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EFFECTS OF CLIMATE CHANGE ON AGROECOLOGICAL SYSTEMS IN THE YANGTZE DELTA Diversity of Aquatic Vascular Plants in the Yangtze Delta Analysis method and case study on interzone spatial transfer of agricultural system production disposition in farming region Landscape structure, management and soil organic carbon in the densely populated village landscapes of China‘s Yangtze Delta Plain Paleovegetation and paleoclimate fluctuations in Qingpu Area,Shanghai since 8.5 ka B.P. CH4 emission features of leading super-rice varieties and their relationships with the varieties growth characteristics in Yangtze Delta of China.