The ecological preferences of living benthic foraminifera from the riverine influx dominated eastern continental margin of India have been studied. The living benthic foraminifera were abundant on the upper slope (~100–700 m). Three distinct species assemblages were identified. Assemblage 1 (Ammonia beccari, Pseudononion costiferum, Hanzawaia nipponica, Bolivina frondalis, Bolivina dilatata, Bolivina striatula, Asterorotalia milletti) representing warmer, well-oxygenated water and coarse substrate with low organic carbon is restricted to the inner shelf. Assemblage 2 includes species (Verneuilinulla propinqua, Ammodiscus incertus, Buliminella dubia, Rotaliatinopsis semiinvoluta, Bolivina lowmani, Fursenkoina spinosa) thriving in the regions with abundant food availability and low oxygen concentration on the continental slope. The species in Assemblage 3 (Globocassidulina subglobosa, Epistominella exigua, Gyroidinoides subzelandica, Reophax longicollis, Adercotryma glomeratum, Cystammina pauciloculata, Spiroplectammina biformis) prefer deeper waters with moderate organic carbon and dissolved oxygen. The information of the ecological niches of benthic foraminifera will help in environmental impact assessment and paleoecological studies.

研究了以河流流入为主的印度东部大陆边缘的生活底栖有孔虫的生态偏好。上坡（~100-700 m）有丰富的底栖有孔虫。确定了三个不同的物种组合。组合 1（Ammonia beccari 、Pseudononion costiferum、Hanzawaia nipponica、Bolivina frondalis、Bolivina dilatata、Bolivina striatula、Asterorotalia milletti）代表温暖、氧化良好的水和低有机碳的粗基质，仅限于内陆架。组合 2 包括物种 ( Verneuilinulla propinqua ,Ammodiscus incertus、Buliminella dubia、Rotaliatinopsis semiinvoluta、Bolivina lowmani、Fursenkoina spinosa）在大陆坡上食物供应充足和氧气浓度低的地区茁壮成长。组合 3 中的物种 ( Globocassidulina subglobosa , Epistominella exigua , Gyroidinoides subzelandica , Reophax longicollis , Adercotryma glomeratum , Cystammina pauciloculata , Spiroplectammina biformis) 更喜欢有机碳和溶解氧适中的较深水域。底栖有孔虫的生态位信息将有助于环境影响评估和古生态研究。