Aquatic Ecology最新文献

{"title":"Habitat connectivity and physicochemical gradients shape nekton assemblage across the seagrass-mangrove continuum in Bangka Island, Indonesia","authors":"Ahmad Romdon,&nbsp;Agung Yunanto,&nbsp;Tri Handayani,&nbsp;Frida Sidik,&nbsp;Ernawati Widyastuti,&nbsp;Faisal Hamzah,&nbsp;Jemi Ferizal,&nbsp;Wahyu Adi,&nbsp;Chao Fang,&nbsp;Jianguo Du,&nbsp;Annisa Fitri,&nbsp;Jordi Anugrah Lumban Raja,&nbsp;Juanda Nikola Pratama,&nbsp; Sugandi,&nbsp;Muhammad Thoriq Adha","doi":"10.1007/s10452-026-10310-5","DOIUrl":"10.1007/s10452-026-10310-5","url":null,"abstract":"<div><p>Marine and coastal ecosystems are highly interconnected, supporting vital ecological functions and fisheries services. Habitat loss and degradation threaten these services, especially in tropical areas. This study examined physicochemical variation, habitat structure, and nekton communities across three islands (Panjang, Semujur, and Ketawai) in Bangka, Indonesia, where a long-term exposure to tin mining activities exists. Hydrographic mapping revealed contrasting environmental regimes: nutrient-rich, turbid waters at Panjang; oligotrophic, well-flushed conditions at Semujur; and transitional features at Ketawai. Habitat surveys identified seven seagrass and four mangrove species, with notable differences among islands (PERMANOVA, <i>p</i> = 0.002). Nekton sampling found 34 species, with community composition differing significantly (PERMANOVA, <i>p</i> = 0.001). Indicator species analysis identified spatially structured taxa, including <i>Acreichthys tomentosus</i>, <i>Lethrinus obsoletus</i>, and <i>Atherinomorus lacunosus</i>. Redundancy analysis (RDA) indicated nekton communities were linked to habitat structure and abiotic factors (F = 1.82, <i>p</i> = 0.029), with <i>Thalassia hemprichii</i>, salinity, and <i>Halodule pinifolia</i> as key drivers. Nutrient enrichment near Panjang may result from sediment resuspension and mining-related runoff, though these mechanisms were not directly measured. Overall, findings suggest that nekton communities are shaped by habitat co-occurrence and physicochemical variability, underscoring the importance of maintaining habitat integrity and informing future conservation efforts amid human impacts.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"60 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physical mixing buffers heatwave-induced suppression of phytoplankton growth: evidence from a mesocosm experiment","authors":"Man Xiao,&nbsp;Surui Zhang,&nbsp;Jing Lu,&nbsp;Enjun Liu,&nbsp;Jianming Deng,&nbsp;Zhenhua Yan,&nbsp;Guangwei Zhu","doi":"10.1007/s10452-026-10313-2","DOIUrl":"10.1007/s10452-026-10313-2","url":null,"abstract":"<div><p>Despite growing evidence that heatwaves and physical mixing jointly regulate phytoplankton dynamics, their interactive effects during early-season warming events remain poorly understood. To address this gap, we conducted a mesocosm experiment simulating a short-term spring heatwave under contrasting mixing regimes. Our results showed that phytoplankton growth rates declined sharply during the first two days of the heatwave (mean: − 0.38 d⁻¹), indicating that acute thermal stress imposed immediate constraints on population growth. In the absence of mixing, heatwave conditions led to a sustained decline in cell concentration. In contrast, physical mixing significantly alleviated this suppression, increasing growth rates over the 0–6 day period from − 0.33 to − 0.12 d⁻¹. Multivariate regression further showed that the accumulation of total biovolume was primarily promoted by phosphorus availability under intermediate mixing conditions, while being negatively related to surface warming intensity. These findings suggest that physical mixing acts as a critical buffering mechanism against heatwave-induced suppression of phytoplankton growth by weakening thermal stratification and promoting vertical nutrient exchange. Overall, this study highlights the importance of considering interactions between physical mixing and thermal stress, particularly within a seasonal context, when assessing ecosystem responses to increasingly frequent heatwaves under climate change.