Paper Push: 2026-07-10
Back to date list
每日论文推送：BGC-Argo、海色/海洋光学、海洋热浪与碳泵Daily Paper Push: BGC-Argo, ocean colour/ocean optics, marine heatwaves and carbon pump
本期由 GitHub Actions 自动检索生成：Nature/Science 系列优先，其次是用户指定重点期刊，再补充重点关注团队的新论文，最后纳入其他相关期刊；历史去重后保留 11 篇，不超过每日 50 篇上限。 This issue was generated automatically by GitHub Actions: Nature and Science series first, then the user-defined priority journals, then new papers from the focused team, followed by other relevant journals as topical supplements. After deduplication, 11 papers remain, below the daily limit of 50.
Download Word summary
无 mechanism sketch 图。今天的意大利语卡片： No mechanism sketch figure today. Daily Italian card:
每日一句意大利语Daily Italian
Era già l'ora che volge il disio ai navicanti.
Dante, Commedia, Purgatorio VIII, 1; Italian original from Kalliope
这是黄昏时分的名句：那是让航海者转向思乡之情的时刻。它把时间、旅途和乡愁连在一起。
This famous evening line describes the hour that turns sailors' desire homeward. It joins time, travel, and longing.
趋势总结Trend Summary
本期重点关注 BGC-Argo、海色遥感/海洋光学、海洋热浪、浮游植物垂向结构和碳泵过程。筛选逻辑不再只限于重点期刊；当高影响力期刊当天新增较少时，会额外检索重点关注团队作者的新论文，并用海洋、海色/光学和碳循环关键词过滤，再从其他相关期刊补充候选论文。
This issue focuses on BGC-Argo, ocean-colour remote sensing, ocean optics, marine heatwaves, vertical phytoplankton structure and carbon-pump processes. The selection is no longer limited to priority journals; when few high-impact papers are newly available, the workflow also checks focused-team authors and filters those papers with ocean, ocean-colour/optics, and carbon-cycle keywords before adding other relevant journals as supplements.
重点期刊：按影响力和相关性排序Key journals: ordered by impact and relevance
1. Marine Heatwave Persistence Drives Phytoplankton Miniaturization and Productivity Decline in the South China Sea
作者Authors: Jun Zhao; Wenbo He; Xueyuan Huang; Zhimin Bai; Huajian Zheng; Xinyan Li; Haiju Hu; Lin Deng
发表月份Publication month: 2026-07 2026-07
Journal of Geophysical Research: Oceans · DOI: 10.1029/2025jc023755
关键词Tags: phytoplankton; marine heatwaves phytoplankton; marine heatwaves
摘要：海洋热浪（MHW）已成为海洋变化的主导因素，但其对边缘海的生物学影响仍未得到很好的解决。利用四十年（1982年至2021年）的高分辨率卫星温度记录，我们发现南海（SCS）的重灾区显着增强，每年累积的重灾区天数翻了两番——从1980年代的每年约35天增加到2010年代的约140天。在事件频率（每十年增加 1. 72 次事件）和平均持续时间（每十年延长 0. 7 天）方面也观察到了显着趋势，特别是在沿海上升流走廊沿线。来自卫星的、尺寸分级的初级生产数据揭示了与持续时间相关的响应。 短期 MHW 造成 15%–30% 的下降，主要是纳米和微型浮游植物的损失，而长期事件则将所有大小类别抑制高达 50%，并使超微型浮游植物的相对份额增加约 20%。潜在的“三重强迫”——浅滩混合层（浅5-15 m）、净热通量增强（>5 W m -2 ）和上升流减弱——限制了养分夹带并驱动了全盆地的贫营养化。与国家海洋和大气管理局的比较，OISST V2表明，粗分辨率海面温度场低估了事件强度0. 3°–0. 6°C，错过超过 25% 的沿海极端天气。 这些结果确定了 MHW 持久性，而不仅仅是振幅，是生态系统破坏的关键决定因素，推动了浮游植物群落的系统性小型化，并将南海转变为细胞更小、出口量低的浮游植物群落。
Abstract: Marine heat waves (MHWs) have become a dominant agent of oceanic change, yet their biological consequences in marginal seas remain poorly resolved. Using four decades (1982–2021) of high‐resolution satellite temperature records, we found that MHWs in the South China Sea (SCS) have intensified significantly, with the cumulative annual MHW days quadrupled—from ∼35 days per year in the 1980s to ∼140 days in the 2010s. Significant trends were also observed in event frequency (increasing by 1.72 events per decade) and mean duration (lengthening by 0.7 days per decade), particularly along coastal upwelling corridors. Satellite‐derived, size‐fractionated primary production data revealed duration‐dependent responses. Short‐duration MHWs caused 15%–30% declines dominated by nano‐ and micro‐phytoplankton losses, whereas long‐duration events suppressed all size classes by up to 50% and increased pico‐phytoplankton's relative share by ∼20%. The underlying “triple forcing”—shoaling mixed layers (5–15 m shallower), enhanced net heat flux (>5 W m −2 ), and weakened upwelling—limited nutrient entrainment and drove basin‐wide oligotrophication. Comparison with National Oceanic and Atmospheric Administration, OISST V2 showed that coarse‐resolution sea surface temperature fields underestimate event intensity by 0.3°–0.6°C and miss >25% of coastal extremes. These results identified MHW persistence, rather than amplitude alone, as the critical determinant of ecosystem disruption driving a systematic miniaturization of phytoplankton communities and transforming the SCS toward smaller‐celled, low‐export phytoplankton communities.
