Aquatic Ecology最新文献

{"title":"Soil amendment leads to shifts in the rhizosphere microbial community and promotes Myriophyllum spicatum growth: a salinized aquatic system mesocosm experiment","authors":"Qing Ren,&nbsp;Shangsheng Sun,&nbsp;Yuqing Su,&nbsp;Qi Ding,&nbsp;Houtao Xu,&nbsp;Lian Shuang,&nbsp;Erik Jeppesen,&nbsp;Wei Zhang,&nbsp;Liqing Wang","doi":"10.1007/s10452-025-10185-y","DOIUrl":"10.1007/s10452-025-10185-y","url":null,"abstract":"<div><p>The escalating salinization of lakes and wetlands is reducing the ecological functions of these ecosystems and undermines the survival and diversity of aquatic macrophytes. Although the application of amendments has been shown to efficiently alleviate the salinization of terrestrial ecosystems, their improvement effects on saline aquatic ecosystems are yet to be fully understood. We conducted mesocosms experiment to investigate the effects of three soil amendment treatments—biochar, desulfurized gypsum, and zeolite powder—on saline sediment and the submerged macrophyte <i>Myriophyllum spicatum</i>. The results showed that all three amendments effectively reduced salinity and pH in both the sediment and water column, thereby alleviating salt stress on <i>M. spicatum</i>, decreased the levels of antioxidant enzymes and significantly enhanced the growth of <i>M. spicatum</i>. The biochar treatment showed the most pronounced improvements, with a 34% reduction in sediment salinity and a 46% increase in macrophyte root length. High-throughput sequencing results revealed that the rhizosphere microorganisms in the biochar-amended group had a higher OTU diversity compared to the other groups. LEfSe analysis further revealed that biochar increased the abundance of the key functional microbial groups responsible for organic matter decomposition and the nitrogen and phosphorus cycles, such as Microscillaceae, Promicromonospora, and Arthrobacter. Structural equation modeling analysis suggested that desulfurized gypsum and zeolite powder primarily improved sediment physical properties, while biochar had both a direct effect by promoting macrophyte growth and an indirect effect through water and sediment quality amelioration. Our study provides information on the effectiveness of various soil amendments for habitat improvement in brackish wetlands and offers valuable insights for macrophyte restoration in specific habitats.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"643 - 656"},"PeriodicalIF":1.7,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073739","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":"Top-down control: microzooplankton grazing impact on phytoplankton biomass and community composition in a tropical monsoon driven lagoon, Chilika, India","authors":"Sambit Singh,&nbsp;Susmita Raulo,&nbsp;Tamoghna Acharyya,&nbsp;Anu Gopinath,&nbsp;Pradipta R. Muduli,&nbsp;Deepak R. Mishra,&nbsp;Gurdeep Rastogi","doi":"10.1007/s10452-025-10184-z","DOIUrl":"10.1007/s10452-025-10184-z","url":null,"abstract":"<div><p>Dilution experiments were conducted to estimate the microzooplankton (MZP) grazing rate and phytoplankton growth rate in Chilika Lagoon during the summer and winter seasons. The phytoplankton growth rate ranged between 0.71 ± 0.11–2.86 ± 0.10 day^–1 and 0.62 ± 0.01–1.45 ± 0.02 day^–1, whereas MZP grazing rates ranged from 1.59 ± 0.11–2.92 ± 0.12 day^–1 to 1.48 ± 0.05–2.15 ± 0.33 day^–1 during the summer and winter seasons respectively. Experimental results showed that the phytoplankton growth rate was lower than the MZP grazing rate in both seasons, indicating constant grazing pressure on the prey community. Also, MZP was capable of grazing more than 100% of daily primary production and 46–95% of daily phytoplankton standing stock. The Southern Sector of the lagoon was under high grazing pressure due to low phytoplankton biomass and high MZP abundance during the study period. Grazing pressure was higher in the Central Sector and Outer Channel during the winter and in the Northern Sector (NS) during the summer. The observed results highlight MZP as a potential consumer for phytoplankton primary production. The positive correlation between phytoplankton growth rate and grazing rate (R = 0.820, <i>P</i> &lt; 0.05) represents MZP as a major control of phytoplankton growth in both summer and winter. The high growth rate of phytoplankton during the summer season was balanced by the MZP grazing. All the sectors exhibited seasonal variations in grazing pressure depending on phytoplankton abundance and salinity conditions. From our study, we can conclude the top-down control of phytoplankton biomass by MZP in the Chilika Lagoon due to the high grazing rate.