Aquatic EcologyPub Date : 2024-06-07DOI: 10.1007/s10452-024-10118-1
Daphine Ramiro Herrera, Rogerio Caetano da Costa
{"title":"Reproductive traits, relative growth and maturity of blue crabs Callinectes danae and Callinectes ornatus in South Atlantic waters","authors":"Daphine Ramiro Herrera, Rogerio Caetano da Costa","doi":"10.1007/s10452-024-10118-1","DOIUrl":"10.1007/s10452-024-10118-1","url":null,"abstract":"<div><p>The reproductive strategies of species play a fundamental role in formulating effective management plans and maintaining local community structure and ecological balance. This study investigated the reproductive characteristics of two sympatric species, <i>Callinectes danae</i> and <i>Callinectes ornatus</i>, in Atlantic waters. Monthly sampling was conducted from July/12 to June/14 in the coastal (sites: S1, S2, S3 and S4) and estuarine-lagoon (sites: S5, S6 and S7) areas of Cananéia-Iguape, Brazil. Significant differences in allometric coefficients were observed, particularly in the relationships chelipod length vs. carapace width (CW) for males and abdominal width vs. carapace width (CW) for females. Morphological sexual maturity was estimated at 58.8 mm CW for <i>C. danae</i> males, 54.5 mm CW for females, 45.0 mm CW for <i>C. ornatus</i> males, and 41.2 mm CW for females. Gonadal sexual maturity sizes were identified at 69.4 mm CW for <i>C. danae</i> males, 61.4 mm CW for females, and 58.4 mm CW for <i>C. ornatus</i> males, 46.9 mm CW for females. Both species spawn predominantly during the austral summer, with higher prevalence in site S5 for <i>C. danae</i> and S1 for <i>C. ornatus</i>. Recruitment occurred in austral spring and summer, with <i>C. danae</i> concentrated in estuarine-lagoon regions and <i>C. ornatus</i> along the coast. Reproductive patterns of <i>C. danae</i> were associated with temperature and salinity, while <i>C. ornatus</i> exhibited correlations with temperature and organic matter. This study highlights the influence of environmental factors on species' life cycles. Furthermore, it contributes to the evaluation of management and monitoring strategies, recognizing the economic and ecological significance of these species for sustaining these ecosystems.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"58 3","pages":"963 - 982"},"PeriodicalIF":1.7,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141371573","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}
Aquatic EcologyPub Date : 2024-06-05DOI: 10.1007/s10452-024-10119-0
Anh Ngoc Thi Do, Tuyet Anh Thi Do, Hau Duc Tran
{"title":"Distribution of fish larvae and juveniles on salinity in an estuary predicted from remote sensing and fuzzy logic approach","authors":"Anh Ngoc Thi Do, Tuyet Anh Thi Do, Hau Duc Tran","doi":"10.1007/s10452-024-10119-0","DOIUrl":"10.1007/s10452-024-10119-0","url":null,"abstract":"<div><p>Salinity is one of the main factors influencing the early life stages of fish along an estuary, which shows great temporal and spatial changes. Recently, remote sensing has been widely applied to map salinity changes and fuzzy logic is identified as a suitable and strong tool for modeling complex systems. Based on collections of fish larvae and juveniles and water parameters in May, September, November, and December during 2019 along the Ba Lat estuary of the Red River, northern Vietnam, the present study attempts to predict the mapping and monitoring of the salinity using multispectral satellite imagery from Landsat 8 OLI satellite. The study determined that the NFS machine learning model, when improved by PCA, achieved a higher performance in displaying different salinity levels. The present study also confirms that using high spatial resolution or hyperspectral images would have increased the accuracy of spatial variation in similar modeling and mapping. Fuzzy rule–based modelling suggests that the occurrence of fish larvae and juveniles depended on salinity levels, with an R<sup>2</sup> > 0.9, compared to the field surveys. This finding further confirms the accuracy data obtained by artificial neural network models.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"58 3","pages":"983 - 998"},"PeriodicalIF":1.7,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255197","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}
Aquatic EcologyPub Date : 2024-05-24DOI: 10.1007/s10452-024-10111-8
Anh Ngoc Thi Do, Tuyet Anh Thi Do, Long Van Pham, Hau Duc Tran
