维普中文期刊产品整合服务
7篇 您的检索式:作者名="Ruben Miranda"
    题名 作者 年代 出处 被引量
1Vegetative development of arabica coffeeplants grafted onto robusta coffee,subjected to waterreplacement 显示文摘Wezer Lismar Miranda Rubens Jos6 Guimaraes Pedro BuenoMagalhaes 2011Pesq Agropec Bras Brasilia2011,46,12:1
2Identification of Recalcitrant Stickies and Their Sources in Newsprint Production显示文摘Ruben Miranda Ana Balea et 2008Industrial & Engineering Chemistry Research2008,47,16:1
3NiO-CGO Composite for SOFC Anode: Synthesis and Characterization显示文摘Beatriz Cela Daniel Araujo de Macedol Graziele Lopes de Souza Auristela Carla de Miranda Antonio Eduardo Martine Rubens Maribondo do Nascimento Carlos Alberto Paskocimas 2010材料科学与工程(中英文版)2010,4,5:0
4Hydrological variability and long-term floristic-structural modifications in different habitats of a tropical semi-deciduous forest显示文摘Shifts in hydrological regimes alter river flow rates and flood pulses, decrease environmental heterogeneity and the floristic-structural complexity of associated plant communities. We tested the hypothesis that drought events affect plant community composition and structure at a small-scale within a riparian fragment towards a reduction in floristic-structural complexity. The tree community was sampled in three habitats (wet, transitional and dry) and monitored in seven inventories carried out between 1991 and 2018. Hydrological variations were evaluated through annual rainfalls, river flow rates and water level data. The species richness and the detrended correspondence analysis axes were used to characterise the temporal modifications in floristic composition. Community structure was described in terms of biomass: accumulated, growth of survivors, mortality and recruitment. Generalised linear mixed models were fitted to evaluate the effects of time and environment in community. It was concluded that the climate has become drier in recent years due to declining precipitation that has affected flow rates and water levels. The floristic-structural complexity of the study fragment was maintained during the monitoring period. However, prolonged and extreme drought events displayed the potential to impact floristic-structural patterns.Alisson Borges Miranda Santos Vinicius Andrade Maia Cléber Rodrigo de Souza Natália de Aguiar-Campos Aurélio de Jesus Rodrigues Pais Wilder Bento da Silva Nathalle Cristine Alencar Fagundes Jean Daniel Morel Rubens Manoel dos Santos 2022Journal of Forestry Research2022,33,3:0
5空间、环境和历史因素对热带森林树种周转的影响显示文摘本文通过回答以下问题来分析空间距离、当前和过去的环境差异及这几个因素对树木群落分类和系统发育转换的影响:(i)树木群落分类和系统发育转换是否与空间距离通过环境差异产生的间接影响相关?(ii)树木群落分类和系统发育转换是否随古气候(末次盛冰期和中全新世)的变化而变化?本文对巴西的14个大西洋雨林样点(采样面积20.4 ha)83个科615个种进行了研究,获得了当前、中全新世和末次盛冰期的地块地理坐标、土壤变量和样点生物气候变量。我们使用基于距离的结构方程模型(SEM)来(i)检测空间距离和环境差异的直接影响,以及(ii)检测空间距离通过环境差异对分类(Bray-Curtis距离)和系统发育转换(Comdist和Comdistnt距离)的间接影响。研究结果表明,空间距离通过环境差异对分类和系统发育转换的间接影响较弱。基于生态位中性的历史过程带来的直接影响驱动了树木群落的转换。因此,我们推断古气候(历史过程)促进了产生当前植物区系分支的选择,而空间距离(中性的过程)限制了物种从区域种库向外扩散的范围,环境条件(基于生态位的过程)则在本地选择能够持续生存的分类群。Alisson Borges Miranda Santos Vinicius Andrade Maia Cleber Rodrigo de Souza Nathalle Cristine Alencar Fagundes Fernanda Moreira Gianasi Aurelio de Jesus Rodrigues Pais Natalia de Aguiar-Campos Gabriela Gomes Pires Diego Teixeira Girardelli Jean Daniel Morel Mariana Caroline Moreira Morelli Felipe de Carvalho Araujo Rubens Manoel dos Santos 2021Journal of Plant Ecology2021,14,4:0