2. A Weakened East Asian Winter Monsoon Triggered Record‐Breaking Marine Heatwaves in the South China Sea During 2023–2024
作者Authors: Xuancheng Lu; Fuan Xiao; Zhifeng Wu; Jieshan Huang; Qiang Wang; Dongxiao Wang
发表月份Publication month: 2026-07 2026-07
Journal of Geophysical Research: Oceans · DOI: 10.1029/2026jc024234
关键词Tags: marine heatwaves marine heatwaves
摘要：南海（SCS）在2023年至2024年期间经历了最极端的海洋热浪（MHW），其强度和持续时间都打破了历史记录。 MHW 事件创下了最大海面温度距平 (SSTA) +1 的新纪录。盆地温度为 64°C。热收支分析表明，MHW 峰值阶段（10 月至 11 月中旬）约 64. 7% 的变暖是由与东亚冬季风 (EAWM) 异常减弱相关的潜热通量 (LHF) 减少所致。峰值阶段的极端海温异常进一步归因于长期变暖趋势 (39. 5%)、正印度洋偶极子 (IOD, 27. 8%) 和热带北大西洋极端变暖 (TNA, 21. 6%)，另外厄尔尼诺现象的贡献也有限。 这些气候模式共同增强了西太平洋副热带高压，使其在空间范围和强度上都打破了历史记录，从而抑制了东亚冬季风。持续时间较长的重水事件引发了严重的复合生态扰动，导致全流域溶解氧浓度降至200. 4 μmol kg -1 ，初级生产力创历史新低0. 116 mg m -3 。这些发现强调了多流域气候强迫的协同影响以及边缘海极端MHW造成的严重生态系统后果。
Abstract: The South China Sea (SCS) experienced its most extreme marine heatwave (MHW) during 2023–2024, breaking the historical record in intensity and duration. The MHW event set a new record with a maximum sea surface temperature anomaly (SSTA) of +1.64°C on a basin scale. Heat budget analysis indicated that approximately 64.7% of the warming during the MHW peak phase (from October to mid‐November) was driven by a reduction in latent heat flux (LHF) associated with anomalously weakened East Asian winter monsoon (EAWM). The extreme SSTA during peak phase was further attributed to the long‐term warming trend (39.5%), the positive Indian Ocean Dipole (IOD, 27.8%), and extreme warming in the tropical North Atlantic (TNA, 21.6%), with additional limited contribution from an El Niño. These climate modes jointly intensified the western Pacific subtropical high, causing it to break historical records in both spatial extent and intensity, which in turn suppressed the EAWM. The prolonged MHW event triggered severe compound ecological disturbances, causing basin‐wide dissolved oxygen concentration to fall to 200.4 μmol kg −1 and primary productivity to a record low of 0.116 mg m −3 . These findings highlight the synergistic impact of multi‐basin climate forcing and the severe ecosystem consequences of extreme MHWs in marginal seas.
