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大连沿海太平洋牡蛎大量死亡原因解析 被引量:16
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作者 隋锡林 孙景伟 +6 位作者 王富贵 王军 王鉴 胡庆明 薛克 王笑月 王志松 《大连水产学院学报》 CSCD 北大核心 2002年第4期272-278,共7页
对大连沿海牡蛎主养区发生的太平洋牡蛎Crassostreagigas大量死亡的原因进行了调查研究与分析,发现其大量死亡的主要原因是:单一养殖品种养殖密度过大,超负荷养殖;养殖区水环境恶化,生态平衡被破坏;繁殖季节养殖对象生理活性降低,呈现... 对大连沿海牡蛎主养区发生的太平洋牡蛎Crassostreagigas大量死亡的原因进行了调查研究与分析,发现其大量死亡的主要原因是:单一养殖品种养殖密度过大,超负荷养殖;养殖区水环境恶化,生态平衡被破坏;繁殖季节养殖对象生理活性降低,呈现繁殖生理障碍;附着生物特别是真枝螅在鳃上的大量寄生;养殖工艺及作业方式不完善等。 展开更多
关键词 太平洋牡蛎 死亡原因 大连沿海地区 养殖密度 水质 附着生物 养殖工艺
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Spatio-temporal Differentiation of Residential Land for Coastal Town: A Case Study of Dalian Jinshitan 被引量:3
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作者 YANG Jun SUN Jing +2 位作者 ZHAO Hongdan XI Jianchao LI Xueming 《Chinese Geographical Science》 SCIE CSCD 2016年第4期566-576,共11页
Based on SPOT5 satellite remote sensing images and land use data in five time phases covering the period 1988–2012, the distribution characteristics, spatial differentiation processes, and driving mechanisms affectin... Based on SPOT5 satellite remote sensing images and land use data in five time phases covering the period 1988–2012, the distribution characteristics, spatial differentiation processes, and driving mechanisms affecting the residential land of the Jinshitan Tourist Resort were studied. The work included a combination of GIS technology, adoption of the differentiation index D, and the multi-group differentiation-measure model D(m). The results provided a basis for the following conclusions: 1) From 1988 to 2012, the degree of differentiation of the rural residential land first decreased, and then increased. The general residential, commercial residential and garden-house land-types all showed declining trends, of which the garden-house type presented the most intense volatility. 2) The overall background of the traditional residential land type was gradually replaced by a new residential land type, and the total area of residential land increased year by year, significantly improving the overall residential conditions. The areas of the new residential land type showed growth, and were increasingly widely distributed in the coastal tourist resorts, transportation corridors, and scenic areas. 3) Government policy, social differentiation, market mechanisms, and individual choices(along with other factors) were mutually promoted, although still restrained. However, all of these factors interacted to constrain the developmental direction and the processes affecting tourism real estate in the Dalian Jinshitan Tourist Resort. 展开更多
关键词 residential space differentiation differentiation degree residential conditions driving mechanism Dalian Jinshitan
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