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"627 - 642"},"PeriodicalIF":1.7,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074151","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":"Changes in the symbiotic dinoflagellate and GFP-like protein in heat stress tolerant Porites harrisoni versus heat stress sensitive Acropora downingi: a case study in the Persian Gulf","authors":"Shirin Kaveh,&nbsp;Pargol Ghavam Mostafavi,&nbsp;Seyed Ali Hosseini Tafreshi,&nbsp;Mohammadhassan Shahhosseiny","doi":"10.1007/s10452-025-10183-0","DOIUrl":"10.1007/s10452-025-10183-0","url":null,"abstract":"<div><p>Coral reefs are among the most productive and diverse biological ecosystems in the world, hosting more than a quarter of all marine species. The coral reefs in the Persian Gulf, a sea surrounded by arid lands with high air temperatures, intense light, and high salinity of water, along with a remarkably large annual cycle of sea surface temperatures (SST), persist under challenging environmental conditions. The present study explored the changes in the symbiotic dinoflagellate and GFP-like proteins in a heat stress tolerant submassive <i>Porites</i> corals versus heat stress sensitive tabular <i>Acropora</i> corals across seasonal and depth gradients in Kish Island in the Persian Gulf. The results revealed that the symbiosis types was constant in both species, depth, and sampling seasons. However, an explicit change was observed in the quantity of symbiotic algae and <i>Durusdinium trenchii</i> as a heat-tolerant symbiodiniaceae dominating both coral species. Likewise, the level of GFP-like Protein mRNA expression, especially in <i>P. harrisoni</i>, significantly varied across seasonal and depth gradients. The GFP-like Protein mRNA was upregulated during summer in both species and decreased in <i>P. harrisoni</i> inhabiting the deep reef. Overall, the findings suggest that simultaneous changes in the symbiotic dinoflagellate and GFP-like proteins may be the key factors underlying the resistance of scleractinian corals during warm episodes in the Persian Gulf as the world’s warmest sea.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"609 - 625"},"PeriodicalIF":1.7,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073689","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":"Identification of octopus species and genetic structure of Octopus insularis in the western Atlantic","authors":"Levita Irene Sánchez-López,&nbsp;Carmen Amelia Villegas-Sánchez,&nbsp;Jani Jarquín-González,&nbsp;Rigoberto Rosas-Luis,&nbsp;Tatiana S. Leite","doi":"10.1007/s10452-025-10181-2","DOIUrl":"10.1007/s10452-025-10181-2","url":null,"abstract":"<div><p>The identification of octopus species, particularly those in the genera <i>Octopus</i> and <i>Pinnoctopus</i>, has been challenging due to the species' morphological plasticity and the presence of cryptic species in the western Atlantic. The use of molecular tools like DNA barcoding is important for accurate taxonomic identification, especially in understudied regions like the Greater Caribbean. This study aimed to identify octopus species in the Mexican Caribbean and the southwestern Gulf of Mexico, and to evaluate the genetic structure of <i>Octopus insularis</i> using the mitochondrial COI gene. Here, the species <i>Octopus insularis</i> was recorded for the first time at Banco Chinchorro and Punta Herrero, Quintana Roo, Mexico. Similarly, both <i>O. insularis</i> and <i>Pinnoctopus furvus</i> were recorded for the first time in the Lobos-Tuxpan Reef System. Additionally, 93 new octopus DNA sequences were obtained for the study area. The genetic analysis revealed 31 haplotypes of <i>O. insularis</i>, with a haplotype diversity of 0.53, indicating moderate genetic diversity. Three genetically distinct populations were identified from Brazil to the Gulf of Mexico, with two populations in Brazil showing the highest pairwise Fst values, indicating significant genetic differentiation. Importantly, the study assessed the genetic structure of <i>O. insularis</i> in the Caribbean Sea and Gulf of Mexico for the first time, revealing that these sites form a population. This suggests that the octopus populations in the region, covering areas like Colombia, Panama, Mexican Caribbean (Quintana Roo), and the Gulf of Mexico (Veracruz Reef System and Lobos-Tuxpan Reef System), could be managed as a fishery stock, highlighting the need for a unified approach to the sustainable management of these fishery resources.