Seabirds Under Pressure: Revealing the Effects of Mercury Exposure

Informazioni relative al progetto

SUPREME

ID dell’accordo di sovvenzione: 886005

DOI

10.3030/886005

Progetto chiuso

Data della firma CE 17 Aprile 2020

Data di avvio 1 Febbraio 2021

Data di completamento 31 Gennaio 2023

Finanziato da

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Costo totale

€ 196 707,84

Contributo UE

€ 196 707,84

Coordinato da

MUSEUM NATIONAL D'HISTOIRE NATURELLE
France

Periodic Reporting for period 1 - SUPREME (Seabirds Under Pressure: Revealing the Effects of Mercury Exposure)

Periodo di rendicontazione: 2021-02-01 al 2023-01-31

Sintesi del contesto e degli obiettivi generali del progetto

Mercury is one of the most toxic chemicals for humans and animals. Although efforts have been made in previous years to reduce global mercury emissions, in some countries it remains nevertheless released in large quantities into the atmosphere (e.g. through coal-fueled power plants). In some South American countries, mercury is used extensively in illegal gold mining, poisoning local fish and other animals, and consequently also humans. Although the phenomenon is well known, there are few studies showing the deleterious effects of mercury on human health and on the animals that inhabit these areas. Our aim is to demonstrate that the local fauna suffers from the presence of this contaminant in the environment. To do this, we studied a local seabird population (Magnificent frigatebird), which has been suffering from a viral disease causing episodes of massive mortality of hatchlings for several years. The results of our study are of fundamental importance as they can serve the institutions to implement laws regulating the release of mercury into the environment, and to tighten penalties for those who do not meet these standards. Besides having a great impact on the conservation of local fauna, our project results can have a highly beneficial effect on society and on improving the lives of local indigenous peoples.

Lavoro eseguito dall’inizio del progetto fino alla fine del periodo coperto dalla relazione e principali risultati finora ottenuti

Through this project, we have established the basis for demonstrating that the occurrence of disease in these seabirds is due to the presence of various sources of environmental stress. We have shown that hatchlings become ill because they suffer from malnutrition. We have shown that hatchlings also have high levels of mercury in their tissues, and that the combination of the presence of (highly toxic) mercury with malnutrition is the trigger of the disease.

Progressi oltre lo stato dell’arte e potenziale impatto previsto (incluso l’impatto socioeconomico e le implicazioni sociali più ampie del progetto fino ad ora)

The project is not yet finished. Unfortunately, due to the delays caused by the impact of COVID-19 in our everyday lives, some of the project's results and objectives are still to be finalised. However, thanks to the results obtained so far, we were able to plan the next steps of our research. The project will continue for another three years thanks to the collaborations that have arisen between the different research organisations that have participated in this project. For example, we have equipped some adult birds with GPS devices that will enable us to monitor the behaviour of adults during the chicks' rearing period, and understand whether mercury exposure may affect their optimal behaviour (the one which maximises both the survival and fitness).

Female frigatebird equipped with a GPS unit

Frigatebird chick infected with the disease