A quantitative analysis linking seabird mortality and marine debris ingestion

Procellariiformes are the most threatened bird group globally, and the group with the highest frequency of marine debris ingestion. Marine debris ingestion is a globally recognized threat to marine biodiversity, yet the relationship between how much debris a bird ingests and mortality remains poorly...

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Bibliographic Details
Published in:Scientific reports 2019-03, Vol.9 (1), p.3202, Article 3202
Main Authors: Roman, Lauren, Hardesty, Britta Denise, Hindell, Mark A., Wilcox, Chris
Format: Article
Language:English
Subjects:
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Aquatic birds
Balloons
Biodiversity
Death
Endangered & extinct species
Humanities and Social Sciences
Ingestion
Intestine
Marine debris
Mortality
multidisciplinary
Quantitative analysis
Science
Science (multidisciplinary)
Threatened species
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Summary:Procellariiformes are the most threatened bird group globally, and the group with the highest frequency of marine debris ingestion. Marine debris ingestion is a globally recognized threat to marine biodiversity, yet the relationship between how much debris a bird ingests and mortality remains poorly understood. Using cause of death data from 1733 seabirds of 51 species, we demonstrate a significant relationship between ingested debris and a debris-ingestion cause of death (dose-response). There is a 20.4% chance of lifetime mortality from ingesting a single debris item, rising to 100% after consuming 93 items. Obstruction of the gastro-intestinal tract is the leading cause of death. Overall, balloons are the highest-risk debris item; 32 times more likely to result in death than ingesting hard plastic. These findings have significant implications for quantifying seabird mortality due to debris ingestion, and provide identifiable policy targets aimed to reduce mortality for threatened species worldwide.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-36585-9