3. New insights into the primary production and the structure of the phytoplankton community in the South Indian Ocean using size fractionation experiments
作者Authors: Valentin Deteix; Céline Ridame; Céline Dimier; Claire Lo Monaco; Aline Tribollet; Frédéric Planchon
发表月份Publication month: 2026-07 2026-07
Biogeosciences · DOI: 10.5194/bg-23-4793-2026
关键词Tags: carbon pump; phytoplankton carbon pump; phytoplankton
摘要：作为南印度洋从地表到中层暮色区碳通量 (SOCARB) 项目的一部分，浮游植物生物量和净初级生产 (NPP) 以及浮游植物化学分类群的生物量于 2023 年夏末在对比生物地球化学区域进行了评估：南印度洋的贫营养副热带水域、高营养物低营养物区域叶绿素（HNLC）水域，以及南大洋凯尔盖朗群岛附近高产水域。采用尺寸分级方法来表征初级生产和浮游植物化学分类群生物量的尺寸结构，分为三个尺寸类别：超微型浮游植物（20 µm）。 在整个研究区域，NPP 以微型浮游植物 (56% ± 21%) 为主，而总叶绿素 a (TChl a) 由纳米浮游植物 (40% ± 11%) 和微型浮游植物 (37% ± 18%) 维持，特别是纳米浮游植物触生藻和微型浮游植物硅藻。我们的结果强调了 NPP 和 TChl a 大小结构的空间变异性，主要由温度和大量营养素 (N、P) 驱动。在亚热带和亚南极地区，NPP以纳米和微型浮游植物为主，而TChl a则由具有多样化群落（蓝藻、触生植物、绿藻、高原植物）的微微和纳米浮游植物维持。相反，在极锋区和南极区，NPP 和 TChl a 以纳米和微型浮游植物为主，群落多样性较低（硅藻、触生植物）。 基于色素的化学分类学与尺寸分级的结合揭示了对浮游植物化学分类群的尺寸特异性分布的新见解，挑战了针对总体组分的传统功能类型方法，并强调了所有三个尺寸类别中硅藻和触生藻等关键类群的存在。我们的结果还强调了 NPP 和 TChl a 通过自下而上过程的区域内变化，例如副热带地区的气旋涡流或极地锋区的贫硅水团入侵。着眼于整个研究区域的NPP和TChl大小结构之间的联系，NPP主要由纳米和微型浮游植物的生物量驱动，更具体地说是由纳米和微型浮游植物硅藻、触生植物和甲藻的生物量驱动。 这项研究为更好地了解浮游植物生产力和群落规模结构铺平了道路，这可能有助于更详细地了解它们在生物碳泵中的作用。
Abstract: As part of the South Indian Ocean CARBon fluxes from the surface to the mesopelagic twilight zone (SOCARB) project, the phytoplankton biomass and net primary production (NPP), along with the biomass of phytoplankton chemotaxonomic groups, were assessed during late austral summer 2023 in contrasting biogeochemical areas: the oligotrophic subtropical waters of the South Indian Ocean, High Nutrient Low Chlorophyll (HNLC) waters, and the highly productive waters in the vicinity of Kerguelen Islands in the Southern Ocean. A size fractionation approach was performed to characterize the size structure of primary production and phytoplankton chemotaxonomic groups biomass in three size classes: picophytoplankton ( 20 µm). Across the study area, NPP was dominated by microphytoplankton (56 % ± 21 %) while total chlorophyll a (TChl a) was sustained by nano- (40 % ± 11 %) and microphytoplankton (37 % ± 18 %), notably by nanophytoplankton haptophytes and microphytoplankton diatoms. Our results highlighted the spatial variability of NPP and TChl a size structures, mainly driven by temperature and macronutrients (N, P). In the Subtropical and Subantarctic zones, NPP was dominated by nano- and microphytoplankton while TChl a was sustained by pico- and nanophytoplankton with a diversified community (cyanobacteria, haptophytes, chlorophytes, pelagophytes). Conversely in the Polar Frontal and Antarctic zones, NPP and TChl a were dominated by nano- and microphytoplankton with a less diversified community (diatoms, haptophytes). The coupling of pigment-based chemotaxonomy with size fractionation reveals new insights into the size-specific distribution of phytoplankton chemotaxonomic groups, challenging traditional functional type approaches on the bulk fraction and highlighting the presence of key groups such as diatoms and haptophytes across all three size classes. Our results also underline the intra-zonal variability of NPP and TChl a through bottom-up processes, such as cyclonic eddy in the Subtropical zone or Si-depleted water mass intrusion in the Polar Frontal zone. Focusing on the links between NPP and TChl a size structure across the study area, NPP was mainly driven by the biomass of nano- and microphytoplankton, more specifically by the biomass of nano- and microphytoplankton diatoms, haptophytes and dinoflagellates. This study paves the way for a better understanding of phytoplankton productivity and community size structure, which could contribute to a more detailed knowledge on their role in the biological carbon pump.
