2013 Fiscal Year Final Research Report

Distribution structure and conservation of aquatic plants in irrigation ponds

Research Project

Project/Area Number	24780236
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Irrigation, drainage and rural engineering/Rural planning
Research Institution	Hiroshima University
Principal Investigator	WATANABE Sonoko 広島大学, 国際協力研究科, 特任講師 (80403616)
Project Period (FY)	2012-04-01 – 2014-03-31
Keywords	分布構造 / 生物多様性保全 / 空間統計学 / 水生植物 / 農業生態系
Research Abstract	This study aimed to clear the distribution structure and ecological characteristics of irrigation ponds in Saijyo Basin, Higashi-Hiroshima by using analysis of spatial statistics and predictive habitat models. The study cleared 1) four irrigation pond type (A~D) were recognized, 2) All the irrigation pond groups, except C, types were significantly aggregated within a 0.5-km radius, 3) Group C was aggregated, but did not show a distinct peak, 4) For the distribution correlation, groups A and C and C and D were significantly aggregated. Other irrigation pond groups were distributed independently. These results suggest that the spatial aggregation of species can be indicative of a positive interaction among them. Furthermore, we suggest that the spatial scale at which conservation methods are applied should be taken into account, and emphasize the need to consider spatial issues when developing strategies for pond conservation.

(1 results)