Journal of Experimental Marine Biology and Ecology最新文献_第2页

Linking early diving proficiency from maternal behavior adjustment in Weddell seals: Insights from mother-pup pairs at Terra Nova Bay, Ross Sea, Antarctica 威德尔海豹的早期潜水能力与母亲的行为调整之间的联系：来自南极罗斯海特拉诺瓦湾的母子对的见解

IF 1.8 3区生物学

Journal of Experimental Marine Biology and Ecology Pub Date : 2026-02-01 Epub Date: 2026-02-04 DOI: 10.1016/j.jembe.2026.152170

Younggeun Oh , Youmin Kim , Jeong-Hoon Kim , Jong-U Kim

{"title":"Linking early diving proficiency from maternal behavior adjustment in Weddell seals: Insights from mother-pup pairs at Terra Nova Bay, Ross Sea, Antarctica","authors":"Younggeun Oh , Youmin Kim , Jeong-Hoon Kim , Jong-U Kim","doi":"10.1016/j.jembe.2026.152170","DOIUrl":"10.1016/j.jembe.2026.152170","url":null,"abstract":"<div><div>Weddell seal (<em>Leptonychotes weddellii</em>) pups undergo rapid growth and learn critical diving skills for independent survival during the lactation period. We investigated the diving behavior of Weddell seal mother-pup pairs using time-depth recorders during the early breeding seasons of November 2022 and 2023 in Terra Nova Bay, Ross Sea, Antarctica. A total of 7297 dives were recorded from 17 mother-pup pairs. Overall, mothers performed significantly longer and deeper dives than pups, whereas post-dive surface recovery times were similar between mothers and pups. In contrast, when comparing paired dives between mothers and pups, they exhibited similar dive durations and maximum depths. Notable similarities in the temporal patterns of dive frequency were observed between mothers and pups with peak diving frequencies. In addition, dive durations and maximum depths got progressively increased in both mothers and pups, and this pattern indicated that pups showed gradual improvement in their diving capacity. Notably, mothers engaged in more foraging dives during solo dives, which were significantly deeper and longer than paired dives. The results of our study suggest that mothers adjust their diving behavior to support pup development through synchronized diving, while maintaining their own foraging needs through opportunistic solo dives. This study highlights a mixed capital–income breeding strategy that demonstrates a trade-off between maternal behavior adjustment and self-maintenance in nursing mothers. Our results provide early diving development in Weddell seals and the ecological role of synchronized diving behavior in mother-pup pairs.</div></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"595 ","pages":"Article 152170"},"PeriodicalIF":1.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146189691","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}

引用次数: 0

Comment on “Toxic impact of aluminium on the natural phytoplankton community during spring in the Atlantic sector of the Southern Ocean” 评议“铝对南大洋大西洋区春季天然浮游植物群落的毒性影响”

IF 1.8 3区生物学

Journal of Experimental Marine Biology and Ecology Pub Date : 2026-02-01 Epub Date: 2026-01-09 DOI: 10.1016/j.jembe.2026.152161

Linbin Zhou , Fengjie Liu , Claude Fortin , Yehui Tan

引用次数: 0

Relative importance of top-down and bottom-up controls influencing Turbinaria ornata biomass varies with depth 自上而下和自下而上控制对鸟Turbinaria ornata生物量影响的相对重要性随深度而变化

IF 1.8 3区生物学

Journal of Experimental Marine Biology and Ecology Pub Date : 2026-02-01 Epub Date: 2026-01-10 DOI: 10.1016/j.jembe.2026.152162

Sarah Joy Bittick , Caitlin R. Fong , Christopher A. Leber , Erin Duffy , Peggy Fong

