Aquatic SciencesPub Date : 2024-07-11DOI: 10.1007/s00027-024-01100-y
Carolina Teixeira Puppin-Gonçalves, Diego Medeiros Bento, Gilmar Perbiche-Neves, Rodrigo Lopes Ferreira, Marconi Souza-Silva, Vanessa Becker, Juliana Déo Dias
{"title":"Exploring uncharted waters: insights into groundwater zooplankton of the Brazilian semiarid region","authors":"Carolina Teixeira Puppin-Gonçalves, Diego Medeiros Bento, Gilmar Perbiche-Neves, Rodrigo Lopes Ferreira, Marconi Souza-Silva, Vanessa Becker, Juliana Déo Dias","doi":"10.1007/s00027-024-01100-y","DOIUrl":"10.1007/s00027-024-01100-y","url":null,"abstract":"<div><p>The subterranean environments of the Caatinga drylands (Brazilian biome) host a diverse array of aquatic systems and diversity, comprising both lentic and lotic ecosystems. Species diversity in these environmnts has been overlooked and remains poorly understood, especially regarding zooplankton. We studied the species richness and composition of zooplankton living in groundwater of the Caatinga drylands and explored how they vary in relation to habitat type (lentic and lotic) by testing two hypotheses: (1) species richness, gamma diversity, and zooplankton density are higher in lentic environments and (2) zooplankton species composition differs between habitat types. We sampled 12 lentic and lotic groundwater environments quarterly for 2 years, and identified 100 species of zooplankton in groundwater environments, including testate amoebae (50 species), Rotifera (25 species), Copepoda (16 species), and Cladocera (9 species). Rotifer species richness and copepod density differed between lentic and lotic habitats, as did zooplankton composition. Additionally, each habitat was found to harbor distinct indicator species based on their ecology and morphological characteristics. These findings contribute to current understanding of groundwater biodiversity and ecology, providing support for freshwater and speleological management and conservation programs.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141585152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 SciencesPub Date : 2024-07-10DOI: 10.1007/s00027-024-01105-7
Alan Santiago Tarda, Mario Carlos Nazareno Saparrat, Rocío Soledad Pazos, Nora Gómez
{"title":"Effect of glyphosate on the sporulation of aquatic fungi: an in-vitro experience","authors":"Alan Santiago Tarda, Mario Carlos Nazareno Saparrat, Rocío Soledad Pazos, Nora Gómez","doi":"10.1007/s00027-024-01105-7","DOIUrl":"10.1007/s00027-024-01105-7","url":null,"abstract":"<div><p>Glyphosate, a herbicide widely used in agriculture, has adverse effects on aquatic ecosystems. This study aimed to assess the repercussions of in-vitro exposure to varying concentrations of glyphosate (1500, 3000, and 6000 μg l<sup>−1</sup>) on sporulation of fungi that colonize <i>Typha latifolia</i> (L.) leaves. Although the results were not significant, our bioassay revealed a trend of a 50% increase in fungal sporulation at lower glyphosate concentrations compared to the control, with an effect size of approximately 100%. Thirteen aquatic fungi taxa were identified, belonging to the phylum Ascomycota. <i>Amniculicola longissima</i> (<i>Anguillospora longissima</i>) was dominant among fungi associated with decaying leaves, exhibiting a tendency of decreased sporulation rate at higher glyphosate concentrations. Conversely, <i>Brachysporium</i> sp. demonstrated significantly higher spore abundance at the lowest herbicide level. Some fungal taxa, such as <i>Cordana</i> sp., exhibited an inhibition of sporulation rates in the presence of glyphosate. On the other hand, <i>Curvularia</i> sp. and <i>Sporidesmium</i> sp. were only found in treatments with glyphosate concentrations > 3000 ppm. These findings underscore the potential adverse effects of glyphosate on sporulation of some aquatic fungi, pivotal microorganisms that are considered key in the decomposition of organic matter in aquatic ecosystems and consequently in water self-purification processes. Hence, it is plausible that this herbicide alters the dynamics of decomposition, modifying the recycling of organic matter and thereby influencing the trophic networks of aquatic ecosystems. These results represent a preliminary investigation that establishes a baseline to understand the effect of glyphosate on aquatic fungi, a topic that has been poorly studied.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 SciencesPub Date : 2024-07-09DOI: 10.1007/s00027-024-01099-2
