Journal of Experimental Marine Biology and Ecology最新文献

{"title":"Comment: A reexamination of Johnston et al., 2023, bed-scale impact and recovery of a commercially important intertidal seaweed","authors":"Robin Hadlock Seeley ,&nbsp;Sarah Hardy ,&nbsp;Nancy K. Prentiss ,&nbsp;Walter H. Adey","doi":"10.1016/j.jembe.2023.151984","DOIUrl":"https://doi.org/10.1016/j.jembe.2023.151984","url":null,"abstract":"<div><p>Johnston et al., 2023 (Bed-scale impact and recovery of a commercially important intertidal seaweed. J. Exp. Mar. Biol. Ecol. 561) report that rockweed biomass recovers to pre-harvest levels one year after commercial harvest. The Johnston et al. study has two major problems in design, execution, and interpretation of results: 1) industry partner conflict of interest and statistically undetectable impact of the harvest treatment on <em>Ascophyllum nodosum</em> (rockweed) beds, 2) incomplete statistical analysis with inappropriate inferential conclusions about biomass recovery of harvested rockweed beds. Our analysis of their data shows that the only regions of the coast where rockweed biomass recovered to pre-harvest levels are the three regions where the harvest treatment was never detectable. In the one region where the harvest treatment was detectable, rockweed biomass did not recover to pre-harvest levels in a year. Rockweed is a foundational species in the rocky intertidal food web as well as an ecosystem engineer. The improper interpretation by Johnston, et al. of the study data is misleading ecosystem managers and the public about the impacts of commercial rockweed harvests. Most concerning, this paper sets a false foundation for marine policy on commercial rockweed harvesting in Maine.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"574 ","pages":"Article 151984"},"PeriodicalIF":2.0,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0022098123001168/pdfft?md5=24ac887c0aaef1ea68321ff8ca4228fb&pid=1-s2.0-S0022098123001168-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140539399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of food value on host use by the herbivorous amphipod Sunamphitoe pelagica","authors":"Aynara R. Andrade ,&nbsp;Caio A. Paula ,&nbsp;Fosca P.P. Leite ,&nbsp;Tânia M. Costa ,&nbsp;Glauco B.O. Machado","doi":"10.1016/j.jembe.2024.152007","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152007","url":null,"abstract":"<div><p>Mesograzers often use macrophytes as both food and habitat and may have strong effects on primary producers. In this context, understanding the factors mediating their interaction with macrophytes, such as host food value, is an important step to predict the impacts of these herbivores on aquatic ecosystems. The amphipod <em>Sunamphitoe pelagica</em> is a mesograzer with distribution restricted to a few brown macroalgal hosts, however it is unclear if food value drives host use by this mesograzer. Herein, we investigated the distribution of <em>S. pelagica</em> and the food value of its hosts. For that, the abundance of <em>S. pelagica</em> on the macroalgae <em>Sargassum filipendula</em>, <em>Padina gymnospora</em>, and <em>Dichotomaria marginata</em> was evaluated seasonally in a subtidal rocky shore at Fortaleza Beach (23°32′S, 45°10′W), state of São Paulo, Brazil. Furthermore, we conducted laboratory experiments to test feeding preference and rate, as well as the performance (e.g. survival, growth, and reproductive potential) of <em>S. pelagica</em> using the same macroalgal hosts used in the field abundance investigation. Overall, the mesograzer was more abundant on the brown macroalgae <em>Sargassum</em> and <em>Padina</em> than on the red macroalga <em>Dichotomaria</em>. In both feeding preference and rate experiments, <em>S. pelagica</em> consumed more <em>Sargassum</em> and <em>Padina</em> than <em>Dichotomaria</em>. Moreover, the consumption of <em>Padina</em> and <em>Sargassum</em> resulted in high performance of this mesograzer, while juveniles raised on <em>Dichotomaria</em> had a low survival, perishing within few days of experiment. These results suggest the host use by <em>S. pelagica</em> is strongly driven by the food value of macroalgal hosts and are in accordance with the narrow host breadth of this mesograzer. Therefore, considering the vulnerability of large macroalgae to climate change and habitat alterations, the restricted host use by <em>S. pelagica</em> to few brown macroalgae may increase its risk of local extinction.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"574 ","pages":"Article 152007"},"PeriodicalIF":2.