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Mincarelli LF, Chapman EC, Rotchell JM, Turner AP, Wollenberg Valero KC. Sex and gametogenesis stage are strong drivers of gene expression in Mytilus edulis exposed to environmentally relevant plasticiser levels and pH 7.7. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:23437-23449. [PMID: 36322353 PMCID: PMC9938808 DOI: 10.1007/s11356-022-23801-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
Plastic pollution and changes in oceanic pH are both pressing environmental issues. Little emphasis, however, has been placed on the influence of sex and gametogenesis stage when investigating the effects of such stressors. Here, we examined histology and molecular biomarkers of blue mussels Mytilus edulis exposed for 7 days to a pH 7.7 scenario (- 0.4 units) in combination with environmentally relevant concentrations (0, 0.5 and 50 µg/L) of the endocrine disrupting plasticiser di-2-ethylhexyl phthalate (DEHP). Through a factorial design, we investigated the gametogenesis cycle and sex-related expression of genes involved in pH homeostasis, stress response and oestrogen receptor-like pathways after the exposure to the two environmental stressors. As expected, we found sex-related differences in the proportion of developing, mature and spawning gonads in histological sections. Male gonads also showed higher levels of the acid-base regulator CA2, but females had a higher expression of stress response-related genes (i.e. sod, cat, hsp70). We found a significant effect of DEHP on stress response-related gene expression that was dependent on the gametogenesis stage, but there was only a trend towards downregulation of CA2 in response to pH 7.7. In addition, differences in gene expression between males and females were most pronounced in experimental conditions containing DEHP and/or acidified pH but never the control, indicating that it is important to consider sex and gametogenesis stage when studying the response of mussels to diverse stressors.
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Affiliation(s)
| | - Emma C Chapman
- Department of Biological and Marine Sciences, University of Hull, Hull, HU6 7RX, UK
| | - Jeanette M Rotchell
- Department of Biological and Marine Sciences, University of Hull, Hull, HU6 7RX, UK
| | - Alexander P Turner
- Department of Computer Science, University of Nottingham, Nottingham, NG8 1BB, UK
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Oróstica MH, Wyness AJ, Monsinjon JR, Nicastro KR, Zardi GI, Barker C, McQuaid CD. Effects of habitat quality on abundance, size and growth of mussel recruits. HYDROBIOLOGIA 2022; 849:4341-4356. [PMID: 36065210 PMCID: PMC9434526 DOI: 10.1007/s10750-022-04994-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 05/02/2023]
Abstract
UNLABELLED Recruitment of mussels is a complex process with the successful arrival of individuals hinging on the availability of suitable habitats. We examined the effects of adult mussels as settlement habitat and the degree to which the suitability of habitat they offer is species-specific by comparing the recruitment success of intertidal mussels. We hypothesised that mussel recruitment and early growth are dictated by the quality of habitat offered by conspecifics adults. We used a unique experimental arena on the south coast of South Africa, where Mytilus galloprovincialis and two lineages of Perna perna co-exist. Treatments were based on the translocation of individuals of M. galloprovincialis, western- and eastern lineage of P. perna to a single site, where artificial beds were created and sampled monthly over one year. Recruit's number, their sizes and growth were greater within beds of the western lineage of Perna than eastern lineage or Mytilus beds. The results clearly demonstrate that the quality of settlement habitat offered by adult beds differs among adult lineages/species and affects rates of settlement and the early growth of recruits. This effect extends to the intraspecific level; we found greater differences in density and growth of recruits between lineages of Perna than between either lineage and M. galloprovincialis. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s10750-022-04994-7.
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Affiliation(s)
- Mauricio H. Oróstica
- Department of Zoology and Entomology, Rhodes University, Grahamstown, 6140 South Africa
- Departamento de Ciencias, Facultad de Artes Liberales, Universidad Adolfo Ibañéz, 2562340 Viña del Mar, Chile
| | - Adam J. Wyness
- Department of Zoology and Entomology, Rhodes University, Grahamstown, 6140 South Africa
- School of Biology and Environmental Sciences, University of Mpumalanga, Mbombela, 1200 South Africa
| | - Jonathan R. Monsinjon
- Department of Zoology and Entomology, Rhodes University, Grahamstown, 6140 South Africa
- Institut Français de Recherche pour l’Exploitation de la Mer (IFREMER), Délégation Océan Indien (DOI), Rue Jean Bertho, BP 60 - 97822, 97420 Le Port, La Réunion France
| | - Katy R. Nicastro
- Department of Zoology and Entomology, Rhodes University, Grahamstown, 6140 South Africa
- CCMAR–Centro de Ciencias do Mar, CIMAR Laboratório Associado, Universidade do Algarve, Campus de Gambelas, 8005‐139 Faro, Portugal
- Univ. Lille, CNRS, Univ. Littoral Côte d’Opale, UMR 8187 – LOG – Laboratoire d’Océanologie et de Géosciences, 59000 Lille, France
| | - Gerardo I. Zardi
- Department of Zoology and Entomology, Rhodes University, Grahamstown, 6140 South Africa
- CCMAR–Centro de Ciencias do Mar, CIMAR Laboratório Associado, Universidade do Algarve, Campus de Gambelas, 8005‐139 Faro, Portugal
| | - Cassandra Barker
- Department of Zoology and Entomology, Rhodes University, Grahamstown, 6140 South Africa
- Department of Botany and Zoology, Stellenbosch University, Stellenbosch, 7600 South Africa
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