{"title":"Assessment of the role of mangroves for Periophthalmus modestus applying machine learning and remote sensing: a case study in a large estuary from Vietnam","authors":"Anh Ngoc Thi Do, Tuyet Anh Thi Do, Long Van Pham, Hau Duc Tran","doi":"10.1007/s10452-024-10111-8","DOIUrl":"10.1007/s10452-024-10111-8","url":null,"abstract":"<div><p>Early stages of fish are easily sensitive to any alteration of environments, thus understanding their dispersions in a dynamic system like estuaries are important in protection and conservation of fish diversity and fishery resources. Especially, it is more significant for a mangrove-associated mudskipper, <i>Periophthalmus modestus</i>, which are distributed in mudflats along the Northwest Pacific, and now are listed as near threatened due to climate change and human activities. In the present study, a hybrid model, Extreme gradient boosting (XGBoost)-Artificial neural networks (ANN), was applied to forecast the distribution of <i>P. modestus</i> larvae and juveniles collected from a large estuary in northern Vietnam, which are driven by temperature and mangrove changes. Present results demonstrate the usefulness and applicability of ANN-XGBoost model in ecological studies, with an excellent estimation accuracy. Furthermore, employing Generative adversarial networks (GANs) model, this study exhibits a decrease in mangrove areas due to human activities between 2010 and 2023. This change with a rise in temperatre during this period would have impacted on <i>P. modestus</i> larvae and juveniles, which tend to be distributed in mangroves and avoid human-affected areas. Thus, it is concluded that changes in <i>P. modestus</i>’ environment like mangroves have a significant influence on their distribution and survival. Applying a novel model in ecological research, this work further indicates the importance of mangrove forests for aquatic organisms, especially mudskippers. This research will allow scientists and biological managers to make more precise forecasts regarding the spread of <i>P. modestus</i>, while also helping to the protection of this mudskipper and other species. Protecting and developing mangrove forests are the first and crucial action to supply a suitable habitat for any fish species. The models employed in this work will be helpful for other relevant studies when obtaining a highly accurate performance.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"58 3","pages":"879 - 893"},"PeriodicalIF":1.7,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141099819","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}
Aquatic EcologyPub Date : 2024-05-20DOI: 10.1007/s10452-024-10109-2
Mehrshad Taheri, Maryam Yazdani Foshtomi, Mohammad Ali Hamzeh, Ahmad Manbohi, Reza Rahnama Haratbar
{"title":"Effects of discarded garbage bags on intertidal free living nematode community","authors":"Mehrshad Taheri, Maryam Yazdani Foshtomi, Mohammad Ali Hamzeh, Ahmad Manbohi, Reza Rahnama Haratbar","doi":"10.1007/s10452-024-10109-2","DOIUrl":"10.1007/s10452-024-10109-2","url":null,"abstract":"<div><p>Single-use plastic litter is the main component of marine litter worldwide. In the present study, the impact of discarded single-use garbage bags is experimentally evaluated on density, diversity, community structure and vertical distribution of the upper intertidal free living nematode community. Our results showed that the presence of garbage bags on intertidal sediment sharply decreased total and vertical nematode densities and diversity indices as well as decreased sediment oxygen redox potential, and altered total and vertical nematode communities. However, covering sediment with garbage bags did not result in complete nematode mortality. At the end of the experiment, epigrowth feeders and facultative predator nematodes disappeared and the community was dominated by deposit feeder genera. Considering that single-use plastic litter is in intertidal ecosystems, any change in the density and biomass of benthic fauna could lead to a decrease in benthic secondary production and food shortage for their predators.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"58 3","pages":"853 - 863"},"PeriodicalIF":1.7,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141121821","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}
Aquatic EcologyPub Date : 2024-05-17DOI: 10.1007/s10452-024-10108-3
O. T. Akinpelu, F. O. Arimoro, A. V. Ayanwale, V. I. Chukwuemeka, T. A. Oladeji, E. O. Akindele