{"title":"Relative importance of top-down and bottom-up controls influencing Turbinaria ornata biomass varies with depth","authors":"Sarah Joy Bittick , Caitlin R. Fong , Christopher A. Leber , Erin Duffy , Peggy Fong","doi":"10.1016/j.jembe.2026.152162","DOIUrl":"10.1016/j.jembe.2026.152162","url":null,"abstract":"<div><div>Tropical reefs have experienced declines in coral due to multiple human-caused stressors, often leading to algal domination. The stability of these emergent algal communities is influenced by anthropogenic changes to top-down control by herbivory and bottom-up control by nutrient availability. In the South Pacific, <em>Turbinaria ornata</em> has increased in abundance since the 1980s, particularly in shallow areas of the reef, likely in response to alterations of these controlling forces. We investigated whether herbivory, nutrient availability, habitat depth, and/or their interactions influence growth and physical defenses (toughness) of small (<3 cm) <em>T. ornata</em> as this stage is likely most vulnerable to alterations to these factors. To determine whether nutrient availability and herbivory impact <em>T. ornata</em> biomass and toughness differentially at two habitat depths, we conducted a transplant experiment manipulating nutrients (+/− Nutrients) and herbivory (+/− Cages), in both the shallow (0.25 m–1 m depth) <em>Turbinaria</em>-dominated crest of a fringing reef and below this zone (2.5 m–4 m depth) where <em>Turbinaria</em> was naturally absent. We used Aikake Information Criterion (AICc) to select generalized linear mixed models (GLMM) that best fit the experimental data. Herbivory strongly controlled biomass accumulation of <em>T. ornata</em> in the deeper but not the shallower zone, while cages that eliminated herbivores reduced thallus toughness but only in the shallow zone. In contrast, nutrients increased thallus toughness across all depths and herbivory treatments. Our results indicate that human impacts that reduce control by herbivores and/or nutrients may stabilize <em>T. ornata</em> populations, providing one possible mechanism for its recent range and habitat expansion.</div></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"595 ","pages":"Article 152162"},"PeriodicalIF":1.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145941387","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}

引用次数: 0

The predation potential of the Japanese spiny lobster Panulirus japonicus towards sea urchins in relation to lobster size and urchin type 日本龙虾对海胆的捕食潜力与龙虾大小和海胆类型的关系

IF 1.8 3区生物学

Journal of Experimental Marine Biology and Ecology Pub Date : 2026-02-01 Epub Date: 2026-01-13 DOI: 10.1016/j.jembe.2026.152163

Shoju Shi , Reiji Masuda

{"title":"The predation potential of the Japanese spiny lobster Panulirus japonicus towards sea urchins in relation to lobster size and urchin type","authors":"Shoju Shi , Reiji Masuda","doi":"10.1016/j.jembe.2026.152163","DOIUrl":"10.1016/j.jembe.2026.152163","url":null,"abstract":"<div><div>Predation by the spiny lobsters (family Palinuridae) on sea urchins may help conserve seaweed beds. Here, we conducted tank experiments to demonstrate that the predation on urchins by the Japanese spiny lobster <em>Panulirus japonicus</em> depends on the size and type of prey. When presented with the urchin <em>Heliocidaris crassispina</em>, large lobsters (carapace length ≥ 90 mm) predated more urchins compared to their smaller counterparts. The long-spined sea urchin <em>Diadema</em> spp. was occasionally predated by large lobsters, which would pulverize the tests. Underwater camera observations revealed that the predation behaviors of lobsters involved rolling the urchin, cutting the spines, perforating the oral aperture, and pulverizing the test. We further investigated the effect on predation by trimming the spines of <em>Diadema</em> spp. When intact and trimmed urchins were presented alternately, trimmed urchins were predated more often, suggesting interference by their long spines. We also compared physical traits of 3 urchin species: <em>H. crassispina</em>, <em>Diadema</em> spp., and <em>Echinometra</em> sp. A potentially accountable for the predation. The large oral aperture and short spines of <em>Echinometra</em> sp. A may facilitate perforation, smaller oral apertures of <em>H. crassispina</em> may promote pulverization, and the long spines of <em>Diadema</em> spp. may prevent predation altogether. We concluded that large lobsters are active predators of urchins when kept in aquaria, thus should be targeted for conservation to protect seaweed beds. Moreover, predation patterns varied based on urchin size and species, suggesting that the success of predators may be influenced by specific types of urchins available in the habitat.</div></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"595 ","pages":"Article 152163"},"PeriodicalIF":1.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981646","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}

