Interdependence between Natural Habitats and Ricefields for Rice Pest Management in the Agusan Marsh Floodplain  

作　　者：Rowena P. Varela Victor P. Gapud 

机构地区：[1]Department of Agricultural Sciences, Caraga State University Ampayon, Butuan City 8600, Philippines [2]Department of Entomology, University of the Philippines Los Banos College, Laguna 4032, Philippines

出　　处：《Journal of Environmental Science and Engineering(A)》2013年第3期155-161,共7页环境科学与工程（A）

摘　　要：This paper describes how aquatic insect diversity in major natural habitats of Agusan marsh relates with nearby ricefields to determine the interdependence between them for sustainable rice production through natural pest control and for conservation of aquatic fauna in the marsh. Sampling for one year including two cropping seasons of rice production was conducted in various natural habitats of the marsh and in the adjoining rice fields. Both the natural habitats and rice fields were characterized in relation to determining habitat suitability for aquatic insects. The sedge-dominated swamp had the highest diversity among the natural habitats, while the fern-dominated swamp had the lowest. In the adjacent ricefields, diversity was similarly highest in the site near the sedge-dominated swamp, while the lowest was in the ricefields adjoining the Sago forest. Species composition of aquatic insects among the habitats differed between the wet and dry seasons. However, similarity patterns exist between natural habitats and rice fields. The closer similarity in species composition between natural habitats and ricefields indicates habitat connectivity which is an important consideration in planning and effective pest management and ecologically sound rice farming in the marsh.

关 键 词：Ricefields aquatic biodiversity alternative habitat pest management. 

分 类 号：S511[农业科学—作物学] Q959.848[生物学—动物学]