Document of bibliographic reference 350837

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Functional and trophic variations in macrofaunal assemblage reflect the ecological effects of bottom-based clam farming

Abstract

Understanding the ecological effects of bivalve farming on the ecosystem is needed to develop a responsible approach to marine management. The variations in the functional and trophic structure of the macrofaunal assemblage could be ideal indicators of these potential ecological effects. In this study, macrofaunal assemblage were investigated the in a bottom-based Manila clam farm located in Laizhou Bay, China before and after farming for one year, in order to identify the functional and trophic responses of the macrofauna and their feeding relationships to Manila clam farming. Stable isotope (SI) based trophic responses and trait-based functional responses of macrofauna were used to evaluate the ecological effects of the farming activity. After farming for one year, macrofaunal δ¹⁵N increased from 4.93 to 6.09‰, which was mostly caused by the presence of higher trophic-level carnivores. The standard ellipse area (SEAc) of detritivores shifted mainly through a decrease in δ¹³C range from 7.07 to 4.23‰, indicating the diet of this feeding group relied more on the biodeposits generated from farmed clams. Additionally, the diet of the carnivores after one year of clam farming mostly relied on detritivores (62.97%) rather than on farmed clams. Our study illustrated that clam farming could benefit the macrofaunal assemblage by providing biodeposits as additional food sources, consequently enhancing functional and trophic diversity. Moreover, the enhanced diversity occurred mainly in high trophic levels, leading to more complete utilization of resources. Therefore, our study suggested positive ecological effects of the bottom-based Manila clam farm on the macrofaunal assemblage after the first year of the activity.

WebOfScience code

https://www.webofscience.com/wos/woscc/full-record/WOS:000761393800006

Bibliographic citation

Sun, X.; Zhang, Y.; Filgueira, R.; Zhang, Z.; Dong, J.; Zhang, X. (2022). Functional and trophic variations in macrofaunal assemblage reflect the ecological effects of bottom-based clam farming. Ecol. Indic. 135: 108510. https://dx.doi.org/10.1016/j.ecolind.2021.108510

Topic

Marine

Is peer reviewed

true

Access rights

open access

Is accessible for free

true