重点关注团队Focused team
4. Marine heatwave impacts are seasonally amplified by ocean biogeochemical gradients
作者Authors: Jing Yang; Chen Peng; Kun Shi; R. Iestyn Woolway; Robert J. W. Brewin; Afonso Ferreira; Siqi Zhang; Zhenhua Zhang; et al.
发表月份Publication month: 2026-07 2026-07
Communications Earth & Environment · DOI: 10.1038/s43247-026-03792-6
关键词Tags: marine heatwaves marine heatwaves
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
5. Environmental drivers of dominant phytoplankton species succession in a subtropical reservoir: a species-specific ecological analysis of Shanzai Reservoir, Fujian, China
作者Authors: Jehangir Ijaz; Sheraz Akhtar Gil; Yuping Su; Weng Yuxin; Tang Jian; Muhammad Irfan Ahamad
发表月份Publication month: 2026-07 2026-07
Marine and Freshwater Research · DOI: 10.1071/mf26075
关键词Tags: phytoplankton phytoplankton
摘要：背景 气候变暖和富营养化导致亚热带饮用水水库面临着越来越多的蓝藻水华威胁。目的 本研究调查了中国福建省山寨水库优势浮游植物演替的环境驱动因素。方法 对四个地点进行每月地表水监测（2023 年 4 月至 2024 年 4 月，n = 52）。应用克鲁斯卡尔-沃利斯检验、典型对应分析（CCA）、路径分析和受试者工作特征（ROC）曲线分析来识别和验证环境驱动因素和水华风险阈值。主要结果 确定了七个优势物种；微囊藻属(44. 2%) 和 Melosira sp。 (36. 5%) 合计占发生次数的 80% 以上。 CCA（轴 1：r = 0. 895）将 pH、温度和化学需氧量 (COD) 确定为最强的多元判别因素。 路径分析表明，温度主要通过温度→分层→蓝藻生物量链的间接途径（R2 = 0. 780）发挥作用。 ROC 分析验证了水华风险阈值如下：温度 ≥ 25. 6°C（曲线下面积，AUC = 0. 904），pH ≥ 9. 12 (AUC = 0. 941) 和 COD ≥ 2. 70 mg L−1 (AUC = 0. 956)。结论 确认了所有优势物种都有独特的生态位，温度和磷是主要的演替驱动因素。含义 经过统计验证的阈值为水库管理者提供了实用的两阶段预警框架，以预测和防止有害的蓝藻水华。
Abstract: Context Subtropical drinking-water reservoirs face increasing threats from cyanobacterial blooms driven by warming and eutrophication. Aims This study investigated environmental drivers of dominant phytoplankton succession in Shanzai Reservoir, Fujian Province, China. Methods Monthly surface-water monitoring was conducted across four sites (April 2023–April 2024, n = 52). Kruskal–Wallis tests, canonical correspondence analysis (CCA), path analysis and receiver operating characteristic (ROC) curve analysis were applied to identify and validate environmental drivers and bloom-risk thresholds. Key results Seven dominant species were identified; Microcystis spp. (44.2%) and Melosira sp. (36.5%) together accounted for over 80% of occurrences. CCA (Axis 1: r = 0.895) identified pH, temperature and chemical oxygen demand (COD) as strongest multivariate discriminators. Path analysis showed that temperature acts primarily through indirect pathways (R2 = 0.780) by a temperature → stratification → cyanobacteria biomass chain. ROC analysis validated bloom-risk thresholds as follows: temperature ≥ 25.6°C (area under the curve, AUC = 0.904), pH ≥ 9.12 (AUC = 0.941) and COD ≥ 2.70 mg L−1 (AUC = 0.956). Conclusions Distinct ecological niches were confirmed for all dominant species, with temperature and phosphorus as primary succession drivers. Implications The statistically validated thresholds provide a practical two-stage early warning framework for reservoir managers to predict and prevent harmful cyanobacterial blooms.
