Understanding the distribution,dispersal,and correlation of modern pollen with vegetation in mountainous regions is essential for establishing accurate modern analogs for fossil pollen records.This study,conducted in ...Understanding the distribution,dispersal,and correlation of modern pollen with vegetation in mountainous regions is essential for establishing accurate modern analogs for fossil pollen records.This study,conducted in Leigong Mountain on the YunnanGuizhou Plateau of southwestern China,involved the collection of 35 surface soil samples from diverse vegetation communities along an elevational gradient ranging from 1210 to 1875 meters.The results reveal a close correspondence between modern pollen assemblages and vegetation zones.Principal Component Analysis(PCA)results indicate that pollen assemblages can effectively distinguish between subtropical montane evergreen broad-leaved forest(SEBF)and subtropical montane deciduous broadleaved forest(SDBF).However,both SEBF and SDBF show significant overlap with subtropical montane evergreen-deciduous broad-leaved mixed forest(SEMF).Detrended Correspondence Analysis(DCA)results clearly distinguish the three vegetation zones,and the first axis of DCA shows a significant positive correlation with elevation(p<0.01,R=0.48).Discriminant Analysis(DA)successfully assigns 94.4%of the modern pollen samples to their respective vegetation zones.Pollen taxa such as Impatiens,Astertype,and Rosaceae exhibit significant indicative capabilities for the SEBF zone,effectively distinguishing this vegetation zone from others.Pinus and Alnus display overrepresentation in the Leigong Mountain region,while Quercus(D,deciduous-type)and Poaceae exhibit high representation in the SEBF zone.In the SEBF zone,both pollen diversity and richness are the lowest.Our study reveals the complex relationship between the richness and diversity of pollen and vegetation.The diversity and richness of tree and shrub pollen are found to be lower than those of the corresponding plants.The pollen-vegetation relationship elucidated in this study serves as a critical reference for reconstructing ancient environments from fossil pollen retrieved in this region.展开更多
The thesis summarizes the connotation of rural tourism and divides it into six types,including rural sight-seeing,rural body-building activity,rural folk culture,rural experience of farm work,rural business affairs,an...The thesis summarizes the connotation of rural tourism and divides it into six types,including rural sight-seeing,rural body-building activity,rural folk culture,rural experience of farm work,rural business affairs,and study and development.It outlines the theory of sustainable development of rural tourism and points out that what sustainable development of tourism concerns is the coordination of ecology,economy,and society centering on human and nature.On the basis of introducing the connotation of modern agriculture,it divides modern agriculture into six types,including sightseeing agriculture,leisure agriculture,green agriculture,characteristic agriculture,factory agriculture,and three-dimensional agriculture.And by concluding,it obtains the combination model of modern agriculture and rural tourism.Based on the introduction of the above related theories,the thesis discusses the interaction and integration model of the sustainable development of modern agriculture and rural tourism.It emphatically analyzes the integration model of modern agriculture and rural tourism,including pastoral agriculture tourism model(sightseeing village,leisure farm,citizen farm),and science education tourism model(agricultural science and technology education base,tourism and leisure education agricultural park,children's,agricultural education base,agricultural exposition).Based on the interaction and integration relationship between modern agriculture and rural tourism,the thesis puts forward corresponding countermeasures so as to promote their positive development and realize the maximum of ecological,social and economic benefits.展开更多
In the article, the features of using modern teaching tecnologies are investigated and results are revealed. The establishment of teacher-pupil relationships based on comfortable mutual trust and equal rights is the d...In the article, the features of using modern teaching tecnologies are investigated and results are revealed. The establishment of teacher-pupil relationships based on comfortable mutual trust and equal rights is the direct effect of proper and expedient use of innovative training technologies. Teaching technologies＇ features are explored, experiment examples are listed, and all these results are analysed in this article. In the article, modem teaching technologies＇ characteristic features are explored and the need of these features in teaching process with the teacher-pupil relationship is substantiated. Some conclusions were made to analyse all these points.展开更多
For many decades Herold Hart Crane,an American poet,who played a very important role in the development of Modern American Literature in the early decades of 20th century,had been considered as a romantic poet by many...For many decades Herold Hart Crane,an American poet,who played a very important role in the development of Modern American Literature in the early decades of 20th century,had been considered as a romantic poet by many critics for his romantic verses.His poetries are considered not only the reflection of the contemporary social phenomenon,ideology,and thoughts,rather they are prophetic.On the other hand,in the early decades of 20th century,in American society,modernism marked a simultaneous movement which tremendously affected the emergence of new values in field of politics,economy,lifestyle,literature,and literary thoughts.The influence of rapid industrializations and the First World War not only changed the philosophy of human life,but also changed the writing style of the contemporary American writers.The new crowded urban life,which is a result of rapid industrializations,and the fear of war made the human being selfish.Humans lost his romantic attitudes towards the literature.A complexity emerged.Hart Crane also could not avoid this complexity.If we study his life style,philosophy of life,and poetic diction,we will surely confine his intelligence not between romanticism and modernism separately.Rather,we can call him a Modernist Romantic poet.In short,Crane can be declared as a romantic poet of the complex genre of high modernism.展开更多