Mateus Camana, Jean Carlo Gonçalves Ortega, Gabriel Lourenço Brejão, Adriano Sanches Melo, Murilo Sversut Dias, Fernando Gertum Becker
{"title":"A global meta-analysis of the effects of land use on the diversity of stream fish and macroinvertebrates","authors":"Mateus Camana, Jean Carlo Gonçalves Ortega, Gabriel Lourenço Brejão, Adriano Sanches Melo, Murilo Sversut Dias, Fernando Gertum Becker","doi":"10.1007/s00027-024-01099-2","DOIUrl":"10.1007/s00027-024-01099-2","url":null,"abstract":"<div><p>Different catchment land uses affect stream communities through direct and indirect effects by changes in water flow, sediment input, channel physical structure, and productivity. Previous studies of land use effects show a wide variation in the size and direction of biodiversity responses with positive, negative, or even no effects of the loss of native vegetation in catchments. This variation can result from physiographic characteristics, such as the original type of native vegetation (grassland or forest), dominant land use (agricultural or urban), history of change in land use and land coverage (LULC), and climate, and/or from the specific design of each study, such as the range of the analyzed LULC gradient. We performed a meta-analysis of 62 studies using stream macroinvertebrates and fish to determine which of these factors influence the biodiversity responses to changes in LULC. Contrary to our expectation, most of the physiographic factors considered relevant in the literature did not influence the response of macroinvertebrates and fish to land use. We did find, however, that studies with greater ranges of changes in LULC show stronger and the most negative diversity responses for macroinvertebrates. This suggests that studies covering a small gradient in LULC may be unable to detect potentially minute negative impacts on macroinvertebrate diversity. Our results highlight that the response of stream fish and macroinvertebrate diversity to changes in the landscape is context dependent. We suggest that the local environment of study sites and other context-dependent factors should be further investigated to better understand environmental contingencies in stream biodiversity responses.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 SciencesPub Date : 2024-07-09DOI: 10.1007/s00027-024-01096-5
Alena Yakhnenko, Yurij Bukin, Igor Khanaev, Valeria Itskovich
{"title":"Genetic diversity studies of Baikal endemic sponges at the interspecies and population levels using high-resolution microsatellite markers","authors":"Alena Yakhnenko, Yurij Bukin, Igor Khanaev, Valeria Itskovich","doi":"10.1007/s00027-024-01096-5","DOIUrl":"10.1007/s00027-024-01096-5","url":null,"abstract":"<div><p>Lake Baikal, an ancient, massive lake in Siberia that holds 20% of the world’s fresh water reserves, is a unique center of speciation. Changes in the lake’s ecosystem in recent years require comprehensive monitoring activities to track the continuously evolving situation. Sponges are bioindicators of the state of aquatic ecosystems, and in Lake Baikal sponges are represented by both cosmopolitan and endemic species. However, the study of intra- and interspecific relationships between endemic sponges is complicated by the fact that standard molecular genetic markers are not suitable for these purposes. In this regard, the search for suitable high-resolution molecular genetic markers is especially relevant. Here we report on the development of a set of universal microsatellite markers that allows the interspecific relationships between Lake Baikal endemic sponges to be studied. We tested the effectiveness of this set of microsatellite markers on representatives of four endemic sponge species and achieved a reliable separation of representatives of all four genera of the endemic sponge family Lubomirskiidae. This is the first report of a set of highly variable molecular genetic markers that has been developed specifically for the study of interspecific relationships between Lake Baikal sponges. This set also has the potential to be a marker for species identification, which is important for monitoring activities in connection with events of mass death and diseases of sponges in Lake Baikal. The described approach can be used to study endemic sponges from other ancient lakes. It has great potential for use in the development of universal markers for identifying groups of closely related species.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 SciencesPub Date : 2024-07-09DOI: 10.1007/s00027-024-01103-9
