检索结果-南通市图书馆

Spatially explicit reconstruction of cropland cover in Europe from AD 1800 to 2000

Science China Earth Sciences 2024年第9期67卷 2953-2971页

作者： Jun LI Yu YE Xiuqi FANG diyang zhang Zhilei WU Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China Key Laboratory of Environmental Change and Natural Disaster Ministry of EducationBeijing Normal UniversityBeijing 100875China College of Geographical Science Qinghai Normal UniversityXining 810016China

One of the challenges in global change research is the significant uncertainty in global historical land use and land cover(LUCC)datasets,which are widely used as foundational *** addition to the regional cropland area reconstructions,improving the grid allocation method is another feasible way to raise the reliability of historical LUCC *** this study,an integrated reconstruction of the national cropland areas over the past 200 years was developed for 36 European *** that,the allocation algorithm was built using physiogeographic variables and historical city sites for accounting for land suitability and cultivation preferences,***,cropland data in Europe with a spatial resolution of 5′×5′at five time sections from AD 1800 to 2000 were generated using the optimal allocation algorithm in accordance with the stages of the regional *** results were as follows:(1)The dominant factors governing the distribution of croplands in Europe vary at different agricultural stages,but the results can be merged *** suitability was more optimal for allocation during the modern agricultural stage(AD 1950 and 2000);the priority index combined with land suitability and cultivation preference was more reasonable for allocation during the traditional agricultural stage(AD 1800).The average of the allocations by priority index and the land suitability could be adopted as the allocation results during the transitional stage(AD 1850 and 1900)because the grids for absolute differences within±10 and±20 percentage points between the results obtained from the above two allocations were above 80% and 95%,respectively,which means the two allocation results could be merged.(2)Over the past 200 years,the total cropland area in Europe first increased to a peak in AD 1900 and then ***,the centre of the higher cropland fraction shifted from the western part of Europe in AD 1800 to the eastern part of the continent after AD 1950.(3)

关键词： Land use and land cover change Historical cropland Gridding allocation Europe Past 200 years

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Methodology for credibility assessment of historical global LUCC datasets

引用

Science China Earth Sciences 2020年第7期63卷 1013-1025页

作者： Xiuqi FANG Wanyi ZHAO Chengpeng zhang diyang zhang Xueqiong WEI Weili QIU Yu YE Key Laboratory of Environmental Change and Natural Disaster Ministry of EducationBeijing Normal UniversityBeijing 100875China Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China School of Geographical Sciences Nanjing University of Information Science and TechnologyNanjing 210044China

Land use-induced land cover change(LUCC)is an important anthropogenic driving force of global change that has influenced,and is still influencing,many aspects of regional and global *** historical global land use/cover datasets are essential for a better understanding of the impacts of LUCC on global ***,there are not only evident inconsistencies in current historical global land use/cover datasets,but inaccuracies in the data in these global dataset revealed by historical record-based reconstructed regional data throughout the world.A focus in historical LUCC and global change research relates to how the accuracy of historical global land cover datasets can be improved.A methodology for assessing the credibility of existing historical global land cover datasets that addresses temporal as well as spatial changes in the amount and distribution of land cover is therefore ***,the credibility of a global land cover dataset could be assessed by comparing similarities or differences in the data according to actual land cover data(the"true value").However,it is extremely difficult to obtain historical evidence for assessing the credibility of historical global land cover datasets,which cannot be verified through field sampling like contemporary global land cover *** proposed a methodological framework for assessing the credibility of global land cover *** the types and characteristics of the available evidence used for assessments,we outlined four methodological approaches:(1)accuracy assessment based on regional quantitative reconstructed land cover data,(2)rationality assessment based on regional historical facts,(3)rationality assessment based on expertise,and(4)likelihood assessment based on the consistency of multiple *** methods were illustrated through five case studies of credibility assessments of historical cropland cover *** framework can also be applied in assessments of oth

关键词： LUCC Global datasets Credibility Assessment methodology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Reconstruction of cropland area in the European part of Tsarist Russia from 1696 to 1914 based on historical documents

引用

Journal of Geographical Sciences 2020年第8期30卷 1307-1324页

作者： ZHAO Zhilong FANG Xiuqi YE Yu zhang Chengpeng zhang diyang Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China

