Journal of Experimental Marine Biology and Ecology最新文献

{"title":"Does the extent of glacial cover across watersheds and discharge periods affect dietary resource use of nearshore fishes in the Northern Gulf of Alaska?","authors":"Lindsey Stadler ,&nbsp;Kristen Gorman ,&nbsp;Vanessa von Biela ,&nbsp;Andrew Seitz ,&nbsp;Katrin Iken","doi":"10.1016/j.jembe.2024.152022","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152022","url":null,"abstract":"<div><p>Northern high-latitude glaciers impact nearshore marine ecosystems through the discharge of cold and fresh waters, including nutrients and organic matter. Fishes are important integrators of ecosystem processes and hold key positions in the transfer of energy to higher trophic positions in such systems. This study used a natural gradient in space and time, including watershed glacial cover (0–60%) of five adjacent estuaries and three sequential discharge periods (pre-peak, peak, post-peak) in the northern Gulf of Alaska (Kachemak Bay) to test whether differences in glacial cover of watersheds upstream of estuaries affect dietary resource use of nearshore fishes. Dietary resource use was assessed using stomach content and stable carbon and nitrogen isotope analyses to determine fish diet composition and trophic niche width. Crescent gunnel (<em>Pholis laeta</em>), a mostly sedentary species, was our focal species for comparisons across estuaries and discharge periods. Discharge period had a greater influence on diet composition and trophic niche width of crescent gunnels than watershed glacial coverage. Niche width of crescent gunnel was larger during the post-peak discharge period compared to pre-peak and peak periods, coincident with a shift in prey spectrum. However, watershed glacial cover was not a suitable predictor of niche width of crescent gunnel. Trophic resource use was also considered along this glacial cover gradient for two other fish species, Pacific staghorn sculpin (<em>Leptocottus armatus</em>) and starry flounder (<em>Platichthys stellatus</em>), but within the post-peak discharge period only. These species exploited a larger prey base compared to crescent gunnel, likely due to their greater mobility. Similar to crescent gunnel, there were no relationships in trophic niche width associated with watershed glacial coverage for these other species during the post-peak discharge period. Instead, trophic resource use of these three nearshore fish species was influenced by a more complex set of dynamic environmental variables (salinity, temperature, turbidity, and discharge), as well as static watershed characteristics, especially vegetation cover. Such drivers can act through changes in metabolic rates, modulating foraging strategies and trophic connectivity, as well as terrestrial nutrient delivery to support estuarine production. The environmental conditions associated with the glacially influenced estuaries during our study period (2020−2021) seemed within a range that allowed nearshore fishes to maintain energy pathways and prey bases across these estuaries, but it is unknown how these estuarine food webs may be influenced in years of extreme conditions such as during heat waves, droughts, or floods.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"577 ","pages":"Article 152022"},"PeriodicalIF":2.0,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0022098124000376/pdfft?md5=897bbeb054cf789cdbfe900aeb91a644&pid=1-s2.0-S0022098124000376-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141083305","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":"Particle loads, contractile responses and cleaning in the demosponge Halichondria panicea","authors":"Josephine Goldstein ,&nbsp;Hans Ulrik Riisgård ,&nbsp;Rachael A. Kealy ,&nbsp;Peter Funch","doi":"10.1016/j.jembe.2024.152021","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152021","url":null,"abstract":"<div><p>Sponges exposed to high concentrations of particles during filter-feeding may become overloaded, triggering closure of the osculum and contraction of the sponge, thus preventing too many particles from entering the aquiferous system. However, the minimum particle concentration of small versus larger particles that triggers contractions has not yet been described. Here, based on microscope-video recordings, we report our observations of explants of the demosponge <em>Halichondria panicea</em>. Explants contracted within &lt;1 h in response to high concentrations of cyanobacteria (<em>Cyanobium bacillare</em>; 1 × 10⁶ cells mL⁻¹), small 2 μm beads (1 × 10⁷ particles mL⁻¹), larger algal cells (<em>Rhodomonas salina</em>), and 10 μm beads (1 × 10⁵ mL⁻¹, respectively). No contractions occurred in sponge explants exposed to these particle types at concentrations &lt;0.5 × 10⁴ mL⁻¹. Likewise, inorganic marl and ink particles induced osculum closure in sponge explants at concentrations ranging from 1 × 10⁵ to 1 × 10⁶ particles mL⁻¹. When the explants were subsequently transferred to clean water, they either expelled the ingested inorganic particles in mucus-entangled clumps with the exhalant jet, or translocated the particles to the sponge surface along with local peristaltic-like contractions. The trigger levels of inorganic particles were high compared to reported re-suspended sediment concentrations in the sea, and the observed contractile responses may thus primarily serve to protect sponges from clogging during extreme environmental events.