1
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Büchner-Miranda JA, Jaramillo HN, Ramírez-Kuschel EF, Salas-Yanquin LP, Pérez-Echeverría I, Paredes-Molina FJ, Sabja-Llanos EN, Cubillos VM, Montory JA, Chaparro OR. Volcanic ash in the water column: Cellular, physiological and anatomical implications for the gastropod suspension-feeder Crepipatella peruviana (Lamarck, 1822). CHEMOSPHERE 2024; 365:143294. [PMID: 39265734 DOI: 10.1016/j.chemosphere.2024.143294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 09/02/2024] [Accepted: 09/05/2024] [Indexed: 09/14/2024]
Abstract
The influx of volcanic ash into seawater alters particle composition with implications for the cellular, physiological and anatomical response of suspension-feeding organisms. Adult females of Crepipatella peruviana were exposed to three diets consisting of a fixed concentration of 50,000 cells ml-1 of the microalga Isochrysis galbana plus different concentrations of ash particles (30, 90 and 150 mg L-1). The objective was to determine the cellular, physiological and anatomical responses. Mortality increased with ash concentrations, while feeding and respiration rates, tissue weight, and condition index decreased. The gills showed severe degradation of cilia and the presence of large mucous aggregates of cilia and ash. An increase in ash resulted in decreased lipid peroxidation and protein carbonyls, but increased total antioxidant capacity and phenols. Thus, volcanic ash particles may exert a high impact at both cellular and physiological levels for C. peruviana, where inhibition of gill function reduces the ability to acquire food.
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Affiliation(s)
| | - Hans N Jaramillo
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | | | - Luis P Salas-Yanquin
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | | | | | - Elayne N Sabja-Llanos
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - Victor M Cubillos
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - Jaime A Montory
- Centro i∼mar, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile
| | - Oscar R Chaparro
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile.
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2
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Montúfar-Romero M, Valenzuela-Muñoz V, Valenzuela-Miranda D, Gallardo-Escárate C. Hypoxia in the Blue Mussel Mytilus chilensis Induces a Transcriptome Shift Associated with Endoplasmic Reticulum Stress, Metabolism, and Immune Response. Genes (Basel) 2024; 15:658. [PMID: 38927594 PMCID: PMC11203016 DOI: 10.3390/genes15060658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 05/01/2024] [Accepted: 05/15/2024] [Indexed: 06/28/2024] Open
Abstract
The increase in hypoxia events, a result of climate change in coastal and fjord ecosystems, impacts the health and survival of mussels. These organisms deploy physiological and molecular responses as an adaptive mechanism to maintain cellular homeostasis under environmental stress. However, the specific effects of hypoxia on mussels of socioeconomic interest, such as Mytilus chilensis, are unknown. Using RNA-seq, we investigated the transcriptomic profiles of the gills, digestive gland, and adductor muscle of M. chilensis under hypoxia (10 days at 2 mg L-1) and reoxygenation (10 days at 6 mg L-1). There were 15,056 differentially expressed transcripts identified in gills, 11,864 in the digestive gland, and 9862 in the adductor muscle. The response varied among tissues, showing chromosomal changes in Chr1, Chr9, and Chr10 during hypoxia. Hypoxia regulated signaling genes in the Toll-like, mTOR, citrate cycle, and apoptosis pathways in gills, indicating metabolic and immunological alterations. These changes suggest that hypoxia induced a metabolic shift in mussels, reducing reliance on aerobic respiration and increasing reliance on anaerobic metabolism. Furthermore, hypoxia appeared to suppress the immune response, potentially increasing disease susceptibility, with negative implications for the mussel culture industry and natural bed populations. This study provides pivotal insights into metabolic and immunological adaptations to hypoxia in M. chilensis, offering candidate genes for adaptive traits.
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Affiliation(s)
- Milton Montúfar-Romero
- Interdisciplinary Center for Aquaculture Research (INCAR), Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile; (M.M.-R.); (V.V.-M.); (D.V.-M.)
- Biotecnology Center, Universidad de Concepción, Concepción 4030000, Chile
- Instituto Público de Investigación de Acuicultura y Pesca (IPIAP), Guayaquil 090314, Ecuador
| | - Valentina Valenzuela-Muñoz
- Interdisciplinary Center for Aquaculture Research (INCAR), Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile; (M.M.-R.); (V.V.-M.); (D.V.-M.)