Björn Illing, Jennifer Sehl, Stefan Reiser
{"title":"Turbidity effects on prey consumption and survival of larval European smelt (Osmerus eperlanus)","authors":"Björn Illing, Jennifer Sehl, Stefan Reiser","doi":"10.1007/s00027-024-01103-9","DOIUrl":"10.1007/s00027-024-01103-9","url":null,"abstract":"<div><p>The anadromous European smelt (<i>Osmerus eperlanus</i>) plays a key role in food webs of many riverine ecosystems in Europe. However, population sizes in several German rivers (e.g. Elbe or Weser rivers) have diminished drastically over the past decade. Turbidity has been considered one of the stressors affecting the successful recruitment of European smelt, as their early life stages may be particularly sensitive to changes in the abiotic environment. In this study, we investigated whether prey consumption and survival of European smelt larvae would be negatively affected by an acute exposure to elevated turbidity. We reared the larvae in the laboratory and exposed them in four separate trials (18 to 26 days post hatch, 9.5 ± 0.8 mm standard length, mean ± SD) to six turbidity levels (0–500 NTU, nephelometric turbidity units). We found that prey uptake increased at low turbidity levels and decreased at high turbidity levels, with an optimum between 100 and 200 NTU. Survival started to decrease at turbidity levels above 300 NTU. In addition, we conducted a systematic literature analysis in which we found that prey consumption of larval and juvenile fishes had been tested across a wide range of turbidity levels, mostly using pelagic (e.g. planktonic) prey items, with more studies focusing on perciform fishes and juvenile rather than larval life stages. Our empirical findings contribute to establishing thresholds for optimal larval European smelt performance under increased turbidity and provide valuable information for developing mechanistic models that assess potential consequences for European smelt recruitment dynamics.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00027-024-01103-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 SciencesPub Date : 2024-07-06DOI: 10.1007/s00027-024-01097-4
T. A. Johnston, P. A. Cott, H. K. Swanson, A. D. Ehrman, G. L. Lescord, A. W. Sumner, P.-L. Savage, K. A. Patterson, R. W.-K. Tang, M. J. Heerschap, J. J. Montgomery, J. M. Gunn
{"title":"Ontogenetic variation in isotopic niche positions of aquatic consumers in boreal lakes","authors":"T. A. Johnston, P. A. Cott, H. K. Swanson, A. D. Ehrman, G. L. Lescord, A. W. Sumner, P.-L. Savage, K. A. Patterson, R. W.-K. Tang, M. J. Heerschap, J. J. Montgomery, J. M. Gunn","doi":"10.1007/s00027-024-01097-4","DOIUrl":"10.1007/s00027-024-01097-4","url":null,"abstract":"<div><p>We used an extensive multispecies dataset to examine how C and N stable isotope ratios (δ<sup>13</sup>C and δ<sup>15</sup>N) of aquatic consumers varied with body size in populations of northern lakes. Ontogenetic variation in tissue δ<sup>13</sup>C and δ<sup>15</sup>N was evident in a diversity of aquatic consumers. Relationships with body size tended to be stronger and more consistently positive for δ<sup>15</sup>N, and more variable in nature for δ<sup>13</sup>C. Among-population variation in ontogenetic slopes was greater for δ<sup>13</sup>C than for δ<sup>15</sup>N for most biota examined. Relationships between δ<sup>13</sup>C and δ<sup>15</sup>N and body size were still significant even after accounting for variation owing to tissue C:N and body condition. Ontogenetic variation was more strongly linked to age than body size in some fishes, particularly for δ<sup>15</sup>N, but age effects, inferred from growth rate, also accounted for variation in δ<sup>13</sup>C and δ<sup>15</sup>N beyond body size effects; δ<sup>13</sup>C tended to be positively related and δ<sup>15</sup>N tended to be negatively related to growth rate. There was only limited evidence of concordance in ontogenetic slopes between co-habiting pairs of species, suggesting that the factors driving ontogenetic variation in stable isotope ratios may be largely species- or population-specific. However, ontogenetic slopes of individual taxa were related to various lake habitat features representing climate, ecosystem size, and water clarity. The proportion of isotopic niche space attributable to ontogenetic variation can be substantial and this has implications for applying and interpreting isotopic niche metrics. Our study provides the broadest and most comprehensive analysis of ontogenetic variation in isotopic compositions of freshwater consumers to date and our results underscore the need to account for this variation in the analysis of freshwater food webs.