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"577 ","pages":"Article 152021"},"PeriodicalIF":2.0,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0022098124000364/pdfft?md5=2af67b5ff597c877189165b52e9caad5&pid=1-s2.0-S0022098124000364-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141083306","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":"Effects of sediment type and light availability on the burying behaviour of small sandeel (Ammodytes tobianus)","authors":"Ole Henriksen ,&nbsp;Nicholas P. Moran ,&nbsp;Louis A. Veilex ,&nbsp;Jane W. Behrens ,&nbsp;Anders Nielsen ,&nbsp;Tobias K. Mildenberger ,&nbsp;Peter J. Wright ,&nbsp;Henrik Jensen ,&nbsp;Mikael van Deurs","doi":"10.1016/j.jembe.2024.152020","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152020","url":null,"abstract":"<div><p>This study examines the sediment preferences of small sandeel (<em>Ammodytes tobianus</em>), an elongated forage fish common in marine and brackish environments of northern Europe. Sandeel have a high fidelity for sandy habitats and spend much of their lives buried, as an important part of both their diel behavioural cycles and overwintering behaviour. A series of independent choice laboratory assays were conducted using wild-caught schools of small sandeel, to: (1) determine their preferred substrate composition for burial; (2) identify the upper limits of sediment grain-sizes that may be utilised for burial, and; (3) investigate the effects of light intensity on burial behaviour. Initial experiments found a clear preference for burial within sediments composed of coarse sand and fine gravel (0.5–4.0 mm) but showed at least some utilisation of both coarser and finer sediment compositions. In further trials, burial was found to be almost entirely eliminated in sediments that contained significant gravel components &gt;4.0 mm. Light manipulation experiments also showed that light intensity was an important factor that influences their choice of burial area. This study is the first to experimentally investigate the sediment preferences and grain-size tolerance limits of small sandeel. These results specifically highlight how subtle differences in both sediment composition and light may influence the habitat usage of small sandeel, which may be valuable for understanding their distribution in the wild and to inform future management and conservation for the species.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"577 ","pages":"Article 152020"},"PeriodicalIF":2.0,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0022098124000352/pdfft?md5=aded949d11a44d50c526491ab3733fc4&pid=1-s2.0-S0022098124000352-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141068689","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":"Growth stimulation of toxic dinoflagellate Prorocentrum cordatum with herbicide glyphosate","authors":"Natalia Shoman,&nbsp;Ekaterina Solomonova,&nbsp;Arkady Akimov","doi":"10.1016/j.jembe.2024.152017","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152017","url":null,"abstract":"<div><p>Worldwide used glyphosate-based organophosphorus herbicides may be potential phosphorus sources for phytoplankton in coastal waters. In this study, the changes in growth, fluorescent and cytometric parameters of the potentially toxic dinophytic algae <em>Prorocentrum cordatum</em> under the influence of glyphosate of different concentrations were investigated. The effect of glyphosate on the growth dynamics of <em>P. cordatum</em> under conditions of availability and deficiency of inorganic phosphorus in the medium is estimated. Results showed that <em>P. cordatum</em> could grow due to glyphosate as the only source of phosphorus. The final density of the culture was higher than that of the control (without glyphosate) by 22–136% depending on the applied herbicide concentration. Glyphosate stimulated the growth of microalgae, which was observed in increasing the efficiency of the photosynthetic apparatus of cells and their enzymatic (esterase) activity. <em>P. cordatum</em> used glyphosate as a source of phosphorus only when there was a deficiency in inorganic phosphorus, but it was also susceptible to the herbicide when there was inorganic phosphorus present in the medium. An increase of glyphosate concentration in coastal waters may lead to a change in the species structure of natural biocenoses and increase in the number of potentially harmful species.