- Escuela de Medicina Veterinaria, Facultad de Ciencias de la Naturaleza, Universidad San Sebastián, Concepción 4030000, Chile
| | - Diego Valenzuela-Miranda
- Interdisciplinary Center for Aquaculture Research (INCAR), Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile; (M.M.-R.); (V.V.-M.); (D.V.-M.)
- Biotecnology Center, Universidad de Concepción, Concepción 4030000, Chile
| | - Cristian Gallardo-Escárate
- Interdisciplinary Center for Aquaculture Research (INCAR), Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile; (M.M.-R.); (V.V.-M.); (D.V.-M.)
- Biotecnology Center, Universidad de Concepción, Concepción 4030000, Chile
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3
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Betancourtt C, Catalán AM, Morales-Torres DF, Lopez DN, Escares-Aguilera V, Salas-Yanquin LP, Büchner-Miranda JA, Chaparro OR, Nimptsch J, Broitman BR, Valdivia N. Transient species driving ecosystem multifunctionality: Insights from competitive interactions between rocky intertidal mussels. MARINE ENVIRONMENTAL RESEARCH 2024; 196:106422. [PMID: 38437777 DOI: 10.1016/j.marenvres.2024.106422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 02/20/2024] [Accepted: 02/21/2024] [Indexed: 03/06/2024]
Abstract
Anthropogenic biodiversity loss poses a significant threat to ecosystem functioning worldwide. Numerically dominant and locally rare (i.e., transient) species are key components of biodiversity, but their contribution to multiple ecosystem functions (i.e., multifunctionality) has been seldomly assessed in marine ecosystems. To fill this gap, here we analyze the effects of a dominant and a transient species on ecosystem multifunctionality. In an observational study conducted along ca. 200 km of the southeastern Pacific coast, the purple mussel Perumytilus purpuratus numerically dominated the mid-intertidal and the dwarf mussel Semimytilus patagonicus exhibited low abundances but higher recruitment rates. In laboratory experiments, the relative abundances of both species were manipulated to simulate the replacement of P. purpuratus by S. patagonicus and five proxies for ecosystem functions-rates of clearance, oxygen consumption, total biodeposit, organic biodeposit, and excretion-were analyzed. This replacement had a positive, linear, and significant effect on the combined ecosystem functions, particularly oxygen consumption and excretion rates. Accordingly, S. patagonicus could well drive ecosystem functioning given favorable environmental conditions for its recovery from rarity. Our study highlights therefore the key role of transient species for ecosystem performance. Improving our understanding of these dynamics is crucial for effective ecosystem conservation, especially in the current scenario of biological extinctions and invasions.
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Affiliation(s)
- Claudia Betancourtt
- Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile; Programa de Doctorado en Biología Marina, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile.
| | - Alexis M Catalán
- Centro de Investigación en Ecosistemas de la Patagonia, CIEP, Coyhaique, Chile
| | - Diego F Morales-Torres
- Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile
| | - Daniela N Lopez
- Instituto de Ciencias Ambientales y Evolutivas, Universidad Austral de Chile, Valdivia, Chile; Center of Applied Ecology and Sustainability (CAPES), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Valentina Escares-Aguilera
- Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile
| | - Luis P Salas-Yanquin
- Universidad Nacional Autónoma de México, Facultad de Ciencias, Unidad Multidisciplinaria de Docencia e Investigación, Sisal, Mexico
| | - Joseline A Büchner-Miranda
- Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile
| | - Oscar R Chaparro
- Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile
| | - Jorge Nimptsch
- Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile
| | - Bernardo R Broitman
- Instituto Milenio en Socio-Ecología Costera (SECOS), Chile; Núcleo Milenio UPWELL, Chile; Facultad de Artes Liberales, Universidad Adolfo Ibañez, Viña Del Mar, Chile
| | - Nelson Valdivia
- Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile; Centro FONDAP de Investigación de Dinámicas de Ecosistemas Marinos de Altas Latitudes (IDEAL), Chile
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4
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Zhu W, Kunz J, Brunson E, Barnhart C, Brown H, McMurray S, Roberts AD, Shulse C, Trauth K, Wang B, Steevens JA, Deng B. Impacts of acute and chronic suspended solids exposure on juvenile freshwater mussels. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 905:167606. [PMID: 37802351 DOI: 10.1016/j.scitotenv.2023.167606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 09/11/2023] [Accepted: 10/03/2023] [Indexed: 10/08/2023]