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"60 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental predictors of fish assemblages in insular streams of the eastern Amazon","authors":"Matheus S. de Almeida,&nbsp;Luciano F. A. Montag,&nbsp;Jean C. G. Ortega,&nbsp;Leandro Juen,&nbsp;Thaisa S. Michelan,&nbsp;Ronaldo S. da Silva,&nbsp;Márcio J. da Silva,&nbsp;Marina B. Mendonça,&nbsp;Dennys G. Amador,&nbsp;Bruno S. Prudente","doi":"10.1007/s10452-026-10308-z","DOIUrl":"10.1007/s10452-026-10308-z","url":null,"abstract":"<div><p>Understanding fish species distributions remains a key challenge in ecology, particularly in complex environments such as small Amazonian streams. These data are essential for developing and supporting effective management and conservation strategies, especially in highly diverse regions like the Amazon Basin, where substantial gaps in biodiversity knowledge persist. We assessed the structure and composition of fish assemblages in 22 intra-insular streams in the Marajó Archipelago, eastern Brazilian Amazon, testing their responses to local environmental conditions (i.e., environmental variables), land use and land cover, and fluvial distances between streams. Sampling occurred during the dry season, in October 2022 and June 2023. Relationships between assemblage structure and predictors were analyzed using Linear Models and Redundancy Analysis (RDA). We collected 7813 individuals representing 54 species, 26 families, and nine orders. The linear model explained 79% of the variation in species richness, with canopy cover, temperature, pH, and forest cover as key predictors. RDA indicated local environmental conditions as the main drivers of species composition. These findings highlight the need to account for multiple environmental gradients in Amazonian fish conservation.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"60 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10452-026-10308-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148009148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Depth and substrate shape the ecology of pen-shell Atrina vexillum in coral reef lagoons","authors":"Thomas Guttierez,&nbsp;Camille Gache,&nbsp;Serge Planes","doi":"10.1007/s10452-026-10291-5","DOIUrl":"10.1007/s10452-026-10291-5","url":null,"abstract":"<div><p>Understanding how environmental gradients shape species distributions is essential for managing coral reef lagoons, where habitat heterogeneity drives benthic biodiversity. This study aims to establish the ecological baseline for the pen shell <i>Atrina vexillum</i> in the Society Archipelago (French Polynesia) by identifying the environmental factors structuring its distribution, size variation, and habitat use. Specifically, we tested whether depth and substrate jointly influence occurrence and shell size, and whether settlement patterns deviate from habitat availability across islands. Using stratified underwater surveys, we recorded over 2600 individuals and measured shell width, depth, and substrate type. Habitat-use analyses revealed non-random settlement patterns: coral substrates were consistently under-used relative to availability, while sand and muddy-sand were more used, sometime mixed with branching corals, with significant island-specific deviations from availability (χ² tests, <i>p</i> &lt; 0.001). Shell width showed a weak positive association with depth (<i>ρ</i> = 0.26, <i>p</i> &lt; 0.001), an effect mainly driven by Bora-Bora where a pronounced depth gradient was sampled; other islands showed limited or no detectable depth-related size differences. Although abundance varied by more than an order of magnitude among islands, size distributions were mostly unimodal, a pattern consistent with continuous recruitment, but without clear evidence of recent, distinct cohorts. These findings identify <i>A. vexillum</i> as a key component of soft-bottom communities when they occur in numbers whose distribution and morphology are shaped by geomorphology. Recognizing its role as a sediment-stabilizing, filter-feeding ecosystem engineer can inform lagoon zoning and conservation strategies aimed at sustaining benthic functions and resilience in Polynesian reef ecosystems.