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"577 ","pages":"Article 152017"},"PeriodicalIF":2.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140947667","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":"Phenotypic plasticity drives seasonal thermal tolerance in a Baltic copepod","authors":"Alexandra Hahn,&nbsp;Reid S. Brennan","doi":"10.1016/j.jembe.2024.152014","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152014","url":null,"abstract":"<div><p>Seasonal changes in environmental conditions require substantial physiological responses for population persistence. Phenotypic plasticity is a common mechanism to tolerate these changes, but for organisms with short generation times rapid adaptation may also be a contributing factor. Here, we used a common garden design (11 °C and 18 °C) to disentangle the impacts of adaptation from phenotypic plasticity on thermal tolerance of the calanoid copepod <em>Acartia hudsonica</em> collected throughout spring and summer of a single year. <em>Acartia hudsonica</em> were collected from five time points across the season and thermal tolerance was determined using critical thermal maximum <span><math><mfenced><msub><mi>CT</mi><mi>max</mi></msub></mfenced></math></span> followed by additional measurements after one generation of common garden. As sea surface temperature increased through the season, field collected individuals showed corresponding increases in thermal tolerance but decreases in body size. Despite different thermal tolerances of wild collections, after one generation of common garden animals did not differ in <span><math><msub><mi>CT</mi><mi>max</mi></msub></math></span> within thermal treatments. Instead, there was evidence of phenotypic plasticity where higher temperatures were tolerated by the 18 °C versus the 11 °C treatment animals across all collections. Despite persisting differences between collections due to either adaptation or parental effects, acclimation also had significant effects on body size, with the warm treatment resulting in smaller individuals, consistent with the temperature size rule. Therefore, the differences in thermal tolerance and body size observed in field collected <em>A. hudsonica</em> were predominantly driven by plasticity rather than adaptation. However, the observed decrease in body size suggests that nutrient availability for higher trophic levels and ecosystem functioning could be impacted if temperatures consistently increase with no change in copepod abundance. This is the first record of <em>A. hudsonica</em> in the Baltic Sea known to the authors.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"576 ","pages":"Article 152014"},"PeriodicalIF":2.0,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0022098124000297/pdfft?md5=da962604f0055b7af04e7c054ac2764a&pid=1-s2.0-S0022098124000297-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140905408","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":"Effects of glacial discharge on thallus condition of northern rockweed (Fucus distichus) in the Gulf of Alaska","authors":"Michael A. Kim ,&nbsp;Katrin Iken","doi":"10.1016/j.jembe.2024.152019","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152019","url":null,"abstract":"<div><p>Glacial melt due to climate warming is expected to accelerate in high-latitude ecosystems, necessitating an understanding of how this may influence foundation species in coastal systems. The goal of this study was to use a gradient of glaciation along five watersheds in a south-central Alaskan fjord to investigate the relationship between downstream effects of glacial cover and the thallus condition of the habitat-building rockweed, <em>Fucus distichus</em>. We used compositional and biochemical data from <em>F. distichus</em> thallus samples collected across six months from all five watershed sites and related them to nearshore environmental data taken at each month and site. Most thallus condition metrics changed more related to sampling month than watershed glacial cover, with most metrics decreasing over the sampling period. This was possibly related to the build-up of more structural materials such as cell wall and other chemical structural elements during later-season growth. Lipid content was the only metric that differed systematically by watershed glacial cover, with lower lipid content at the sites with higher glacial cover and assumed higher glacial discharge of the watershed. Most thallus condition metrics were related to water temperature, with the increase during the sampling period reflecting a seasonal warming rather than an influence of increased glacial discharge in the summer. Less effects were seen from lower salinity and higher turbidity in the summer related to seasonally increased glacial discharge. These results indicate that <em>F. distichus</em> is tolerant to the currently experienced range of environmental conditions in glacial watersheds, at least during the sampling years. Possible effects of increasing glacial discharge conditions on other <em>F. distichus</em> life stages (e.g., zygotes) that are vital to maintain genetically diverse populations, or the ability of this species to maintain high primary production and provide habitat and high-quality food for coastal consumers under increasing melt or warming conditions, remain uncertain.