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新媒体冲击下的都市报:困境与出路——以施拉姆的受众媒介选择公式为分析视角 被引量:3
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作者 王勇 高利珍 《文化与传播》 2014年第3期46-51,共6页
曾经辉煌一时的都市报正受到新媒体前所未有的冲击,都市报的命运何去何从,是当前业界和学界不能不关注的问题。运用施拉姆的受众媒介选择公式进行分析发现,都市报在20世纪90年代的崛起主要是因为它满足了市民当时尚未满足的社会新闻、... 曾经辉煌一时的都市报正受到新媒体前所未有的冲击,都市报的命运何去何从,是当前业界和学界不能不关注的问题。运用施拉姆的受众媒介选择公式进行分析发现,都市报在20世纪90年代的崛起主要是因为它满足了市民当时尚未满足的社会新闻、体育娱乐新闻、舆论监督和服务资讯等方面的信息需求;当前都市报受到新媒体的冲击,是因为新媒体在对受众需求的满足上替代了都市报,同时比都市报更方便更优惠。正因为如此,都市报只有在传播渠道上实行"三栖化"和在传播内容上实行差异化,才有较大的生存发展空间。 展开更多
关键词 新媒体 都市报 媒介选择 “三栖化” 差异
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Impact of marsh changes on breeding cranes in Sanjiang Plain,northeastern China 被引量:1
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作者 江红星 钱法文 +5 位作者 刘春悦 李晓民 侯韵秋 张国钢 戴铭 刘冬平 《Chinese Birds》 2012年第3期165-179,共15页
In order to measure the impact of changes in the marsh on breeding Red-crowned Cranes (Grus japonensis) and White-naped Cranes (G.vipio) in the Sanjiang Plain,we conducted a complete crane súrvey in each of the s... In order to measure the impact of changes in the marsh on breeding Red-crowned Cranes (Grus japonensis) and White-naped Cranes (G.vipio) in the Sanjiang Plain,we conducted a complete crane súrvey in each of the summers of 2007 and 2008,and obtained information on the changes in its marsh through interpretation of satellite images in 1986,1995,2000 and 2005.A comparison between the 1984 and 2008 census shows that:1) the number of Red-crowned Cranes remained stable at about 300 birds,while the number of White-naped Cranes increased markedly; 2) the estimates of nests of Red-crowned cranes are close to the numbers of 1984,while approximately 90% of the nests of these two crane species were distributed over five national nature reserves (NNRs); 3) the two crane species became more concentrated in three regions,i.e.,the Fuyuan Delta,the middle reaches of the Naoli and Qixing rivers,and the Xingkai Lake wetlands,rather as formerly in six regions.The area of the marsh decreased by 45% within the 20-year period from 1986 to 2005.The major loss of the marsh area was in the form of a conversion to paddy fields and dry land,which can be primarily attributed to direct human activity under various economic and policy drivers.The disappearance of cranes in the Dulu and Abuqin rivers was induced by large-scale agricultural development.The fragmentation into and isolation of small areas of the marsh became increasingly more serious,which resulted in unsuitable condtions for crane breeding in small patches of the marsh.The number of cranes declined from 1984-1995 but had recovered remarkably by 2008,which may be due to theestablishment of a system of nature reserves,in place since 2000.The land ownership of the reserve plays a key role in maintaining the integrity of the wetland ecosystem,especially in Sanjiang,Honghe,Naolihe and Qixinghe NNRs,which together accommodated approximately 80% of the population of cranes.However,we did not discover any nests at all in the provincial and municipal reserves,which may be attributed to high human disturbances in these areas.In the end,we propose some recommendations on reserve management. 展开更多
关键词 Red-crowned Crane White-naped Crane BREEDING population size marsh change habitat loss Sanjiang Plain
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Diagnostic model construction and example analysis of habitat degradation in enclosed bay: II. spatiotemporal variations in habitat degradation in Sansha Bay 被引量:2
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作者 于格 孙芃 +3 位作者 刘光兴 徐东晖 丁光茂 黄东仁 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2014年第3期636-644,共9页
The process of habitat degradation varies in habitat type and driving force which shows certain spatial and temporal heterogeneity on regional scales. In the present study, a new diagnostic model for enclosed bay habi... The process of habitat degradation varies in habitat type and driving force which shows certain spatial and temporal heterogeneity on regional scales. In the present study, a new diagnostic model for enclosed bay habitat degradation was established, with which the spatial and temporal variation patterns of habitat degradation during 1991–2012 in Sansha Bay, Fujian, China was investigated. The results show that anthropogenic disturbance is the major controlling factor for the habitat degradation in large temporal heterogeneity in the bay. On the other hand, the habitat degradation experienced signifi cant spatial variations among six sub-bays. Under the joint action of temporal and spatial heterogeneity, the degradation trend in growing scale shows a more signifi cant correlation with the distribution of local leading industries along shorelines. Therefore, we quantifi ed the main characters of habitat degradation in Sansha Bay, and have understood the relationship between the status of habitats spatio-temporal variation value and the main controlling factor leading to the changes. However, a defi ciency of this research is the lack of or inaccessible to the detailed data, which shall be better solved in the future study for accessing more data from more sources. 展开更多
关键词 enclosed bay habitat degradation diagnostic analysis Sansha Bay spatiotemporal variations
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