{"title":"Habitat characteristics and anthropogenic activities influence the distribution of macroinvertebrate traits and ecological preferences in Nigerian streams: a case study of Osun State, Nigeria","authors":"O. T. Akinpelu, F. O. Arimoro, A. V. Ayanwale, V. I. Chukwuemeka, T. A. Oladeji, E. O. Akindele","doi":"10.1007/s10452-024-10108-3","DOIUrl":"10.1007/s10452-024-10108-3","url":null,"abstract":"<div><p>Impact of habitat characteristics and anthropogenic activities on the distribution of macroinvertebrate traits and ecological preferences was assessed in Osun State, Nigerian. Physicochemical parameters involving water depth (WD), channel width (CW), flow rate, discharge, water temperature (W.T), dissolved oxygen (DO), total dissolved solids (TDS), electrical conductivity (EC), pH, biological oxygen demand (BOD), turbidity, nitrate, phosphate and organic matter (OM), were appraised, alongside macroinvertebrates from 5 streams in different geographical locations. Sampling spanned from December 2019 to October 2021, covering early and late dry seasons, as well as early and late rainy seasons. Principal component analysis classified the sites into three impact categories: least impacted (LIS), moderately impacted (MIS), and highly impacted (HIS). Nine traits and ecological preferences displayed significant variations alongside nine physicochemical variables, such as phosphate, OM, WD, discharge, CW, TDS, EC, W.T, and nitrate, within the Fourth-corner figure. Furthermore, these traits and ecological preferences exhibited notable correlations with site impact categories, including–no turbidity preference, spherical body shape, climbers to LIS, preference for transparent water, crawlers, climbers, burrowers, small body size to MIS, and highly tolerant to ocxygen depletion to MIS.This study underscores the effectiveness of macroinvertebrate trait-based approach as a freshwater biomonitoring tool in Osun State, Nigeria, providing essential insights into how environmental factors influence macroinvertebrate traits in lotic systems in the region, with implications not only locally but also for broader eclogical studies.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"58 3","pages":"833 - 852"},"PeriodicalIF":1.7,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140965739","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}
Aquatic EcologyPub Date : 2024-05-16DOI: 10.1007/s10452-024-10107-4
Sunardi Sunardi, Moh. Dede, Sandy Budi Wibowo, Yudo Prasetyo, Annisa Joviani Astari, Lukman Lukman, Franck Lavigne, Christopher Gomez, Idea Wening Nurani, Yuichi Sakai, Mohd Khairul Amri Kamarudin
{"title":"Preliminary assessment of river ecosystem services in the volcanic area of Mount Merapi, Indonesia","authors":"Sunardi Sunardi, Moh. Dede, Sandy Budi Wibowo, Yudo Prasetyo, Annisa Joviani Astari, Lukman Lukman, Franck Lavigne, Christopher Gomez, Idea Wening Nurani, Yuichi Sakai, Mohd Khairul Amri Kamarudin","doi":"10.1007/s10452-024-10107-4","DOIUrl":"10.1007/s10452-024-10107-4","url":null,"abstract":"<div><p>River ecosystem services (RES) are vulnerable to landscape changes mainly by volcanic eruptions. Therefore, this study aims to assess RES in the volcanic area which was affected by the major and minor eruptions of Mount Merapi, Indonesia. The RES referred to the regulating and supporting services of the Krasak River in Jogjakarta. The research involved collecting water and biodiversity samples from two distinct Merapi’s hazard zones (KRB I and KRB II) along the river. Parameters related to regulating services, such as particulate, organic, and nutrient purification, biological control, as well as supporting services like primary productivity, were quantified. We conducted an analysis to understand how landscape conditions interacted with these parameters and employed the <i>t</i>-test to assess differences in RES between the two KRBs. Our findings revealed that the Krasak River exhibited a range of values, including 2.40–5.95 mg/l for Biological Oxygen Demand (BOD), 0.61–3.41 mg/l for nitrate, 0.02–0.11 mg/l for phosphate, 160–60,000 MPN/100 ml for coliform, and 156.3–937 µg/l for chlorophyll-A. These values demonstrated the river’s capacity to perform both regulation and support services. However, certain segments showed variations in ecosystem services, possibly due to the presence of autochthonous matter from aquatic organisms and decomposing organic matters. This showed that volcanic eruption and landscape are closely linked with the water quality and aquatic biodiversity, which affect the ecosystem services.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"58 3","pages":"819 - 832"},"PeriodicalIF":1.7,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10452-024-10107-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140968355","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}
Aquatic EcologyPub Date : 2024-05-16DOI: 10.1007/s10452-024-10106-5
Dhoni Bushi, Gibji Nimasow