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"576 ","pages":"Article 152019"},"PeriodicalIF":2.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140893407","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":"Biomarker responses of Mediterranean mussels (Mytilus galloprovincialis, Lamarck 1819) regarding marine mucilage in the Sea of Marmara","authors":"Eda Dagsuyu ,&nbsp;İdil Can Tunçelli ,&nbsp;Refiye Yanardag ,&nbsp;Nuray Erkan ,&nbsp;Özkan Özden ,&nbsp;Didem Üçok ,&nbsp;Şehnaz Yasemin Tosun ,&nbsp;Hande Doğruyol ,&nbsp;Şafak Ulusoy ,&nbsp;Sühendan Mol","doi":"10.1016/j.jembe.2024.152018","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152018","url":null,"abstract":"<div><p>It has been proposed that marine mucilage intensifies the biological effects of chemical pollutants and can increase their bioaccumulation in seafood. Indeed, in 2021, mucilage caused a major environmental disaster in the Sea of Marmara. Limited resources on the possible effects of marine mucilage on sustainable food security have increased the importance of this study. The aim of this study is to investigate the biochemical effects of mucilage in wild and cultured mussels, a bioindicator species collected from four different regions [Istanbul Strait (S1) and Canakkale Strait (S2), Bandirma (S3), Gelibolu (S4)] during the 2021 fishing season in the Sea of Marmara. The levels of reduced glutathione and lipid peroxidation, activities of antioxidant enzymes like glutathione reductase, glutathione-S-transferase, catalase, superoxide dismutase, activities of biomarker enzymes like alanine aminotransferase, aspartate aminotransferase, and lactate dehydrogenase activities were determined. Our findings demonstrated that mucilage had an impact on cellular oxidative state and compromised the lipid cell membranes in the mantle tissues of Mediterranean mussels (<em>Mytilus galloprovincialis,</em> Lamarck 1819). It was found that there is a high positive relationship between seawater temperatures and bioparameters in S2 and S3 regions, except for GSH level. This study puts forward that in the presence of marine mucilage the biological responses and the state of health of mussels are negatively affected. Parameters which exhibit this kind of response may be used as biomarkers of exposure to marine mucilage in wild and culture mussel populations. Environmental disasters such as marine mucilage naturally affect food security by putting the sustainability of these species at risk.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"576 ","pages":"Article 152018"},"PeriodicalIF":2.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140893408","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":"Investigating leatherback surface behavior using a novel tag design and machine learning","authors":"Rick Rogers ,&nbsp;Kate H. Choate ,&nbsp;Leah M. Crowe ,&nbsp;Joshua M. Hatch ,&nbsp;Michael C. James ,&nbsp;Eric Matzen ,&nbsp;Samir H. Patel ,&nbsp;Christopher R. Sasso ,&nbsp;Liese A. Siemann ,&nbsp;Heather L. Haas","doi":"10.1016/j.jembe.2024.152012","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152012","url":null,"abstract":"<div><p>Understanding the surfacing behavior of marine wildlife is an important component for improving abundance estimates derived from visual surveys. We monitored the behavior of 18 leatherback sea turtles (<em>Dermochelys coriacea</em>) in coastal habitats off Massachusetts, USA, using a high-resolution camera and satellite tag package (HiCAS - High Resolution Camera and Satellite) that we assembled from commercially available components which work independently. We used nine data streams derived from the multiple sensors and a video camera to explore four different depth thresholds defining surface zones. We compared classification of video images by a human to classification of those images by a machine learning algorithm. We calculated four metrics to describe surface behavior for each of the nine data streams. The mean percent time at the surface was the only behavior metric that changed systematically as data streams were used to assess different visible depth thresholds, increasing as the depth threshold increased. Other behavior metrics (mean surface duration, mean dive duration and number of surfacing events per hour) were less similar across data streams, making them unreliable for estimating surface availability. This study highlights the need for sustained data collection to better inform the availability bias estimates used to calculate abundance from visual observations.