引用次数: 0

A multi-method assessment of elasmobranch diversity and abundance in the southern Red Sea 红海南部板鳃纲多样性和丰度的多方法评价

IF 1.8 3区生物学

Journal of Experimental Marine Biology and Ecology Pub Date : 2026-01-01 Epub Date: 2025-12-22 DOI: 10.1016/j.jembe.2025.152159

Eloise B. Richardson , Eva Aylagas , Laura Gajdzik , Royale S. Hardenstine , Jesse E.M. Cochran , Stephania Palacios-Narváez , Carolina Bocanegra-Castano , Chakkiath Paul Antony , Michael L. Berumen

{"title":"A multi-method assessment of elasmobranch diversity and abundance in the southern Red Sea","authors":"Eloise B. Richardson , Eva Aylagas , Laura Gajdzik , Royale S. Hardenstine , Jesse E.M. Cochran , Stephania Palacios-Narváez , Carolina Bocanegra-Castano , Chakkiath Paul Antony , Michael L. Berumen","doi":"10.1016/j.jembe.2025.152159","DOIUrl":"10.1016/j.jembe.2025.152159","url":null,"abstract":"<div><div>Elasmobranchs (sharks and rays) are vital to marine ecosystems as predators exerting top-down control on lower trophic levels. Unfortunately, they are also among the most threatened vertebrate taxa, with vulnerability compounded for many species by limited actionable data. Localised species distributions and community compositions are poorly known, and baseline assessments may be biassed by the limitations of individual methodologies. Here we adopt a multi-method approach to assess elasmobranchs diversity estimates from baited remote underwater video systems (BRUVS), unoccupied aerial vehicle surveys (UAVS), and environmental DNA (eDNA), from a two-week survey of five islands in the southern Red Sea. Species richness and relative abundance (i.e., cumulative maximum number of species (MaxN) for the video surveys; relative read counts for the eDNA) were compared across methodologies. A total of 11 species of elasmobranchs were detected, with BRUVS identifying the most species (7) but lower relative abundances (27 cumulative MaxN) than UAVS (6 species, 31 cumulative MaxN). A total of five elasmobranch species were detected from 10,385 amplicon sequence variants in eDNA samples. Differences among methods reflected biases and limitations that could be mitigated adopting an integrative approach. Time- and cost-efficiency analyses showed that eDNA surveys required minimal field effort compared to visual surveys but involved greater post-field processing time. Yet, this method yields potential for larger datasets. Overall, these findings provide a foundation for facilitating top-predator assessments suggesting that multi-method surveys may offer a more holistic approach while not substantially extending the field time required to complete the survey.</div></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"594 ","pages":"Article 152159"},"PeriodicalIF":1.8,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839746","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}

引用次数: 0

Ocean acidification reduces juvenile snow crab, Chionoecetes opilio, survival but does not affect growth or morphometrics 海洋酸化降低了幼雪蟹（Chionoecetes opilio）的存活率，但不影响其生长或形态测定

IF 1.8 3区生物学

Journal of Experimental Marine Biology and Ecology Pub Date : 2026-01-01 Epub Date: 2025-12-01 DOI: 10.1016/j.jembe.2025.152153