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Unveiling the spatio-temporal variation of harmful algal bloom (HAB) species assemblages and their relationship with environmental factors in a tidal creek environment","authors":"Abhilash Wodeyar K, Sahina Akter, Suman Nama, Binaya Bhusan Nayak, Pranab Gogoi, Geetanjali Deshmukhe, Ashok Kumar Jaiswar, Asha Taterao Landge, Porayil Layana","doi":"10.1007/s00027-024-01093-8","DOIUrl":"10.1007/s00027-024-01093-8","url":null,"abstract":"<div><p>The present study provides complementary information on the harmful algal bloom (HAB) species present in Manori Creek coastal water and tidal channel. A total of 67 HAB species representing 35 genera and 7 taxonomic class groups were identified. Among them, 27 were potentially toxic, while 45 had the potential to form harmful algal blooms. Notable blooms included <i>Chaetoceros socialis</i> in April (8.9 × 10<sup>5</sup> cells l<sup>−1</sup>) and May (3.9 × 10<sup>5</sup> cells l<sup>−1</sup>), <i>Nitzschia palea</i> in May (4.37 × 10<sup>6</sup> cells l<sup>−1</sup>) and June (1.1 × 10<sup>5</sup> cells l<sup>−1</sup>), and <i>Coscinodiscus radiatus</i> in (2.7 × 10<sup>5</sup> cells l<sup>−1</sup>) in January. The marine ciliate <i>Mesodinium rubrum</i> exhibited bloom formation in May (1.33 × 10<sup>5</sup> cells l<sup>−1</sup>) at all stations in Manori Creek. Canonical correspondence analysis revealed that the proliferation of HAB species was facilitated by optimal temperature, salinity, and nutrient levels in creek water. Dinoflagellates responsible for paralytic shellfish poisoning (PSP) and diarrhetic shellfish poisoning (DSP) were rare and found in low abundance. Toxin assessment results, based on the mouse bioassay, revealed that <i>Gafrarium divaricatum</i> samples contained paralytic shellfish toxin (PSP toxin) levels < 0.875 mouse units (MU) per 100 g of clam tissue. The test mice exhibited normal fecal consistency, indicating the absence of high levels of diarrhetic shellfish toxin (DSP toxin). The present study recorded HAB species variability and potential toxin accumulation within <i>G. divaricatum</i> in Manori Creek. The data generated from the creek serve as a pivotal base for the advance monitoring initiatives focused on HAB species and their associated toxins within the creek ecosystem.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 SciencesPub Date : 2024-07-06DOI: 10.1007/s00027-024-01098-3
Shanshan Liao, Xiaodong Nie, Wenfei Liao, Yi Liu, Aoqi Zeng, Zhongwu Li
{"title":"Contribution and control of microbial necromass carbon in wetland soils","authors":"Shanshan Liao, Xiaodong Nie, Wenfei Liao, Yi Liu, Aoqi Zeng, Zhongwu Li","doi":"10.1007/s00027-024-01098-3","DOIUrl":"10.1007/s00027-024-01098-3","url":null,"abstract":"<div><p>Microbial necromass carbon (MNC) has been identified as an essential component of a persistent soil carbon pool. However, the contribution of MNC to soil organic carbon (SOC) in wetlands remains unclear. This study aims to explore the contribution of MNC to SOC and the factors controlling its distribution in wetlands. The distribution pattern of MNC in drawdown areas was investigated in the inlet and center of the Dongting Wetland, China. Random forest modeling was performed to determine the relative importance of environmental variables to MNC. A partial least squares path model was performed to further explore the direct and indirect effects of environmental variables on MNC. The analyses showed that the MNC content was 2652.70–3314.64 mg kg<sup>−1</sup>, accounting for 23.16–31.65% of SOC in wetland soils. Compared to bacterial necromass carbon (BNC), fungal necromass carbon (FNC) contributed more to SOC accumulation (over 70% of total MNC) in wetland soils. MNC content and the contribution of BNC to MNC increased with soil depth. In addition, MNC in wetland soils was directly affected by dissolved total nitrogen (DTN) and dissolved organic carbon (DOC)/SOC (<i>p</i> < 0.001; standardized total effect = 0.81). The pH indirectly affected MNC by regulating carbon and nitrogen content, with a standardized total effect of 0.48. In wetland soils, the lower MNC content and lower contribution to SOC may be supported by the slow accumulation of necromass and potential necromass mining in nutrient-poor conditions. Carbon and nitrogen availability played a crucial role in controlling the MNC turnover process in wetland soils.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 SciencesPub Date : 2024-07-01DOI: 10.1007/s00027-024-01095-6
