Effects of increasing temperatures on biomarker responses and accumulation of hazardous substances in rope mussels (Mytilus galloprovincialis) from Bizerte lagoon
Identifieur interne : 000267 ( Main/Exploration ); précédent : 000266; suivant : 000268Effects of increasing temperatures on biomarker responses and accumulation of hazardous substances in rope mussels (Mytilus galloprovincialis) from Bizerte lagoon
Auteurs : Naouel Kamel [Tunisie] ; Thierry Burgeot [France] ; Mohamed Banni [Tunisie] ; Mohamed Chalghaf [Tunisie] ; Simon Devin [France] ; Christophe Minier [France] ; Hamadi Boussetta [Tunisie]Source :
- Environmental Science and Pollution Research [ 0944-1344 ] ; 2014-05-01.
English descriptors
Abstract
This study examined the influence of increasing temperatures in spring and summer on biochemical biomarkers in Mytilus galloprovincialis mussels sampled from Bizerte lagoon (northern Tunisia). Spatial and seasonal variations in a battery of seven biomarkers were analyzed in relation to environmental parameters (temperature, salinity, and pH), physiological status (condition and gonad indexes), stress on stress (SoS), and chemical contaminant levels (heavy metals, polycyclic aromatic hydrocarbons (PAHs), and PCBs) in digestive glands. Integrated biological response (IBR) was calculated using seven biomarkers (acetylcholinesterase (AChE), benzo[a]pyrene hydroxylase (BPH), multixenobiotic resistance (MXR), glutathione S-transferase (GST), catalase (CAT), malondialdehyde (MDA), and metallothioneins (MT). Seasonal variations in biological response were determined during a critical period between spring and summer at two sites, where chemical contamination varies by a factor of 2 for heavy metals and a factor 2.5 for PAHs. The analysis of a battery of biomarkers was combined with the measurement of physiological parameters at both sites, in order to quantify a maximum range of metabolic regulation with a temperature increase of 11 A degrees C between May and August. According to our results, the MT, MDA, CAT, and AChE biomarkers showed the highest amplitude during the 11 A degrees C rise, while the BPH, GST, and MXR biomarkers showed the lowest amplitude. Metabolic amplitude measured with the IBR at Menzel Abdelrahmen-the most severely contaminated station-revealed the highest metabolic stress in Bizerte lagoon in August, when temperatures were highest 29.1 A degrees C. This high metabolic rate was quantified for each biomarker in the North African lagoon area and confirmed in August, when the highest IBR index values were obtained at the least contaminated site 2 (IBR = 9.6) and the most contaminated site 1 (IBR = 19.6). The combined effects of chemical contamination and increased salinity and temperatures in summer appear to induce a highest metabolic adaptation response and can therefore be used to determine thresholds of effectiveness and facilitate the interpretation of monitoring biomarkers. This approach, applied during substantial temperature increases at two sites with differing chemical contamination, is a first step toward determining an environmental assessment criteria (EAC) threshold in a North African lagoon.
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DOI: 10.1007/s11356-014-2540-5
Affiliations:
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type="datePub">2014-05-01</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>Biomarkers</term><term>Integrated biomarker response</term><term>Lagoon biomonitoring</term><term>Mussels</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This study examined the influence of increasing temperatures in spring and summer on biochemical biomarkers in Mytilus galloprovincialis mussels sampled from Bizerte lagoon (northern Tunisia). Spatial and seasonal variations in a battery of seven biomarkers were analyzed in relation to environmental parameters (temperature, salinity, and pH), physiological status (condition and gonad indexes), stress on stress (SoS), and chemical contaminant levels (heavy metals, polycyclic aromatic hydrocarbons (PAHs), and PCBs) in digestive glands. Integrated biological response (IBR) was calculated using seven biomarkers (acetylcholinesterase (AChE), benzo[a]pyrene hydroxylase (BPH), multixenobiotic resistance (MXR), glutathione S-transferase (GST), catalase (CAT), malondialdehyde (MDA), and metallothioneins (MT). Seasonal variations in biological response were determined during a critical period between spring and summer at two sites, where chemical contamination varies by a factor of 2 for heavy metals and a factor 2.5 for PAHs. The analysis of a battery of biomarkers was combined with the measurement of physiological parameters at both sites, in order to quantify a maximum range of metabolic regulation with a temperature increase of 11 A degrees C between May and August. According to our results, the MT, MDA, CAT, and AChE biomarkers showed the highest amplitude during the 11 A degrees C rise, while the BPH, GST, and MXR biomarkers showed the lowest amplitude. Metabolic amplitude measured with the IBR at Menzel Abdelrahmen-the most severely contaminated station-revealed the highest metabolic stress in Bizerte lagoon in August, when temperatures were highest 29.1 A degrees C. This high metabolic rate was quantified for each biomarker in the North African lagoon area and confirmed in August, when the highest IBR index values were obtained at the least contaminated site 2 (IBR = 9.6) and the most contaminated site 1 (IBR = 19.6). The combined effects of chemical contamination and increased salinity and temperatures in summer appear to induce a highest metabolic adaptation response and can therefore be used to determine thresholds of effectiveness and facilitate the interpretation of monitoring biomarkers. This approach, applied during substantial temperature increases at two sites with differing chemical contamination, is a first step toward determining an environmental assessment criteria (EAC) threshold in a North African lagoon.</div></front></TEI><affiliations><list><country><li>France</li><li>Tunisie</li></country><region><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Metz</li><li>Nancy</li></settlement><orgName><li>Université de Lorraine</li></orgName></list><tree><country name="Tunisie"><noRegion><name sortKey="Kamel, Naouel" sort="Kamel, Naouel" uniqKey="Kamel N" first="Naouel" last="Kamel">Naouel Kamel</name></noRegion><name sortKey="Banni, Mohamed" sort="Banni, Mohamed" uniqKey="Banni M" first="Mohamed" last="Banni">Mohamed Banni</name><name sortKey="Boussetta, Hamadi" sort="Boussetta, Hamadi" uniqKey="Boussetta H" first="Hamadi" last="Boussetta">Hamadi Boussetta</name><name sortKey="Chalghaf, Mohamed" sort="Chalghaf, Mohamed" uniqKey="Chalghaf M" first="Mohamed" last="Chalghaf">Mohamed Chalghaf</name></country><country name="France"><noRegion><name sortKey="Burgeot, Thierry" sort="Burgeot, Thierry" uniqKey="Burgeot T" first="Thierry" last="Burgeot">Thierry Burgeot</name></noRegion><name sortKey="Devin, Simon" sort="Devin, Simon" uniqKey="Devin S" first="Simon" last="Devin">Simon Devin</name><name sortKey="Minier, Christophe" sort="Minier, Christophe" uniqKey="Minier C" first="Christophe" last="Minier">Christophe Minier</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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