To evaluate the climatic and ecological impacts of anthropogenic activities in global change research,it is essential to reconstruct historical land use and land cover change on regional and global *** this study,we reconstructed cropland areas for 54 provinces within the European part of Tsarist Russia(ETR)over the periods of 1696–1914 using historical data,including cropland area,population,grain consumption,and grain yield per unit *** main results are as follows.(1)Total cropland areas and fractional cropland areas of ETR for 8 time sections during 1696–1914 were reconstructed,the former increased from 31.98×104 km2 to 147.40×104 km2,and the latter increased from 7.89%to 29.20%.The per capita cropland area decreased from 0.0246 km2 to 0.0113 km2 during 1696–1914.(2)Cropland expanded from the central and southwestern ETR to the black soil region,surrounding area of the Volga River,Ukraine region,the new Russia region,the vicinity of Ural,and north Caucasus region.(3)The expansion of territory,increase and migration of population,policies related to agricultural development and foreign trade,and the impacts of climate change were the reasons for the changes in cropland within ETR from 1696 to 1914.(4)In 1914,the cropland area and fractional cropland area of each province varied from 0.16×104 km2 and 0.76%to 5.65×104 km2 and 76.68%,respectively.(5)The comparisons show that the cropland areas of ETR in this study for 1696–1914 are higher than those in the HYDE 3.2 *** main reason for this finding might be the underestimation of per capita cropland areas in the HYDE 3.2 dataset,which values remained at approximately 0.01 km2 from 1700 to 1920.

关键词： land use/cover change cropland area provincial-level reconstruction past 300 years Eastern Europe

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Molecular insights into self-incompatibility systems:From evolution to breeding

引用

Plant Communications 2024年第2期5卷 23-45页

作者： diyang zhang Yuan-Yuan Li Xuewei Zhao Cuili zhang Ding-Kun Liu Siren Lan Weilun Yin Zhong-Jian Liu Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization Fujian Agriculture and Forestry UniversityFuzhou 350002China College of Forestry Fujian Agriculture and Forestry UniversityFuzhou 350002China College of Biological Sciences and Technology Beijing Forestry UniversityBeijing 100083China

Plants have evolved diverse self-incompatibility(SI)systems for *** Darwin’s time,consid-erable progress has been made toward elucidating this unrivaled reproductive *** advances in interdisciplinary studies and applications of biotechnology have given rise to major break-throughs in understanding the molecular pathways that lead to SI,particularly the strikingly different SI mechanisms that operate in Solanaceae,Papaveraceae,Brassicaceae,and *** best-un-derstood SI systems,together with discoveries in other"nonmodel"SI taxa such as Poaceae,suggest a complex evolutionary trajectory of SI,with multiple independent origins and frequent and irreversible *** exploration of self-/nonself-discrimination signaling cascades has revealed a compre-hensive catalog of male and female identity genes and modifier factors that control *** also enable the characterization,validation,and manipulation of SI-related factors for crop improvement,helping to address the challenges associated with development of inbred ***,we review current knowledge about the evolution of SI systems,summarize key achievements in the molecular basis of pol-len‒pistil interactions,discuss potential prospects for breeding of SI crops,and raise several unresolved questions that require further investigation.

关键词： self-incompatibility S-RNase evolution genome editing crop improvement

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Comprehensive phylogenetic analyses of Orchidaceae using nuclear genes and evolutionary insights into epiphytism

引用

Journal of Integrative Plant Biology 2023年第5期65卷 1204-1225页

作者： Guojin zhang Yi Hu Ming-Zhong Huang Wei-Chang Huang Ding-Kun Liu diyang zhang Haihua Hu Jason L.Downing Zhong-Jian Liu Hong Ma Department of Biology 510 Mueller LaboratoryHuck Institutes of the Life SciencesThe Pennsylvania State UniversityUniversity ParkPennsylvania 16802USA Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture Fujian Agriculture and Forestry UniversityFuzhou 350002China Shanghai Chenshan Botanical Garden SongjiangShanghai 201602China State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of SciencesBeijing 100093China Fairchild Tropical Botanic Garden Coral GablesFlorida 33156USA

Orchidaceae(with>28,000 orchid species)are one of the two largest plant families,with economically and ecologically important species,and occupy global and diverse niches with primary distribution in *** orchids,70%grow on other plants as epiphytes;epiphytes contribute up to~50%of the plant diversity in rainforests and provide food and shelter for diverse animals and microbes,thereby contributing to the health of these *** account for over two-thirds of vascular epiphytes and provide an excellent model for studying evolution of *** phylogenetic studies of Orchidaceae and subgroups have;been crucial for understanding relationships among many orchid lineages,although some uncertainties *** example,in the largest subfamily Epidendroideae with nearly all epiphytic orchids,relationships among some tribes and many subtribes are still controversial,hampering evolutionary analyses of *** we obtained 1,450 low-copy nuclear genes from 610 orchid species,including 431 with newly generated transcriptomes,and used them for the reconstruction of robust Orchidaceae phylogenetic trees with highly supported placements of tribes and *** also provide generally wellsupported phylogenetic placements of 131 genera and 437 species that were not sampled by previous plastid and nuclear phylogenomic *** clock analyses estimated the Orchidaceae origin at~132 million years ago(Ma)and divergences of most subtribes from 52 to 29 *** reconstruction supports at least 14 parallel origins of epiphytism;one such origin was placed at the most recent common ancestor of~95%of epiphytic orchids and linked to modern *** occurrences of rapid increase in the diversification rate were detected within Epidendroideae near and after the K-Pg boundary,contributing to~80%of the Orchidaceae *** study provides a robust and the largest family-wide Orchidaceae nuclear phylogenetic tree thus far and

