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Multispecies macrozoobenthic seasonal bioturbation effect on sediment erodibility 多物种大型底栖生物季节性生物扰动对沉积物侵蚀性的影响
IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Pub Date : 2024-08-03 DOI: 10.1016/j.seares.2024.102525
Amélie Lehuen, Rose-Marie Oulhen, Zhengquan Zhou, Jaco de Smit, Lennart van Ijzerloo, Francesco Cozzoli, Tjeerd Bouma, Francis Orvain

Bioturbation in estuarine environments describes all sediment reworking processes implied in sediment transport. However, modelling at large spatial and temporal scales remains a challenge because of the need to consider the fauna at the community level, and because animal behaviour is highly seasonal with non-linear effects of macrofauna functional trait interactions. Bioturbation processes can be linked to the activity of organisms, based on the principle of energy ecology, linking the metabolic rate to the erodibility of a sediment colonised by benthic fauna. This study investigates this postulate by evaluating the erodibility parameters of a sediment subjected to: i) the bioturbation under seasonal temperature variations; ii) the synergistic bioturbation of different species. The experimental design consisted of: i) three temperature levels (winter, spring and summer), ii) three types of species duos (Cerastoderma edule and Macoma balthica; Scrobicularia plana and Hediste diversicolor; Corophium volutator and Peringia ulvae) at 4 different relative densities. Two successive experiments were carried out on the same individuals: measurement of oxygen consumption of fauna then measurement of the erodibility of the colonised sediment in a flume. The oxygen consumption confirmed that the metabolic rate is a good model of the fauna respiration, regardless of species. The erosion results indicated that the metabolic rate in the case of the fluff layer resuspension is an interesting descriptor for 1) the assessment of the bioturbation under variable temperatures and 2) the integration of the two different bioturbator species that could co-occur in the same habitat. In contrast, the effect of bioturbation on the mass sediment erosion threshold cannot be easily modelled by using the metabolic rate and the classification in functional groups is required. Bioturbation models of the fluff layer using metabolic rate is a promising tool for modelling the effects of faunal communities on sediment transport at the scale of an estuary and over the long term, even projected in the context of global warming.

河口环境中的生物扰动描述了沉积物迁移过程中隐含的所有沉积物再加工过程。然而,由于需要在群落层面考虑动物群落,而且动物行为具有很强的季节性,并受到大型动物功能特征相互作用的非线性影响,因此在大时空尺度上建立模型仍然是一项挑战。根据能量生态学原理,生物扰动过程可与生物的活动联系起来,将新陈代谢率与底栖动物定殖的沉积物的可侵蚀性联系起来。本研究通过评估以下情况下沉积物的侵蚀性参数来研究这一假设:i) 季节性温度变化下的生物扰动;ii) 不同物种的协同生物扰动。实验设计包括:i) 三种温度水平(冬季、春季和夏季);ii) 四种不同相对密度的三种物种组合( 和 ;和 ;和 )。对同一个体连续进行了两次实验:测量动物的耗氧量,然后在水槽中测量定殖沉积物的可侵蚀性。耗氧量证实,新陈代谢率是动物呼吸的良好模型,与物种无关。侵蚀结果表明,绒毛层再悬浮情况下的新陈代谢率是一个有趣的描述指标,可用于:1)评估不同温度条件下的生物扰动;2)整合可能共存于同一栖息地的两种不同生物扰动物种。与此相反,生物扰动对大量沉积物侵蚀阈值的影响无法通过新陈代谢率轻松建模,需要进行功能组分类。利用代谢率建立的绒毛层生物扰动模型是一种很有前途的工具,可用于模拟河口尺度上动物群落对沉积物运移的长期影响,甚至可用于全球变暖背景下的预测。
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引用次数: 0
Temperature-induced copepod depletion and the associated wax of Bellerochea in Belgian coastal waters: Implications and shifts in plankton dynamics 温度引起的比利时沿海水域桡足类枯竭和相关的 Bellerochea 蜡:浮游生物动态的影响和变化
IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Pub Date : 2024-08-02 DOI: 10.1016/j.seares.2024.102523
Jonas Mortelmans , Ilias Semmouri , Michiel Perneel , Rune Lagaisse , Luz Amadei Martínez , Zoe Rommelaere , Pascal I. Hablützel , Klaas Deneudt

