期刊文献+
共找到9篇文章
< 1 >
每页显示 20 50 100
基于环境因素变化的动态表皮设计研究
1
作者 苗舒康 乔楠 姬昂 《工业设计》 2022年第8期92-94,共3页
建筑表皮作为连接室内与室外气候的过渡层,对于调节室内舒适度起着重要的作用。一般的建筑表皮难以应对复杂的气候环境,动态表皮作为一种特殊的建筑表皮,较一般的建筑表皮具有更强的适应性、灵活的可调节性、更好的能源节约性等优点。... 建筑表皮作为连接室内与室外气候的过渡层,对于调节室内舒适度起着重要的作用。一般的建筑表皮难以应对复杂的气候环境,动态表皮作为一种特殊的建筑表皮,较一般的建筑表皮具有更强的适应性、灵活的可调节性、更好的能源节约性等优点。文章以提升室内舒适度为导向,采用案例研究的方法,总结出适用于建筑单体的动态表皮设计方法。基于建筑室内的风环境、光环境、热环境,从建筑的通风设计、采光设计、遮阳设计和蓄热设计等几个方面结合动态表皮的构件、材料及旋转方式进行研究,从宏观到微观分层次提出适用于建筑室内舒适度的动态表皮设计方法,以期为动态表皮的进一步研究提供一定参考。 展开更多
关键词 环境因素变化 室内舒适度 动态表皮设计
下载PDF
Seasonal change in body length of important small copepods and relationship with environmental factors in Jiaozhou Bay, China 被引量:2
2
作者 孙晓红 孙松 +1 位作者 李超伦 王敏晓 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2012年第3期404-409,共6页
Differences among species in prosome length and in species' response to environmental factors do exist. Therefore, it is useful to examine prosome length for different copepod species in variable environments. Sea... Differences among species in prosome length and in species' response to environmental factors do exist. Therefore, it is useful to examine prosome length for different copepod species in variable environments. Seasonal variations in prosome length of four small copepods and their copepodite stages in the Jiaozhou Bay were compared and the relative influence of temperature, salinity, and chlorophyll concentration were examined. Two peaks were found in the mean prosome length of Paracalanus parvus (in early winter and May). For Acartia bifilosa, the maximum values of all copepodites occurred mainly from February to April, and decreased to the bottom in July. Prosome length of Acartia pacifica peaked when it first appeared in June, then reached to the minimum in July. Parvocalanus crassirostris only appeared from late summer to autumn and the mean prosome length showed no clear changes. Correlations of adult prosome length with environmental factors were evaluated. For the four species, temperature was negatively correlated to prosome length except for P. crassirostris. But the different species varied markedly in their responds to temperature. A. bifilosa showed a more definite trend of size variation with temperature than P. parvus and A. pacifica. Correlations of prosome length with salinity were significantly positive for almost all the small copepods. The relationship between chlorophyll concentration and prosome length was complicated for these copepods, but for P. parvus, chlorophyll concentration was also an important affecting factor. Furthermore, investigation needs to be done on food quality for some copepod. These results are essential to estimate the biomass and the production, and to understand these small copepods' population dynamics in this human-affected bay. 展开更多
关键词 small copepod prosome length copepodites environmental factors Jiaozhou Bay
下载PDF
Distribution of Polychaete Assemblage in Relation to Natural Environmental Variation and Anthropogenic Stress 被引量:1
3
作者 ZAN Xiaoxiao ZHANG Chongliang +2 位作者 XU Binduo XUE Ying REN Yiping 《Journal of Ocean University of China》 SCIE CAS 2015年第4期749-758,共10页
Polychaete are diverse species of the soft-bottom community, and are often used as indicators in environment monitoring programs. However, the effects of anthropogenic activities and natural environmental variation on... Polychaete are diverse species of the soft-bottom community, and are often used as indicators in environment monitoring programs. However, the effects of anthropogenic activities and natural environmental variation on polychaete assemblage are rarely addressed. The goals of this study are to identify the effects of natural environmental variation and anthropogenic stress on poly- chaete assemblage, and to explore the relationship between the polychaete assemblage structure and anthropogenic stress without considering the natural environmental variation. Based on the data collected from the surveys conducted in the tidal fiat of Jiaozhou Bay, the relationship between polychaete assemblage structure and environmental variables was determined using multivariate statis- tical methods including hierarchical cluster analysis, multidimensional scaling (MDS) and canonical correspondence analysis (CCA). The results showed that the polychaete assemblage was dominated by two species, Amphictenejaponica and Heteromastusfiliformis, and could be divided into two subgroups characterized by high and low species abundance. CCA illustrated that the natural environ- mental variables including water temperature and the distance from coast had primary effects on the polychaete assemblage structure; while stress of contaminants, such as As and Hg, had the secondary influences; and stress from the aquacultured species, mainly Ruditapes philippinarum, had a limited effect. Colinearity between the natural environmental variables and anthropogenic stress variables caused a critical divergence in the interpretation of CCA results, which highlighted the risk of a lack of information in en- vironment assessment. Glycinde gurjanovae, Sternaspis scutata and Eulalia bilineata may serve as the 'contamination indicators', which need to be confirmed in future studies. 展开更多
关键词 POLYCHAETE tidal flat anthropogenic stress CONTAMINANT AQUACULTURE multivariate analysis canonical correspondenceanalysis (CCA)
下载PDF
Seasonal variation of plankton communities influenced by environmental factors in an artificial lake 被引量:3
4
作者 李学梅 余育和 +3 位作者 张堂林 冯伟松 敖鸿毅 颜庆云 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2012年第3期397-403,共7页
We evaluated the seasonal variation in plankton community composition in an artificial lake. We conducted microscopic analysis and denaturing gradient gel electrophoresis (DGGE) of PCR-amplified partial 16S rRNAand 18... We evaluated the seasonal variation in plankton community composition in an artificial lake. We conducted microscopic analysis and denaturing gradient gel electrophoresis (DGGE) of PCR-amplified partial 16S rRNAand 18S rRNAgenes to characterize the plankton community. The clustering of unweighted pair group method with arithmetic mean (UPGMA) was then used to investigate the similarity of these plankton communities. DGGE fingerprinting revealed that samples collected at the different sites within a season shared high similarity and were generally grouped together. In contrast, we did not observe any seasonal variation based on microscopic analysis. Redundancy analysis (RDA) of the plankton operational taxonomic units (OTUs) in relation to environmental factors revealed that transparency was negatively correlated with the first axis (R=-0.931), and temperature and total phosphorus (TP) were positively correlated with the first axis (R=0.736 and R=0.660, respectively). In conclusion, plankton communities in the artificial lake exhibited significant seasonal variation. Transparency, phosphorus and temperature appear to be the major factors driving the differences in plankton composition. 展开更多
关键词 plankton community PCR-DGGE redundancy analysis community diversity artificial lake
下载PDF
Seasonal Changes of Reproductive Activity and Biochemical Composition of Pen Shell Atrina pectinata Linnaeus,1767 in Bohai Sea,China 被引量:2
5
作者 WANG Changbo LI Qi +1 位作者 XU Chengxun YU Ruihai 《Journal of Ocean University of China》 SCIE CAS CSCD 2017年第3期479-489,共11页
Seasonal variations in the biochemical composition and the reproductive cycle of pen shell Atrina pectinata in Bohai Sea were investigated from May 2013 to April 2014. Histological analysis indicated that the reproduc... Seasonal variations in the biochemical composition and the reproductive cycle of pen shell Atrina pectinata in Bohai Sea were investigated from May 2013 to April 2014. Histological analysis indicated that the reproductive cycle of A. pectinata can be divided into two phases, inactive stage and gametogenesis, which were equally and significantly influenced by seawater temperature and food availability. Gametogenesis began in late autumn(October), and completed in June and July. Spawning took place in August, coinciding with the highest water temperature and the richest phytoplankton. The significantly high glycogen content in adductor muscles sustained throughout the late active and ripeness stages, but plummeted during spawning and inactive stages. The protein content in female gonads exhibited a synchronous increase along with oocyte diameter and lipid content, suggesting that the female gonads could accumulate protein and lipid for vitelline in A. pectinata. Furthermore, the RNA/DNA ratio was found to be a useful index to indicate the level of gonad maturation in both males and females. The findings of the present study provided a foundation for the fishery resource administration and the aquaculture development of this species. 展开更多