Abstract
Construction activities may affect adjacent water systems by introducing increased levels of suspended solids into the water body and may subsequently affect the survival and growth of freshwater mussels. We tested three sediment types from sites in Missouri, including Spring River sediment (SRS), Osage River bank clay soil (ORC), and quarried limestone from Columbia (LMT). We prepared series of suspensions of each sediment with total suspended solids concentrations ranging from 0 to 5000 mg/L. Juveniles from three mussel species, Fatmucket (Lampsilis siliquoidea), Arkansas Brokenray (Lampsilis reeveiana), and Washboard (Megalonaias nervosa) were exposed to these suspensions in both acute (96-h) and chronic (28-d) tests. No clear impact on survival was observed from the acute or chronic exposures, but chronic test showed that juvenile mussels' growth was strongly affected. Interestingly, growth was enhanced at lower levels of SRS and ORC (≤500 mg/L, p < 0.05), and the juvenile mussels exposed to 500 mg/L SRS exhibited approximately 60 % more dry weight than those reared in the control. LMT did not enhance growth. Growth was slowed by high concentrations (>1000 mg/L) of all three sediments, implying that high suspended solids levels could reduce survival in the long term. Our findings may help to inform regulations and guidelines for construction activities to minimize adverse effects on juvenile mussels.
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Affiliation(s)
- Wenyu Zhu
- Department of Civil & Environmental Engineering, University of Missouri, Columbia, MO, United States of America.
| | - James Kunz
- U.S. Geological Survey, Columbia Environmental Research Center, Columbia, MO, United States of America
| | - Eric Brunson
- U.S. Geological Survey, Columbia Environmental Research Center, Columbia, MO, United States of America
| | - Chris Barnhart
- Missouri State University, Springfield, MO, United States of America
| | - Henry Brown
- Department of Civil & Environmental Engineering, University of Missouri, Columbia, MO, United States of America
| | - Stephen McMurray
- Missouri Department of Conservation, Columbia, MO, United States of America
| | - Andrew D Roberts
- U.S. Fish and Wildlife Service, Missouri Ecological Services Field Office, Columbia, MO, United States of America
| | - Christopher Shulse
- Missouri Department of Transportation, Jefferson City, MO, United States of America
| | - Kathleen Trauth
- Department of Civil & Environmental Engineering, University of Missouri, Columbia, MO, United States of America
| | - Binbin Wang
- Department of Civil & Environmental Engineering, University of Missouri, Columbia, MO, United States of America
| | - Jeffery A Steevens
- U.S. Geological Survey, Columbia Environmental Research Center, Columbia, MO, United States of America
| | - Baolin Deng
- Department of Civil & Environmental Engineering, University of Missouri, Columbia, MO, United States of America
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5
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Montory JA, Cubillos VM, Lee MR, Chaparro OR, Gebauer P, Cumillaf JP, Cruces E. The interactive effect of anti-sea lice pesticide azamethiphos and temperature on the physiological performance of the filter-feeding bivalve Ostrea chilensis: A non-target species. MARINE ENVIRONMENTAL RESEARCH 2023; 183:105837. [PMID: 36481714 DOI: 10.1016/j.marenvres.2022.105837] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/23/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
The pesticide azamethiphos used by the salmon industry to treat sea lice, is applied as a bath and subsequently discharged into the sea. The effects of azamethiphos concentration (0, 15 and 100 μg L-1) on the physiology of the Chilean oyster (Ostrea chilensis) at two temperatures (12 and 15 °C) was examined. In all azamethiphos treatments, oysters kept at 15 °C had clearance rates (CR) higher than oysters kept at 12 °C. The oxygen consumption rate (OCR) increased at higher temperatures, except with 100 μg L-1 of azamethiphos, where no changes were observed. Sixty days after the exposure, survival rates of 91 and 79% (15 and 100 μg L-1, respectively), were observed compared to the controls, a situation independent of the experimental temperature. The interaction between temperature and pesticide has detrimental effects on the physiological performance and survival of O. chilensis, and these effects should also be assessed for other non-target species.