Since 2018, severe and recurrent copepod depletions have been observed in Belgian coastal waters. These depletions have been described as temperature-induced mass mortality events. This paper confirms the relation of copepod abundance anomalies with periods of high temperature based on new data. Although severe, the effects, consequences and implications of this depletion remain unknown. Our study suggests that the absence of zooplanktonic predators in autumn, together with the availability of nutrients discharged via the Scheldt estuary, allowed a bloom of the diatom Bellerochea, in a season otherwise characterised by low phytoplanktonic activity. Although the bloom reaches high abundances, its effects on the marine environment are not yet visible. The enormous abundances are likely to induce small-scale oxygen depletions which might further translate to the environment. Communities of Calanoida, Canuelloida and Cyclopoida tend to recover from the annual autumn depletion, although the typical autumn peak is entirely missing in the years subject to severe heat waves and associated high water temperatures. As a result, copepod dynamics have drastically changed since the first observed depletion and associated bloom of Bellerochea in 2018.

自 2018 年以来,在比利时沿海水域观察到了严重且反复出现的桡足类枯竭现象。这些减少被描述为温度诱发的大规模死亡事件。本文根据新数据证实了桡足类丰度异常与高温期的关系。尽管情况严重,但这种枯竭的影响、后果和意义仍然未知。我们的研究表明,秋季浮游动物捕食者的缺失,再加上斯海尔德河口排放的营养物质,使得硅藻 Bellerochea 在浮游植物活动较少的季节大量繁殖。虽然硅藻大量繁殖,但其对海洋环境的影响尚不明显。巨大的丰度很可能会导致小规模的氧气耗竭,从而进一步影响环境。桡足类、桡足类和环足类群落往往会从每年秋季的耗竭中恢复过来,但在遭受严重热浪和相关高水温的年份,典型的秋季高峰会完全消失。因此,自 2018 年首次观测到 Bellerochea 的枯竭和相关水华以来,桡足类的动态发生了巨大变化。
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引用次数: 0
Different amino acid compositions and food quality of particulate organic matter driven by two major phytoplankton groups in the Ross Sea 罗斯海两大浮游植物群驱动的颗粒有机物的不同氨基酸组成和食物质量
IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Pub Date : 2024-08-02 DOI: 10.1016/j.seares.2024.102524
Jaesoon Kim , Naeun Jo , Jisoo Park , Kwanwoo Kim , Sanghoon Park , Yejin Kim , Jaehong Kim , Bo Kyung Kim , Boyeon Lee , Sang Heon Lee

Understanding the amino acid (AA) composition of phytoplankton-derived particulate organic matter (POM) is crucial for unraveling phytoplankton physiology and assessing food quality. This study investigated AA compositions and food quality of POM associated with two phytoplankton groups in the Ross Sea polynya. The Phaeocystis antarctica (P. antarctica)-predominant group, with P. antarctica overwhelmingly contributing to its composition, demonstrated a fresh state and heightened physiological activity. In contrast, the P. antarctica and diatoms-mixed group exhibited superior essential amino acids (EAAs) contributions and a higher EAA index (EAAI), indicating enhanced food quality. Dissimilarity Index values provided nuanced insights into degradation stages not captured by other indices. Despite lower physiological activity, diatoms in the mixed group stood out as crucial sources of high-quality nutrition for higher trophic levels in the Ross Sea polynya. The observed variations in AA compositions not only reflected the phytoplankton community structure but also provided insights into their physiological conditions. Given the ongoing climate-induced environmental changes potentially influencing phytoplankton communities, this study underscores the potential impacts on the intricate food web dynamics in the Ross Sea polynya. The assessment of AA composition emerged as a valuable tool for understanding the ecological implications for higher trophic levels in this polar region.