关键词 biochemical composition reproductive cycle environment factor Atrina pectinata seasonal variation
下载PDF
Seasonal dynamics of crustacean zooplankton community structure in Erhai Lake, a plateau lake, with reference to phytoplankton and environmental factors 被引量:10
6
作者 杨威 邓道贵 +1 位作者 张赛 胡翠林 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2014年第5期1074-1082,共9页
The seasonal dynamics of a crustacean zooplankton community in Erhai Lake was investigated from May 2010 to April 2011. In total, 11 species were recorded, including six(6 genera) cladoceran and five(5 genera) copepod... The seasonal dynamics of a crustacean zooplankton community in Erhai Lake was investigated from May 2010 to April 2011. In total, 11 species were recorded, including six(6 genera) cladoceran and five(5 genera) copepod species. The crustacean zooplankton densities ranged from 24.3 to 155.4 ind./L. In winter and spring, the large-bodied cladoceran Daphnia galeata dominated the crustacean plankton community. In summer and autumn, when the colonial or filamentous algae dominated the phytoplankton communities, the small-bodied species(e.g. B osmina fatalis, Ceriodaphnia quadrangular, and Mesocyclops leuckarti) replaced the large-bodied ones. One-way ANOVA and redundancy analysis revealed that community structure was dependent upon total nitrogen, total phosphorus, water temperature, transparency, and the biomass of small algae. The variation in both phytoplankton structure and environmental variables were important factors in the seasonal succession of crustacean zooplankton structure in Erhai Lake. 展开更多
关键词 Erhai Lake crustacean zooplankton community structure seasonal dynamics
下载PDF
Zooplankton community structure in relation to environmental factors and ecological assessment of water quality in the Harbin Section of the Songhua River 被引量:2
7
作者 李晓钰 于洪贤 马成学 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2014年第6期1344-1351,共8页
To study the relationship between zooplankton community structure and environmental factors and water quality in the Harbin Section of the Songhua River,investigations were carried out in June,August,and October 2011.... To study the relationship between zooplankton community structure and environmental factors and water quality in the Harbin Section of the Songhua River,investigations were carried out in June,August,and October 2011.Canonical correspondence analysis(CCA) and saprobic indices were used to process and analyze the data.Seasonal variability was identified as a significant source of variation,which explains the fluctuation in zooplankton density.In autumn,the dry season,water residence time increased and zooplankton biomass and abundance accumulated in the slow flowing waters.Zooplankton abundance increased when food conditions improved.Therefore,the total zooplankton abundance in autumn is much higher than that in spring and summer.According to the saprobic indices,all the sample sites had mesosaprobic water and water quality was worse in autumn.CCA revealed that temperature accounted for most of the spatial variation in the zooplankton community.Moreover,pH,dissolved oxygen saturation,and turbidity were important factors affecting zooplankton community distribution. 展开更多
关键词 ZOOPLANKTON canonical correspondence analysis (CCA) Saprobic index HARBIN Songhua River
下载PDF
Identifying Key Environmental Factors Influencing Spatial Variation of Water Quality in Upper Shitoukoumen Reservoir Basin in Jilin Province,China
8
作者 TANG Yanling ZHANG Guangxin +1 位作者 YANG Yuesuo GAO Yingzhi 《Chinese Geographical Science》 SCIE CSCD 2009年第4期365-374,共10页
