Water Biology and Security最新文献

{"title":"City bug, country bug: How do benthic macroinvertebrate assemblages respond to an urbanization gradient taxonomically and functionally?","authors":"Marden S. Linares ,&nbsp;Diego R. Macedo ,&nbsp;Robert M. Hughes ,&nbsp;Marcos Callisto","doi":"10.1016/j.watbs.2024.100343","DOIUrl":"10.1016/j.watbs.2024.100343","url":null,"abstract":"<div><div>Lotic ecosystems are especially vulnerable to the adverse effects of urbanization because of their close connectivity with the surrounding terrestrial ecosystems. There is, however, a knowledge gap in how the taxa and functions of benthic macroinvertebrate assemblages respond to a gradient of urban land use and where their tipping points are along this gradient. Thus, we quantified how urban land use in stream catchments influenced benthic macroinvertebrate assemblages functionally and taxonomically. We found that urbanization affected benthic macroinvertebrate assemblage taxa and functions at tipping points of &lt;10% of stream catchment urbanization. Greener human settlements are needed to minimize losses of sensitive macroinvertebrate taxa and their functions.</div></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"4 3","pages":"Article 100343"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inside Front cover - Contents","authors":"","doi":"10.1016/S2772-7351(25)00072-1","DOIUrl":"10.1016/S2772-7351(25)00072-1","url":null,"abstract":"","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"4 3","pages":"Article 100429"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combined intestinal transcriptome and microbiome profiling highlights microbiota involved in growth and immunity of the Reeves’ turtle (Mauremys reevesii)","authors":"Yang Xu ,&nbsp;Zhi-Ming Liu ,&nbsp;Hao-Yang Xia,&nbsp;Wei Wang,&nbsp;Xin-Lan Deng,&nbsp;Chun-Ya Wu,&nbsp;Zi-Yu Xie,&nbsp;Xin-Yu Liang,&nbsp;Tiao-Yi Xiao,&nbsp;De-Liang Li,&nbsp;Jun-Hua Li","doi":"10.1016/j.watbs.2025.100371","DOIUrl":"10.1016/j.watbs.2025.100371","url":null,"abstract":"<div><div>The intestine serves as the primary digestive and essential mucosal immune organ, harboring diverse microbiota that play crucial roles in digestion, absorption, and host immunity. However, the association between the intestinal microbiota and host growth and immunity remains insufficiently established, particularly in ectothermic animals where microbiota are easily influenced by external environments. Herein, a comparative analysis of histology, gene expression, transcriptome, and microbiome was deployed to systematically investigate the potential relevance of growth traits, immune responses, and gut microbiota between Reeves' turtles with inferior (IGP) or superior growth performance (SGP). Our results revealed that, in comparison to the IGP group, the SGP group exhibited histological intestinal structures that were more conducive to digestion and absorption, thereby aligning with its superior growth traits. Moreover, transcriptomic annotation identified 50 differentially expressed genes (DEGs) associated with growth and 70 DEGs involved in immunity. These DEGs showed significant enrichment in growth- and immunity-related GO terms and KEGG pathways. Further RT-PCR analyses validated the expression profiles of several genes related to growth and immunity across multiple tissues. In addition, analysis of microbial abundance revealed the presence of various sensitive indicator genera, such as <em>Lactobacillus</em> and <em>Brevundimonas</em>, which potentially imply host growth performance and immune response. At the phylum level, a more diverse and stable microbial interaction between intestinal microbiota in the SGP group and aquaculture water was predicted to contribute to superior growth performance and immunity. Furthermore, correlation analyses revealed a potential interplay between indicator genera with DEGs associated with growth and immune responses. Taken together, these findings highlight the intricate interplay of intestinal microbiota, environmental microbiota, as well as growth- and immunity-related genes in shaping host traits, providing valuable insights into promoting healthy culture practices for Reeves’ turtles from both molecular and microbiological perspectives.</div></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"4 3","pages":"Article 100371"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The curious case of Hypotrichidium bichromum n. sp., a new polymorphic and cannibalistic spirofilid ciliate (Ciliophora, Hypotrichia)","authors":"Atef Omar ,&nbsp;Ji Hye Moon ,&nbsp;Jae-Ho Jung","doi":"10.1016/j.watbs.2024.100344","DOIUrl":"10.1016/j.watbs.2024.100344","url":null,"abstract":"<div><div>Members of the genus <em>Hypotrichidium</em> are adapted to a planktonic lifestyle and are characterized among hypotrichs by their unique pyriform body with pointed tail and spiral cirral rows around the whole body. During a survey of Korean freshwater ciliates, we discovered a new <em>Hypotrichidium</em> species that changes its cortical granules color. Observations on the morphology and