了解浮游植物产生的颗粒有机物(POM)的氨基酸(AA)组成,对于揭示浮游植物生理学和评估食物质量至关重要。本研究调查了罗斯海(Ross Sea polynya)两类浮游植物相关的颗粒有机物的AA组成和食物质量。以()为主的浮游植物群在其组成中占绝大多数,表现出清新的状态和更强的生理活性。相比之下,硅藻和硅藻混合组的必需氨基酸(EAAs)含量更高,EAA指数(EAAI)也更高,表明食物质量有所提高。差异指数值提供了其他指数无法捕捉到的降解阶段的细微差别。尽管硅藻的生理活性较低,但混合组中的硅藻仍是罗斯海多能区较高营养级的重要优质营养来源。所观察到的 AA 组成的变化不仅反映了浮游植物群落结构,也为了解浮游植物的生理状况提供了依据。鉴于气候引起的环境变化可能会对浮游植物群落产生影响,这项研究强调了对罗斯海多谷中错综复杂的食物网动态的潜在影响。对 AA 组成的评估是了解这一极地地区较高营养级生态影响的宝贵工具。
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引用次数: 0
Life on every stone: Characterizing benthic communities from scour protection layers of offshore wind farms in the southern North Sea 每块石头上都有生命:北海南部近海风电场冲刷保护层底栖生物群落的特征
IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Pub Date : 2024-07-27 DOI: 10.1016/j.seares.2024.102522
Mirta Zupan , Joop Coolen , Ninon Mavraki , Steven Degraer , Tom Moens , Francis Kerckhof , Lucia Lopez Lopez , Jan Vanaverbeke

The scour protection layer (SPL) is a layer of large stones placed around man-made structures in the marine environment, preventing sediment scouring while also providing new hard substrate and potentially increasing the structural complexity of the original environment. This fosters development of diverse benthic communities, supporting high abundance of organisms. Future SPLs are therefore a potential tool for the ecological enhancement of degrading marine habitats following the principles of nature-inclusive design. Yet, factors that shape the benthic communities on SPLs are poorly understood. Here, we analysed existing data from SPLs from offshore wind farms and a gas platform in the southern North Sea to determine how SPL characteristics affect the biofouling community structure. We combined this analysis with an in-situ experiment testing for the effects of habitat complexity on SPL communities. Our results demonstrate that abundant and diverse communities are present on all SPLs. On a regional scale, communities are mainly affected by depth and location. Increasing habitat complexity has significant and positive effects on species richness yet was non-significant for biomass and abundance of the biofouling community. If applied thoughtfully, nature-inclusive design of the SPL habitat, including manipulation of the physical complexity of the structure, can effectively promote biodiversity.

冲刷保护层(SPL)是放置在海洋环境中人造结构周围的一层大石头,在防止沉积物冲刷的同时还提供了新的坚硬基质,并有可能增加原有环境的结构复杂性。这将促进底栖生物群落的多样化发展,支持生物的大量繁殖。因此,根据自然包容性设计原则,未来的 SPL 是改善退化海洋生境生态的潜在工具。然而,人们对塑造 SPL 底栖生物群落的因素了解甚少。在此,我们分析了北海南部海上风电场和天然气平台 SPL 的现有数据,以确定 SPL 特征如何影响生物污损群落结构。我们将这一分析与现场实验相结合,测试栖息地复杂性对 SPL 群落的影响。结果表明,所有 SPL 上都存在丰富多样的群落。在区域范围内,群落主要受深度和位置的影响。栖息地复杂度的增加对物种丰富度具有显著的积极影响,但对生物污损群落的生物量和丰度却没有显著影响。如果考虑周全,对 SPL 生境进行自然包容性设计,包括控制结构的物理复杂性,可有效促进生物多样性。
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引用次数: 0
Durability test study of laminated specimens for large glass fiber protective structures in seawater 大型玻璃纤维防护结构层压试样在海水中的耐久性试验研究
IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Pub Date : 2024-07-25 DOI: 10.1016/j.seares.2024.102521
Diyi Chen , Xin Lu , Zhao Wang , Yan Qu , Qingqiang Ding