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140308613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Important mesopredator restricts feeding in response to risk cues from a new invasive predator","authors":"Hannah Diebboll","doi":"10.1016/j.jembe.2024.152008","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152008","url":null,"abstract":"<div><p>Invasive predators can alter community structure and dynamics in their invaded communities through direct consumption of prey and by inducing prey to alter traits, such as behavior or morphology, to avoid predation. These changes can modify the strength or even the direction of species interactions which can have cascading effects throughout a community. On rocky shores in the Gulf of Maine, an important mesopredator, the whelk <em>Nucella lapillus,</em> alters its feeding behavior when it detects waterborne chemical cues of a long-established invasive crab, <em>Carcinus maenas</em>, potentially impacting the abundance and distribution patterns of sessile species and energy flow through the food web. A more recent invasive crab, <em>Hemigrapsus sanguineus</em>, has become a dominant predator in the southern Gulf of Maine rocky intertidal, but our understanding of its impacts on community structure and dynamics remains incomplete. I examined whether chemical cues from <em>Hemigrapsus</em> alter the feeding behavior of <em>Nucella</em> to better understand how native fauna are responding to this relatively new invasive predator and its potential impacts on the community. <em>Nucella</em> exhibited a risk-induced change in feeding behavior by significantly reducing its feeding rate on blue mussels (<em>Mytilus edulis</em>) when <em>Hemigrapsus</em> cues were detected. These findings demonstrate the capacity for rapid behavioral responses to new invasive species and highlight the potential for such interactions to alter community structure and dynamics.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"574 ","pages":"Article 152008"},"PeriodicalIF":2.0,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140195884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ecological and biochemical considerations based on stable isotope analysis of blood: A case study from two juvenile lamnid sharks","authors":"Elena Tamburin ,&nbsp;Sora L. Kim ,&nbsp;Fernando R. Elorriaga-Verplancken ,&nbsp;Alberto Sánchez-González ,&nbsp;Agustín Hernández-Herrera ,&nbsp;Mauricio Hoyos-Padilla ,&nbsp;José Leonardo Castillo-Geniz ,&nbsp;Carlos Javier Godinez-Padilla ,&nbsp;Felipe Galván-Magaña","doi":"10.1016/j.jembe.2024.152005","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152005","url":null,"abstract":"<div><p>Shortfin mako (<em>Isurus oxyrinchus</em>) and white shark (<em>Carcharodon carcharias</em>) are migratory top predators, worldwide distributed, and keystone species considered Vulnerable by International Union for Conservation of Nature (IUCN). Their ecology is generally well described for adult stages, however habitat preferences and trophic ecology of juvenile phases (i.e., neonates, young of the year [YOY], juveniles) are still poorly described. This knowledge is important to strengthen management and conservation strategies. Additionally, there is also a scarceness of data concerning the impact of tissue biochemical composition on isotopic ratios. This study investigates the influence of the tissue biochemistry on the blood isotopic composition of young shortfin mako and white sharks. Our results provide biological information to understand the ecology and behavior of young shortfin mako and white sharks in a shared nursery area in Baja California (Mexico) using a multi-tissue approach. We compared stable isotopes (SIA) of carbon (δ¹³C) and nitrogen (δ¹⁵N) from different blood fractions (i.e. whole blood, RBCs and plasma) among juvenile shortfin mako and white sharks. The results indicated consistent increase in δ¹⁵N values from newborn to larger juvenile stages and includes a first estimation of the incorporation rates in different blood components. Based on our isotopic results, we proposed that the blood biochemistry between life stages influences the isotopic composition of tissues, more than dietary changes in consumed prey. The similar isotopic results of both species by size suggest a resource sharing and common habitat use throughout extended periods, reinforcing the importance of Sebastian Vizcaino Bay as nursery area, and especially as parturition ground for shortfin mako sharks. Finally, this study provides important information for blood sample preservation and represents a first characterization of blood isotopic composition, highlighting the need for further research to better explore how isotopic values can be influenced by different factors (i.e., biochemistry and ecology) and constitutes a baseline for further research.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"574 ","pages":"Article 152005"},"PeriodicalIF":2.