6. Towards Microalgal Biorefinery: Multiproduct Fractionation of Phaeodactylum tricornutum by Liquid–Liquid Techniques
作者Authors: Kolos Makay; Claudia Grewe
发表月份Publication month: 2026-07 2026-07
Marine Drugs · DOI: 10.3390/md24070242
关键词Tags: phytoplankton phytoplankton
摘要：三角褐指藻是一种很有前途的生物精炼原料，因为它含有岩藻黄质和二十碳五烯酸 (EPA) 等高价值化合物，以及其他色素、蛋白质、碳水化合物和多酚类物质。然而，下游加工通常针对单一化合物，导致可能的副产品未得到充分利用，从而限制了生物质的增值。本研究通过将固-液-液萃取 (SLLE) 与离心分配色谱 (CPC) 相结合，开发了一种针对潮湿、破碎的三角角藻生物质的多产品工作流程。 SLLE 步骤使用乙酸乙酯/正丁醇/水溶剂系统（3:2:5，v/v/v），并针对生物质负载和提取时间进行了优化，产生亲脂性、水性、界面性和不溶性初级级分。 生物质含量是控制这些组分的分配和目标化合物回收的主要因素，而提取时间具有次要影响。在1. 3 h和4. 25%生物质含量的工艺优化条件下，岩藻黄质和EPA回收率分别达到91. 3%和70%。亲脂部分通过两级 CPC 进一步精制，产生高纯度岩藻黄质 (99. 4 ± 1. 0%) 和富含 EPA 的甘油脂 (高达 99. 9 ± 0. 5%)。此外，在整个过程中还获得了另外十个级分，包括含类胡萝卜素、叶绿素、多酚、富含蛋白质和富含碳水化合物的级分。总体而言，这种十二部分工作流程支持向可扩展的三角褐藻生物精炼厂的过渡，并为评估向其他微藻的可转移性提供了基础。
Abstract: Phaeodactylum tricornutum is a promising biorefinery feedstock because it contains high-value compounds such as fucoxanthin and eicosapentaenoic acid (EPA), alongside other pigments, proteins, carbohydrates, and polyphenolics. However, downstream processing often targets single compounds, leaving possible co-products underutilised, thus limiting biomass valorisation. This study developed a multiproduct workflow for wet, disrupted P. tricornutum biomass by coupling solid–liquid–liquid extraction (SLLE) with centrifugal partition chromatography (CPC). The SLLE step used an ethyl acetate/n-butanol/water solvent system (3:2:5, v/v/v) and was optimised with respect to biomass loading and extraction time, yielding lipophilic, aqueous, interfacial, and insoluble primary fractions. Biomass content was the dominant factor governing partitioning into these fractions and target-compound recovery, whereas extraction time had a secondary influence. Under process-oriented optimised conditions of 1.3 h and 4.25% biomass content, fucoxanthin and EPA recoveries reached 91.3% and 70%, respectively. The lipophilic fraction was refined further by two-stage CPC, yielding high-purity fucoxanthin (99.4 ± 1.0%) and EPA-enriched glycerolipids (up to 99.9 ± 0.5%). Additionally, ten further fractions were obtained, including carotenoid-containing, chlorophyll, polyphenolic, protein-rich, and carbohydrate-rich fractions in the whole process. Overall, this twelve-fraction workflow supports the transition toward a scalable P. tricornutum biorefinery and provides a basis for assessing transferability to other microalgae.
7. CARE Radiative Transfer Model: A Tool for Supporting Polarization and Hyperspectral Radiative Transfer Simulation in the Coupled Atmosphere–Ocean System
作者Authors: Chong Shi; Husi Letu; Teruyuki Nakajima; Miho Sekiguchi; Wenwu Wang; Ruijie Yao; Huazhe Shang; Shuai Yin; et al.
发表月份Publication month: 2026-07 2026-07
Advances in Atmospheric Sciences · DOI: 10.1007/s00376-026-5676-6
关键词Tags: ocean biogeochemistry ocean biogeochemistry
摘要：Crossref 未提供该 DOI 的摘要。
Abstract: Crossref did not provide an abstract for this DOI.
其他相关期刊：按主题相关性补充Other relevant journals: topical supplements
8. Coral Reef Community Structure and Photophysiology Differ Between Upwelling and Non-Upwelling Locations on the Pacific Coast of Costa Rica
作者Authors: Dar Golomb; Kayla M. Cayemitte; Grace K. Saba; Lori M. Garzio; Maxim Gorbunov; Clinton Haldeman; Juan José Alvarado; Tali Mass; et al.
