ACS Environmental Au最新文献

Reporting Chemical Data in the Environmental Sciences 报告环境科学中的化学数据

IF 7.7

ACS Environmental Au Pub Date : 2025-07-29 DOI: 10.1021/acsenvironau.5c00034

Sivani Baskaran*, Parviel Chirsir, Shira Joudan, Raoul Wolf, Evan E. Bolton, Paul A. Thiessen and Emma L. Schymanski,

引用次数: 0

Disentangling the Impacts of PAHs, Microplastics, and Sediment Resuspension on Algal Physiology: A Partial Least Squares Structural Equation Modeling Approach 多环芳烃、微塑料和沉积物再悬浮对藻类生理的影响：偏最小二乘结构方程建模方法

IF 7.7

ACS Environmental Au Pub Date : 2025-07-23 DOI: 10.1021/acsenvironau.5c00060

Hoi Shing Lo*, Betty Chaumet, Alyssa Azaroff, Anna Sobek, Sofi Jonsson and Elena Gorokhova*,

{"title":"Disentangling the Impacts of PAHs, Microplastics, and Sediment Resuspension on Algal Physiology: A Partial Least Squares Structural Equation Modeling Approach","authors":"Hoi Shing Lo*, Betty Chaumet, Alyssa Azaroff, Anna Sobek, Sofi Jonsson and Elena Gorokhova*, ","doi":"10.1021/acsenvironau.5c00060","DOIUrl":"https://doi.org/10.1021/acsenvironau.5c00060","url":null,"abstract":"Environmental stressors, such as contaminants and physical factors, rarely act in isolation, and studying their joint effects provides a more accurate reflection of real-world scenarios. To capture these interactions and disentangle the direct and indirect influences on algal responses, we applied partial least squares structural equation modeling (PLS-SEM), allowing us to reveal the hierarchical relationships among stressors and their cumulative impact on algal physiology. We examined combined effects of microplastics (MP; presence/absence), polycyclic aromatic hydrocarbons (PAHs; a mixture of acenaphthene, fluorene, phenanthrene, and fluoranthene at a total chemical activity in the sediment of 0 or 0.14), and sediment resuspension (turbidity: 0.8–3.9 NTU) on Ceramium tenuicorne, a coastal macroalga that is likely to encounter all these stressors in its natural habitats. Mechanical mixing at two intensities (low and high) was applied as an experimental treatment to induce resuspension. The analysis separated the effects of mechanical mixing and turbidity, given their nonlinear relationship, as stronger mechanical mixing did not consistently result in proportional turbidity increases. The algal physiological responses were evaluated using changes in pigment composition (Chl a, Chl c, and carotenoids), photosystem II (PSII) performance, total antioxidant capacity, and algal stoichiometry measured as elemental (%C, %N, %H, and C/N) ratios. We found that PAH exposure was the main suppressor of pigment concentrations and PSII performance, underscoring the mechanisms of its adverse effects on the photosynthetic machinery and nutrient assimilation. Moreover, stronger turbulence further decreased pigment concentrations, while sediment resuspension increased antioxidant capacity in algae, possibly due to physical damage from abrasion and scouring. We also found that MP addition significantly increased turbidity, thus aggravating the effects of the sediment resuspension. In conclusion, we provide a mechanistic explanation of how the combined exposure to MPs, PAHs, and sediment resuspension can impact pigment composition, photosynthesis, and stoichiometry of the algae, leading to decreased productivity.","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":"5 5","pages":"490–500"},"PeriodicalIF":7.7,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsenvironau.5c00060","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145094391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From Water to Web: Trophic Transfer of Neonicotinoids from a Wastewater Effluent-Dominated Stream to Riparian Spiders 从水到网：新烟碱类从废水为主的河流到河岸蜘蛛的营养转移

IF 7.7

ACS Environmental Au Pub Date : 2025-07-22 DOI: 10.1021/acsenvironau.5c00021

Alyssa L. Mianecki, Jonathan R. Behrens, Dana W. Kolpin, Grant R. Hemphill, Krisha Kapoor and Gregory H. LeFevre*,

{"title":"From Water to Web: Trophic Transfer of Neonicotinoids from a Wastewater Effluent-Dominated Stream to Riparian Spiders","authors":"Alyssa L. Mianecki, Jonathan R. Behrens, Dana W. Kolpin, Grant R. Hemphill, Krisha Kapoor and Gregory H. LeFevre*, ","doi":"10.1021/acsenvironau.5c00021","DOIUrl":"https://doi.org/10.1021/acsenvironau.5c00021","url":null,"abstract":"Municipal wastewater is a known point source of organic contaminants, including pharmaceuticals and neonicotinoid insecticides. Emergent aquatic insects can provide a direct aquatic-to-terrestrial contaminant transfer route to the food web, with implications for terrestrial food web dispersal of wastewater-derived organic contaminants. We quantified 17 target pharmaceuticals and insecticides (log Kow: −1.43 to 4.75) in surface water, fish, aquatic insects, and web-building riparian spiders at a wastewater effluent-dominated stream in eastern Iowa, USA. Two neonicotinoids, imidacloprid and clothianidin, had spider tissue concentrations of 8.9–84 ng/g and 1.2–11 ng/g, respectively. The imidacloprid/clothianidin ratios in spider tissues were reflective of the concentration ratios in the effluent-dominated streamwater and opposite of nearby agriculturally dominated waters. In contrast, no pharmaceuticals were detectable in the riparian spiders; however, only pharmaceuticals were present in both fish and aquatic insects (1.1–11 ng/g and 5.9–51 ng/g, respectively). Neonicotinoids are not predicted to enter aquatic food webs based on their log Kow and bioconcentration factor values; therefore, an implication of this study is to warrant caution when using traditional bioaccumulation models for polar hydrophilic contaminants. This work provides further evidence that neonicotinoids undergo trophic transfer and represents the initial measurements, implicating such a transfer from effluent-dominated streams into terrestrial food webs. While this study emphasizes field-relevant observations, it is limited by environmental variability, including uncertainties in the biomass of emergent insects that likely contribute to spider diets. Future research could investigate contaminant metabolites within individual organisms or use complementary techniques to better understand the underlying mechanisms.","PeriodicalId":29801,"journal":{"name":"ACS Environmental Au","volume":"5 5","pages":"457–467"},"PeriodicalIF":7.7,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsenvironau.5c00021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145094390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

IF 6.7