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Affiliation(s)
- Jaime A Montory
- Centro i∼mar, Universidad De Los Lagos, Casilla 557, Puerto Montt, Chile.
| | - Victor M Cubillos
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - Matthew R Lee
- Centro i∼mar, Universidad De Los Lagos, Casilla 557, Puerto Montt, Chile
| | - Oscar R Chaparro
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - Paulina Gebauer
- Centro i∼mar, Universidad De Los Lagos, Casilla 557, Puerto Montt, Chile
| | - Juan P Cumillaf
- Programa de Doctorado en Ciencias de la Acuicultura, Universidad Austral de Chile, Los Pinos s/n, Balneario Pelluco, Puerto Montt, Chile
| | - Edgardo Cruces
- Centro de Investigaciones Costeras-Universidad de Atacama (CIC-UDA), Universidad de Atacama, Avenida Copayapu 485, Copiapó, Chile
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6
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Fogliano C, Carotenuto R, Panzuto R, Spennato V, De Bonis S, Simoniello P, Raggio A, Avallone B, Agnisola C, Motta CM. Behavioral alterations and gills damage in Mytilus galloprovincialis exposed to an environmental concentration of delorazepam. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 97:104030. [PMID: 36455838 DOI: 10.1016/j.etap.2022.104030] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 11/19/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Psychoactive compounds, and benzodiazepines (BZPs) in particular, represent an important class of emerging pollutants due to their large (ab)use and high resistance to degradation. Nowadays it is known that sewage treatment does not completely eliminate these substances and, therefore, BZPs and their metabolites reach concern levels in most aquatic environments all over Europe, ranging from µg/L to ng/L. In this study, we investigated the effects of delorazepam on Mytilus galloprovincialis, a model organism in toxicity testing and a key species in coastal marine ecosystems. Given its psychoactive activity, the study primarily addressed discovering the effects on behavior, by conventional valve opening and closure tests. Possible cytotoxic activity was also investigated by analyzing valve abductor muscles, gills histology, and correlated oxygen consumption. Results demonstrate negative effects on mussel behavior, interference with metabolism, and alteration of gill morphology and protein content. In conclusion, delorazepam confirms its toxicity to aquatic environments, highlighting the possibility that BZDs can ultimately affect the structure of the food web and the functions of the coastal ecosystems.
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Affiliation(s)
- Chiara Fogliano
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Rosa Carotenuto
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Raffaele Panzuto
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Valentina Spennato
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Salvatore De Bonis
- Regional Agency for Environmental Protection of Latium (Arpa Lazio), Via Saredo, 00173 Rome, Italy
| | - Palma Simoniello
- Department of Science and Technology, University of Naples Parthenope, 80133 Naples, Italy
| | - Anja Raggio
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Bice Avallone
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy.
| | - Claudio Agnisola
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Chiara Maria Motta
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
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7
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Riedemann-Saldivia B, Büchner-Miranda JA, Salas-Yanquin LP, Valdivia N, Catalán AM, Scrosati RA, Chaparro OR. Non-consumptive effects of a predatory snail (Acanthina monodon) on a dominant habitat-forming mussel species (Perumytilus purpuratus). MARINE ENVIRONMENTAL RESEARCH 2022; 175:105573. [PMID: 35134640 DOI: 10.1016/j.marenvres.2022.105573] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 01/28/2022] [Accepted: 01/30/2022] [Indexed: 06/14/2023]
Abstract
Predators can influence prey through direct consumption as well as through non-consumptive effects (NCEs). NCEs usually occur mediated by behavioral changes in the prey upon detection of predator cues. Such changes may involve reduction of feeding with a variety of physiological consequences. We evaluated NCEs from an intertidal predatory snail (Acanthina monodon) on a dominant habitat-forming mussel species (Perumytilus purpuratus) from the southeastern Pacific coast. We tested whether A. monodon exerts negative NCEs on clearance rate, oxygen consumption rate, biodeposit production, and between-valve gap size in P. purpuratus. We found that waterborne predator cues triggered a decrease in these variables except biodeposit production. However, the organic content of the biodeposits increased in the presence of predator cues. The snail's physical contact with the mussels strengthened the negative NCEs on between-valve gap size. Since P. purpuratus is a dominant filter-feeder and foundation species in rocky intertidal habitats, predator NCEs on this species might indirectly influence ecosystem-level processes and community structure.