基金supported by the National Natural Science Foundation of China(grant numbers 42171157,42107475 and 41907379)College Students'Innovation and Entrepreneurship Program of Nantong University,and Foundation of Hunan Province(2023JJ40099 and 23B0678)。
文摘Understanding the distribution,dispersal,and correlation of modern pollen with vegetation in mountainous regions is essential for establishing accurate modern analogs for fossil pollen records.This study,conducted in Leigong Mountain on the YunnanGuizhou Plateau of southwestern China,involved the collection of 35 surface soil samples from diverse vegetation communities along an elevational gradient ranging from 1210 to 1875 meters.The results reveal a close correspondence between modern pollen assemblages and vegetation zones.Principal Component Analysis(PCA)results indicate that pollen assemblages can effectively distinguish between subtropical montane evergreen broad-leaved forest(SEBF)and subtropical montane deciduous broadleaved forest(SDBF).However,both SEBF and SDBF show significant overlap with subtropical montane evergreen-deciduous broad-leaved mixed forest(SEMF).Detrended Correspondence Analysis(DCA)results clearly distinguish the three vegetation zones,and the first axis of DCA shows a significant positive correlation with elevation(p<0.01,R=0.48).Discriminant Analysis(DA)successfully assigns 94.4%of the modern pollen samples to their respective vegetation zones.Pollen taxa such as Impatiens,Astertype,and Rosaceae exhibit significant indicative capabilities for the SEBF zone,effectively distinguishing this vegetation zone from others.Pinus and Alnus display overrepresentation in the Leigong Mountain region,while Quercus(D,deciduous-type)and Poaceae exhibit high representation in the SEBF zone.In the SEBF zone,both pollen diversity and richness are the lowest.Our study reveals the complex relationship between the richness and diversity of pollen and vegetation.The diversity and richness of tree and shrub pollen are found to be lower than those of the corresponding plants.The pollen-vegetation relationship elucidated in this study serves as a critical reference for reconstructing ancient environments from fossil pollen retrieved in this region.
基金Supported by Humanistic Social Science Subject of Education Department of Sichuan Province-Research on the Integration Model and Countermeasures of Modern Agriculture and Rural Tourism(IY09-42)
文摘The thesis summarizes the connotation of rural tourism and divides it into six types,including rural sight-seeing,rural body-building activity,rural folk culture,rural experience of farm work,rural business affairs,and study and development.It outlines the theory of sustainable development of rural tourism and points out that what sustainable development of tourism concerns is the coordination of ecology,economy,and society centering on human and nature.On the basis of introducing the connotation of modern agriculture,it divides modern agriculture into six types,including sightseeing agriculture,leisure agriculture,green agriculture,characteristic agriculture,factory agriculture,and three-dimensional agriculture.And by concluding,it obtains the combination model of modern agriculture and rural tourism.Based on the introduction of the above related theories,the thesis discusses the interaction and integration model of the sustainable development of modern agriculture and rural tourism.It emphatically analyzes the integration model of modern agriculture and rural tourism,including pastoral agriculture tourism model(sightseeing village,leisure farm,citizen farm),and science education tourism model(agricultural science and technology education base,tourism and leisure education agricultural park,children's,agricultural education base,agricultural exposition).Based on the interaction and integration relationship between modern agriculture and rural tourism,the thesis puts forward corresponding countermeasures so as to promote their positive development and realize the maximum of ecological,social and economic benefits.
文摘In the article, the features of using modern teaching tecnologies are investigated and results are revealed. The establishment of teacher-pupil relationships based on comfortable mutual trust and equal rights is the direct effect of proper and expedient use of innovative training technologies. Teaching technologies＇ features are explored, experiment examples are listed, and all these results are analysed in this article. In the article, modem teaching technologies＇ characteristic features are explored and the need of these features in teaching process with the teacher-pupil relationship is substantiated. Some conclusions were made to analyse all these points.
文摘For many decades Herold Hart Crane,an American poet,who played a very important role in the development of Modern American Literature in the early decades of 20th century,had been considered as a romantic poet by many critics for his romantic verses.His poetries are considered not only the reflection of the contemporary social phenomenon,ideology,and thoughts,rather they are prophetic.On the other hand,in the early decades of 20th century,in American society,modernism marked a simultaneous movement which tremendously affected the emergence of new values in field of politics,economy,lifestyle,literature,and literary thoughts.The influence of rapid industrializations and the First World War not only changed the philosophy of human life,but also changed the writing style of the contemporary American writers.The new crowded urban life,which is a result of rapid industrializations,and the fear of war made the human being selfish.Humans lost his romantic attitudes towards the literature.A complexity emerged.Hart Crane also could not avoid this complexity.If we study his life style,philosophy of life,and poetic diction,we will surely confine his intelligence not between romanticism and modernism separately.Rather,we can call him a Modernist Romantic poet.In short,Crane can be declared as a romantic poet of the complex genre of high modernism.