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140163711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Differences in Aurelia coerulea and Nemopilema nomurai colony proliferation and biofouling invasion at various in situ polyp densities in Jiaozhou Bay, China","authors":"Song Feng ,&nbsp;Xueting Xu ,&nbsp;Aiyong Wan ,&nbsp;Song Sun","doi":"10.1016/j.jembe.2024.152006","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152006","url":null,"abstract":"<div><p>Scyphozoan polyp colonies are typically patchily distributed on substrate surfaces at varying densities in the natural environment. We investigated the differences in <em>Aurelia coerulea</em> and <em>Nemopilema nomurai</em> colony proliferation and biofouling invasion at high and low <em>in situ</em> polyp densities in Jiaozhou Bay, China, to explore potential polyp density-dependent effects. The study found that <em>in situ A. coerulea</em> polyp colonies on settling plates consistently survived at high initial density (24.4 ± 2.8 ind•cm⁻²) over a one-year experiment, but 60% of colonies disappeared at low initial density (0.6 ± 0.1 ind•cm⁻²). Polyp density in these colonies constantly fluctuated with a significant difference between the two treatments, decreasing by 71.5 ± 37.0% relative to the original level at high initial density by the end of the experiment, but increasing by 237.4 ± 662.7% at low initial density. In contrast, all <em>N. nomurai</em> polyps, whether at high or low initial density (1.9 ± 0.6 ind•cm⁻² and 0.2 ± 0.0 ind•cm⁻²), died after approximately six weeks. Strobilation occurred in <em>A. coerulea</em>, but not in <em>N. nomurai</em> owing to the untimely die-off of polyp colonies. No significant differences in strobilation percentage, number of discs strobila⁻¹ and the calyx diameter of polyps were observed between the two density treatments. Macro-fouling organisms (<em>e.g.</em>, ascidians and bryozoans) invaded the settling plates one week after the start of the experiment. Their coverage percentage was significantly lower at high initial polyp density in <em>A. coerulea</em> in a year, but there was no significant difference between both treatments in <em>N. nomurai</em> polyps. Nudibranch predators were discovered in the biofouling communities during the summer, with no significant differences in their numbers between the two treatments for each polyp species. The results indicated that density-dependent effects may play an important role in regulating <em>in situ</em> polyp colony proliferation and combatting biofouling invasion in <em>A. coerulea</em>, but not in <em>N. nomurai</em>. High colony survival and low levels of biofouling invasion at high initial polyp densities in <em>A. coerulea</em> might favor their extensive colonization in natural environment over extended periods of time.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"574 ","pages":"Article 152006"},"PeriodicalIF":2.0,"publicationDate":"2024-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140069676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the effectiveness of baited video and traps for quantifying the mobile fauna on artificial reefs in northern China","authors":"Yanchao Zhang ,&nbsp;Zheyang Ou ,&nbsp;James R. Tweedley ,&nbsp;Neil R. Loneragan ,&nbsp;Xiumei Zhang ,&nbsp;Tao Tian ,&nbsp;Zhongxin Wu","doi":"10.1016/j.jembe.2024.152001","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152001","url":null,"abstract":"<div><p>Baited remote underwater video (BRUV), with its non-destructive nature and ease of replication, is an effective and widely used method to record the relative abundance and behavior of aquatic fauna. However, the effectiveness of BRUVs for investigating the structural and functional diversity of mobile fauna on artificial reefs has not been fully evaluated. In China artificial reefs form an important component of very extensive marine ranching systems along the coast. This study used BRUVs and baited fish traps (traps), a traditional and popular fishing gear in the coastal waters of northern China, over six months to quantify the mobile fauna around artificial reefs and adjacent natural substrate (“control”) and compared the richness, abundance, community composition and functional diversity of reefs and control areas and BRUVs and traps. A significantly greater number of species and relative abundance was recorded using BRUVs than traps. Significant differences in faunal composition were detected between the two methods (BRUVs, traps), the two habitats (artificial reef, control) and the seven sampling occasions. Measures of functional diversity were also all significantly higher using data derived from BRUVs than traps. The weighted average analysis of functional traits revealed that those related to feeding and space use were more diverse from BRUVs. These results indicate that BRUVs provided a more complete representation of the mobile fauna than traps and show great potential for fishery-independent monitoring of marine ranching in China.