关键词： convergence epiphytes evolution orchids parallel rainforest phylogenomics transcriptome

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Frequent germplasm exchanges drive the high genetic diversity of Chinese-cultivated common apricot germplasm

引用

Horticulture Research 2021年第1期8卷 2881-2891页

作者： Qiuping zhang diyang zhang Kang Yu Jingjing Ji Ning Liu Yuping zhang Ming Xu Yu-Jun zhang Xiaoxue Ma Shuo Liu Wei-Hong Sun Xia Yu Wenqi Hu Si-Ren Lan Zhong-Jian Liu Weisheng Liu Liaoning Institute of Pomology Yingkou 115009China Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture Fujian Agriculture and Forestry UniversityFuzhou 350002China BGI Institute of Applied Agriculture BGI-AgroShenzhen 518210China Institute of Vegetable and Flowers Shandong Academy of Agricultural SciencesJinan 250100China Zhejiang Institute of Subtropical Crops Zhejiang Academy of Agricultural SciencesWenzhou 325005China

The genetic diversity of germplasm is critical for exploring genetic and phenotypic resources and has important implications for crop-breeding sustainability and ***,little is known about the factors that shape and maintain genetic ***,we assembled a high-quality chromosome-level reference of the Chinese common apricot‘Yinxiangbai’,and we resequenced 180 apricot accessions that cover four major ecogeographical groups in China and other accessions from occidental *** concluded that Chinese-cultivated common apricot germplasms possessed much higher genetic diversity than those cultivated in Western *** also detected seven migration events among different apricot groups,where 27%of the genome was identified as being ***,we demonstrated that these introgressed regions drove the current high level of germplasm diversity in Chinese-cultivated common apricots by introducing different genes related to distinct phenotypes from different cultivated *** results highlight the consideration that introgressed regions may provide an important reservoir of genetic resources that can be used to sustain modern breeding programs.

关键词： germplasm breeding reservoir

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chromosome-scale assembly of the Dendrobium chrysotoxum genome enhances the understanding of orchid evolution

引用

Horticulture Research 2021年第1期8卷 2684-2697页

作者： Yongxia zhang Guo-Qiang zhang diyang zhang Xue-Die Liu Xin-Yu Xu Wei-Hong Sun Xia Yu Xiaoen Zhu Zhi-Wen Wang Xiang Zhao Wen-Ying Zhong Hongfeng Chen Wei-Lun Yin Tengbo Huang Shan-Ce Niu Zhong-Jian Liu Guangdong Provincial Key Laboratory for Plant Epigenetics College of Life Sciences and OceanographyShenzhen UniversityShenzhen 518071China Laboratory for Orchid Conservation and Utilization Orchid Conservation and Research CenterThe National Orchid Conservation CenterShenzhen 518114China School of Food Science and Technology Foshan UniversityFoshan 528225China Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture Fujian Agriculture and Forestry UniversityFuzhou 350002China College of Forestry Fujian Agriculture and Forestry UniversityFuzhou 350002China PubBio-Tech Wuhan 430070China Key Laboratory of Plant Resources Conservation Sustainable Utilization South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China College of Biological Sciences and Technology Beijing Forestry UniversityBeijing 100083China College of Horticulture Hebei Agricultural UniversityBaoding 071000China

As one of the largest families of angiosperms,the Orchidaceae family is *** represents the second largest genus of the ***,an assembled high-quality genome of species in this genus is ***,we report a chromosome-scale reference genome of Dendrobium chrysotoxum,an important ornamental and medicinal orchid *** assembled genome size of *** was 1.37 Gb,with a contig N50 value of 1.54 *** the sequences,95.75%were anchored to 19 *** were 30,044 genes predicted in the *** *** whole-genome polyploidization events occurred in *** terms of the second event,whole-genome duplication(WGD)was also found to have occurred in other Orchidaceae members,which diverged mainly via gene loss immediately after the WGD event occurred;the first duplication was found to have occurred in most monocots(tau event).We identified sugar transporter(SWEET)gene family expansion,which might be related to the abundant medicinal compounds and fleshy stems of ***-box genes were identified in ***,as well as members of TPS and Hsp90 gene families,which are associated with resistance,which may contribute to the adaptive evolution of *** also investigated the interplay among carotenoid,ABA,and ethylene biosynthesis in *** to elucidate the regulatory mechanisms of the short flowering period of orchids with yellow *** reference *** genome will provide important insights for further research on medicinal active ingredients and breeding and enhances the understanding of orchid evolution.