{"title":"Seasonal variation of limnological parameters and phytoplankton dynamics in the high-altitude oligotrophic lakes of Tawang district, Arunachal Pradesh (India)","authors":"Dhoni Bushi, Gibji Nimasow","doi":"10.1007/s10452-024-10106-5","DOIUrl":"10.1007/s10452-024-10106-5","url":null,"abstract":"<div><p>Seasonal variations of limnological parameters and phytoplankton dynamics in high-altitude oligotrophic lakes form a critical area of interest in assessing the implications and impact of climate change on fragile ecosystems and formulating effective conservation strategies. Thus, a study was conducted by sampling water from five High-Altitude Lakes (HALs) of Tawang district, Arunachal Pradesh between December 2019 and December 2021. The seasonal variations of seven physico-chemical parameters and phytoplankton's composition, distribution, and seasonal abundance were assessed. Further, the diversity, dominance, and evenness of phytoplankton were estimated and the relationship between limnological parameters and the phytoplankton species was established using Canonical Correspondence Analysis (CCA). The limnological parameters such as pH, dissolved oxygen, free carbon dioxide (FCO<sub>2</sub>), alkalinity, hardness, conductivity, and total dissolved solids (TDS) show significant seasonal variations among the HALs. A total of 50 phytoplankton species belonging to 8 Class and 33 Family were recorded. The order of phytoplankton dominance was Bacillariophyceae > Cyanophyceae > Zygnematophyceae > Chlorophyceae > Chrysophyceae = Dinophyceae, Euglenophyceae = Klebsormidiophyceae. The most abundant species were <i>Cymbella</i> sp., <i>Gomphonema</i> sp., <i>Fragilaria</i> sp., <i>Navicula</i> sp., <i>Nitzchia</i> sp. (Bacillariophyceae), <i>Volvox</i> sp., <i>Pediastrum</i> sp., <i>Microspora</i> sp. (Chlorophyceae), <i>Oscillatoria</i> sp., <i>Lyngbya</i> sp., <i>Calothrix</i> sp., <i>Chroococcus</i> sp. (Cyanophyceae), <i>Spirogyra</i> sp., <i>Mougeotia scalaris</i>, <i>Cosmarium</i> sp., <i>Closterium</i> sp. (Zygnematophyceae). The abundance of phytoplankton species varied seasonally with most copious in winter. The distribution, abundance, and diversity of phytoplankton were largely influenced by pH, hardness, FCO<sub>2</sub>, conductivity, and TDS levels. So, the findings of the study could be helpful in exploring the potentialities of introducing cold-water fisheries in HALs to ensure food security under climate change scenarios.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"58 3","pages":"801 - 818"},"PeriodicalIF":1.7,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140970974","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}
Aquatic EcologyPub Date : 2024-05-13DOI: 10.1007/s10452-024-10110-9
Tatiana Lopatina, Natalia Oskina, Egor Zadereev
{"title":"Salinity sensitivity of Moina macrocopa post-diapause females hatched from resting eggs of different ages","authors":"Tatiana Lopatina, Natalia Oskina, Egor Zadereev","doi":"10.1007/s10452-024-10110-9","DOIUrl":"10.1007/s10452-024-10110-9","url":null,"abstract":"<div><p>Worldwide freshwater salinization may significantly alter ecosystem functioning and affect biodiversity. We studied the effect of salinity on hatching success of resting eggs of different ages and life history traits of post-diapause females of cladoceran <i>Moina macrocopa</i>. The hatching success of resting eggs was almost unaffected by the salinity we tested (up to 5.9 g L<sup>−1</sup>). We observed a distinct difference in the hatching success of resting eggs of different ages, which was lower by ca. 50% for 4-year-old resting eggs compared with 1-year-old resting eggs. We found a decrease in the values of the life-history traits of the females hatched from 4-year-old resting eggs compared with the females hatched from 1-year-old resting eggs exposed to salinity within the range of 0.08–3.5 g L<sup>−1</sup>: a shorter lifespan, a lower juvenile somatic growth rate, a delay in the day of the first reproduction, and a smaller number of parthenogenetic clutches produced. Analysis showed that at a salinity of 3.5 g L<sup>−1</sup>, females hatched from resting eggs are more vulnerable to the effect of salinity than directly developing females. The post-diapause females exposed to salinity showed a shorter lifespan and reduced reproduction parameters (produced fewer clutches and neonates) compared with the directly developing females. Thus, the hatching of resting eggs can be considered as a critical period of the development of a species with the diapause in its life cycle due to the vulnerability of post-diapause females to increased salinity, which can be crucially important for the ecological success of the population.