behavior of <em>Hypotrichidium bichromum</em> n. sp. revealed several other unusual features such as the polymorphic life cycle and cannibalistic behavior. When grown in a fresh culture, well-nourished specimens are characterized by a pyriform body, yellow cortical granules, and two macronuclear nodules. In declining cultures, two morphologically different morphs occur, both with ruby-red cortical granules: (1) a well-nourished morph with a pyriform body and 2–4 macronuclear nodules, which shows a cannibalistic behavior feeding on other well-nourished cells, encysting cells, and reorganizers; (2) a fast-swimming, non-feeding morph with slender body, two macronuclear nodules, and highly degenerated undulating membranes. The complete ontogenetic process of the new species is described to show the origin of each structure. Moreover, phylogenetic analyses based on 18S rRNA gene sequences show that the new species is placed in a clade containing sequences of three congeners.</div></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"4 3","pages":"Article 100344"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prey adopt similar adaptive strategies with different molecular response mechanisms: How do ciliates respond to different predation risk cues?","authors":"Yumiao Zhou ,&nbsp;Chai Li ,&nbsp;Weihuang Chen ,&nbsp;Xiaofeng Lin ,&nbsp;Jiqiu Li","doi":"10.1016/j.watbs.2025.100364","DOIUrl":"10.1016/j.watbs.2025.100364","url":null,"abstract":"<div><div>The adaptive strategies of prey against predation risk have been pivotal in non-consumptive effects. However, the adaptive strategies of prey and the response mechanisms to various predation risk cues remain unclear. We hypothesized that prey adopt a similar adaptive strategy to address different predation risks, but their response mechanisms depend on the attributes of predation risk cues. To test this hypothesis, we used <em>Didinium</em>-<em>Paramecium</em> as a predator-prey model to first evaluate the effects of various predation risk cues, including homogenates of predators (TD) and prey (TP) alone or in combination (TM), and the density of conspecific prey on the specific growth rate (SGR) to determine their adaptive strategies and their underlying response mechanisms based on transcriptomic analysis. Our results show that predation risk cues considerably enhance prey SGR, with effects in descending order of TM, TD, and TP. However, such effects gradually decrease as the density of conspecific prey increases until they disappear. The trend in the levels of differentially expressed genes (DEGs) in prey exposed to different predation risk cues is similar to that of SGRs. In particular, pathways based on DEG enrichment mediated by predation risk cues involve cellular processes, nutrient metabolism, and synthesis of biological macromolecules. However, they differ in type, number, and location within specific biological processes. In conclusion, <em>Paramecium</em> uses early reproduction strategies to address the risk of predation caused by different cues, and differences in its response mechanisms depend on the attributes of the cues of predation risk, resulting in differences in the SGR of the prey.</div></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"4 3","pages":"Article 100364"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Confronting the “knowledge-action gap” in invasive species prevention: A study of biosecurity behaviors among aquarium hobbyists in Illinois, USA","authors":"Elizabeth J. Golebie ,&nbsp;Carena J. van Riper ,&nbsp;Greg Hitzroth ,&nbsp;North Joffe-Nelson","doi":"10.1016/j.watbs.2024.100337","DOIUrl":"10.1016/j.watbs.2024.100337","url":null,"abstract":"<div><div>Biological invasions threaten water resources worldwide owing to interrelated biological and anthropogenic drivers of change. Though the role of people in the (un)intentional spread of aquatic invasive species is increasingly recognized as a priority, there are widespread assumptions about the importance of public awareness in explaining biosecurity behaviors. A disconnect exists between what people think and what they do—as articulated by the simple but powerful “knowledge-action” gap—that warrants attention to clarify how environmental social science research can most effectively advance invasive species prevention. Using survey data collected from aquarium hobbyists in the U.S. state of Illinois, we investigated the role of belief systems in shaping intentions to engage in biosecurity behaviors, such as purchasing only native species as pets. We also examined how beliefs were rooted in multiple forms of knowledge. Self-efficacy was the strongest driver of intended biosecurity behavior, whereas both perceived benefits and risk perceptions were instrumental in explaining hobbyists’ decisions. Beliefs were informed by two types of reported knowledge, which in turn, were influenced by a range of information sources. Our results suggest that a more nuanced conceptualization of public awareness is urgently needed given its critical but often misunderstood role in the formation of beliefs that influence participation in biosecurity behaviors. Knowledge of both biological invasions and biosecurity behaviors, in addition to information sources, needs to be distinguished in future research. These multiple forms of knowledge serve as the foundation for belief systems that activate behavior change among aquarium hobbyists. We also argue that science communication and outreach campaigns that highlight the risks of invasive species while strengthening self-efficacy and perceived benefits of prevention will be the most effective pathways for fostering hobbyist engagement in biosecurity behaviors.