Biodiv Sci ›› 2019, Vol. 27 ›› Issue (9): 984-992.DOI: 10.17520/biods.2019270

• Original Papers • Previous Articles     Next Articles

Food web characteristics of seagrass beds in intertidal of Dongying and Yantai, Shandong Province

Bo Song1,2,Linlin Chen2,Lang Yan2,Shaoyu Jiang2,Chunyun Liu2,Bingjun Li1,*,Baoquan Li2,*   

  1. 1 School of Ocean, Yantai University, Yantai, Shandong 264003
    2 Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003
  • Received:2019-09-01 Accepted:2019-09-25 Online:2019-09-20 Published:2019-09-25
  • Contact: Bingjun Li,Baoquan Li

Abstract:

To understand the nutritional relationship among benthic organisms and the food web characteristics in seagrass beds, we collected macrobenthic organisms in intertidal zones of the Yellow River Delta of Dongying and the west coast of Yantai in August 2018. We used δ 13C and δ 15N stable isotopes determine trophic position. The range of organisms isotopic values in the Dongying seagrass bed were -21.99‰ to -12.13‰ for δ 13C and 5.23‰ to 11.05‰ for δ 15N; and -18.11‰ to -14.06‰ (δ 13C) and 6.60‰ to 10.22‰ (δ 15N) in the Yantai seagrass bed. In the Dongying seagrass bed, the trophic level of main organisms ranged from 2.00 to 3.85, while in the Yantai seagrass bed the trophic range was from 2.00 to 3.15. According to δ 15N value calculations, we found that the primary consumers in these two area’s seagrass bed were filter feeding bivalves and polychaetes; the secondary consumers were plant-eating or omnivorous crustaceans, carnivorous fish and gastropods. Compared to offshore habitats, the average trophic position of macrobenthic organisms in seagrass beds was relatively low.

Key words: stable isotope, seagrass bed, food web, trophic level, macrobenthos