The mechanical properties of glass fiber composite structures prepared by vacuum forming manufacturing process are influenced by various factors and have a certain degree of dispersion, resulting in unclear durability characteristics when applied in corrosive seawater engineering. Firstly, a variety of resin materials for underwater protective structures are tested for seawater degradation, and excellent resins that can still ensure the structural load-bearing capacity and stability after immersion are selected. Secondly, based on relevant standards and specifications, the article conducted seawater immersion aging tests at room temperature and accelerated seawater immersion aging tests at 60°C on glass fiber specimens of 430 epoxy bisphenol vinyl resin and 1967 polycyclic pentadiene resin. Finally, the degradation characteristics of strength, modulus, and impact toughness of the specimens were obtained through a series of mechanical property tests, such as bending, compression, shear and impact, under different aging time periods in room temperature and 60°C seawaters, respectively. The article summarizes the differences in the durability and mechanical properties degradation of large glass fiber protective structures with different resins during seawater immersion.

真空成型制造工艺制备的玻璃纤维复合材料结构的力学性能受多种因素的影响,具有一定的分散性,导致其在腐蚀性海水工程中应用时耐久性能不明确。首先,对多种水下防护结构用树脂材料进行海水降解测试,筛选出浸泡后仍能保证结构承载力和稳定性的优良树脂。其次,文章依据相关标准和规范,对 430 环氧双酚乙烯树脂和 1967 多环戊二烯树脂的玻璃纤维试样进行了常温海水浸泡老化试验和 60°C 加速海水浸泡老化试验。最后,通过在室温和 60°C 海水中分别进行不同老化时间段的弯曲、压缩、剪切和冲击等一系列力学性能测试,获得了试样的强度、模量和冲击韧性等降解特性。文章总结了使用不同树脂的大型玻璃纤维防护结构在海水浸泡期间的耐久性和机械性能退化差异。
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引用次数: 0
Hazard assessment of dynamic marine processes during two extreme weather systems near the Shandong Peninsula 山东半岛附近两次极端天气系统期间动态海洋过程的危害评估
IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Pub Date : 2024-07-23 DOI: 10.1016/j.seares.2024.102520
Dongxue Mo , Ning Wang , Po Hu

Typhoons and extratropical cyclones both occurred frequently on the Shandong Peninsula and have induced severe dynamic marine disasters. In this study, the typhoons and extratropical cyclones that occurred from 1979 to 2018 were counted and classified according to their tracks. We simulated the storm surge and disastrous waves using a coupled ocean-wave model and assessed the hazard distribution under different types of typhoons and extratropical cyclones. Through comparison, it was found that the southern Yellow Sea steering type typhoons and Yangtze-Huai cyclones occurred most frequently and were most likely to cause disasters. Regarding the hazard posed by the storm surge, there was a clear demarcation between the northern and southern coasts of the peninsula, as well as between the eastern and western coasts. The western coast of the peninsula was more exposed to storm surges induced by typhoons, while the northern coast of the peninsula was more exposed to storm surges induced by extratropical cyclones. The hazard posed by waves exhibited a localized characteristic. The wave hazard was the greatest near the peninsula cape and the lowest surrounding the Laizhou Bay, which was contrary to the distribution of the storm surge hazard. The identification of key management areas for disasters provides basic data and a technical reference for coastal development planning and can play a positive role in disaster prevention.

台风和副热带气旋在山东半岛频繁发生,引发了严重的海洋动力性灾害。本研究对 1979 年至 2018 年发生的台风和副热带气旋进行了统计,并根据其路径进行了分类。利用海洋-波浪耦合模式模拟了风暴潮和灾害性海浪,评估了不同类型台风和副热带气旋下的灾害分布。通过比较发现,黄海南部转向型台风和扬子-淮气旋发生频率最高,最容易造成灾害。在风暴潮的危害方面,半岛南北海岸和东西海岸有明显的分界线。半岛西海岸更容易受到台风引起的风暴潮的影响,而半岛北海岸则更容易受到外热带气旋引起的风暴潮的影响。海浪造成的危害具有局部性。半岛海角附近的海浪危害最大,莱州湾周围的海浪危害最小,这与风暴潮危害的分布相反。灾害重点治理区的确定,为沿海开发规划提供了基础数据和技术参考,对防灾起到积极作用。
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引用次数: 0
Trends of ocean temperature influencing snow crab catch along the Scotian Shelf 影响苏格兰大陆架雪蟹捕获量的海洋温度趋势
IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Pub Date : 2024-07-10 DOI: 10.1016/j.seares.2024.102519
Nicholas D. Levangie, Ricardo A. Scrosati