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"60 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10452-026-10291-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147938792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of perfluorooctanesulfonic acid (PFOS) on phytoplankton community and physiological responses","authors":"Suleiman Dauda,&nbsp;Yillek Simon Gotan,&nbsp;Sadiya Awala Samuel,&nbsp;Adriana Sturion Lorenzi,&nbsp;Zainab Abdullahi Ibrahim,&nbsp;Dora Nguemo Iortsuun,&nbsp;Mathias Ahii Chia","doi":"10.1007/s10452-026-10305-2","DOIUrl":"10.1007/s10452-026-10305-2","url":null,"abstract":"<div><p>Perfluorooctanesulfonic acid (PFOS), a persistent and bioaccumulative substance, has emerged as a major environmental contaminant of global concern. PFOS, widely used in industry and consumer products, is common in aquatic ecosystems and may harm primary producers like phytoplankton, though its effects on their community structure and physiology remain unclear. Here, we investigated the impact of PFOS on freshwater physicochemical parameters, phytoplankton community dynamics, biochemical composition, and oxidative stress responses in a mesocosm experiment over a 28-day period. The water quality indicators generally were unaltered by PFOS exposure, but phosphate levels decreased initially in the control. Phytoplankton biomass (cell density) decreased at 10 µg L⁻¹ and 10 mg L⁻¹ PFOS exposures. Phytoplankton species richness, Shannon, and Simpson diversity indices declined at 10 mg L⁻¹, with communities at this concentration becoming distinctly different from the control and lower PFOS treatments by day 28. This shift in community structure was primarily driven by taxa such as <i>Chlorogonium</i> sp. and <i>Microcystis aeruginosa</i>, which contributed strongly to the observed compositional dissimilarity. Proteins content in the phytoplankton increased under PFOS exposure, peaking on day 21. In contrast, carbohydrate and lipid contents were reduced under PFOS relative to the control. PFOS exposure elevated glutathione-S-transferase activity, malondialdehyde, and hydrogen peroxide levels, whereas peroxidase activity was reduced. The phytoplankton biomass and lipids were positively associated, while oxidative stress markers were closely linked with high PFOS concentrations. Overall, these results highlight that PFOS exposure suppressed phytoplankton biomass, altered their community composition, and induced oxidative stress and metabolic shift at higher concentrations, highlighting its potential ecological risk in freshwater systems.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"60 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10452-026-10305-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147937764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Macrofauna community structure in extreme temperature and hypersaline waters: Khor Al-Adaid, Arabian Gulf","authors":"Fatima A. Al-Khayat,&nbsp;Prerana Shet,&nbsp;Mandar Nanajkar,&nbsp;N. Sithranga Boopathy,&nbsp;P. Vethamony,&nbsp;Jassim A. Al-Khayat","doi":"10.1007/s10452-026-10281-7","DOIUrl":"10.1007/s10452-026-10281-7","url":null,"abstract":"<div><p>The Arabian Gulf experiences extreme seasonal fluctuations in temperature and salinity, imposing strong environmental filters on benthic ecosystems. This study examined the seasonal dynamics of macrobenthic communities in the hypersaline lagoon Khor‑Al‑Adaid, Qatar, to determine how physicochemical variability shapes species composition, diversity, and functional structure. Across four seasons, 108 macrobenthic taxa were recorded, with polychaetes representing the dominant group. Macrofaunal abundance peaked in winter (1774 ind. m⁻²) and it was lower in summer (703 ind. m⁻²), whereas species richness was higher in summer (47 species). Diversity indices varied seasonally (H′ = 1.23–1.52; d = 3.7–5.3; J′ = 0.40–0.46), reflecting shifts in community structure under extreme summer hyper salinity and temperature. Multivariate analyses (cluster analysis, SIMPER, k‑dominance curves, and RDA) revealed clear seasonal separation of assemblages, with winter communities associated with higher dissolved oxygen and chlorophyll‑a, and summer communities linked to thermal and salinity stress. Overall, the results demonstrate that extreme physicochemical conditions strongly regulate benthic community patterns in this lagoon system, providing an essential ecological baseline for monitoring and conservation in hypersaline environments of the Arabian Gulf.