European journal of protistology最新文献_第4页

Phylogeny, morphology, and ultrastructure of sessilid peritrich ciliates in termite guts, Termitophrya africana and Doliophrys denislynni gen. nov., sp. nov. 非洲白蚁和白蚁肠道中无丝纤维纤毛虫的系统发育、形态和超微结构。

IF 1.9 2区生物学

European journal of protistology Pub Date : 2025-06-01 Epub Date: 2025-03-07 DOI: 10.1016/j.ejop.2025.126140

Renate Radek , Janneke Hassler , Katja Platt , Hisar Ahmad , Thomas Fromm , Michaela Strüder-Kypke , David Sillam-Dussès , Jiří Synek , Jan Šobotník , Vincent Hervé , Andreas Brune

{"title":"Phylogeny, morphology, and ultrastructure of sessilid peritrich ciliates in termite guts, Termitophrya africana and Doliophrys denislynni gen. nov., sp. nov.","authors":"Renate Radek , Janneke Hassler , Katja Platt , Hisar Ahmad , Thomas Fromm , Michaela Strüder-Kypke , David Sillam-Dussès , Jiří Synek , Jan Šobotník , Vincent Hervé , Andreas Brune","doi":"10.1016/j.ejop.2025.126140","DOIUrl":"10.1016/j.ejop.2025.126140","url":null,"abstract":"<div><div>Sessilids (Oligohymenophorea, Peritrichia, Sessilida) reportedly colonize the gut of certain “higher termites” (family Termitidae), but only a single species, Termitophrya africana from Jugositermes tuberculatus (subfamily Apicotermitinae), has been described based on a drawing. Similar ciliates were observed in other Apicotermitinae but remained unspecified. Our SSU rRNA gene-based survey of peritrich ciliates in a broad range of Termitidae recovered distinct phylotypes from several Apicotermitinae (Astalotermes, Jugositermes, and Phoxotermes), albeit only from samples collected in Cameroon and not from all species of these genera. They form a monophyletic group in the family Epistylididae (Sessilida), with Orborhabdostyla bromelicola as the closest relative. Light, scanning, and transmission electron microscopy of the sessilid ciliates in J. tuberculatus revealed two morphotypes, which were assigned to their corresponding phylotypes by sequence analysis of capillary-picked single cells. One morphotype, which is highly contractile and broadens continuously towards the posterior end, matches the description of Termitophrya africana. The cells are attached by a posterior scopula with short cilia and are often covered with rod-shaped ectobionts. The other morphotype has a stockier, barrel-shaped body and a short, clearly demarcated anterior end and is always free of ectobionts. We designate it as Doliophrys denislynni gen. nov., sp. nov.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"99 ","pages":"Article 126140"},"PeriodicalIF":1.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new freshwater monothalamid (Rhizaria, Foraminifera) from the Pyrenees branching within a marine clade 来自比利牛斯山的一种新的淡水单壳虫（根状纲，有孔虫目），在海洋分支中分支

IF 1.9 2区生物学

European journal of protistology Pub Date : 2025-06-01 Epub Date: 2025-05-28 DOI: 10.1016/j.ejop.2025.126156

Maria Holzmann , Ferry Siemensma

引用次数: 0

Testate amoebae are informative bioindicators of critically high ammonia deposition on peatlands 遗存变形虫是泥炭地高氨沉降的重要生物指标

IF 1.9 2区生物学

European journal of protistology Pub Date : 2025-06-01 Epub Date: 2025-03-29 DOI: 10.1016/j.ejop.2025.126147