The snow crab (Chionoecetes opilio) fishery has great economic importance for Nova Scotia, contributing $263 million to fisheries and more than one-fifth of Canadian snow crab revenues in 2021. Being a stenothermic species, snow crabs can only live within a narrow range of temperatures between −1 to 6 °C. The Scotian Shelf holds the southernmost populations of snow crab in the Atlantic and snow crab catch-per-unit-area (CPUA) in the Scotian Shelf. Trawl survey data from Ocean, because these cold-temperature requirements are a limiting factor for its distribution. This study investigates the relationship between bottom ocean temperature Fisheries and Oceans Canada from 2012 to 2021 were used. Through nonlinear modelling, CPUA (mt/km2) was regressed with respect to bottom ocean temperature along Northwest Atlantic Fisheries Organization divisions N-ENS, CFA 23, CFA 24, and CFA. The temperature-vs-CPUA relationship was unimodal for all studied years. The best-fit models explained a limited amount of variation, but CPUA consistently decreased to zero towards the highest recorded temperatures. Due to the ongoing global warming, bottom ocean temperatures across the Scotian Shelf will likely continue to increase, which thus might harm the Scotian Shelf snow crab fishery. In conclusion, this study underscores the potential impact of global warming on the economically significant snow crab fishery in the Scotian Shelf. The findings serve as a critical alert to the possible consequences of rising ocean temperatures, thereby contributing to our understanding and preparation for the future of marine ecosystems and industries.

雪蟹(Chionoecetes opilio)渔业对新斯科舍省具有重要的经济意义,在 2021 年为渔业贡献了 2.63 亿美元,占加拿大雪蟹收入的五分之一以上。作为一种恒温物种,雪蟹只能在-1 至 6 °C 的狭窄温度范围内生活。斯科舍大陆架拥有大西洋最南端的雪蟹种群,斯科舍大陆架的雪蟹单位面积渔获量(CPUA)。来自大洋的拖网调查数据表明,这些低温要求是雪蟹分布的限制因素。本研究使用了加拿大渔业与海洋部 2012 年至 2021 年的底层海洋温度之间的关系。通过非线性建模,对西北大西洋渔业组织划分的 N-ES、CFA 23、CFA 24 和 CFA 的 CPUA(mt/km2)与底层海洋温度进行了回归。在所有研究年份,温度与 CPUA 的关系都是单模的。最佳拟合模型解释了有限的变化量,但 CPUA 在最高温度记录时持续下降至零。由于全球持续变暖,整个苏格兰大陆架的海洋底层温度可能会继续上升,从而可能会损害苏格兰大陆架的雪蟹渔业。总之,这项研究强调了全球变暖对具有重要经济意义的苏格兰大陆架雪蟹渔业的潜在影响。研究结果是对海洋温度上升可能造成的后果的重要警示,从而有助于我们了解海洋生态系统和产业的未来并为之做好准备。
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引用次数: 0
Assessing habitat microscale conditions underlying with mortality and survival of Pinna nobilis in the Mar Menor coastal lagoon (SE Spain) 评估 Mar Menor 沿海泻湖(西班牙东南部)中 Pinna nobilis 死亡率和存活率所依赖的栖息地微观条件
IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Pub Date : 2024-07-09 DOI: 10.1016/j.seares.2024.102518
P. Martínez-Martínez , E. Cortés-Melendreras , Y. Fernández-Torquemada , C. Barberá , Y. del-Pilar-Ruso , A. Izquierdo-Muñoz , P. Prado , F. Giménez-Casalduero

