵鲁安 陈利红 李 枫 孙大明 刘 彬
doaj  

四川卧龙国家级自然保护区雪豹地栖动物群落初探

open access: yes野生动物学报, 2021
以四川卧龙国家级自然保护区为研究区域,利用2017年4月至2018年4月采集到的红外相机数据,分析了地栖动物群落种间空间关联性、结构、维持机制,以及雪豹(Panthera uncia)在群落维持中的生态学作用,从而判断雪豹的生态价值。结果显示:①从有效红外照片中共鉴定出6目15科35种地栖动物。②通过phi系数检验,发现13种地栖动物与雪豹存在直接或间接空间关联,它们分别是喜马拉雅旱獭(Marmota himalayana)、赤狐(Vulpes vulpes)、香鼬(Mustela altaica ...
周厚熊 1   +1 more
doaj  

Study On Phytoplankton Coummunity Structure And Dynamics In Changjiang Estuary And Its Adjacent Waters, And The Evolution Of Typical Diatom Genus Chaetoceros Ehrenberg [PDF]

open access: yes, 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
core  

Moderate time grazing in the warm season maintained the diversity and complexity of soil microorganisms by regulating nutrient cycling and decomposition function

open access: yesFunctional 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

Home - About - Disclaimer - Privacy