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"58 3","pages":"865 - 877"},"PeriodicalIF":1.7,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941721","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":"Growth dynamics and lipid metabolism of Aurantiochytrium sp.: insights into its potential applications","authors":"Zahra Shafaghat, Farzaneh Najafi, Ramazan-Ali Khavari-Nejad, Mehdi Mohammadi, Sattar Tahmasebi Enferadi","doi":"10.1007/s10452-024-10105-6","DOIUrl":"10.1007/s10452-024-10105-6","url":null,"abstract":"<div><p><i>Aurantiochytrium</i> sp. is a marine microalga known for its bioactive compounds. This study assessed its presence in Iran and investigated its specific biochemical and molecular traits. Parameters such as biomass, protein content, hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) and malondialdehyde (MDA) levels, catalase enzyme (CAT) activity, and expression of malic enzyme (ME) and acetyl-CoA carboxylase (ACCase) genes were analyzed at different growth stages (24, 48, 72, and 96 h). Fatty acid composition, unsaturated fatty acids (UFA) and saturated fatty acids (SFA) contents, and the ratio of UFA to SFA were also examined. Molecular identification confirmed successful proliferation, with significant increases in biomass and protein content during growth. Elevated H<sub>2</sub>O<sub>2</sub> and MDA levels indicated oxidative stress, whereas enhanced CAT activity suggested its potential role in scavenging reactive oxygen species and mitigating oxidative damage. The upregulation of <i>ME</i> and <i>ACCase</i> genes during growth indicated their involvement in lipid biosynthesis. This was further supported by the analysis of fatty acid composition, which revealed a higher proportion of UFA than SFA. These findings underscore the importance of specific growth stages for optimizing cultivation conditions and maximizing bioactive compound production in <i>Aurantiochytrium</i> sp. Overall, this study provides valuable insights into the growth dynamics and lipid metabolism of <i>Aurantiochytrium</i> sp., contributing to our understanding of its potential applications.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"58 3","pages":"789 - 799"},"PeriodicalIF":1.7,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140935966","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}
Aquatic EcologyPub Date : 2024-05-06DOI: 10.1007/s10452-024-10099-1
Krešimir Žganec, C. Brannon Andersen, Jasna Lajtner
{"title":"The impact of salinization on benthic macro-crustacean assemblages in a Mediterranean shallow lake","authors":"Krešimir Žganec, C. Brannon Andersen, Jasna Lajtner","doi":"10.1007/s10452-024-10099-1","DOIUrl":"10.1007/s10452-024-10099-1","url":null,"abstract":"<div><p>The shallow Vrana Lake in Dalmatia, Croatia, is directly connected to the Adriatic Sea by the Prosika canal (0.85 km), constructed in the eighteenth century. The aim of this research was to examine the impacts of salinization on long-term changes in littoral macro-crustacean (Malacostraca) populations and assemblages in Vrana Lake and connecting canals. Benthic macroinvertebrates were sampled at seven sites during the period 2011–2020 (14 months) using a hand net (25 × 25 cm, 500 µm). During the study period, saltwater intrusions (strongest in 2012) through the Prosika Canal and site V4 caused increased salinization, resulting in a shift from normal oligohaline (0.5–5 PSU) to mesohaline (5–18 PSU) salinity. Out of a total of 18 macro-crustacean taxa identified, five widespread species—amphipods <i>Echinogammarus stocki</i> and <i>Gammarus aequicauda</i>, isopods <i>Lekanesphaera hookeri</i> and <i>Proasellus coxalis</i>, and decapod <i>Palaemon antennarius</i> constituted 91.6% of collected specimens (26,986). The first three brackish/marine species were significantly positively correlated with the average salinity 12 and 24 months before sampling. They disappeared or had very low abundance during the second low salinity phase (< 1–2 PSU), when freshwater/oligohaline <i>P. coxalis</i> and <i>P. antennarius</i> were the dominant macro-crustaceans. Two years of low salinity were needed for a strong population decline or disappearance of three brackish/marine species. Salinization is a major stressor in the Vrana Lake basin, and measures for its active control are urgently needed. The use of tested macro-crustacean metrics is recommended for future ecological monitoring as it could provide fast information about the effects of water management on aquatic biodiversity.</p></div>","PeriodicalId":8262,"journal":{"name":"Aquatic Ecology","volume":"58 3","pages":"689 - 706"},"PeriodicalIF":1.7,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140883849","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}