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"577 - 595"},"PeriodicalIF":1.7,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073688","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":"Adapted to the dry: ostracod communities in agricultural landscapes of eastern Yunnan, China","authors":"Qianwei Wang,&nbsp;Dayou Zhai,&nbsp;Ancheng Peng,&nbsp;Olga Schmitz,&nbsp;Ping Jiang,&nbsp;Xiaolu Fang,&nbsp;Min Wang,&nbsp;Peter Frenzel","doi":"10.1007/s10452-025-10179-w","DOIUrl":"10.1007/s10452-025-10179-w","url":null,"abstract":"<div><p>Research on non-marine ostracods in Yunnan Province, especially in desiccated and irrigation environments, is limited, restricting our understanding of their survival strategies, adaptation mechanisms, and biogeographical patterns within this region. The present study investigates ostracods across 43 sites in eastern Yunnan, including desiccated rice fields, ditches, rivers, ponds, vegetable fields, karstic cave, spring, and stream. A total of 483 living ostracod individuals were collected from 15 out of the 43 sampling sites, encompassing eleven species predominantly from the Cyprididae family, accompanied by species from the Candonidae, Cyclocyprididae and Ilyocyprididae families. Our results of culturing experiments with dried muds indicated survival of dormant ostracods, as an important strategy of recolonizing non-permanent water bodies after dry phases. Thus, recolonization is realized through an ‘ostracod bank’, not only an egg bank. Significant differences in species composition were observed across regions, reflecting the dynamic responses of ostracods to agricultural practices and environment. Furthermore, documented elevational distributions of some species could be extended based on our study areas in an elevation of 887‒2064 m asl. The study also documents three species new to Yunnan, increasing the number of known recent non-marine ostracod species in this province to 33. The newly recorded species are <i>Stenocypris hirutai</i> Smith and Kamiya (Hydrobiologia 559: 331–355, 2006), <i>Stenocypris viridis</i> Okubo, 1990 and <i>Hemicypris ovata</i> Sars, 1903. These findings provide insights into ostracod ecology, biogeography, and aquatic ecology, revealing adaptive and resilient mechanisms of ostracods in temporary, eutrophic habitats.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"541 - 559"},"PeriodicalIF":1.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074139","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":"Tracking the occurrence and global expansion of the non-native mollusk Corbicula largillierti (Bivalvia, Cyrenidae) in aquatic ecosystems","authors":"João Hemerson de Sousa,&nbsp;Betsy Dantas de Medeiros,&nbsp;Bruno Renaly Souza Figueiredo,&nbsp;Maria João Feio,&nbsp;Daniele Jovem-Azevêdo","doi":"10.1007/s10452-025-10180-3","DOIUrl":"10.1007/s10452-025-10180-3","url":null,"abstract":"<div><p><i>Corbicula largillierti</i> is an invasive bivalve with significant socioeconomic and ecological impacts reported globally. However, a comprehensive review documenting its status, distribution, and expansion rate is lacking. This study aimed to investigate the global distribution and expansion of <i>C. largillierti</i> in aquatic ecosystems. A systematic literature review and field sampling were conducted in watersheds receiving water transfers from the São Francisco River Integration Project (PISF/Eastern Axis) in the semiarid region of Brazil. The findings showed 307 occurrence records for <i>C. largillierti</i> in 14 countries across four continents. However, its expansion rate varies between countries and continents, with the annual expansion rate being higher at local scales (12.54%) than at regional (5.39%) and global scales (1.38%). Its occurrence was particularly high in South America (n = 235), mainly in Brazil (n = 155) and Argentina (n = 75), where the number of records exceeds that reported worldwide. Additionally, we recorded the first occurrence of <i>C. largillierti</i> in the Pajeú River Watershed (n = 12), and the spread of this invasive mollusk in the Paraíba River Watershed (n = 75). These observations suggest that the PISF may have facilitated the introduction and dispersion of species in these watersheds. Taken together, our findings show that <i>C. largillierti</i> is an invasive species with continuous expansion worldwide, especially in South America. Our results emphasize the urgent need to enhance control and prevention measures in countries where the prevalence is higher, highlighting its potential negative impacts on local ecosystems.