Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》
Abstract：随着媒体融合上升为国家战略,媒体融合再度掀起研究热潮。本文通过梳理从媒介融合到媒体融合的认知演进,重点对媒体融合进行了概念探源,并对媒介融合与媒体融合进行了概念辨析,以为媒体融合研究向纵深推进提供基础理论支撑。
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： One of the burning questions of food security in current China is how to produce sufficient forage products and animal feeds. The limited arable land has to be devoted to cereal production, and exploring more terrestrial land is a prerequisite for the sustainable forage production and the development of grass-based livestock husbandry. Bohai rim is consist of coastal line of the North China Plain, which has a significant amount of medium-low yielding fields and unutilized saline-alkali land as well as intensive livestock production. In this study, a new concept of “Coastal Grass Belt”, proposed by LI Zhensheng, an academician of Chinese Academy of Sciences (CAS), was introduced, which addresses how to develop grass/forage farming system according to the severity of salinity. This concept can not only improve soil quality but also provide sufficient forage for livestock. Meanwhile, the concept is also aligned with China’s national strategies of storing grain in land and in agricultural technology to ensure the self-sufficiency of important agricultural products and the integration of the security of land and marine ecosystems. This paper provides a detailed description of the “Coastal Grass Belt” concept, elaborates its goals, key scientific issues and innovative modes, and analyzes the ecological environmental and economic-industrial benefits. Finally, the much-needed innovation platforms, agro-industry modes and policies for the development of “Coastal Grass Belt” are discussed.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： Desert Ecosystem Research Network in China now is consist of 26 national ecological stations, the network layout covers the eight major deserts, the four major sandy lands, the alpine region of the Qinghai-Tibet Plateau, and the karst and other special environments, and undertakes the tasks of positioning observation, monitoring and evaluation, scientific research, demonstration services and base construction of desert ecosystems in China by more than 20 years’ establishment. Relying on the network of ecological stations, large desert and Gobi comprehensive scientific investigations are organized to fill the final blank of desert scientific research in China; the Chinese scheme of comprehensive desertification control is explored, the classical models of the four typical regions are integrated, and industry and discipline standards are formulated. In the new era, the network of desert ecological stations should be based on the advantages of the industry, strengthen the network-connected cooperation, optimize the layout of the network, improve observation technology, expand the scale of research, face the major strategic needs of the country, serve regional social and economic development, answer social and scientific concerns, and provide all-round scientific and technological support for the achievement of the 2030 sustainable development goals.
Subjects: Biology >> Botany submitted time 2022-12-20 Cooperative journals: 《干旱区研究》
Abstract：
: β diversity reflects the different composition of species between communities and is prevalent topic in ecological research. Based on the community survey sites in Beishan and Manongshan areas of Dunhuang of Bray-Curtis index of 79 plants, this study analyzed the relationship between community and climatic factors, soil factors and geographical distance. The results showed a geographical decay pattern of plant communities in the Beishan and Manongshan areas of Dunhuang, and the β diversity was dominated by βsim. The β diversity and its turnover components were significantly affected by climate, soil, and geographical distance. Multiple regression analysis (MRM) showed that climate, and soil factors and geographical distance affected β diversity and its turnover components differently, and the effects of climate and soil factors were more important than the geographical distance. These results indicated that β diversity of plant community species in the Beishan and Manongshan areas of Dunhuang resulted from habitat filtration and dispersal restriction. Species composition of communities differed greatly, and habitat filtration accounted for a large proportion of species turnover
Hits
Hits
Downloads
Comment
YES