发表月份Publication month: 2026-07 2026-07
Journal of Marine Science and Engineering · DOI: 10.3390/jmse14141265
关键词Tags: carbon pump; phytoplankton; marine heatwaves carbon pump; phytoplankton; marine heatwaves
摘要：造礁珊瑚和珊瑚藻形成了支撑热带珊瑚礁的碳酸钙框架，但在某些地方，由于海洋热浪和其他压力因素，近几十年来，珊瑚覆盖率下降了约 50%。因此，识别庇护环境，例如上升流系统，可以缓冲压力，促进恢复，并可以通过促进支持耐热性的生理可塑性来增强恢复力，这一点至关重要。在这里，我们比较了哥斯达黎加太平洋沿岸帕帕加约湾的上升流地点和萨马拉的非上升流地点之间的底栖群落组成、珊瑚覆盖率和光生理学。帕帕加约的水域温度较低、酸性更强，叶绿素 a 浓度也更高。 与萨马拉相比，该地点的珊瑚礁呈现出更高的壳状珊瑚藻、更高的海胆丰度和更低的大型藻类覆盖率。帕帕加约 (Papagayo) 还显示出更高的石珊瑚覆盖率，这是由 Pocillopora spp. 驱动的。 ，而萨马拉则以大量耐热滨珊瑚属为主。不同地点的光生理参数存在显着差异。具体而言，帕帕加约珊瑚的光合效率 (Fv’/Fm’) 比萨马拉珊瑚高 10–45%，最大光合速率 (Pmax) 低 20–40%。这些结果表明，在相对较小的地理区域内，环境状况不同的两个地点的珊瑚群落组成和光生理特征也不同。 尽管需要进一步的研究来解决这些环境对比是否会影响观察到的生物差异，但观察到的模式与这种制度可能支持珊瑚礁持续存在或避难所的假设是一致的，为未来直接检验这一假设的工作提供了基础。
Abstract: Reef-building corals and coralline algae form the calcium carbonate frameworks that underpin tropical coral reefs, yet in some locations, coral cover has declined by ~50% in recent decades due to marine heatwaves and other stressors. Identifying refugia environments, such as upwelling systems, that may buffer stress, promote recovery, and could enhance resilience by promoting physiological plasticity that supports thermotolerance is therefore critical. Here, we compared benthic community composition, coral percent cover, and photophysiology between an upwelling location in the Gulf of Papagayo and a non-upwelling location in Sámara on the Pacific coast of Costa Rica. Waters in Papagayo were cooler, more acidic, and had higher chlorophyll-a concentrations. Reefs at this location exhibited higher crustose coralline algae, higher sea urchin abundance, and lower macroalgae cover, compared to Sámara. Papagayo also showed higher stony coral cover, driven by Pocillopora spp., while Sámara was dominated by massive, heat-tolerant Porites spp. Photophysiological parameters were significantly different between locations. Specifically, photosynthetic efficiency (Fv’/Fm’) was 10–45% higher, and maximum photosynthetic rate (Pmax) was 20–40% lower in corals from Papagayo than in those from Sámara. These results reveal that two locations differing in environmental regime within a relatively small geographic area also differ in coral community composition and photophysiological features. Although further research is needed to resolve whether these environmental contrasts shape the observed biological differences, the observed patterns are consistent with the hypothesis that such regimes may support reef persistence or refugia, providing a basis for future work to test this hypothesis directly.