W. Christopher Long

{"title":"Ocean acidification reduces juvenile snow crab, Chionoecetes opilio, survival but does not affect growth or morphometrics","authors":"W. Christopher Long","doi":"10.1016/j.jembe.2025.152153","DOIUrl":"10.1016/j.jembe.2025.152153","url":null,"abstract":"<div><div>Anthropogenic release of CO<sub>2</sub> and its subsequent dissolution in the oceans results in a decrease in the pH of seawater, known as ocean acidification, which can negatively affect marine organisms. Little is known about the response of snow crab, <em>Chionoecetes opilio</em>, to reduced pH. Juvenile snow crab were captured in the Bering Sea and exposed to three different pH treatments (Ambient (pH ∼7.95), pH 7.8, and pH 7.5) for 396 days at a constant temperature of 4 °C with thirty crabs randomly assigned to each treatment. Crabs were checked daily for molting or mortality. Wet mass and carapace morphometrics were measured after every molt. Reduced pH did not affect the intermolt duration, the carapace width after each molt, or wet mass of the crabs after each molt, giving no indication that growth rate was changed by reduced pH. There also was no change in morphometrics caused by reduced pH. However, the mortality rate of crabs held at pH 7.5 was 40 % higher than those held at pH 7.8 or Ambient. Such a substantial increase in mortality without accompanying sublethal effects is surprising; individuals susceptible to reduced pH might have died early in the experiment, or that differences in growth rate might have become apparent with longer exposure. Regardless, juvenile snow crab are somewhat sensitive to ocean acidification, although, consistent with studies at other life-history stages, snow crab may be more resistant to changes in pH than other Alaska crab species.</div></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"594 ","pages":"Article 152153"},"PeriodicalIF":1.8,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145684726","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}

引用次数: 0

Effects of multiple paternity on immediate reproductive and hatchling outcomes for loggerhead turtles (Caretta caretta) nesting at Yakushima Island, Japan: a common beach hatchery experiment 多父性对日本屋久岛红海龟（Caretta Caretta）筑巢的直接繁殖和孵化结果的影响：一个常见的海滩孵化场实验

IF 1.8 3区生物学

Journal of Experimental Marine Biology and Ecology Pub Date : 2026-01-01 Epub Date: 2025-12-08 DOI: 10.1016/j.jembe.2025.152154

Hideo Hatase

{"title":"Effects of multiple paternity on immediate reproductive and hatchling outcomes for loggerhead turtles (Caretta caretta) nesting at Yakushima Island, Japan: a common beach hatchery experiment","authors":"Hideo Hatase","doi":"10.1016/j.jembe.2025.152154","DOIUrl":"10.1016/j.jembe.2025.152154","url":null,"abstract":"<div><div>Polyandry, where a female mates with multiple males, sometimes results in multiple paternity, the presence of several sires within a single brood, and is observed across various taxa. The potential benefits of this phenomenon for female sea turtles are a subject of ongoing discussion. This research aimed to determine if the reproductive and hatchling traits of loggerhead turtles (<em>Caretta caretta</em>) are enhanced by a greater number of sires estimated per clutch. Clutches were incubated at a common beach hatchery in Yakushima Island, Japan, in two separate nesting seasons. Twenty-six or 28 females and their 291 or 401 offspring were genotyped at three or at ≥ three of five microsatellite loci to estimate the number of sires per clutch using two programs, respectively. GERUD estimated 21 singly and five multiply sired clutches, whereas COLONY estimated 15 singly and 13 multiply sired clutches. Although singly sired clutches had significantly higher success of fertilization, hatching, and emergence than multiply sired clutches in the GERUD dataset, opposite trends were shown in COLONY. However, the estimated number of sires per clutch was not significantly correlated to these three parameters in both programs. Female straight carapace length, clutch size, and means and variation for hatchling morphology were not significantly different between singly and multiply sired clutches and were not significantly correlated to the estimated number of sires per clutch in both programs. These results suggest that female loggerheads in this rookery do not gain direct and indirect genetic benefits immediately from multiple paternity.</div></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"594 ","pages":"Article 152154"},"PeriodicalIF":1.8,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145736863","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}