Pinna nobilis Linnaeus, 1758 is a Mediterranean endemic bivalve critically endangered due to a severe epidemic caused mainly by the parasite Haplosporidium pinnae. Presently, live populations in Spanish waters are restricted to the Ebro Delta (Catalonia) and the Mar Menor (Murcia). The coastal lagoon of the Mar Menor has faced several eutrophication crises since 2016, which pose a threat to the survival of P. nobilis. Since 2016, >95% of the specimens of this species have died due to recurrent episodes of eutrophication in the lagoon. An analysis of the mortality within the relict population of P. nobilis in the Mar Menor lagoon after the last population survey in 2019 has been carried out, together with a characterisation of some microscale factors that describe its current habitat in the lagoon. For this purpose, three sampling localities were selected along the east coast of the lagoon, where a study of both live and dead individuals was conducted. Additionally, a characterisation of the macrophyte beds and the sediment conditions surrounding these individuals was carried out, comparing the sediment near the recently dead and live individuals. All studied localities exhibit similar mixed macrophyte beds of Cymodocea nodosa (Ucria) Asch., 1870 and Caulerpa prolifera (Forsskål) J.V. Lamouroux, 1809. At the location where significantly less C. nodosa cover was observed, the mortality of P. nobilis individuals was higher, and the sediment near the dead individuals was also more disturbed (with a more negative Eh and higher percentage of organic matter). These results contribute to a better understanding of the dynamics of microscale factors following P. nobilis mortality events, facilitating the identification of potential survival areas.

Pinna nobilis Linnaeus, 1758 是一种地中海特有的双壳类动物,因主要由寄生虫 Haplosporidium pinnae 引起的严重流行病而极度濒危。目前,西班牙水域的活体种群仅限于埃布罗河三角洲(加泰罗尼亚)和梅诺尔河(穆尔西亚)。自 2016 年以来,梅诺尔湖的沿海泻湖已面临多次富营养化危机,这对 P. nobilis 的生存构成了威胁。自2016年以来,>95%的该物种标本因泻湖中反复出现的富营养化现象而死亡。在 2019 年最后一次种群调查之后,对梅诺尔湖(Mar Menor lagoon)中 P. nobilis 孑遗种群的死亡率进行了分析,并对描述其目前在泻湖中栖息地的一些微观因素进行了描述。为此,我们沿泻湖东岸选择了三个取样点,对活体和死亡个体进行了研究。此外,还对这些个体周围的大型藻床和沉积物状况进行了分析,比较了近期死亡个体和活体个体附近的沉积物。所有研究地点都呈现出类似的巨藻混合床,由结节藻(Cymodocea nodosa (Ucria) Asch.,1870 年)和增殖藻(Caulerpa prolifera (Forsskål) J.V. Lamouroux,1809 年)组成。在结节草覆盖率明显较低的地点,鹅掌楸个体的死亡率较高,死亡个体附近的沉积物受到的干扰也更大(负 Eh 值更高,有机物百分比更高)。这些结果有助于更好地了解绒螯虾死亡事件后微观因素的动态变化,从而有助于确定潜在的生存区域。
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引用次数: 0
Investigation on the soil resistance to wave-induced lateral erosion under different mangrove forests 不同红树林下土壤对波浪引起的横向侵蚀的抵抗力调查
IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Pub Date : 2024-07-02 DOI: 10.1016/j.seares.2024.102517
Heng Wang , Mingxiao Xie , Ou Chen , Zeng Zhou , Haobing Cao , Wen Wei

Under the effect of global climate change, the enhanced wave condition leads to lateral erosion at the mangrove vegetation edge, threatening the survival of mangrove habitat and the safety of coastal defense. By means of investigations on soil physicochemical properties and wave flume experiments, we quantify the lateral erosion rates of mangrove soils under waves and bridge the edge stability and vegetation with soil properties. It is found that different mangrove species and stand ages significantly alter the physiochemical properties of soils, and consequently affect the erosion resistance. Lateral erosion rate is positively correlated with organic matter content and negatively correlated with saturated density, which serve as two main factors that affect soil resistance to wave forcing. Experimental datasets suggest that the soil lateral erosion rate of Kandelia obovata reaches several times larger than that of Sonneratia apetala among different stand ages, indicating that the erosion resistance has significant differences between mangrove species. Among different Sonneratia apetala sites, the erosion resistance is enhanced with increasing mangrove stand age. This study sheds light on the feedbacks between geo-morphodynamics and intertidal vegetation, which provides a promising experimental approach to evaluate the ecological functions of mangrove forests with respect of resistance to external disturbance. Insights gained from this study is useful in guiding the nature-based solutions for coastal defense through proper spatial-temporal configuration of suitable saplings with higher potential in resilience.