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"573 ","pages":"Article 152001"},"PeriodicalIF":2.0,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139936234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal fluctuations independently modulate physiological plasticity and the dynamics of the gut microbiome in a tropical rocky shore oyster","authors":"Bovern Suchart Arromrak ,&nbsp;Adrian Tsz Chun Wong ,&nbsp;Tin Yan Hui ,&nbsp;Kin Sum Leung ,&nbsp;Gray A. Williams ,&nbsp;Monthon Ganmanee ,&nbsp;Thierry Durand ,&nbsp;Jetty Chung-Yung Lee ,&nbsp;Juan D. Gaitan-Espitia","doi":"10.1016/j.jembe.2024.152004","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152004","url":null,"abstract":"<div><p>Extreme high thermal conditions on tropical rocky shores are challenging to the survival of intertidal ectotherms. Yet, many species are highly successful in these environments in part due to their ability to regulate intrinsic mechanisms associated with physiological stress and their metabolic demand. More recently, there has been a growing awareness that other extrinsic mechanisms, such as animal-associated microbial communities, can also influence the tolerance and survival of ectotherms under stressful conditions. However, the extent to which the intrinsic and extrinsic mechanisms are functionally linked as part of the overall adaptive response of intertidal animals to temperature change and stress is poorly understood. Here, we examined the dynamics and potential interactions of intrinsic and extrinsic mechanisms in the tropical high-supratidal oyster, <em>Isognomon nucleus</em>. We found that oysters modulate their internal biochemistry (oxidized PUFA products, including 5-F_2t-IsoP, 10-F_4t-NeuroP, 13-F_4t-NeuroP, and 16-F_1t-PhytoP) as part of their adaptive regulation to cope with physiological stress during periods of extreme high temperatures when emersed. However, while we detected variation in alpha diversity (ASV richness and Shannon diversity index), dominant microbial taxa and microbial functions across time, no association was found with the host biochemical profiles. The findings here suggest that the thermal condition within oysters can independently influence their intrinsic biochemical responses and extrinsic microbiome profiles. Together, these mechanisms may contribute to the thermal tolerance and survival of the oysters in the challenging conditions of the tropical high-supratidal zone.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"573 ","pages":"Article 152004"},"PeriodicalIF":2.0,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139936346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carryover effects and feeding behavior of Atlantic surfclams in response to climate change","authors":"Raymond Czaja Jr ,&nbsp;Emmanuelle Pales Espinosa ,&nbsp;Robert M. Cerrato ,&nbsp;Bassem Allam","doi":"10.1016/j.jembe.2024.152002","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152002","url":null,"abstract":"<div><p>Temperature and food availability play large roles in bivalve energetics. Understanding bivalve responses to variability in temperature and food availability (i.e., phytoplankton), is important as climate change leads to ocean warming and changes in phytoplankton production. However, few studies address how changes in seasonal temperature regimes, such as an elevated fall or accelerated spring temperature regime affect bivalves via carryover effects, whereby response signals are detected months following temperature regime exposure. Few studies also address how bivalve feeding preferences may respond to variability in temperature and food availability. Here, controlled laboratory experiments simulated climate changed-induced fall and spring temperature regimes for Atlantic surfclams, <em>Spisula solidissima solidissima</em>. A variety of physiological responses were measured, including scope for growth, gonad development and feeding behavior, plus preferences for different phytoplankton groups. Carryover effects were observed where surfclams that experienced an elevated (+ 3.0 °C) fall temperature regime yielded enhanced gonad development the following spring (i.e., &gt; 6 months later). An accelerated spring temperature regime (a more rapid temperature increase to 17 °C from 7 °C) also impacted surfclam scope for growth. Temperature was the primary driver of surfclam clearance rates, but food concentration was the primary driver of surfclam feeding preferences. Surfclams displayed preferential selection of diatoms and chlorophytes over cryptophytes and cyanobacteria, but increased food availability led to decreased selection of diatoms and a relative increase in the uptake of cyanobacteria. These results suggest that climate change induced alterations in food availability and seasonal temperature regimes may affect surfclam metabolism, reproduction and feeding preferences.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"573 ","pages":"Article 152002"},"PeriodicalIF":2.