引用次数: 0

Metabolic rate and tolerance to hypoxia in the harpacticoid copepod Amphiascoides atopus 棘足类桡足类阿托坡角鱼的代谢率和对缺氧的耐受性

IF 1.8 3区生物学

Journal of Experimental Marine Biology and Ecology Pub Date : 2026-01-01 Epub Date: 2025-11-20 DOI: 10.1016/j.jembe.2025.152151

Aarón García-Bernal , Jorge Arturo Vargas-Abúndez , Raúl Llera-Herrera , Ilie S. Racotta , Carlos Rosas

{"title":"Metabolic rate and tolerance to hypoxia in the harpacticoid copepod Amphiascoides atopus","authors":"Aarón García-Bernal , Jorge Arturo Vargas-Abúndez , Raúl Llera-Herrera , Ilie S. Racotta , Carlos Rosas","doi":"10.1016/j.jembe.2025.152151","DOIUrl":"10.1016/j.jembe.2025.152151","url":null,"abstract":"<div><div>Harpacticoid copepods are key components of the meiofauna in nearly all benthic ecosystems, commonly characterized by a low availability of dissolved oxygen (DO). Harpacticoids exhibit a functional loss of Hypoxia Inducible Factor (HIF), and their ability to tolerate and respond to hypoxic conditions has been studied in the tidal-pool genus <em>Tigriopus</em>, but not in harpacticoids inhabiting other ecosystems. To improve our understanding of the metabolic pathways used by harpacticoid copepods to survive in low-oxygen environments, we measured the metabolic rate and established the critical oxygen pressure (<em>P</em><sub>crit</sub>) in <em>Amphiascoides atopus</em> using flow-through respirometry along a DO gradient. Our results indicate that <em>A. atopus</em> switched from oxyregulating to oxyconforming behavior at a <em>P</em><sub>crit</sub> of 10.5 kPa. Below a DO concentration of 5.9 kPa, the metabolic rate of <em>A. atopus</em> was undetectable in 72 % of the cases, indicating a probable switch to anaerobic metabolism. Additionally, we performed a survival assay at experimental DO concentrations of 20.8 kPa,7.8 kPa, and 3.1 kPa, and anoxia at DO levels <0.92 kPa. Survival rate after 96 h was 100 % under the two hypoxic conditions and 25 % under anoxia. Finally, we compared the temperature-dependent metabolic rates between harpacticoids (w/o functional HIF) and calanoids (with functional HIF). The differences between the two groups were mainly driven by temperature, as studies in harpacticoids have generally been conducted at higher temperatures, as in the present study.</div></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"594 ","pages":"Article 152151"},"PeriodicalIF":1.8,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145580012","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}

引用次数: 0

Sink and swim: Tracking submergence patterns and anomalous behavior in sea turtles 下沉和游泳：追踪海龟的水下模式和异常行为

IF 1.8 3区生物学

Journal of Experimental Marine Biology and Ecology Pub Date : 2026-01-01 Epub Date: 2025-12-15 DOI: 10.1016/j.jembe.2025.152156