</div></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"4 3","pages":"Article 100337"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Underwater noise in the Xinluo reserve: A potential stressor for the critically endangered Yangtze finless porpoise","authors":"Yi-Ning Yang ,&nbsp;Yu-Wei Chen ,&nbsp;Hao-Ran Ji ,&nbsp;Peng-Xiang Duan ,&nbsp;Sara Platto ,&nbsp;Wei-Lun Li ,&nbsp;Yuan-Hui Xiong ,&nbsp;Fei Fan ,&nbsp;Jian-Zhong Shen ,&nbsp;Ke-Xiong Wang ,&nbsp;Ding Wang","doi":"10.1016/j.watbs.2024.100342","DOIUrl":"10.1016/j.watbs.2024.100342","url":null,"abstract":"<div><div>Nature reserves in the Yangtze River, China, are crucial for protecting the Yangtze finless porpoise (<em>Neophocaena asiaeorientalis asiaeorientalis</em>) and their habitats. Despite a 10-year fishing ban along the middle and lower reaches of the Yangtze River instated on January 2020 to alleviate pressures on the porpoise's prey, other stressors, particularly underwater noise, continue to impact these rare cetaceans, which rely heavily on vocalization for prey detection, communication and navigation. Between September 2020 and September 2021, underwater noise monitoring was carried out in the Xinluo Baiji National Nature Reserve, located in Hubei province, China, with the aim of assessing the potential impact of underwater noise pollution on the Yangtze finless porpoise. The reserve was divided into 30 sub-sections to systematically monitor underwater noise across the reserve. Passive acoustic monitoring was conducted at each site within these sub-sections during four sampling periods, and these data were subjected to comparative analysis with data collected in 2012 and 2017. The results showed that the root mean square sound pressure levels at each site ranged from 117 to 162 ​dB. Power spectral levels (11.2–152 ​kHz) exceeded the average audiogram levels for the porpoise at most sites. 94.2% and 93.3% of the sites exceeded underwater acoustic thresholds known to induce a hearing threshold shift for the porpoise in terms of both the averaged cumulative unweighted sound exposure level, and cumulative weighted sound exposure level respectively. Noise levels in this section during 2020–2021 were approximately 25 and 30 ​dB higher compared to the levels recorded in 2012 and 2017, and likely due to increased shipping activity and the proximity of sampling sites to the shipping channel. The rise in noise levels might contribute to the observed declines in the porpoise population within this area. To mitigate these impacts, implementing noise control measures is essential, such as regulating navigation speed and limiting the number of vessels in the reserve.</div></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"4 3","pages":"Article 100342"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A temperature-induced sex reversal mechanism in ricefield eels","authors":"Yimin Zhang ,&nbsp;Tingting Luo ,&nbsp;Yuhua Sun","doi":"10.1016/j.watbs.2025.100360","DOIUrl":"10.1016/j.watbs.2025.100360","url":null,"abstract":"<div><div>The ricefield eel (<em>Monopterus albus</em>), a protogynous hermaphrodite, is an important aquaculture freshwater fish in China. Intensive studies have focused on the sex reversal of this species, but the underlying mechanisms remain elusive. We performed comparative transcriptome analysis for gonadal tissues of female, intersex, and male ricefield eels. The results suggest that temperature may play a role in inducing the sex reversal. Moreover, an epithelial-mesenchymal transition (EMT) gene signature was found, suggesting an involvement of germinal epithelium in contributing to gonadal transformation. Our <em>in vitro</em> and <em>in vivo</em> experiments show that thermal cues are sensed by thermosensors such as Trpv4 in the gonadal cells of ricefield eels, which can be transduced to the sex determination cascades. The epithelial cells of germinal epithelium can become Sertoli cells via an EMT. Our study provides new insights into the molecular mechanisms underlying the sex reversal of ricefield eels.