Callum R.C. Evans , David A. Hatton , Graeme T. Swindles

{"title":"Testate amoebae are informative bioindicators of critically high ammonia deposition on peatlands","authors":"Callum R.C. Evans , David A. Hatton , Graeme T. Swindles","doi":"10.1016/j.ejop.2025.126147","DOIUrl":"10.1016/j.ejop.2025.126147","url":null,"abstract":"<div><div>The global nitrogen cycle has been majorly disrupted by anthropogenic activity. While nitrogen emissions in the UK and Ireland are declining, ammonia (NH3) remains a significant exception. NH3 emissions are mostly agriculturally sourced and deposited on nearby habitats at high rates in both countries. Peatlands are globally important wetlands that are vulnerable to NH3 deposition. Essential peatland restoration risks being diminished by excessive NH3 deposition, leading to the loss of valuable ecosystem services. This study investigates testate amoebae (indicators of contemporary and historic peatland conditions) as bioindicators of seasonal NH3 deposition on six peatlands across Northern Ireland, UK. Sphagnum, an NH3-sensitive bryophyte, was sampled adjacent to NH3 monitoring sites once per season for a year. When NH3 deposition was critically high, multivariate analysis demonstrates a link between NH3 and testate amoebae assemblage change. Similarly, at high NH3 deposition sites, testate amoebae taxa diversity is observed to be significantly reduced in springtime, when it is expected to be highest. Although, in response to high NH3 deposition large algivorous taxa do not proliferate as was anticipated, and mixotrophic taxa abundance decreases could not be linked primarily to NH3. This research demonstrates the continued potential of testate amoebae as highly informative peatland bioindicators.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"99 ","pages":"Article 126147"},"PeriodicalIF":1.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phagocytes of the forest: Are myxomycetes defensive mutualists for host plants? 森林吞噬细胞：黏菌是寄主植物的防御性互惠主义者吗？

IF 1.9 2区生物学

European journal of protistology Pub Date : 2025-06-01 Epub Date: 2025-06-06 DOI: 10.1016/j.ejop.2025.126158

Diana Wrigley de Basanta, Carlos Lado

引用次数: 0

The athecate dinoflagellate genus Karlodinium (Kareniaceae: Dinophyceae) from Mexican coastal waters, with three new records for the eastern Pacific Ocean 墨西哥沿海的甲藻鞭毛属甲藻属（甲藻科：甲藻科），在东太平洋有三个新记录

IF 1.9 2区生物学

European journal of protistology Pub Date : 2025-06-01 Epub Date: 2025-04-15 DOI: 10.1016/j.ejop.2025.126150

Jovanny Arana-Garcia , Alexis Escarcega-Bata , David U. Hernández-Becerril , María Eugenia Zamudio-Resendiz

{"title":"The athecate dinoflagellate genus Karlodinium (Kareniaceae: Dinophyceae) from Mexican coastal waters, with three new records for the eastern Pacific Ocean","authors":"Jovanny Arana-Garcia , Alexis Escarcega-Bata , David U. Hernández-Becerril , María Eugenia Zamudio-Resendiz","doi":"10.1016/j.ejop.2025.126150","DOIUrl":"10.1016/j.ejop.2025.126150","url":null,"abstract":"<div><div>The athecate dinoflagellate genus Karlodinium (family Kareniaceae) has a relatively high diversity and is known for its potential ichthyotoxicity in coastal marine environments. In this study, we report the occurrence of four species of Karlodinium in the Mexican Pacific: K. azanzae, K. cf. elegans, K. decipiens, and K. zhouanum. Three species (K. azanzae, K. decipiens, and K. zhouanum) were isolated from Acapulco Bay in March 2023, and one species (K. cf. elegans) was detected in fixed samples collected from the western coasts of Baja California in September 2020. The cell morphology was studied mainly by light microscopy and only K. cf. elegans was examined by scanning electron microscopy. Relevant morphological characters of all studied species were consistent with previous descriptions, and their morphological identification was confirmed by phylogenetic analysis of large subunit (LSU) rDNA sequences. The synonymy of K. jejuense and K. zhouanum was proposed based on a combination of morphological and molecular data.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"99 ","pages":"Article 126150"},"PeriodicalIF":1.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143895024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Epiphytic and fimicolous myxomycetes on the island Hiddensee (Germany): rare species, new genotypes and unexpected ecological preferences 德国Hiddensee岛上的附生和丝状黏菌：稀有物种，新基因型和意想不到的生态偏好

IF 1.9 2区生物学

European journal of protistology Pub Date : 2025-06-01 Epub Date: 2025-05-11 DOI: 10.1016/j.ejop.2025.126153