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"576 ","pages":"Article 152012"},"PeriodicalIF":2.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0022098124000273/pdfft?md5=de21e26d2a916a84e2b7e1291376dfdb&pid=1-s2.0-S0022098124000273-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140879344","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":"3D printed plant-based biodegradable materials as alternative for PVC panels in monitoring coastal marine communities","authors":"Maria Rosa ,&nbsp;Tristan Ene ,&nbsp;Grace Robinson ,&nbsp;Mitchell Lockwood ,&nbsp;Nicolette Scola ,&nbsp;Gerard D. Gadigian ,&nbsp;Taegan A. McMahon","doi":"10.1016/j.jembe.2024.152015","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152015","url":null,"abstract":"<div><p>Coastal marine environments are some of the most productive and overexploited ecosystems on earth. Coastal ecosystems, like oyster and coral reefs, need physical structures to establish and habitat destruction has led to the destabilization of reef structures resulting in massive biodiversity losses. For decades, researchers have utilized PolyVinyl Chloride (PVC) panels as artificial larval settlement panels to study recruitment and community dynamics in these incredibly important ecosystems. Unfortunately, PVC itself is relatively toxic, the panels are smooth which makes it difficult for larval settlement, and it can take months to see establishment because larvae need settlement cues on PVC from biofilm development. This study assessed the use of 3D printed panels constructed out of plant-based biodegradable materials as an alternative to PVC panels. Panels constructed of three different corn-based polylactic acid (PLA) materials (white impact modified, gray impact modified, wood pulp) were tested at a well monitored site along the Long Island Sound in Connecticut, US. Overall, the 3D printed panels had equal or higher recruitment compared to the PVC panels. Beyond the normal application of panels for ecological assessment of local settlement, this work highlights that using innovative, biodegradable panels has strong potential in reestablishing these overburdened yet critical ecosystems. Additionally, the 3D printed panels were economically beneficial to use, which increases equity in this conservation crisis field as material expense can be cost prohibitive.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"576 ","pages":"Article 152015"},"PeriodicalIF":2.0,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140879321","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 ecosystem engineering effects differ by seagrass life stage and density of bioturbating shrimp","authors":"Wesley W. Hull,&nbsp;Jennifer L. Ruesink","doi":"10.1016/j.jembe.2024.152016","DOIUrl":"https://doi.org/10.1016/j.jembe.2024.152016","url":null,"abstract":"<div><p>Because ecosystem engineers shape environmental conditions, interactions between ecosystem engineers can depend not only on the external environment but on “which species arrives when” within habitats. Yet, while endpoint outcomes for adults at high density have often been investigated, few studies have examined how these interactions change across density and life history stages. We tested for antagonistic engineering effects of the burrowing shrimp <em>Neotrypaea californiensis</em> (Dana, 1852) at a range of densities on eelgrass <em>Zostera marina</em> L.<em>,</em> 1753, including seedlings as well as vegetative shoots. In an observational study, abrupt borders of eelgrass beds were not mirrored by shrimp, and shrimp were never excluded across the full range of observed eelgrass densities, patterns that are inconsistent with alternative stable states. However, eelgrass density declined with increasing shrimp density, and no eelgrass occurred at &gt;336 shrimp m⁻². Survival of eelgrass transplants also declined with increasing shrimp density, and in a manipulative experiment, seedlings declined more rapidly than vegetative shoots within a shrimp bed. Thus, shrimp have strong antagonistic engineering effects on eelgrass that increase with shrimp density and can preclude successful seedling establishment and persistence of vegetative shoots.</p></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"576 ","pages":"Article 152016"},"PeriodicalIF":2.0,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140822447","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}