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"60 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10452-026-10281-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fishery-derived plastic pollution: global inventory, eco-toxicological impacts, and governance challenges","authors":"Fang Ma,&nbsp;Xiangjun Zhou","doi":"10.1007/s10452-026-10304-3","DOIUrl":"10.1007/s10452-026-10304-3","url":null,"abstract":"<div><p>Plastic pollution originating from fisheries constitutes a significant ecological and socio-economic threat to marine ecosystems worldwide. This systematic, narrative review synthesizes current global evidence to address several key questions: the primary sources and pathways of fishery-derived plastics, their ecological consequences, and the associated governance challenges and potential solutions. By analyzing recent scientific literature (primarily from the 2010s onward), we find that fishing activities significantly contribute to marine plastic pollution via abandoned, lost, or otherwise discarded fishing gear (ALDFG), packaging waste, and operational losses, with estimated annual inputs reaching 640,000 tons. Composed largely of durable polymers such as polypropylene (PP) and polyethylene (PE), these materials can persist in marine environments for decades to centuries, gradually fragmenting into microplastics and leaching hazardous additives. Spatial analyses compiled from the literature indicate consistent accumulation patterns in nearshore fishing grounds, subtropical gyres, and deep-sea basins—driven by oceanic currents and biofouling-mediated sinking. Ecological impacts range from ghost fishing that indiscriminately kills marine organisms, to physical habitat degradation (coral reef damage), and the bioaccumulation of plastic-associated pollutants—including chemical additives (plasticizers, flame retardants) and adsorbed persistent organic pollutants and heavy metals—through marine food webs. Endangered species such as sea turtles, seabirds, and marine mammals experience high entanglement-related mortality, while benthic ecosystems sustain long-term harm. Socio-economic effects include reduced fishery yields, higher gear maintenance costs, and diminished market value of contaminated seafood. This synthesis highlights that, despite some regional management successes, a critical governance gap remains in implementing integrated, globally coordinated strategies that effectively connect policy, technology, economic instruments, and community engagement. Moving forward, research should prioritize long-term ecological monitoring, advances in cleanup technology, and circular economy approaches to mitigate this pervasive environmental threat. Achieving a balance between fishery sustainability and marine conservation will require sustained collaboration among scientists, policymakers, industry, and civil society.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"60 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147829208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Patterns of plastic ingestion linked to feeding ecology in three ray species from southern Brazil","authors":"João Pedro Cavalcante Martins,&nbsp;Diego José Nogueira,&nbsp;Miguel Saldaña-Serrano,&nbsp;Raimara de Souza Gomes,&nbsp;Andreia Neves Fernandes,&nbsp;Afonso Celso Dias Bainy,&nbsp;Renato Hajenius Aché de Freitas","doi":"10.1007/s10452-026-10297-z","DOIUrl":"10.1007/s10452-026-10297-z","url":null,"abstract":"<div><p>The accumulation of plastics in the marine environment constitutes an increasing threat to biodiversity due to accidental ingestion and bioaccumulation along food webs. While plastic contamination has been widely documented in mollusks and fishes, gaps remain regarding elasmobranchs, ecologically relevant groups vulnerable to marine pollution. This study assessed plastic particle ingestion in three ray species with contrasting ecological habits <i>Dasyatis hypostigma</i>, <i>Myliobatis freminvillei</i>, and <i>Sympterygia bonapartii</i> incidentally captured in Florianópolis, southern Brazil, testing whether habitat use and feeding strategy influence contamination patterns among species and tissues. Stomach and gills from 28 individuals were analyzed using alkaline digestion, membrane filtration, stereomicroscopy, and <i>µ</i>-FTIR spectroscopy. A total of 152 plastic particles were detected, predominantly micro- and mesoplastics, with 98% fibers. No significant interspecific differences in overall plastic abundance were observed; however, particle size and polymer composition differed significantly among species. The benthic <i>S. bonapartii</i> retained smaller, sediment-associated particles, whereas the pelagic <i>M. freminvillei</i> was associated with low-density polymers and fibers typical of the water column, likely linked to fishing activities. Plastic particles were more frequent in stomachs than in gills, indicating distinct dietary and waterborne exposure pathways. These findings indicate that habitat use and foraging strategy influence primarily the type and size, rather than the abundance, of ingested plastics. This study provides the first records of plastic ingestion for these ray species in southern Brazil, highlighting the importance of species ecology in assessments of marine plastic contamination.