Community congruence between macroinvertebrates and wetland dependent birds in natural wetlands of southwest Ethiopia     

《Limnologica》2020

Assessment and monitoring of biodiversity is critical for conservation planning. Considering the cost and time associated to monitoring, selecting proper bio-indicators is important, particularly in countries where financial resources are limited. The objectives of this study were to investigate community congruence of macroinvertebrates and wetland birds in natural wetlands of southwest Ethiopia, exposed to different levels of human disturbance and to identify important environmental variables related to these bio-indicators. Data on macroinvertebrates, birds, physico-chemical water quality, human disturbance and vegetation cover were collected from 54 sampling sites distributed over 12 wetlands during dry and wet season of 2015. Procrustes analysis was used to quantify community congruence between the two assemblages across different disturbance levels. The congruence of macroinvertebrates and wetland dependent birds was higher for low disturbed wetlands (R² = 0.60) than for moderately disturbed wetlands (R² = 0.31). Moderately disturbed wetlands showed no significant congruence between macroinvertebrates and wetland birds and between wetland dependent and wetland associated birds. A significant and positive relation between richness of macroinvertebrates and wetland dependent birds was observed when the full data set was used, whereas no significant relation was observed when the data was split according to the different levels of human disturbance. Vegetation cover, dissolved oxygen, water depth, total nitrogen, total phosphorus and conductivity were significantly correlated with both macroinvertebrate and wetland bird occurrence. Based on our study we suggest to monitor both bio-indicators as they provide important complementary information on the status of the wetlands.  相似文献   

西藏拉鲁湿地浮游植物群落时空分布特征及其驱动因子     

刘洋  安瑞志  杨号  张艳秋  陈俊霖  马文强  巴桑 《湖泊科学》2024,36(2):403-415

为了解西藏拉鲁湿地浮游植物群落时空分布特征及其驱动因子,于2021年7月、10月和2022年5月在拉鲁湿地主要水系进行定性和定量样品采集,共采集浮游植物水样126个,从不同季节和不同生境浮游植物种类组成、多样性等方面入手,探讨拉鲁湿地浮游植物群落时空分布特征及其驱动因子,为研究拉鲁湿地生态系统和稳定发展提供基础资料。结果表明:1)拉鲁湿地共鉴定出浮游植物532种(含变种和变型),隶属于8门13纲36目74科130属,物种组成表现为硅藻-绿藻-蓝藻型。2)拉鲁湿地浮游植物群落特征参数在不同季节和不同生境之间存在差异。夏季浮游植物群落的Shannon-Wiener多样性指数显著高于秋季和春季,Simpson优势度指数显著高于秋季。秋季浮游植物群落的Pielou均匀度指数显著低于夏季和春季。春季浮游植物群落的Margalef丰富度指数显著低于夏季和秋季。沼泽生境的浮游植物群落的Margalef丰富度指数显著高于湿草甸生境。3)季节是浮游植物群落组成差异的关键因素,生境对浮游植物群落组成的影响较弱,夏季的距离衰减模式比秋季和春季更强。4)拉鲁湿地不同的浮游植物群落参数与不同环境因子之间存在显著的关联。5)空间因素在解释浮游植物群落变异方面具有显著贡献,而快速变化的水质变量在决定浮游植物的季节变化中起着重要作用。季节和缓慢变化水质因子的解释能力相对较弱,但仍对浮游植物群落的变异有一定影响。  相似文献   

高原湿地生态结构特征与湿地保护区功能分区探讨   总被引：5，自引：0，他引：5  

田昆  李宁云  杨宇明 《湿地科学与管理》2005,1(1):22-26

通过对云南高原湿地自然保护区生态结构独 特性及其环境胁迫的分析,从湿地生态系统与陆生 生态系统的生态联系,以及湖滨带的物种组成、结 构特征和功能效益入手,探讨湿地保护区建设与保 护中生态结构特征与功能区分区的不相适性,提出 了湿地保护区功能区分区应遵循生态结构与功能特 征的对策建议。  相似文献