6Small-scale edaphic heterogeneity as a floristic-structural complexity driver in Seasonally Dry Tropical Forests tree communities显示文摘Our work aimed to test the hypothesis that soil microscale heterogeneity act as a community ecological driver,increasing diversity and promoting structural shifts on the Seasonally Dry Tropical Forest(SDTF)tree community.We evaluated the relationship between microscale edaphic variations and floristic–structural patterns of tree communities in a SDTF fragment located in the southern end of the Brazilian Caatinga domain.Vegetation and soil data were obtained through 27 sample units of 400 m2(20 m 920 m),within each one we measured and identified at species level all arboreal individuals with Circumference at the Breast Height greater or equal to 10 cm,and also collected the soil samples.Through the data we evaluated soil variation influence on the tree community structural and floristic patterns trough generalized linear models.Soil explained the small-scale structural and floristic variations,contributing significantly to biomass,sprouting and to floristic relationships between sample units.It was also observed a possible relation of the result with the Caatinga domain biogeographic history,due the presence of Sedimentary Caatinga species,which are not expected for the study region.Soil plays an important role in driving small-scale complexity and diversity of SDTF,but we also suggest that Caatinga biogeographic events have influence on the high heterogeneity patterns.Cle´ber Rodrigo de Souza Jean Daniel Morel Alisson Borges Miranda Santos Wilder Bento da Silva Vinı´cius Andrade Maia Polyanne Aparecida Coelho Vanessa Leite Rezende Rubens Manoel dos Santos 2020Journal of Forestry Research2020,31,6:0
7Can small-scale altitudinal gradients predict spatial and temporal patterns in tropical forests?显示文摘In tropical montane forests,compositional and structural changes are commonly driven by broad-scale altitudinal variation.Here,given the lack of knowledge on small-scale vegetation changes and temporal dynamics,we address the effects of small-scale variations in soil and altitude on tree community structure,temporal dynamics and phylogenetic diversity in a semi-deciduous tropical forest of the Atlantic Forest Domain,southeastern Brazil.In 2010 and 2015 we sampled thirty plots of 400 m^(2),set up along an altitudinal gradient between 1000 and 1500 m a.s.I..In each plot,we collected soil samples for chemical and textural analyses.We fitted linear models to test the effects of altitude and soil on community dynamics and phylogenetic parameters.Altitude and soil explained the spatial variation in number of individuals and phylogenetic diversity metrics.From lower to higher altitudes,we found decreasing fertility,increasing tree density and decreasing phylogenetic diversity.Altitude significantly influenced the increases in total biomass(from 240.9 to 255.4 t ha^(-1))and individual biomass(from 0.15 to 0.17 t)recorded in the interval.And while community temporal dynamics had rates of 1.96%for mortality,1.02%for recruitment,1.61%for biomass loss and 2.81%for biomass gain,none of them were explained by altitude or soil.Temporal species substitution averaged0.1 in the interval.Altogether,these results suggest that the small-scale variations in altitude and soil likely determine the conditions and resources that drive community assembly and structure,which are expressed by spatial variations along the altitudinal gradient.At the same time,temporal patterns were not influenced by altitude-related environmental variation,resulting in a similar dynamic behaviour across the gradient,suggesting that broad-scale factors may play a more important role than local ones.Mariana Caroline Moreira Morelli Cléber Rodrigo de Souza Jean Daniel Morel Vinícius Andrade Maia Alisson Borges Miranda Santos Kaline Fernandes Miranda Rubens Manoel dos Santos 2021Journal of Forestry Research2021,32,5:0
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费