Home About Browse Search
Svenska


A multi-isotope approach to evaluate the potential of great cormorant eggs for contaminant monitoring

Jones, Douglas and Ovegård, Maria and Dahlgren, Henrik and Danielsson, Sara and Greger, Maria and Landberg, Tommy and Garbaras, Andrius and Karlson, Agnes M. L. (2022). A multi-isotope approach to evaluate the potential of great cormorant eggs for contaminant monitoring. Ecological Indicators. 136 , 108649
[Research article]

[img] PDF
2MB

Abstract

Contaminant monitoring in biota is important for determining environmental status and to detect or prioritize action on hazardous substances. Predators higher up a food chain are often used for monitoring of contaminants that bioaccumulate. However, it is not always possible to find higher predators that are both abundant and have a wide distribution for national or international contaminant monitoring. Great cormorants (Phalocrocorax carbo) are a widespread and increasingly common top predator of fish in fresh, brackish and salt water. We evaluate the suitability of great cormorant eggs as a matrix for contaminant monitoring by using stable isotopes of carbon, nitrogen and sulfur. Despite the fact that cormorants are migratory, egg isotope values showed a significant separation between five breeding colonies in Sweden (1 fresh water lake, 3 Baltic sites and 1 marine site). This high degree of separation indicates that eggs are primarily produced using local resources (not stored body resources) and that contaminants (mercury concentrations in this study) measured in eggs likely reflect levels in fish prey caught close to the breeding area. Compound specific stable isotope analysis was used to estimate cormorant trophic position (TP) and concentrations of mercury in eggs were positively related to TP. The results show that a multi-isotope approach, combined with good ecological diet knowledge allow for meaningful and comparative interpretation of mercury concentrations in biota and that great cormorant eggs appear a suitable matrix to measure locally derived and maternally transferred contaminants.

Authors/Creators:Jones, Douglas and Ovegård, Maria and Dahlgren, Henrik and Danielsson, Sara and Greger, Maria and Landberg, Tommy and Garbaras, Andrius and Karlson, Agnes M. L.
Title:A multi-isotope approach to evaluate the potential of great cormorant eggs for contaminant monitoring
Series Name/Journal:Ecological Indicators
Year of publishing :2022
Volume:136
Article number:108649
Number of Pages:8
Publisher:ELSEVIER
ISSN:1470-160X
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Sweden, Hg, Amino acid, Trophic position
URN:NBN:urn:nbn:se:slu:epsilon-p-116475
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116475
Additional ID:
Type of IDID
DOI10.1016/j.ecolind.2022.108649
Web of Science (WoS)000761380700002
ID Code:27438
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Swedish Species Information Centre
(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:25 Mar 2022 11:25
Metadata Last Modified:25 Mar 2022 11:31

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits