Marine environmental research最新文献_第6页

Examining ingested microplastics in fish: Considerations on filter pore size, analysis time, and material costs to design cost-effective projects 检查鱼类摄入的微塑料：考虑过滤孔径、分析时间和材料成本，设计具有成本效益的项目

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2024-10-11 DOI: 10.1016/j.marenvres.2024.106785

Caitlin Brawn , Bonnie M. Hamilton , Matthew S. Savoca , Mark L. Mallory , Jennifer F. Provencher

In recent years the microplastics research community has called for methods harmonization and standardized metrics of reporting microplastic attributes. While alignment of research practices is essential in obtaining robust microplastic data, resource managers need to balance how the cost and effort of methodologies compare to data output. The intention of this study is to compare two recommended methods for isolating anthropogenic microparticles in fish gastrointestinal tracts. Using Icelandic capelin (Mallotus villosus) as a study species, with potassium hydroxide (KOH) digestion, we compared a 1.2 μm filtration and 45 μm sieving protocols for isolating ingested anthropogenic microparticles. We compared methods based on the amount of time they took to conduct, the cost of the materials and equipment required, levels of procedural contamination, and data output. We found no significant differences in the materials costs or procedural contamination between the two methods. However, the two protocols resulted in anthropogenic microparticles with significantly different characteristics (i.e. colour, length, morphology), and the 45 μm sieving protocol took longer to conduct per sample. Our results contribute towards a more holistic understanding of microplastic research methods, their relative costs, and how they contribute to data outputs and development of large-scale monitoring programs.

近年来，微塑料研究界呼吁统一微塑料属性的报告方法和标准化指标。虽然统一研究方法对于获得可靠的微塑料数据至关重要，但资源管理者需要平衡方法的成本和工作量与数据产出之间的关系。本研究的目的是比较两种用于分离鱼类胃肠道中人为微颗粒的推荐方法。以冰岛毛鳞鱼（Mallotus villosus）为研究对象，通过氢氧化钾（KOH）消化，我们比较了 1.2 μm 过滤和 45 μm 筛选方案，以分离摄入的人为微颗粒。我们根据这些方法所需的时间、所需材料和设备的成本、程序污染程度以及数据输出进行了比较。我们发现，两种方法在材料成本或程序污染方面没有明显差异。但是，这两种方法产生的人为微颗粒的特征（如颜色、长度、形态）明显不同，而且 45 μm 筛选方法每个样本所需的时间更长。我们的研究结果有助于更全面地了解微塑料研究方法、其相对成本，以及它们如何促进数据输出和大规模监测计划的发展。

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引用次数: 0

Seasonal impacts of Kuroshio intrusion on pico-phytoplankton dynamics near the Changjiang River estuary 黑潮入侵对长江口附近微浮游植物动态的季节性影响

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2024-10-11 DOI: 10.1016/j.marenvres.2024.106789

Yue Zhao , Ren-Cheng Yu , Fan-Zhou Kong , Xiao-Yu Li , Jin-Xiu Wang

The strong western Pacific boundary current of the Kuroshio significantly affects the oceanographic and ecological processes of the East China Sea through its branches. To understand the seasonal variation of Kuroshio intrusion and its ecological effects, 10 cruises were conducted from February 2015 to January 2016 in the waters adjacent to the Changjiang River estuary to collect hydrological data and abundances of phytoplankton assemblages of Prochlorococcus (Pro), Synechococcus (Syn) and picoeukaryotes. High salinity bottom water representing the Nearshore Kuroshio Branch Current (NKBC) appeared in the spring, peaked in the summer, and then almost disappeared at the end of the autumn. During this period, the seasonal variations of Pro and Syn subgroup with lower orange fluorescence (dim type Syn) abundances correlated and synchronized with the intensity of the NKBC intrusion. Water masses analysis further illustrated that the spring was the critical season for NKBC to influence and transport phytoplankton along the pathway to coastal waters. NKBC will further impact the phytoplankton dynamics and ecological processes in this sea area.

强大的西太平洋边界流黑潮通过其分支对东海的海洋学和生态过程产生重大影响。为了解黑潮入侵的季节变化及其生态效应，2015年2月至2016年1月，在长江口附近海域进行了10次巡航，收集水文数据和浮游植物原绿球藻（Pro）、中链球藻（Syn）和微小核菌的丰度。代表近岸黑潮支流（NKBC）的高盐度底层水在春季出现，夏季达到高峰，秋末几乎消失。在此期间，橙色荧光较弱的 Pro 亚群和 Syn 亚群（暗淡型 Syn）丰度的季节性变化与 NKBC 入侵强度相关并同步。水团分析进一步表明，春季是 NKBC 影响并将浮游植物沿路径迁移到沿岸水域的关键季节。NKBC 将进一步影响该海域的浮游植物动力学和生态过程。

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引用次数: 0

Impact of warming and acidification of the Mediterranean Sea on statolith formation of the scyphozoan jellyfish Rhizostoma pulmo Macri (1778) 地中海变暖和酸化对鞘状水母 Rhizostoma pulmo Macri（1778 年）的石像形成的影响。

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2024-10-11 DOI: 10.1016/j.marenvres.2024.106788

Manuel Jesús León-Cobo , Angélica Enrique-Navarro , Ana Bartual , Laura Prieto

Ocean warming and acidification negatively affect organisms and biogeochemical cycles. To date, emphasis has been placed on the study of the impact on the structures of calcifying species; however, there is limited knowledge about the influence of the increase of these two variables on the solid structures of non-calcifying species as jellyfish. Here, we study the effects that the increase of temperature and acidity would cause on the statoliths of newly released ephyrae of the Mediterranean jellyfish Rhizostoma pulmo. Six combinations of temperature and P_CO2 (18, 24 and 30 °C with a P_CO2 of 500 and 1000 ppm each), according to the projections of the SSP5-8.5 (IPCC, 2021) scenario for the year 2100, were applied during 32 days to different groups of polyps randomly selected. Statoliths of the released ephyrae were counted and their size was measured. Our results show that, even though neither temperature nor P_CO2 increase exerted a representative effect on the amount of statoliths synthesized in newly released ephyra from R. pulmo, it did exert an impact on the size of these structures: warming led to the formation of larger statoliths, while the rise in P_CO2 induced the production of smaller structures. Under the simultaneous increase of both variables, acidification attenuated the effects of temperature, but still slightly larger statoliths were synthesized. The size differences observed in these structures could negatively impact the equilibrium system of this jellyfish species, potentially affecting its ability to survive.

海洋变暖和酸化会对生物和生物地球化学循环产生负面影响。迄今为止，研究重点一直放在对钙化物种结构影响的研究上；然而，对于这两个变量的增加对非钙化物种（如水母）固体结构的影响，我们的了解还很有限。在此，我们研究了温度和酸度的增加对地中海水母 Rhizostoma pulmo 新释放的斑岩的影响。根据 SSP5-8.5（IPCC，2021 年）对 2100 年的预测，在 32 天内对随机选取的不同珊瑚虫组施加了六种温度和 PCO2 组合（18、24 和 30 °C，PCO2 分别为 500 和 1000 ppm）。对释放出的水螅体进行计数并测量其大小。我们的研究结果表明，尽管温度和 PCO2 的升高对 R. pulmo 新释放的水螅中合成的立方体数量都没有代表性的影响，但却对这些结构的大小产生了影响：温度升高会导致形成较大的立方体，而 PCO2 的升高则会导致产生较小的结构。在两个变量同时升高的情况下，酸化削弱了温度的影响，但合成的石柱仍然稍大。在这些结构中观察到的大小差异可能会对该水母物种的平衡系统产生负面影响，从而可能影响其生存能力。

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引用次数: 0

Key environmental parameters and numerical prediction model of jellyfish bloom in Qingchuan Bay Nuclear Power Plant, China 中国青川湾核电站水母水华的关键环境参数和数值预测模型

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2024-10-11 DOI: 10.1016/j.marenvres.2024.106786

Zichun Shen , Wen Fang , Zhenxin Yu , Xiaoyin Chen , Zhiyu Su , Wen Yu , Heshan Lin

In recent years, there has been a notable increase in cooling water intake blockage caused by marine organism blooms at coastal nuclear power plants worldwide, resulting in shutdowns of nuclear power plants and large economic losses. A sizable portion of these incidents were caused by blooms from jellyfish, a planktonic invertebrate with a unique growth pattern. Suitable external conditions are conducive to the rapid growth of jellyfish, and blooms can occur within a few days. In order to better predict jellyfish bloom and enable nuclear power plants to prepare for it in advance, this study explores the numerical relationship between jellyfish biomass and environmental parameters. A series of time windows (evaluation intervals) were defined and constructed by a time-series recursive approach, which solved the problem of poor correlation between jellyfish biomass and environmental parameters at non-bloom points. The optimal time window length D = 10 was obtained, and the key environmental parameters affecting jellyfish biomass were screened as sea surface temperature, salinity, voltage value, dissolved oxygen, and chlorophyll. According to the ADF and KPSS tests, the key parameters have no significant time dependence, which ensures the stability and reliability of the subsequent predictions. The jellyfish bloom prediction model was derived by calculating the score F through the recursive Principal Component Analysis of the key environmental parameter in the time interval preceding the prediction point. The sudden change moments of score F correspond well to the jellyfish bloom moments, and the sudden change moments are all advanced for a period of time compared to the bloom time, which can provide valuable time for the nuclear power plant to organize manpower to deal with the blockage. Finally, a maximum score F threshold model was proposed to be coupled with the jellyfish bloom prediction model to provide a more robust basis for early warning of jellyfish at nuclear power plants.

近年来，全球沿海核电站因海洋生物大量繁殖而导致冷却水进水口堵塞的事件明显增多，造成核电站停运和巨大的经济损失。在这些事故中，有相当一部分是由水母藻引起的，水母藻是一种具有独特生长模式的浮游无脊椎动物。适宜的外部条件有利于水母的快速生长，水母水华可在几天内出现。为了更好地预测水母大量繁殖，使核电站能够提前做好准备，本研究探讨了水母生物量与环境参数之间的数值关系。研究采用时间序列递归方法定义并构建了一系列时间窗（评估区间），解决了水母生物量与非藻华点环境参数相关性差的问题。得到最佳时间窗长度 D = 10，筛选出影响水母生物量的关键环境参数为海面温度、盐度、电压值、溶解氧和叶绿素。根据 ADF 和 KPSS 检验，关键参数没有显著的时间依赖性，保证了后续预测的稳定性和可靠性。水母水华预测模型是通过对预测点前时间间隔内的关键环境参数进行递归主成分分析计算得分 F 得出的。得分 F 的突变时刻与水母水华时刻非常吻合，而且突变时刻都比水母水华时间提前了一段时间，这可以为核电站组织人力处理堵塞提供宝贵的时间。最后，提出了一个最大得分 F 阈值模型，与水母水华预测模型相结合，为核电站水母水华预警提供了更可靠的依据。

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引用次数: 0

Assessment of the growth capacity of newly sprouted shoots of Gelidium corneum (Florideophyceae, Rhodophyta) through field-based experiments 通过田间试验评估角叉菜（花叶植物纲，红叶植物界）新芽的生长能力

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2024-10-11 DOI: 10.1016/j.marenvres.2024.106781

Begoña Sánchez-Astráin, Samuel Sainz-Villegas, Xabier Guinda, Camino Fernández de la Hoz, José A. Juanes

The macrophyte Gelidium corneum (Hudson) J. V. Lamouroux, 1813 plays an important role as an ecosystem engineer on temperate rocky shores on the northeastern Atlantic coast. However, its cover and population biomass have declined in recent decades within the southern Bay of Biscay. This study aimed to identify the environmental thresholds, with respect to seawater temperature and irradiance, that influence the development capacity of newly formed individuals of G. corneum through vegetative reproduction. Therefore, an in situ experiment was conducted at two depths within the range of distribution of this species (5 and 12 m) and at two coastal sites on the north coast of Spain (east and west coasts of the Cantabria region, Spain). Our results revealed that G. corneum apical fragments undergoing vegetative propagation developed many new shoots over a period of sixteen weeks. The temperature and irradiance seemed to contribute to the length reached by the new fronds, whereas the number of recruits remained constant throughout the duration of the experiment. Given the slow growth rate characteristic of this species, the total shoot length in this study reached 2.97 cm, which confirms the gradual and restrained developmental pattern during the early stages of its life. We also quantified bite marks at the tips of the new plants, and more than three-quarters of them presented these signs by the final month of the study. Our study provides valuable insights into the growth process of the endangered species G. corneum through vegetative propagation and elucidates the impact that abiotic and biotic factors can have on its growth.

大型藻类 Gelidium corneum (Hudson) J. V. Lamouroux, 1813 作为生态系统工程师在大西洋东北海岸的温带岩石海岸发挥着重要作用。然而，近几十年来，它在比斯开湾南部的覆盖率和种群生物量都有所下降。本研究旨在确定海水温度和辐照度等环境阈值，这些阈值会通过无性繁殖影响 G. corneum 新形成个体的发育能力。因此，我们在该物种分布范围内的两个深度（5 米和 12 米）以及西班牙北海岸的两个沿海地点（西班牙坎塔布里亚地区的东海岸和西海岸）进行了现场实验。我们的研究结果表明，进行无性繁殖的 G. corneuma 顶端片段在 16 周内长出了许多新芽。温度和辐照度似乎对新叶的长度有影响，而新芽的数量在整个实验期间保持不变。鉴于该物种生长速度缓慢的特点，本研究中的新芽总长度达到了 2.97 厘米，这证实了其生命早期阶段的渐进和抑制性发育模式。我们还对新植株顶端的咬痕进行了量化，超过四分之三的植株在研究的最后一个月出现了这些迹象。我们的研究为了解濒危物种珊瑚虫通过无性繁殖的生长过程提供了宝贵的见解，并阐明了非生物和生物因素对其生长的影响。

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引用次数: 0

Unraveling the risks of nAl2O3 on harmful algal blooms: Insights from paralytic shellfish toxins production of Alexandrium tamarense 揭示 nAl2O3 对有害藻类水华的风险：从 Alexandrium tamarense 产生麻痹性贝类毒素中获得的启示。

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2024-10-11 DOI: 10.1016/j.marenvres.2024.106790

Yuelu Jiang , Wenjing Guo , Manlu Li , Jingshuo Niu , Nan Zeng , Xiaoshan Zhu

As one of the commonly used and cost-effective nanomaterials, nanosized aluminum oxide (nAl₂O₃) posses unique properties and chemical stability. However, its extensive use and resultant dissemination into aquatic ecosystems prompt concerns over the proliferation and repercussions of harmful algal blooms, particularly those caused by dinoflagellates producing toxins. This study investigated the sub-chronic effects of nAl₂O₃ on growth, physiological activities, and paralytic shellfish toxins (PSTs) production in Alexandrium tamarense. Results showed dose-dependent inhibition in growth (EC₅₀ = 20.6 mg L⁻¹), esterase activity, and photosynthetic efficiency (F_v/F_m) during the sub-chronic exposure (13-day). The internalization of nAl₂O₃ in microalgal cells and the significant decrease in the total cellular PSTs content were observed under high nAl₂O₃ concentrations (>40 mg L⁻¹). The study also demonstrated a clear decrease in the content of some derivatives of PSTs (GTX5, C1/2, and GTX2/3) with the increase in nAl₂O₃ concentrations, accompanied by the induction of an unknown derivative. Excessive ROS production, dissolved Al, and physical inhibition were suggested as potential mechanisms for _nAl₂O₃ toxicity and changes in PSTs toxin profile. Overall, this research enhances our understanding of the potentiated risks and threats on the possible concurrent events of toxic dinoflagellate, such as Alexandrium species and nanoparticles in aquatic environments.

纳米氧化铝（nAl2O3）是常用且具有成本效益的纳米材料之一，具有独特的性能和化学稳定性。然而，纳米氧化铝的广泛使用及其在水生生态系统中的传播引发了人们对有害藻类水华（尤其是由产生毒素的甲藻引起的藻类水华）的扩散和影响的担忧。本研究调查了 nAl2O3 对 Alexandrium tamarense 的生长、生理活性和麻痹性贝类毒素（PSTs）产生的亚慢性影响。结果表明，在亚慢性暴露（13 天）期间，生长（EC50 = 20.6 mg L-1）、酯酶活性和光合效率（Fv/Fm）受到剂量依赖性抑制。在高浓度 nAl2O3（大于 40 毫克/升）条件下，观察到 nAl2O3 在微藻细胞中的内化以及细胞中 PSTs 总含量的显著下降。研究还表明，随着 nAl2O3 浓度的增加，PSTs 某些衍生物（GTX5、C1/2 和 GTX2/3）的含量明显减少，同时还诱导出一种未知衍生物。过多的 ROS 生成、溶解的铝和物理抑制被认为是 nAl2O3 毒性和 PSTs 毒素谱变化的潜在机制。总之，这项研究加深了我们对有毒甲藻（如亚历山大菌）和纳米粒子在水生环境中可能同时发生的潜在风险和威胁的理解。

