Upper trophic structure in the Atlantic Patagonian shelf break as inferred from stable isotope analysis

Guoping ZHU; Haiting ZHANG; Yang YANG; Shaoqin WANG; Lian WEI; Qingyuan YANG

doi:10.1007/s00343-018-6340-5

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Upper trophic structure in the Atlantic Patagonian shelf break as inferred from stable isotope analysis

Chemistry | Updated：2023-05-19

- Upper trophic structure in the Atlantic Patagonian shelf break as inferred from stable isotope analysis
- Chinese Journal of Oceanology and Limnology Vol. 36, Issue 3, Pages: 717-725(2018)
- Affiliations：
  
  1.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
  2.National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China
  3.Polar Marine Ecosystem Group, Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Ministry of Education, Shanghai 201306, China
- Author bio：
  
  ZHU Guoping, gpzhu@shou.edu.cn
- Funds：
- DOI：10.1007/s00343-018-6340-5
  CLC：
- Received：04 January 2017，
  
  Accepted：12 April 2017，
  
  Online First：17 May 2017，
  
  Published：2018-05
- Accepted：
Scan QR Code
Guoping ZHU, Haiting ZHANG, Yang YANG, et al. Upper trophic structure in the Atlantic Patagonian shelf break as inferred from stable isotope analysis[J]. Chinese Journal of Oceanology and Limnology, 2018, 36(3): 717-725.
DOI：

Guoping ZHU, Haiting ZHANG, Yang YANG, et al. Upper trophic structure in the Atlantic Patagonian shelf break as inferred from stable isotope analysis[J]. Chinese Journal of Oceanology and Limnology, 2018, 36(3): 717-725. DOI： 10.1007/s00343-018-6340-5.

摘要

Abstract

The Patagonian Shelf is a very productive region with different ecosystem structures. A long history of fishing in the Southwestern Atlantic Ocean combined with a complex hydrographic structure

with a permanent front over the shelf-break and different coastal frontal regions

and a wide non-frontal area in between have made the food web in this area more complex and have resulted in changes to the spatialtemporal scale. Stable isotopes of carbon and nitrogen were used to determine the trophic structure of the Patagonian shelf break which was previously poorly understood. The results indicated that the average δ

N value of pelagic guild (

Illex argentinus

) was remarkable lower than those of the other guilds. The δ

C values of almost all species ranged from -17‰ to -18‰

but

Stromateus brasiliensis

had a significant lower δ

C value. Compared with the southern Patagonian shelf

short food chain length also occurred. The impact of complex oceanographic structures has resulted in food web structure change to the temporal-spatial scale on the Patagonian shelf. The Patagonian shelf break can be considered as a separated ecosystem structure with lower δ

N values.

关键词

Keywords

references

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