Stefanie von Fumetti, Angelika Aberhalden
{"title":"Monitoring potential impacts of climate change on the biodiversity of springs and springbrooks in the Central Alps","authors":"Stefanie von Fumetti, Angelika Aberhalden","doi":"10.1007/s00027-024-01095-6","DOIUrl":"10.1007/s00027-024-01095-6","url":null,"abstract":"<div><p>Headwaters in alpine regions and their biodiversity are particularly threatened by climatic changes. Most predictions on their response to climate change are based on modeling approaches. Empirically gained data rarely exist for glacially influenced and groundwater-fed headwaters. In 2019, long-term monitoring was initiated at 15 springs, 8 springbrooks and 2 brooks in the UNESCO Biosphere Reserve Engiadina Val Müstair. The goal was to gain data on hydro-ecological aspects over several decades to understand whether (1) the environmental conditions change over time and (2) how these changes influence the composition of the species assemblages. Water temperature loggers were installed, pH, electrical conductivity, oxygen, nutrients and discharge were measured three times per year, and ecomorphological features were mapped two times per year. The meio- and macrofauna was sampled in 2019, 2020 and 2021 with a semi-quantitative approach. The results of the first 5 years of monitoring show that the physico-chemistry, water temperature and discharge confirm the stable character typical for groundwater-fed systems. Certain seasonal variability is evident, which possibly indicates an influence of permafrost or snow meltwater. The composition of the species assemblages differs significantly between sites but stays relatively constant over time within a site. Elevation and the availability of wood—parameters indicating forestation—significantly influence the species composition. This study provides a solid baseline on the environmental conditions and the fauna in springs and springbrooks in the Central Alps, which is needed for a proper interpretation of changes identified on a long-term basis.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00027-024-01095-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 SciencesPub Date : 2024-07-01DOI: 10.1007/s00027-024-01094-7
Dayou Zhai, Qianwei Wang, Changfei Jin
{"title":"Dormant and active ostracod communities in six rice fields of Yunnan, China","authors":"Dayou Zhai, Qianwei Wang, Changfei Jin","doi":"10.1007/s00027-024-01094-7","DOIUrl":"10.1007/s00027-024-01094-7","url":null,"abstract":"<div><p>Ostracods have frequently been reported as part of the active faunas in the wet phase of rice fields, but knowledge on the dormant ostracods during the dry period of the rice cycle has been limited, hindering a comprehensive understanding of their adaptation to the rice field environment. In this study, we record 11 dormant ostracod species by incubating soil samples from six desiccated rice fields in Yunnan Province of southwestern China. The dormant ostracod community was dominated by species of the family Cyprididae, accompanied by members of Candonidae, Ilyocyprididae, and Notodromadidae. Our data provide unequivocal evidence for the presence of dormant ostracods from all the four families of the superfamily Cypridoidea in desiccated rice fields, verifying that these ostracods adapt to the rice fields by desiccation-resistant stage. Considering the usually shallow penetration depth of ostracods, the frequent discoveries of dormant ostracods in 2‒4 cm depth in the soil profile were probably the result of ploughing. Despite overlap in species composition, the dormant ostracod community differs from the active community sampled at the same sites more than four years ago. This suggests temporal changes of faunal composition, although the ecological memory of the dormant community containing multiple generations and the different seasonal windows represented by the two types of communities should also be considered. The emergence of adults within the first two weeks of the incubation experiment suggests the presence of dormant instars in the soil rather than resting eggs alone.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141531958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}