運河域の干潟上に造成したタイドプールの生物生息効果 (original) (raw)
運河域の干潟上に造成したタイドプールの生物生息効果
2013, Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
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1 NIPPON KOEI Co., Ltd a 6293@n−koei.co.jp 2 Fac. of Envi. and Info. Scie., Yokohama National Univ. 4 9 6 2 1 m 2 2 HAYASAKA, Daisuke and FUJIWARA, Kazue: Human activities and environmental factors determining vegetation composition on the dry coastal sand dunes along the Shonan Coast, Kanagawa Prefecture Abstract In order to work out the basic data for future coastal management and coastal sand−dune vegetation conservation, vegetation patterns on dry coastal sand dunes along the Shonan Coast of Kanagawa Prefecture were investigated phytosociologically and relationships to environmental factors were analyzed. In this study, coastal vegetation was classified into four classes, nine associations and six communities including two communities unknown in the higher units. Results from principal components analysis showed that vegetation habitats clearly differed in soil nutrients, other soil properties, frequency of cleaning and number of visitors. Salsoletea komarovii, Glehnietea littoralis and Viticetea rotundifoliae appear under low soil nitrogen content and anthropogenic disturbances, and Plantaginetea maioris and communities unknown in the higher units occur on soils with high content of fine gravel and high nitrogen content. Communities of Cynodon dactylon and Oenothera laciniata occurred widely on the Shonan Coast, but their habitats differ from each other. These results could be found on coastal sand dunes under strong human activity elsewhere in Japan. Based on these results, strict limitation to human activity on sand dunes is recommended for conservation of coastal vegetation. As all vegetation types of Shonan Coast were found in Hiratsuka City and Oiso Town, coastal vegetation in these two areas should be conserved carefully (strictly).
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：There is a growing attention to the concept of the coupled social-ecological system (SES) where human and biophysical systems are intricately linked. This recognition calls for a more integrated approach for the sustainable use and conservation of ecosystems and biodiversity. In this paper, we identified hotspot of social-ecological production landscapes (SEPLs) of the Noto Peninsula, Ishikawa, where both human-perceived social and physically measured ecological values overlap. Questionnaire survey was conducted targeting at residents of and (potential) visitors to the Noto Peninsula to explore human-perceived landscape values of the study area. The result of questionnaire survey was geo-referenced to develop value surfaces of twelve landscape values with a Geographic Information System (GIS). In addition, the ecological value map was developed employing Satoyama Index as an indicator for agricultural landscape heterogeneity, which was then overlaid with the maps of landscape values to identify spatial distribution of hotspots of social-ecological production landscapes. Our analysis identified that hotspots existed across the study area, especially in coastal plains of suburban areas where diverse land use with multiple landscape values were observed. We concluded the paper by discussing the limitations and potential managerial implications of hotspots mapping of social-ecological production landscapes for sustainable landscape management.
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