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139915418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coral mucus effects on bacterial growth, respiration, and grazing mortality in reef systems","authors":"Akito Taniguchi ,&nbsp;Shota Nishimura ,&nbsp;Mitsuru Eguchi","doi":"10.1016/j.jembe.2024.152003","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152003","url":null,"abstract":"<div><p>Coral releases mucus into the surrounding seawater, providing an important organic and nutrient source for bacteria in coral reef systems. Despite thorough investigation in previous studies, bacteria respiration and grazing mortality by nanoplankton in coral reef systems remain poorly understood. To understand organic matter cycle in reef systems, it is necessary to reveal how coral mucus influences the energy and material transfer efficiency of the microbial loop. Here, we examined the production and grazing mortality of bacteria using a dilution method and the respiration of bacteria by directly measuring oxygen consumption in <em>Acropora</em> mucus-supplemented seawater (MuSW) multiple times over several years. The mucus significantly enhanced the bacterial production in MuSW compared with that in seawater. Bacterial respiration in MuSW was also significantly higher than that in seawater (SW). Bacterial carbon demand in MuSW was also higher than that in SW; however, bacterial growth efficiency did not change significantly. These results suggest that coral mucus benefits both bacterial growth and respiration. On the other hand, bacterial grazing mortality was not significantly different between MuSW and SW, suggesting that coral mucus did not directly enhance the activity and/or growth of bacterial grazers. According to previous reports, nanoflagellate number increases in response to an increase in bacteria. This suggests that coral mucus would have an indirect and delayed impact on bacterial grazers, whereas it would have a direct and immediate impact on bacteria. This study highlights that coral mucus raises the level of bacterial activity and could drive matter cycles through the microbial loop in reef systems.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"573 ","pages":"Article 152003"},"PeriodicalIF":2.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139915060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antagonistic impacts of benthic bioturbator species: Interconnected effects on sedimentary properties, biogeochemical variables, and microbial dynamics","authors":"J. Morelle ,&nbsp;A. Huguet ,&nbsp;A. Richard ,&nbsp;A.M. Laverman ,&nbsp;C. Roose-Amsaleg ,&nbsp;E. Parlanti ,&nbsp;M. Sourzac ,&nbsp;V. Mesnage ,&nbsp;N. Lecoq ,&nbsp;J. Deloffre ,&nbsp;E. Viollier ,&nbsp;O. Maire ,&nbsp;F. Orvain","doi":"10.1016/j.jembe.2024.152000","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152000","url":null,"abstract":"<div><p>Macrofaunal species inhabiting intertidal mudflats and performing intense bioturbation are considered as ecosystem engineers, since they profoundly influence their physical, chemical, and biological environments. Nowadays, to complete our knowledge on the effect of bioturbation processes on the surrounding environment, interdisciplinary approach is essential to unravel their complex intertwined effects on intertidal mudflats. In this study, the effects of bioturbators on sediment properties, biogeochemical variables, and microbial dynamics (microphytobenthos, bacteria and archaea) were investigated. To this end, manipulation experiments were carried out in an intertidal mudflat of the Seine Estuary (France) by revamped the abundance of the two dominant bioturbators, <em>Scrobicularia plana</em> and <em>Hediste diversicolor</em>, in winter and late summer. Results showed that the presence of <em>H. diversicolor</em> in winter had a significant effect, with a significant increase in bed level accretion and microbial nitrate reduction rates. In contrast, the presence of <em>S. plana</em> showed no significant impact on sediment properties, most likely due to a reduced bioturbating activity at low temperature. In summer, both ecosystem engineers strongly influenced their surrounding environment but with opposite effects. The intense reworking of the sediment surface by <em>S. plana</em> limited microbial growth and enhanced erosion processes. Conversely, the presence of <em>H. diversicolor</em> favoured sediment accretion and enhanced microbial growth. Overall, this interdisciplinary study confirms the importance of these two ecosystem engineers in temperate estuarine mudflats by highlighting their simultaneous and intertwined effects on the sedimentary, physicochemical, and biological features. This confirms the importance of actively considering ecosystem engineers when restoring the natural habitats of tidal flats to cope with the different vulnerability risks related to global warming (sandification of estuarine sediments, disappearance of productive mudflats, sea level rise, vulnerability to storms and erosion).</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"573 ","pages":"Article 152000"},"PeriodicalIF":2.0,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139744153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}