</div></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"4 3","pages":"Article 100360"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Key environmental factors determining life history strategies of river fishes and their historical changes in the Yangtze River","authors":"Lan Zhu ,&nbsp;Dan Yu ,&nbsp;Martin Reichard ,&nbsp;Mingzheng Li ,&nbsp;Jiaxin Gao ,&nbsp;Huanzhang Liu","doi":"10.1016/j.watbs.2025.100376","DOIUrl":"10.1016/j.watbs.2025.100376","url":null,"abstract":"<div><div>Life history theory predicts that species-specific life history traits are shaped by variations in environmental conditions. Understanding the key environmental factors determining life history strategies can provide insights into the mechanisms of community assembly and identify potential biodiversity threats by predicting selective responses to environmental perturbations. We collected life history traits for fish species from 14 river basins across 5 continents to identify their life history strategies and explore the related key environmental factors. Our results showed that fishes from all the river basins conformed to a triangular life history strategy model including periodic, opportunistic, and equilibrium endpoints. However, the proportions of these three strategies varied significantly amongst river basins. For example, the Rhine River basin had a high proportion of fish with the periodic strategy and a low proportion of fish with the opportunistic strategy, whereas the Mississippi River basin displayed the opposite pattern. At the river basin extent, linear regression analysis revealed that the proportion of species with the opportunistic strategy increased with mean annual temperature, annual variation in river discharge, and annual precipitation, and was negatively associated with latitude. In contrast, species with the periodic strategy were negatively related to annual variation in river discharge and positively with latitude. These findings corroborate that opportunistic species are adapted to unpredictable environments, whereas periodic species are adapted to predictable environments. We then used molecular phylogeny to reconstruct the ancestral state of Yangtze fishes and analyzed the percentage composition of the three life history strategies across geological times. We found dominance of the equilibrium strategy in the Upper Cretaceous followed by dominance of periodic fishes before the Paleocene. Opportunistic fish species began to dominate the Yangtze River basin after the Miocene, with more than half of the fish species being opportunistic. This implies that the environmental conditions in the Yangtze River basin evolved from stable (low annual variation in river discharge) to unstable (high annual variation in river discharge and high annual precipitation) states, possibly associated with the onset of seasonality expressed as prevalence of a monsoon climate and the overall alteration of precipitation patterns. Life history theory can give hints for assessing river ecological conditions because changes in strategy proportions may indicate the alteration of environmental conditions. Such changes can aid in developing suitable strategies for river ecological protection and fish resource management.</div></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"4 3","pages":"Article 100376"},"PeriodicalIF":5.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Land use extent and intensity affect the trophic structure of apex fish in neotropical lagoons","authors":"Vinícius Andrade Urbano ,&nbsp;Gustavo Henrique Zaia Alves ,&nbsp;Evanilde Benedito","doi":"10.1016/j.watbs.2025.100415","DOIUrl":"10.1016/j.watbs.2025.100415","url":null,"abstract":"<div><div>The conversion of natural ecosystems to human land use is a primary cause of worldwide biodiversity loss and trophic structure changes in ecosystems. We investigated the effect of human land use at different spatial extents and aquatic trophic state on basal energy sources, food chain length (FCL), and the isotopic niche of apex fish in four large neotropical wetlands. We had two hypotheses. (i) Increased regional human land is negatively associated with the contributions of allochthonous energy sources, FCL, and isotopic niche. (ii) Trophic state is directly associated with FCL, autochthonous energy source, and niche area. We found that C₃ riparian vegetation was the primary energy source for apex consumers. Human land uses in a 5000 ​m buffer were directly associated with allochthonous basal-energy source assimilation and niche area and indirectly with FCL. FCL was shorter in environments with more human land use and allochthonous energy source assimilation had an important role on FCL. Therefore, conserving riparian vegetation surrounding water bodies is a crucial protective factor for waters, as it serves as a primary energy source for food webs. Decreased FCL with increased human activity demonstrated the sensitivity of these environments to trophic-link losses from human invasion. Conversely, increased isotopic niche areas in environments with high human activities may be attributed to the introduction of new energy sources from those activities. Hence, the loss of natural cover resulting from human activities is an important factor in aquatic trophic structure changes.</div></div>","PeriodicalId":101277,"journal":{"name":"Water Biology and Security","volume":"4 4","pages":"Article 100415"},"PeriodicalIF":4.4,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}