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引用次数: 0

Response of particulate organic matter dynamics to the ocean front induced by typhoon Talim in Zhanjiang Bay 湛江湾台风 "塔林 "诱发的海洋锋面颗粒有机物动力学响应

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2024-10-11 DOI: 10.1016/j.marenvres.2024.106784

Chunqing Chen , Qibin Lao , Haoyu Yao , Xuan Lu , Qingmei Zhu , Shangjun Cai , Fajin Chen

Typhoons greatly affect ocean hydrodynamics, thereby altering ocean productivity and biogeochemistry. This study used stable isotopes and geochemical indicators of particulate organic matter (POM) to investigate the impact of Typhoon Talim (2023) on marine productivity and POM dynamics in Zhanjiang Bay. During the typhoon, an ocean front formed in the upper bay, resulting in a nearly twofold increased POM and enhanced decomposition of resuspended POM, due to the strengthened vertical mixing. Despite of strong decomposition, the supplementation of terrestrial nutrient inputs maintained minimal changes in chlorophyll in the upper bay. By contrast, in the lower bay, chlorophyll and POM decreased significantly, primarily attributed to decomposition of fresh POM and nitrogen limitation resulting from high-salinity seawater intrusion induced by the typhoon. This study suggests that after typhoons, in the area where the ocean front forms, the decomposition degrades a large amount of resuspended POM, which is not conducive to the burial of organic carbon.

台风对海洋水动力有很大影响，从而改变海洋生产力和生物地球化学。本研究利用稳定同位素和颗粒有机物（POM）地球化学指标研究了台风 "塔林"（2023年）对湛江湾海洋生产力和POM动态的影响。台风期间，湛江湾上部形成了洋锋，由于垂直混合加强，POM增加了近两倍，再悬浮POM的分解也加强了。尽管分解作用很强，但陆地营养物质的补充使得上海湾的叶绿素变化很小。相比之下，下海湾的叶绿素和 POM 显著下降，主要原因是新鲜 POM 的分解和台风导致的高盐度海水入侵造成的氮限制。这项研究表明，台风过后，在形成洋锋的区域，大量重新悬浮的 POM 被分解降解，不利于有机碳的埋藏。

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引用次数: 0

Distribution characteristics and ecological risk assessment of heavy metal pollution in seawater near the Yellow River Estuary of Laizhou Bay 莱州湾黄河口附近海水重金属污染的分布特征与生态风险评估

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2024-10-10 DOI: 10.1016/j.marenvres.2024.106776

Xiaojie Jin, Jichen Liu, Liming Wang, Xiaoxiao Yu, Jiaying Wang, Yang Jin, Shaonan Qiu, Jiaqi Liu, Yuting Zhao, Shan Sun

To understand the characteristics and pollution status of heavy metals in the intersection areas of Laizhou Bay and the Yellow River Estuary in Shandong Province, the contents of various heavy metals in surface seawater samples collected from this area in August 2022 were detected. The spatial distributions of the heavy metals were analysed, which exhibits a general decreasing trend in the concentrations of Hg, As, Cr, and Pb from west to east, while Cd, Zn, and Cu show the opposite trend. The average single-factor index P values decrease in the following order Pb > Zn > Hg > Cu > As > Cd > Cr, among which Pb, Zn, Hg, and Cu caused pollution in this area. The potential ecological risk index values indicate that the main heavy metal pollutants in study area are Hg and Pb, with Hg having the highest value, accounting for 74.7%, and being the main potential ecological risk factor. Correlation analysis shows that the most significant environmental factor affecting heavy metal content is salinity. According to the interactive heatmap between cluster analysis and station classification, the heavy metals have originated from industrial, agricultural, and domestic sewage discharge, surface runoff, river inputs, seawater aquaculture, maritime transportation, and fuel exhaust emissions. This research hopes to provide some reference value for the protection of marine and estuarine ecosystems.