9. Spatiotemporal dynamics of chlorophyll-a in Pekalongan coastal waters, Indonesia, derived from sentinel-2 imagery
作者Authors: Muhammad Nur Al Fajrin; Lilik Maslukah; Aris Ismanto; Muhammad Zainuri; Anindya Wirasatriya; Ulung Jantama Wisha; Muhammad Shulhan Jihadi
发表月份Publication month: 2026-07 2026-07
Anthropocene Coasts · DOI: 10.1007/s44218-026-00145-w
关键词Tags: phytoplankton; vertical structure phytoplankton; vertical structure
摘要：叶绿素a是初级生产力的关键指标，也是评估河口水质的重要参数。本研究开发了一种根据 Sentinel-2 图像估算叶绿素 a 浓度的经验算法，并研究了 2020 年至 2024 年印度尼西亚中爪哇省北加浪岸水域气象和水文因素对叶绿素 a 变化的影响。在第一个过渡季节和东南季风期间，在墨西哥河、盛加朗河和洛吉河的河口地区进行了实地观测。为了最大限度地减少潮汐影响，在可比较的潮汐条件（洪水到落潮）下进行了现场采样和卫星采集。在测试的模型中，基于绿红带比的指数回归表现出最佳性能（R 2 = 0. 543，RMSE = 1. 284 µg/L，偏差 = 0. 303 µg/L）。 开发的算法成功捕获了叶绿素-a 的空间分布，显示河口区域的浓度 (1. 6–11. 4 µg/L) 始终高于近海水域 (0. 2–7. 0 µg/L)，表明陆地影响强烈。相关分析表明，叶绿素-a 浓度与风速 (r = − 0. 518) 和日照时数 (r = − 0. 550) 呈负相关，表明垂直混合和光相关限制对浮游植物生长的影响，而降雨则表现出很强的正相关关系。河流流量仅表现出中等相关性，表明叶绿素-a 动态受多个相互作用的环境驱动因素控制。总体而言，北加浪岸水域的叶绿素变化是由陆地输入、气象强迫和物理海洋过程的相互作用形成的。 该算法为热带沿海水域叶绿素a 监测提供了一种有效的方法。
Abstract: Chlorophyll-a is a key indicator of primary productivity and an essential parameter for assessing estuarine water quality. This study developed an empirical algorithm for estimating chlorophyll-a concentration from Sentinel-2 imagery and investigated the influence of meteorological and hydrographic factors on chlorophyll-a variability in Pekalongan Waters, Central Java, Indonesia, during 2020–2024. In situ observations were conducted in the estuarine areas of the Mrican, Sengkarang, and Loji Rivers during the first transitional season and the Southeast Monsoon period. To minimize tidal effects, field sampling and satellite acquisition were performed under comparable tidal conditions (flood to ebb). Among the tested models, an exponential regression based on the green-to-red band ratio demonstrated the best performance (R 2 = 0.543, RMSE = 1.284 µg/L, bias = 0.303 µg/L). The developed algorithm successfully captured the spatial distribution of chlorophyll-a, revealing consistently higher concentrations in estuarine areas (1.6–11.4 µg/L) than in offshore waters (0.2–7.0 µg/L), indicating strong terrestrial influence. Correlation analysis showed that chlorophyll-a concentration was negatively associated with wind speed (r = − 0.518) and sunshine duration (r = − 0.550), suggesting the influence of vertical mixing and light-related constraints on phytoplankton growth, whereas rainfall exhibited a strong positive relationship. River discharge showed only a moderate correlation, indicating that chlorophyll-a dynamics are controlled by multiple interacting environmental drivers. Overall, chlorophyll-a variability in Pekalongan Waters is shaped by the interaction of terrestrial inputs, meteorological forcing, and physical oceanographic processes. The proposed algorithm provides an effective approach for chlorophyll-a monitoring in tropical coastal waters.