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Affiliation(s)
| | | | - Luis P Salas-Yanquin
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, 5090000, Valdivia, Chile
| | - Nelson Valdivia
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, 5090000, Valdivia, Chile; Centro FONDAP de Investigación de Dinámicas de Ecosistemas Marinos de Altas Latitudes (IDEAL), 5090000, Valdivia, Chile
| | - Alexis M Catalán
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, 5090000, Valdivia, Chile
| | - Ricardo A Scrosati
- Department of Biology, St. Francis Xavier University, Antigonish, Nova Scotia, B2G 2W5, Canada
| | - Oscar R Chaparro
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, 5090000, Valdivia, Chile.
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8
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Montory JA, Chaparro OR, Salas-Yanquin LP, Büchner-Miranda JA, Pechenik JA, Cubillos VM. Impact of Intertidal Distribution on the Physiological Performance of the Filter-Feeder Bivalve Perumytilus purpuratus (Bivalvia, Mytilidae) from Southern Chile. MALACOLOGIA 2021. [DOI: 10.4002/040.064.0108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
| | - Oscar R. Chaparro
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - Luis P. Salas-Yanquin
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | | | - Jan A. Pechenik
- Biology Department, Tufts University, Medford, Massachusetts 02155, U.S.A
| | - Victor M. Cubillos
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
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9
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Averbuj A, Büchner-Miranda JA, Salas-Yanquin LP, Navarro JM, Pardo LM, Matos AS, Pechenik JA, Chaparro OR. Energetic trade-offs: Implications for selection between two bivalve prey species by a carnivorous muricid gastropod. PLoS One 2021; 16:e0250937. [PMID: 33930071 PMCID: PMC8087043 DOI: 10.1371/journal.pone.0250937] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 04/16/2021] [Indexed: 11/19/2022] Open
Abstract
Active predators obtain energy and nutrients from prey through complex processes in which the energy gained must exceed the energy invested in finding and ingesting the prey. In addition, the amount of energy available will vary with the prey that are selected for consumption. The muricid gastropod Acanthina monodon inhabits rocky shores, where it routinely feeds on the mytilids Semimytilus algosus and Perumytilus purpuratus. In this study, S. algosus was highly preferred by the predator (over 90% were eaten) versus P. purpuratus (only 9% were eaten) when offered a mixed diet. The energetic cost of attacking one S. algosus individual was 91 J bivalve-1 while for P. purpuratus it was slightly higher: 95 J bivalve-1. Also, whereas A. monodon required on average 19 h to consume S. algosus, successful attacks on P. purpuratus required about 32% more time (25 h). In addition, a longer resting time was needed by the predator after preying on P. purpuratus before it initiated another attack. Moreover, the active metabolic costs associated with successfully attacking the prey increased 3.2 times over the basal metabolic costs when attacking S. algosus, but only by 2.5 times when attacking P. purpuratus. The calculations associated with preying on each species showed that the energetic gain per unit time likely accounts for the predator’s preference for attacking S. algosus, even though predation on both species provided net energy gains for the predator. However, as S. algosus occurs seasonally at our study site, P. purpuratus would probably also be consumed due to its constant availability throughout the whole year.