为了解山东省莱州湾与黄河口交汇区域的重金属特征及污染状况，检测了 2022 年 8 月在该区域采集的表层海水样品中各种重金属的含量。分析了重金属的空间分布，结果表明汞、砷、铬和铅的浓度自西向东呈总体下降趋势，而镉、锌和铜则呈相反趋势。平均单因子指数 P 值的下降顺序为 Pb > Zn > Hg > Cu > As > Cd > Cr，其中 Pb、Zn、Hg 和 Cu 对该区域造成了污染。潜在生态风险指数值表明，研究区主要的重金属污染物是汞和铅，其中汞的指数值最高，占 74.7%，是主要的潜在生态风险因子。相关分析表明，影响重金属含量的最主要环境因素是盐度。根据聚类分析和站点分类的交互热图，重金属来源于工业、农业和生活污水排放、地表径流、河流输入、海水养殖、海上运输和燃料废气排放。这项研究希望能为保护海洋和河口生态系统提供一些参考价值。

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引用次数: 0

Assessing the ecological functioning and biodiversity of remnant native flat oyster (Ostrea angasi) reefs in temperate southeast Australia 评估澳大利亚东南部温带地区残存的本地平牡蛎（Ostrea angasi）礁的生态功能和生物多样性

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2024-10-10 DOI: 10.1016/j.marenvres.2024.106782

Elisabeth M.A. Strain , Ana B. Bugnot , Boze Hancock , Robinson W. Fulweiler , Donald J. Ross , Simon E. Reeves

Oyster reefs are critically endangered coastal habitats which provide valuable ecosystems services. Despite their importance, there remains a significant knowledge gap in our understanding of how oyster and sediment characteristics influence the ecological functioning and biodiversity of remnant Australian flat oyster (Ostrea angasi) reefs. To inform restoration efforts, we assessed relationships between community respiration rates (CR), inorganic nitrogen fluxes, filtration rates, biodiversity, and oyster morphometrics as well as sediment conditions for three remanent flat oyster reefs (Oyster Cove, Ralphs Bay, and Quarantine Bay) in southeast Tasmania. Additionally, we explored relationships between net denitrification, and flat oyster morphometrics and sediment conditions at one of the sites (Ralphs Bay) in southeast Tasmania. We observed positive relationships between CR, inorganic nitrogen fluxes, filtration rates, and live flat oyster biomass, as well as between the richness and biomass of associated taxa and total flat oyster biomass (both tissue and shell including dead shell), across all three locations. We also found an increase in net denitrification associated with live oyster biomass at one of the oyster reefs (Ralphs Bay). The CR, inorganic nitrogen fluxes, filtration rates, diversity of taxa and biomass of bivalves and flat oyster biomass was higher at Ralphs Bay, which has the most intact reef, compared to the other two locations. In contrast to other studies, the organic and silt content of the sediment showed limited influence on CR, inorganic nitrogen fluxes, filtration rates and net denitrification. CR, and inorganic nitrogen fluxes in these flat oyster reefs were like other restored and natural oyster reefs globally, but net denitrification, filtration rate and taxonomic richness exceeded those previously observed globally. These results highlight the important role of oyster biomass in enhancing water quality and biodiversity. Burgeoning flat oyster reef restoration initiatives should prioritise the enhancement of both live oyster populations and dead shells to recover their associated ecological functions and biological diversity.