Shir Sassoon , Dan Tchernov , Yaniv Levy

{"title":"Sink and swim: Tracking submergence patterns and anomalous behavior in sea turtles","authors":"Shir Sassoon , Dan Tchernov , Yaniv Levy","doi":"10.1016/j.jembe.2025.152156","DOIUrl":"10.1016/j.jembe.2025.152156","url":null,"abstract":"<div><div>Sea turtle rehabilitation efforts face challenges in evaluating the long-term success and ecological impact of released individuals. This study presents an integrated analytical approach to study submergence behavior using satellite tracking data. We analyzed data from Wet/Dry sensors embedded into the widely used Wildlife Computers' SPOT-6 satellite transmitters to examine patterns of surfacing and diving. Post-release acclimatization was assessed through submergence behavior in rehabilitated turtles (<em>n</em> = 55), with nesting females (<em>n</em> = 12) and published data as a healthy reference group. Among the predictors tested–species, sex, life stage, injury category, and season–only season significantly explained submergence, with air exposure lowest in winter (3.7 %) and highest in summer (5.9 %), a pattern consistent with seasonal changes in ectothermic physiology. Rehabilitated turtles were generally comparable to nesting females, exhibiting even fewer “outlier days”, days with unusually high air exposure (median ratio 0 % vs. 1 %, <em>p</em> = 0.026). Seven rehabilitated individuals were classified as outliers, displaying atypical submergence behavior and irregular movement patterns indicating potential buoyancy issues. This methodology enables the inclusion of rehabilitated individuals, after testing their behavior, into tagging studies, reducing the risk of misinterpreting abnormal behavior as natural. Our findings indicate that post-rehabilitation, turtles display distinct movement and submergence patterns consistent with physiological recovery and adaptation to the wild. These results highlight the importance of post-release monitoring for evaluating individual variation, survival prospects, and the effectiveness of rehabilitation programs. Overall, this approach advances understanding of sea turtle reintroduction outcomes and can help inform and refine conservation strategies.</div></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"594 ","pages":"Article 152156"},"PeriodicalIF":1.8,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145790134","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}

引用次数: 0

Bottom-up and top-down effects on the epiphytic diatom communities of the seagrass Zostera noltei H. 自下而上和自上而下对海草附生硅藻群落的影响。

IF 1.8 3区生物学

Journal of Experimental Marine Biology and Ecology Pub Date : 2026-01-01 Epub Date: 2025-11-17 DOI: 10.1016/j.jembe.2025.152147

Vanessa C. Da Rosa , Margareth S. Copertino , Rui Santos , Begoña Martínez-Crego

{"title":"Bottom-up and top-down effects on the epiphytic diatom communities of the seagrass Zostera noltei H.","authors":"Vanessa C. Da Rosa , Margareth S. Copertino , Rui Santos , Begoña Martínez-Crego","doi":"10.1016/j.jembe.2025.152147","DOIUrl":"10.1016/j.jembe.2025.152147","url":null,"abstract":"<div><div>Diatoms are key components of the epiphytic community growing on seagrass meadows, which play important ecological functions such as increasing habitat complexity and providing food for herbivores. Excess nutrients are widely recognized as major drivers of decline in seagrass meadows worldwide, promoting blooms of opportunistic epiphytes and causing negative effects on vegetation. Herbivory is often reported to exert a top-down control on the epiphytic biomass that proliferate under nutrient enrichment. Little is known about the effects of herbivory or herbivory-nutrient interactions on the structure of diatom communities. Here, we conducted a 3-weeks mesocosm experiment to examine the independent and interactive effects of bottom-up (nutrient enrichment) and top-down (herbivory by the gastropod <em>Steromphala umbilicalis</em>) controls on epiphytic diatom communities growing on <em>Zostera noltei</em> leaves, as well as on plant morphological traits. Nutrient enrichment alone increased the epiphytic autotrophic biomass and altered the composition and structure of diatom communities but had no effect on other univariate diatom metrics. Herbivory alone reduced the epiphyte biomass by 27 %, species richness by 13 %, and diversity by 10 %, through selective feeding on less abundant species such as <em>Grammatophora marina,</em> which disappeared under herbivory. Our findings contrast with previous studies showing that grazers often limit the abundance of dominant species and offset the increase of species stimulated by nutrient enrichment. This likely explains the absence of nutrient-herbivory interactions in our study. Overall, our results highlight the value of epiphytic diatoms as early-warning indicators of environmental change, as they appear more sensitive and responsive than seagrass morphological traits.</div></div>","PeriodicalId":50197,"journal":{"name":"Journal of Experimental Marine Biology and Ecology","volume":"594 ","pages":"Article 152147"},"PeriodicalIF":1.8,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145532980","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}

引用次数: 0