Trophic structure and energy flow of the resettled maritime area of the Bay of Bengal, Bangladesh through ECOPATH  

作　　者：Ehsanul Karim Qun Liu Ying Xue Shanur Jahedul Hasan M Enamul Hoq Yahia Mahmud 

机构地区：[1]College of Fisheries,Ocean University of China,Qingdao 266003,China [2]Bangladesh Fisheries Research Institute(BFRI),Mymensingh-2201,Bangladesh

出　　处：《Acta Oceanologica Sinica》2019年第10期27-42,共16页海洋学报（英文版）

基　　金：The Fundamental Research Funds for the Central Universities of China under contract No.201562030

摘　　要：The existing study was taken to represent the current information in order to develop a mass-balanced ecosystem model within the resettled maritime boundary area of the Bay of Bengal(BoB),Bangladesh from July 2016 to June 2017 through ECOPATH approach covering over 90 000 km2.A total of 19 functional groups were considered representing all trophic levels in the foodweb where estimated trophic interactions between the groups were varied from 1(primary producers and detritus)to 3.45(sharks).The ecotrophic efficiency(EE)of most of the consumers was greater than 0.80;symbolizing a largely exploited ecosystem and high energy transfer from lower to higher trophic levels.Moreover,the gross efficiency(0.001 8)and transfer efficiency(11.12%)of the whole system symbolizes the“Developing Systems”with somewhat maturity currently.Ecosystem’s overhead(64.6)and ascendancy(35.4)also designate the ecosystem’s stability.Thus,this study determines that the resettled maritime area of BoB reserves significant backup strength to face stress situations having capacity to rapid restoration to the original states.The existing study was taken to represent the current information in order to develop a mass-balanced ecosystem model within the resettled maritime boundary area of the Bay of Bengal(BoB), Bangladesh from July 2016 to June2017 through ECOPATH approach covering over 90 000 km2. A total of 19 functional groups were considered representing all trophic levels in the foodweb where estimated trophic interactions between the groups were varied from 1(primary producers and detritus) to 3.45(sharks). The ecotrophic efficiency(EE) of most of the consumers was greater than 0.80; symbolizing a largely exploited ecosystem and high energy transfer from lower to higher trophic levels. Moreover, the gross efficiency(0.001 8) and transfer efficiency(11.12%) of the whole system symbolizes the "Developing Systems" with somewhat maturity currently. Ecosystem’s overhead(64.6) and ascendancy(35.4) also designate the ecosystem’s stability. Thus, this study determines that the resettled maritime area of BoB reserves significant backup strength to face stress situations having capacity to rapid restoration to the original states.

关 键 词：ECOPATH with ECOSIM Bay of BENGAL ecological groups MARITIME ECOSYSTEM mass balance 

分 类 号：F42[经济管理—产业经济]