在全球气候变化的影响下,波浪增强导致红树林植被边缘侧向侵蚀,威胁红树林生境的生存和海岸防御安全。通过对土壤理化性质的研究和波浪水槽实验,我们量化了红树林土壤在波浪作用下的侧向侵蚀速率,并将边缘稳定性和植被与土壤性质联系起来。研究发现,不同的红树林种类和树龄会显著改变土壤的理化性质,进而影响土壤的抗侵蚀能力。侧向侵蚀率与有机质含量呈正相关,与饱和密度呈负相关,这两个因素是影响土壤抗波性的主要因素。实验数据表明,在不同树龄的红树林中,Kandelia obovata 的土壤侧向侵蚀率是 Sonneratia apetala 的数倍,这表明不同红树林物种的抗侵蚀能力存在显著差异。在不同的 Sonneratia apetala 地点,抗侵蚀能力随着红树林树龄的增加而增强。这项研究揭示了地貌动力学与潮间带植被之间的反馈作用,为评估红树林抵抗外部干扰的生态功能提供了一种可行的实验方法。这项研究获得的启示有助于通过在空间和时间上合理配置具有较高抗逆潜力的合适树苗,指导基于自然的海岸防御解决方案。
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引用次数: 0
STA-SST: Spatio-temporal time series prediction of Moroccan Sea surface temperature STA-SST:摩洛哥海面温度时空时间序列预测
IF 2.1 4区 地球科学 Q2 MARINE & FRESHWATER BIOLOGY Pub Date : 2024-06-27 DOI: 10.1016/j.seares.2024.102515
Isam Elafi , Nabila Zrira , Assia Kamal-Idrissi , Haris Ahmad Khan , Aziz Ettouhami

Global Sea Surface Temperature (SST) trends have garnered significant attention in several ocean-related domains, including global warming, marine biodiversity, and environmental protection. This involves having an accurate and efficient forecast of future SST to ensure early detection and response in time to these events. Deep learning algorithms have become popular in SST prediction recently, although directly obtaining optimal prediction results from historical observation data is not simple. In this paper, we propose STA-SST, a new deep learning approach for forecasting SST, by combining the temporal dependencies of SST using the Bidirectional Long Short-Term Memory (BiLSTM) model, spatial features extracted from the convolution layer, and relevant information from the attention mechanism. To assess how well the Attention-BiLSTM with convolution layer predicts SST, we conducted a case study in the Moroccan Sea, concentrating on five different areas. The proposed model was compared against alternative forecasting models, including LSTM, XGBoost, Support Vector Regression (SVR), and Random Forest (RF). The experimental results show that STA-STT produces noticeably the best prediction results and is a solid choice for field implementation.

全球海面温度(SST)趋势在多个与海洋相关的领域引起了极大关注,包括全球变暖、海洋生物多样性和环境保护。这就需要对未来的 SST 进行准确有效的预测,以确保及早发现并及时应对这些事件。虽然直接从历史观测数据中获取最优预测结果并不简单,但深度学习算法最近在 SST 预测领域大受欢迎。在本文中,我们利用双向长短期记忆(BiLSTM)模型将 SST 的时间依赖性、从卷积层提取的空间特征和注意力机制的相关信息结合起来,提出了预测 SST 的新型深度学习方法 STA-SST。为了评估带有卷积层的注意力-BiLSTM 预测 SST 的效果,我们在摩洛哥海进行了一项案例研究,主要集中在五个不同的区域。提出的模型与其他预测模型进行了比较,包括 LSTM、XGBoost、支持向量回归(SVR)和随机森林(RF)。实验结果表明,STA-STT 的预测结果明显最佳,是实地应用的可靠选择。
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引用次数: 0
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Journal of Sea Research
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