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"561 - 575"},"PeriodicalIF":1.7,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073828","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":"Homogenization and distinction of coral recruit communities between natural and artificial substrates at Koh Tao a decade after deployment","authors":"Coline Monchanin,&nbsp;Matthias Desmolles,&nbsp;Rahul Mehrotra","doi":"10.1007/s10452-025-10182-1","DOIUrl":"10.1007/s10452-025-10182-1","url":null,"abstract":"<div><p>Thousands of tonnes of artificial substrate have been deployed across the Gulf of Thailand in recent decades for the purpose of habitat creation and reef restoration. At the island of Koh Tao, these were mostly deployed between 2011 and 2017. Field surveys conducted in 2018–19 (an average of 44 months post deployment) at the island revealed considerable disparity in the community structures of scleractinian corals with recruit communities from artificial reefs and natural giant clam shells differing significantly from mature communities (reefs and pinnacles). Despite multiple biotic and abiotic variables being tested, no single explanation was found, and thus the findings were evaluated in the context of multiple hypotheses. In this study, we present findings from a repeated assessment of the same sites and substrates, carried out in 2023 (an average of 102 months post deployment), with significant differences in scleractinian recruit communities between survey periods, and again when compared with natural reefs and pinnacles. Based on a new dataset of 5442 coral recruits (clam shells and artificial reefs) and 2.46 km of reef and pinnacle transect data, we observed a significant increase in the heterogeneity of recruit communities on artificial reefs, with clear indications of convergence with mature reef communities. Meanwhile on natural substrates (reefs, pinnacles and shells), we observed proportionally little difference in communities between surveys (with some exceptions such as an increase in the proportion of <i>Platygyra</i> corals). Our findings support the assertion that small changes in depth may significantly influence the rate and direction of community change.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"597 - 608"},"PeriodicalIF":1.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073894","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":"Analysis of the spatial differentiation characteristics of fish community structures in different water body types in the upper reaches of the Taihu Lake Basin based on environmental DNA technology","authors":"Junjiang Liu,&nbsp;Xiangen Xu,&nbsp;Liwan Zhou,&nbsp;Zhining Chen,&nbsp;Lina Chen,&nbsp;Tao Song,&nbsp;Sheng Feng,&nbsp;Puqing Xu","doi":"10.1007/s10452-025-10178-x","DOIUrl":"10.1007/s10452-025-10178-x","url":null,"abstract":"<div><p>Fish are the key groups for maintaining the health and stability of aquatic ecosystems. However, due to limitations in existing fish survey techniques, there has been insufficient systematic research on fish resources and community structures in the context of Yangtze River fish conservation. Given this, taking the upstream area of the Taihu Lake Basin, a region with a developed freshwater fishery in China, as a case study, this research adopted environmental DNA (eDNA) technology to monitor the structural characteristics, diversity, and spatial distribution of fish communities in different water body types. The research findings showed that a total of 88 fish species were detected at 127 monitoring sites, with 79 species in rivers, 71 species in lakes, 73 species in reservoirs, and 57 species in streams. Among them, the fish composition in rivers and lakes presented homogenisation, with pollution-tolerant fish such as <i>Carassius auratus</i>, <i>Cyprinus carpio</i>, and <i>Aristichthys nobilis</i> being the dominant species. Although the fish communities in some reservoirs and streams also showed a slight trend of homogenisation, more fish species with higher water quality requirements, like the <i>Rhinogobius giurinus</i> and <i>Odontobutis potamophila</i> were retained. In areas with a high degree of human aggregation, namely the Yangtze River-the Grand Canal (CY), the Tao Lake-Ge Lake area (TG), and the area flowing into Lake Taihu (RT), the fish communities were dominated by tolerant fish species. In the Maoshan-Tianmu Mountain area (MT), where human activities were sparsely dispersed, the fish communities were relatively richer in clear-water fish species. TN, EC, pH, WT, and the natural shoreline retention rate (NSR) were the key environmental influencing factors for the composition of fish communities in the study area. The fish communities in rivers and lakes were more significantly affected by water environmental quality factors such as TN, EC, pH, and WT, while the fish communities in reservoirs and streams were more influenced by the aquatic habitat factor NSR. There was a significantly positive correlation between NSR and the fish diversity in rivers and lakes, and a significantly negative correlation between NSR and that in reservoirs and streams. This study has completed the inventory of fish species resources in the upper reaches of the Taihu Lake Basin, laid a scientific foundation for the restoration and protection of fish resources in the Taihu Lake Basin, and contributed to the sustainable protection and restoration of the aquatic ecosystem in the Taihu Lake Basin.