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"60 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lacustrine metacommunities at large spatial extents are mainly related to spatially structured environmental variables and to broad-scale spatial variables","authors":"Carlos H. L. Liborio","doi":"10.1007/s10452-026-10303-4","DOIUrl":"10.1007/s10452-026-10303-4","url":null,"abstract":"<div><p>The structure of metacommunities has been attributed mainly to local (e.g., abiotic conditions and biotic interactions) and spatial factors (e.g., dispersal limitation and mass effect). However, our knowledge of the relative roles of these factors in structuring metacommunities at large spatial extents is unknown, especially using fine-grained data. Using a large data set from lakes covering the continental United States of America and encompassing phytoplankton, zooplankton, and macroinvertebrate communities, I assessed the relative importance of local environmental factors, climatic, and spatial variables using variance partitioning procedures. The phytoplankton metacommunity exhibited a strong spatial structure, whereas the zooplankton and macroinvertebrates metacommunities were mainly related to spatially structured environmental variables. In general, these results did not align with the expectations that small-bodied communities—with high dispersal ability—would be mainly related to local environmental factors and that relatively large-bodied communities – with low dispersal ability—would be associated primarily with spatial processes.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"60 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10452-026-10303-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147797075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The population dynamics of chironomid midges in Lake Mývatn, Iceland","authors":"Árni Einarsson,&nbsp;Elisabet Ragna Hannesdóttir,&nbsp;Gísli Már Gíslason,&nbsp;Kristbjörg Halldórsdóttir,&nbsp;Thóra Hrafnsdóttir,&nbsp;Jón S. Ólafsson,&nbsp;Anthony R. Ives","doi":"10.1007/s10452-026-10294-2","DOIUrl":"10.1007/s10452-026-10294-2","url":null,"abstract":"<div><p>Lake Mývatn experiences remarkable fluctuations in the populations of many of its 37 midge species. Here, we analyzed data from four adult traps from 1977 to 2023, and nine traps from 1999 to 2023, to characterize the annual dynamics of individual midge species, patterns of trends and cyclicity, synchrony among their fluctuations, and changes in community composition. Eighteen of the 20 common species from the 1977–2023 dataset showed quasi-periodic dynamics with periods of either 3–4 or 6–8 years. Furthermore, 12/20 species showed significant declines in abundance, while only one showed a significant increase. Although many pairs of species fluctuated in synchrony, synchrony was not greater for taxonomically related species. However, species that were more likely to have high adult abundances at the same locations (traps) were more likely to show synchrony. Finally, at the community level, a single species, <i>Tanytarsus gracilentus</i>, was associated with changes in the species composition of midges in Mývatn through time, while another common species, <i>Cricotopus sylvestris</i>, was primarily responsible for differences in community composition in space; differences occurred among traps from the two basins of Mývatn and along the Laxá outlet river. The prevalence of quasi-periodicity and synchrony in the dynamics among species suggests that many species share the same drivers of population fluctuations. We discuss the possible drivers, and although we can use the data to exclude some possible explanations of midge population dynamics, the data do not reveal a single explanation as best. Our results show the value of high-quality, long-term data on communities of organisms for revealing the existence of species-species and species-environment interactions that link the dynamics of species within the community and generate spatiotemporal changes in community composition.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"60 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10452-026-10294-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147796508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}