Based on the observed data in monitored drainage areas and GIS spatial analysis tools,watershed basic database of Shitoukoumen Reservoir Basin was built.The multivariate analysis and redundancy analysis(RDA) were used... Based on the observed data in monitored drainage areas and GIS spatial analysis tools,watershed basic database of Shitoukoumen Reservoir Basin was built.The multivariate analysis and redundancy analysis(RDA) were used to analyze the spatial and temporal variations of water quality,identify the key environmental factors and their patterns influencing the spatial variation of water quality,and determine the main types and forms of the non-point source(NPS) pollutant export controlled by the key environmental factors.The results show that different patterns of environmental factors lead to great changes in water quality at spatial and seasonal scales.All selected environmental factors explain 64.5% and 68.2% of the spatial variation of water quality over dry season and rainy season,respectively,which shows clear seasonal difference.Over dry season,residential land is the most important environmental factor,which possesses 35.4% of the spatial variation,and drainage area is the second key environmental factor,which possesses 17.0% of spatial variation in the total variance.Over rainy season,slope length and drainage area are the key environmental factors,which possess 29.3% of the spatial variation together.Residential land influences nitrogen export by changing NH4+-N and particulate organic nitrogen(PON) discharge over dry season,and drainage area controls phosphorus export by regulating dissolved phosphorus(DP) drainage over dry season and phosphorus associated particulate(PAP) loss over rainy season,respectively.Although slope length is an important environmental factor,it does not influence NPS pollutant export.It is interesting that soil organic matter,as a minor environmental factor,highly determines phosphorus and nitrogen export by enhancing the DP,PAP and PON loss. 展开更多
关键词 non-point source pollution key environmental factor redundancy analysis Shitoukoumen Reservoir
下载PDF
Hormones and phenotypic plasticity: Implications for the evolution of integrated adaptive phenotypes 被引量:1
9
作者 Sean C. LEMA Jun KITANO 《Current Zoology》 SCIE CAS CSCD 2013年第4期506-525,共20页
It is generally accepted that taxa exhibit genetic variation in phenotypic plasticity, but many questions remain unan- swered about how divergent plastic responses evolve under dissimilar ecological conditions. Hormon... It is generally accepted that taxa exhibit genetic variation in phenotypic plasticity, but many questions remain unan- swered about how divergent plastic responses evolve under dissimilar ecological conditions. Hormones are signaling molecules that act as proximate mediators of phenotype expression by regulating a variety of cellular, physiological, and behavioral re- sponses. Hormones not only change cellular and physiological states but also influence gene expression directly or indirectly, thereby linking environmental conditions to phenotypic development. Studying how hormonal pathways respond to environ- mental variation and how those responses differ between individuals, populations, and species can expand our understanding of the evolution of phenotypic plasticity. Here, we explore the ways that the study of hormone signaling is providing new insights into the underlying proximate bases for individual, population or species variation in plasticity. Using several studies as exem- plars, we examine how a 'norm of reaction' approach can be used in investigations of hormone-mediated plasticity to inform the following: 1) how environmental cues affect the component hormones, receptors and enzymes that comprise any endocrine sig- naling pathway, 2) how genetic and epigenetic variation in endocrine-associated genes can generate variation in plasticity among these diverse components, and 3) how phenotypes mediated by the same hormone can be coupled and decoupled via independent plastic responses of signaling components across target tissues. Future studies that apply approaches such as reaction norms and network modeling to questions concerning how hormones link environmental stimuli to ecologically-relevant phenotypic re- sponses should help unravel how phenotypic plasticity evolves 展开更多
关键词 HORMONE ENDOCRINE Reaction norm Developmental plasticity PLEIOTROPY ECOLOGY Network
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部