关键词： evolution flowers breeding

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

气候变化影响区域文明发展演化的主要表现方式

引用

地球科学进展 2017年第11期32卷 1218-1225页

作者：方修琦张頔旸北京师范大学地理科学学部地理学院环境演变与自然灾害教育部重点实验室北京100875

气候变化曾经深刻地影响了人类文明的进程,是导致区域文明兴衰的基本力量之一。气候变化对社会发展影响的表现形式和最终后果既与气候变化的特点有关,也与人类社会的适应有关,是两者相互作用的产物。基于近20年来国内外气候变化与文明... 详细信息

气候变化曾经深刻地影响了人类文明的进程,是导致区域文明兴衰的基本力量之一。气候变化对社会发展影响的表现形式和最终后果既与气候变化的特点有关,也与人类社会的适应有关,是两者相互作用的产物。基于近20年来国内外气候变化与文明研究的大量实例,归纳出气候变化影响人类社会发展的5种主要表现形式:周期性循环、脉冲式变化、适应性转型、文明崩溃与衰落、迁徙与替代。以上结果有助于深化对气候变化与文明发展相互作用机制的认识,并为人类应对全球变化挑战提供宝贵的历史借鉴。

关键词：气候变化文明气候变化影响适应类型

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

SBN:60晶体的电光诱导光波导及其调制器

引用

光学学报 1987年第5期7卷 468-472页

作者：张迪扬中国科学院长春物理研究所

本文首次报道了在SBN:60(Sr0.6Ba0.4Nb2O6)单晶上观察到DC（直流）电光诱导光波导的形成,以及当反转上述DC极性时光由电极间隙下低折射率区折向衬底的现象,并根据上述现象演示了一种不同于以光相位调制为基础的新的低压高调制度的电光... 详细信息

本文首次报道了在SBN:60(Sr0.6Ba0.4Nb2O6)单晶上观察到DC（直流）电光诱导光波导的形成,以及当反转上述DC极性时光由电极间隙下低折射率区折向衬底的现象,并根据上述现象演示了一种不同于以光相位调制为基础的新的低压高调制度的电光光强调制器。

关键词：电光调制器 SBN晶体光波导

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The Melastoma dodecandrum genome and the evolution of Myrtales

引用

Journal of Genetics and Genomics 2022年第2期49卷 120-131页

作者： Yang Hao Yu-Zhen Zhou Bin Chen Gui-Zhen Chen Zhen-Ying Wen diyang zhang Wei-Hong Sun Ding-Kun Liu Jie Huang Jin-Liao Chen Xiao-Qin Zhou Wan-Lin Fan Wen-Chun zhang Lin Luo Wen-Chao Han Yan Zheng Long Li Peng-Cheng Lu Yue Xing Shu-Ya Liu Jia-Ting Sun Ying-Hui Cao Yan-Ping zhang Xiao-Ling Shi Sha-Sha Wu Ye Ai Jun-Wen Zhai Si-Ren Lan Zhong-Jian Liu Dong-Hui Peng Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture Fujian Agriculture and Forestry UniversityFuzhou 350002China Innovation and Application Engineering Technology Research Center of Ornamental Plant Germplasm Resources in Fujian Province Fuzhou 350002China

Melastomataceae has abundant morphological diversity with high economic and ornamental merit in Myrtales. The phylogenetic position of Myrtales is still contested. Here, we report the chromosome-level genome assembly of Melastoma dodecandrum in Melastomataceae. The assembled genome size is299.81 Mb with a contig N50 value of 3.00 Mb. Genome evolution analysis indicated that M. dodecandrum,Eucalyptus grandis, and Punica granatum were clustered into a clade of Myrtales and formed a sister group with the ancestor of fabids and malvids. We found that M. dodecandrum experienced four whole-genome polyploidization events: the ancient event was shared with most eudicots, one event was shared with Myrtales, and the other two events were unique to M. dodecandrum. Moreover, we identified MADS-box genes and found that the AP1-like genes expanded, and AP3-like genes might have undergone subfunctionalization. The SUAR63-like genes and AG-like genes showed different expression patterns in stamens, which may be associated with heteranthery. In addition, we found that LAZY1-like genes were involved in the negative regulation of stem branching development, which may be related to its creeping features. Our study sheds new light on the evolution of Melastomataceae and Myrtales, which provides a comprehensive genetic resource for future research.

关键词： Melastoma Genome evolution Flower development Heteranthery Flower color Creeping stem

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：