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Affiliation(s)
- A. Averbuj
- Laboratorio de Reproducción y Biología Integrativa de Invertebrados Marinos (LARBIM)–IBIOMAR, CCT CONICET–CENPAT, Puerto Madryn, Chubut, Argentina
| | - J. A. Büchner-Miranda
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - L. P. Salas-Yanquin
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - J. M. Navarro
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
- Centro FONDAP de Investigación de Dinámicas de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile
| | - L. M. Pardo
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
- Centro FONDAP de Investigación de Dinámicas de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile
| | - A. S. Matos
- Departamento de Biologia, Centro de Ciências, Laboratório de Invertebrados Marinhos do Ceará, Universidade Federal do Ceará, Fortaleza, Brasil
| | - J. A. Pechenik
- Biology Department, Tufts University, Medford, MA, United States of America
| | - O. R. Chaparro
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
- * E-mail:
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10
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Catalán AM, Büchner-Miranda J, Riedemann B, Chaparro OR, Valdivia N, Scrosati RA. Community-wide consequences of nonconsumptive predator effects on a foundation species. J Anim Ecol 2021; 90:1307-1316. [PMID: 33630333 DOI: 10.1111/1365-2656.13455] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 02/05/2021] [Indexed: 11/29/2022]
Abstract
Predators can exert nonconsumptive effects (NCEs) on prey, which often take place through prey behavioural adjustments to minimise predation risk. As NCEs are widespread in nature, interest is growing to determine whether NCEs on a prey species can indirectly influence several other species simultaneously, thus leading to changes in community structure. In this study, we investigate whether a predator can exert NCEs on a foundation species and indirectly affect community structure. Through laboratory experiments, we first tested whether the predatory marine snail Acanthina monodon exerts negative NCEs on larviphagy (consumption of pelagic larvae) and phytoplankton filtration rates of the mussel Perumytilus purpuratus, an intertidal foundation species. These hypotheses stem from the notion that mussels may decrease feeding activities in the presence of predator cues to limit detection by predators. Afterwards, a field experiment tested whether the presence of A. monodon near mussel beds leads to higher colonisation rates of invertebrates that reproduce through pelagic larvae (expected under a lower larviphagy in P. purpuratus) and to a lower algal biomass on P. purpuratus shells (expected under a lower metabolite excretion in the mussels), thereby changing the community structure of the species typically found in P. purpuratus beds. The laboratory experiments revealed that waterborne cues from A. monodon limit the larviphagy and filtration rates of P. purpuratus. In turn, the field experiment showed that A. monodon cues led to greater abundances of barnacles and bivalves and a lower algal biomass in P. purpuratus beds, thus altering community structure. Overall, this study shows that a predator can indirectly affect community structure through NCEs on an invertebrate foundation species. As invertebrate foundation species are ubiquitous worldwide, understanding predator NCEs on these organisms could help to better understand community regulation in systems structured by such species.
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Affiliation(s)
- Alexis M Catalán
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile.,Programa de Doctorado en Biología Marina, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | | | - Bárbara Riedemann
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - Oscar R Chaparro
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile
| | - Nelson Valdivia
- Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile.,Centro FONDAP de Investigación de Dinámica de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile
| | - Ricardo A Scrosati
- Department of Biology, St. Francis Xavier University, Antigonish, Nova Scotia, Canada
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Benitez-Polo Z, Velasco LA. Effects of suspended mineral coal dust on the energetic physiology of the Caribbean scallop Argopecten nucleus (Born, 1778). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 260:114000. [PMID: 32000023 DOI: 10.1016/j.envpol.2020.114000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 12/30/2019] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
The effects of increasing concentrations of suspended mineral coal dust on the energetic physiology of the Caribbean scallop Argopecten nucleus were studied, at a concentration range that is environmentally relevant and representative of areas proximate to coal loading and shipping ports. Adult hatchery-produced animals were exposed to different concentrations of coal dust, i.e. 0, 2, 9 and 40 mg L-1. At increasing concentrations of coal dust, the rates of filtration and pseudofeces production increased, while the rates of ingestion and absorption remained constant. The rates of oxygen consumption and ammonium excretion decreased, as well as the absorption efficiency and the scope for growth. Suspended coal dust particles, at concentrations higher than or equal to 2 mg L-1, were ingested preferentially over microalgae by A. nucleus, causing reductions in its absorption capability, metabolism and in the amount of energy for growth and reproduction, thus generating physiological stress.
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Affiliation(s)
- Z Benitez-Polo
- Laboratorio de Moluscos y Microalgas, Universidad del Magdalena, Carrera 32 No. 22-08, Sector San Pedro Alejandrino, Santa Marta, Colombia.
| | - L A Velasco
- Laboratorio de Moluscos y Microalgas, Universidad del Magdalena, Carrera 32 No. 22-08, Sector San Pedro Alejandrino, Santa Marta, Colombia.
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