10. Seasonal consistency in food selectivity of adult Euphausia pacifica in the Yellow Sea: evidence from in situ bottle incubation experiments
作者Authors: Hyunjin Yoon; Ah-Ra Ko; Caroline Tracy Shaw; Se-Jong Ju
发表月份Publication month: 2026-06 2026-06
Journal of Plankton Research · DOI: 10.1093/plankt/fbag053
关键词Tags: phytoplankton phytoplankton
摘要：太平洋磷虾是黄海的重要中营养级消费者，也是一种机会主义杂食动物，以浮游植物、原生生物、海洋雪和动物猎物（例如鱼类幼虫）为食。我们测试了成年太平洋太平洋虾的短期猎物选择性在季节之间是否存在差异，与季节性猎物可用性的关系。春季和夏季使用 200 μm 预先筛选的海水进行原位瓶孵化实验，将测试的猎物范围主要限制为超微型浮游植物、硅藻相关的微型浮游植物、自养和异养甲藻和纤毛虫。季节性猎物环境存在显着差异：春季组合显示出较高的微型浮游生物生物量和硅藻优势，而夏季组合则转向皮尺寸自养生物和较低的微型浮游生物生物量。选择性指数表明 E. pacifica始终选择微型浮游动物，特别是纤毛虫，而硅藻相关类别和微型浮游植物要么不被选择，要么显示出低放牧信号。瓶子体积比较（春季：2 升与 4 升；夏季：4 升与 10 升）表明，绝对过滤估计值对体积敏感，尽管总体定性选择性模式得以保留，但在较小的瓶子中更频繁地出现低值或非正值。这些发现表明，对 <200 μm 大小的微型浮游动物的短期选择具有季节性一致性，并建议在基于清除率的喂养估计中考虑瓶子体积的影响。
Abstract: Euphausia pacifica is a key mid-trophic consumer in the Yellow Sea and an opportunistic omnivore exploiting phytoplankton, protists, marine snow and animal prey, such as fish larvae. We tested whether the short-term prey selectivity of adult E. pacifica differed between seasons, in relation to seasonal prey availability. In situ bottle incubation experiments were conducted in spring and summer using 200 μm pre-screened seawater, restricting the tested prey spectrum mainly to picophytoplankton, diatom-related microphytoplankton, autotrophic and heterotrophic dinoflagellates and ciliates. Seasonal prey environments differed markedly: spring assemblages showed higher microplankton biomass and diatom dominance, while summer assemblages shifted toward pico-sized autotrophs and lower microplankton biomass. Electivity indices suggest that E. pacifica consistently selected microzooplankton, particularly ciliates, while diatom-related categories and picophytoplankton were either not selected or showed low grazing signals. Bottle-volume comparisons (spring: 2 vs. 4 L; summer: 4 vs. 10 L) indicated that absolute filtration estimates were volume-sensitive, with low or non-positive values occurring more frequently in smaller bottles, although the overall qualitative selectivity pattern was retained. These findings indicate seasonally consistent short-term selection for microzooplankton within the <200 μm size and suggest consideration of bottle-volume effects in clearance-based feeding estimates.
11. Identification of Harmful Algal Bloom-Causing Phytoplankton and Water Quality Status in Hurun Bay, Lampung, Indonesia
作者Authors: FARAISHA PUTRI ARIANA; Novriadi Novriadi; Yanti Ariyanti; Jeane Siswitasari Mulyana; Gres Maretta
发表月份Publication month: 2026-04 2026-04
MAXIMUS: Journal of Biological and Life Sciences · DOI: 10.35472/maximus.v4i1.2722
关键词Tags: phytoplankton; vertical structure phytoplankton; vertical structure
摘要：在受人为营养富集影响的沿海水域，有害藻华 (HAB) 的报道越来越多。本研究旨在识别楠榜胡伦湾可能引起赤潮病的浮游植物属，并评估支持的物理化学水参数。采样地点为人类活动密集区的三个地点：网箱养殖水域、滨海旅游区和港区。采用垂直拖曳法采集浮游植物样品并进行显微镜鉴定，水质参数包括温度、盐度、pH、溶解氧、硝酸盐和磷酸盐。已鉴定出九个与 HAB 相关的浮游植物属，主要为角毛藻属、细菌星藻属和菱形藻属。 营养物浓度表明存在富营养化状况，而物理参数仍处于浮游植物生长的耐受范围内。较高的营养物质和适宜的环境条件相结合表明胡润湾对HAB事件的脆弱性很高。因此，需要进行养分管理和监测，以减轻该沿海系统的生态和水产养殖风险。
Abstract: Harmful algal blooms (HABs) are increasingly reported in coastal waters influenced by anthropogenic nutrient enrichment. This study aimed to identify phytoplankton genera potentially causing HABs in Hurun Bay, Lampung, and to evaluate the supporting physical-chemical water parameters. Sampling was conducted at three sites representing areas with intensive human activities: fish cage culture waters, coastal tourism zone, and harbor area. Phytoplankton samples were collected using vertical towing methods and identified microscopically, while water quality parameters included temperature, salinity, pH, dissolved oxygen, nitrate, and phosphate. Nine phytoplankton genera associated with HABs were identified, dominated by Chaetoceros, Bacteriastrum, and Nitzschia. Nutrient concentrations indicated eutrophic conditions, while physical parameters remained within tolerance ranges for phytoplankton growth. The combination of elevated nutrients and suitable environmental conditions suggests that Hurun Bay has a high vulnerability to HAB events. Nutrient management and monitoring are therefore required to mitigate ecological and aquaculture risks in this coastal system.