牡蛎礁是极度濒危的沿海栖息地，可提供宝贵的生态系统服务。尽管牡蛎非常重要，但我们对牡蛎和沉积物特征如何影响残存的澳大利亚平牡蛎（Ostrea angasi）礁的生态功能和生物多样性的认识仍然存在很大的差距。为了给恢复工作提供信息，我们评估了塔斯马尼亚东南部三个残存平牡蛎礁（牡蛎湾、拉尔夫斯湾和检疫湾）的群落呼吸速率（CR）、无机氮通量、过滤速率、生物多样性、牡蛎形态计量以及沉积物条件之间的关系。此外，我们还探讨了塔斯马尼亚东南部其中一个地点（拉尔夫斯湾）的净脱硝、扁平牡蛎形态计量和沉积物条件之间的关系。我们观察到，在所有三个地点，CR、无机氮通量、过滤率和活平牡蛎生物量之间，以及相关类群的丰富度和生物量与平牡蛎总生物量（包括死壳在内的组织和贝壳）之间均存在正相关关系。我们还发现，在其中一个牡蛎礁（拉尔夫斯湾），净反硝化与活牡蛎生物量有关。与其他两个地点相比，拥有最完整礁石的拉尔夫斯湾的CR、无机氮通量、过滤率、双壳类群和生物量的多样性以及扁平牡蛎的生物量更高。与其他研究不同的是，沉积物的有机质和淤泥含量对CR、无机氮通量、过滤率和净反硝化作用的影响有限。这些平坦牡蛎礁的CR和无机氮通量与全球其他修复的和天然的牡蛎礁相似，但净反硝化作用、过滤率和分类丰富度超过了之前在全球观察到的水平。这些结果凸显了牡蛎生物量在提高水质和生物多样性方面的重要作用。正在兴起的平地牡蛎礁修复计划应优先考虑提高活牡蛎种群和死壳，以恢复其相关的生态功能和生物多样性。

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引用次数: 0

A multi-disciplinary approach based on chemical characterization of foreshore sediments, ecotoxicity assessment and statistical analyses for environmental monitoring of marine-coastal areas 基于前滨沉积物化学特征描述、生态毒性评估和统计分析的多学科方法，用于海洋海岸地区的环境监测

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research

Pub Date : 2024-10-09 DOI: 10.1016/j.marenvres.2024.106780

Alberto Ferraro , Antonietta Siciliano , Marisa Spampinato , Raffaele Morello , Gennaro Trancone , Marco Race , Marco Guida , Massimiliano Fabbricino , Danilo Spasiano , Umberto Fratino

The present work aims at providing a multi-disciplinary approach for environmental monitoring in marine-coastal areas. A monitoring campaign of 13 months (October 2022–October 2023) was carried out on sandy foreshore sediments (SFSs). The SFSs were analysed for potentially toxic elements (PTEs) and rare earth elements (REEs) content determination. In the investigated area, variable contamination trends were assessed through Friedman and Nemenyi tests. Further results also indicated the usefulness of statistical data elaboration in the identification of potential contamination sources. In fact, from Spearman test, significant positive correlations (between 0.650 and 0.981) were observed among PTEs of possible anthropogenic origin (such as Co, Cr, Cu, Pb, V, and Zn). For REEs, La and Nd showed strong correlations with Ce (0.909 and 0.920, respectively). The study also integrated luminescence inhibition (Aliivibrio fischeri), algal growth inhibition (Phaeodactylum tricornutum), and embryotoxicity assessment (Paracentrotus lividus) on sediment elutriates showing varying degrees of toxicity. Also these data were analysed through statistics in order to highlight possible correlations between contaminants and observed ecotoxicological effects on the involved bioindicators. The results outline an approach useful for more comprehensive monitoring of marine areas quality and identification of suitable environmental restoration strategies.

本研究旨在为海洋-海岸地区的环境监测提供一种多学科方法。对沙质前滨沉积物（SFSs）进行了为期 13 个月（2022 年 10 月至 2023 年 10 月）的监测。对沙质前滨沉积物进行了潜在有毒元素（PTEs）分析和稀土元素（REEs）含量测定。通过弗里德曼检验和奈梅尼检验评估了调查区域的不同污染趋势。进一步的结果还表明，统计数据分析在确定潜在污染源方面非常有用。事实上，通过斯皮尔曼检验，可观察到可能源于人为活动的 PTEs（如钴、铬、铜、铅、钒和锌）之间存在明显的正相关关系（介于 0.650 和 0.981 之间）。在稀土元素方面，镧和钕与铈的相关性很强（分别为 0.909 和 0.920）。该研究还对显示出不同毒性程度的沉积物洗脱液进行了发光抑制（Aliivibrio fischeri）、藻类生长抑制（Phaeodactylum tricornutum）和胚胎毒性评估（Paracentrotus lividus）。此外，还对这些数据进行了统计分析，以突出污染物与所观察到的对相关生物指标的生态毒理学影响之间可能存在的相关性。研究结果为更全面地监测海域质量和确定合适的环境恢复战略提供了一种有用的方法。

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引用次数: 0