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"523 - 539"},"PeriodicalIF":1.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073745","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":"Phytoplankton assemblage dynamics in relation to environmental conditions in a riverine lake","authors":"Robert M. Burdis,&nbsp;Nicole K. Ward,&nbsp;John T. Manier","doi":"10.1007/s10452-025-10174-1","DOIUrl":"10.1007/s10452-025-10174-1","url":null,"abstract":"<div><p>Understanding drivers of phytoplankton assemblage structure is essential given the ecological, aesthetic, and health consequences that vary among taxonomic groups. In this study, we examined phytoplankton assemblage structure over a three-year period in a natural riverine lake in the Upper Mississippi River. Phytoplankton samples along with a suite of limnological variables were collected along a longitudinal gradient of the lake to investigate potential relationships, mechanisms, and drivers between environmental conditions and phytoplankton assemblage structure. We found over 100 phytoplankton taxa and assemblage structure varied between years, months, and sites. With the use of a distance-based linear model, 32.6% of the total variation in phytoplankton assemblages was explained by a combination of chemical, hydrological, and physical variables. Additionally, we noted a one-year absence of the common diatom, <i>Stephanodiscus hantzschii</i>, that may have been related to an unusual spring of warm water temperature and low soluble reactive phosphorus concentrations, indicating possible nutrient limitation in a large river system. Insights into the relationships between environmental conditions and individual and co-occurring species of phytoplankton should aid in developing a greater predictability of assemblages and may enable large river scientists and managers to better anticipate and address water quality conditions under changing climate and hydrologic regimes.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"467 - 485"},"PeriodicalIF":1.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10452-025-10174-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073717","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":"High nutrient availability does not mitigate submersion stress in an emergent aquatic macrophyte","authors":"Karina Fidanza,&nbsp;Raytha de Assis Murillo,&nbsp;Márcio José Silveira,&nbsp;Endrel de Azevedo Godoi,&nbsp;Sidinei Magela Thomaz","doi":"10.1007/s10452-025-10170-5","DOIUrl":"10.1007/s10452-025-10170-5","url":null,"abstract":"<div><p>In floodplains, the depth of water can directly impact the development of aquatic macrophytes. In this study, we used the emergent macrophyte <i>Polygonum ferrugineum</i> Wedd to investigate whether increased nutrient availability in the sediment alleviates submergence stress caused by flood conditions. Using a factorial design, we planted seedlings in two types of sediment (unenriched and enriched with P and N), subjecting them to deep and shallow water treatments. The effects of these treatments on plant attributes were assessed using a two-way ANOVA. The interaction between nutrients and depth significantly influenced most measured attributes (total biomass, shoot length, shoot biomass, leaf area, and root biomass). The highest values for these variables were observed when plants were grown in shallow water with high nutrient concentrations in the sediment. Root length and root:shoot ratios were influenced solely by depth, both of which were greater in the shallow treatment compared to the deep treatment. Our findings demonstrate that the growth of <i>P. ferrugineum</i> only occurs in shallow water where shoots are exposed to the atmosphere. Furthermore, our data indicate that greater depths (&gt; 0.7 m) negatively impact growth regardless of nutrient availability. Therefore, we reject the hypothesis that high nutrient availability mitigates submersion stress. Our results contribute to the discussion on the impact of floods on emergent macrophyte species, highlighting the rapid morphological changes observed due to nutrient conditions in flooded sediments.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"59 2","pages":"407 - 417"},"PeriodicalIF":1.7,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073681","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}