Anastasia Kochergina, Martin Schnittler

{"title":"Epiphytic and fimicolous myxomycetes on the island Hiddensee (Germany): rare species, new genotypes and unexpected ecological preferences","authors":"Anastasia Kochergina, Martin Schnittler","doi":"10.1016/j.ejop.2025.126153","DOIUrl":"10.1016/j.ejop.2025.126153","url":null,"abstract":"<div><div>Hiddensee, a small island in the Baltic Sea, is characterized by a rather dry, windy, and sunny climate, resembling a periodic desert. We studied epiphytic and fimicolous myxomycetes on the island using the moist chamber method for 101 substrate samples. A total of 37 myxomycete species were identified from 124 records, including 4 species newly recorded in Germany. Molecular barcoding revealed that 67 % of the obtained DNA sequences were new, differing by more than 1 % from their closest matches in the GenBank database. We obtained the first molecular data for Didymium megalosporum (found to be related to the aethaloid species D. spongiosum and D. yulii) and C. elegans var. microspora (new data for both the species and the variety). For Trichia rapa, described in 2023 based on a single barcoded collection, we found three different ribotypes, including one already known. Presumably undescribed taxa within the morphospecies Comatricha nigra, Didymium squamulosum, Enerthenema papillatum, and Trichia contorta were identified by molecular barcoding. Substrate preferences of myxomycetes, categorized into four substrate types (bark of living trees, leaf litter, twigs, and dung), showed distinct patterns of occurrence, with each substrate type associated with a characteristic assemblage of myxomycetes. The species composition on the bark of living trees showed a well-known dependence on bark pH and hardness, with differing pH optima and tolerance ranges among the studied species. Echinostelium minutum occurred across a broad pH spectrum (6.1–8.0; 11 records), whereas Didymium leptotrichum was restricted to a narrow pH range (7.9–8.1; 7 records). Trichia munda preferred relatively acidic substrates (6.4–7.2; 9 records), while Perichaena luteola (7.4–8.0, 5 records) was more commonly found in slightly alkaline conditions.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"99 ","pages":"Article 126153"},"PeriodicalIF":1.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A remarkable new monothalamid (Rhizaria, Foraminifera) from the shoreline of Livingston Island, Antarctica 南极洲利文斯顿岛海岸线上发现的一种非凡的新单thalamid （Rhizaria, Foraminifera）

IF 1.9 2区生物学

European journal of protistology Pub Date : 2025-06-01 Epub Date: 2025-03-29 DOI: 10.1016/j.ejop.2025.126148

Marcel Dominik Solbach , Ferry Siemensma , Maria Holzmann

引用次数: 0

Composition of cercozoan diversity: Unravelling leaf, root, and soil specificity in crop plants 尾虫多样性的组成：揭示作物植物的叶、根和土壤特异性

IF 1.9 2区生物学

European journal of protistology Pub Date : 2025-06-01 Epub Date: 2025-05-10 DOI: 10.1016/j.ejop.2025.126152

Julia Sacharow, Stefan Ratering, Santiago Quiroga, Rita Geissler-Plaum, Bellinda Schneider, Alessandra Österreicher Cunha-Dupont, Sylvia Schnell

{"title":"Composition of cercozoan diversity: Unravelling leaf, root, and soil specificity in crop plants","authors":"Julia Sacharow, Stefan Ratering, Santiago Quiroga, Rita Geissler-Plaum, Bellinda Schneider, Alessandra Österreicher Cunha-Dupont, Sylvia Schnell","doi":"10.1016/j.ejop.2025.126152","DOIUrl":"10.1016/j.ejop.2025.126152","url":null,"abstract":"<div><div>Protists are integral components of the plant holobiome, influencing plant growth and pathogenic pressure through their predatory activities. Wheat (Triticum aestivum), one of the most important crops globally, depends on favorable environmental conditions and effective pathogen management to achieve high yields. This study investigates the natural compositions of cercozoan diversity in winter wheat across various developmental stages (before sowing, at flowering, at ripening, and after harvesting) and plant compartments (leaves, roots, rhizosphere, and bulk soil) over two field seasons. The results revealed a pronounced dominance of the families Sandonidae, Allapsidae, Cercomonadidae, and Rhogostomidae across all samples. A strong enrichment of Sandonidae in leaf samples and Allapsidae in root samples was particularly notable. Importantly, no significant differences in cercozoan composition were observed across the different developmental stages of the plant. A comparative analysis between Triticum aestivum and Hordeum vulgare (barley) showed substantial similarity in cercozoan diversity across soil, leaf, and root compartments, with the only notable difference occurring in leaf samples during the ripening stage. The study concludes that cercozoan diversity in winter wheat is compartment-specific and remain stable across developmental stages. Further research is needed to explore cercozoan communities in greater taxonomic depth and to elucidate their ecological roles. Future studies should also assess whether similar patterns of compartmental variation and developmental consistency are observed in other major agricultural crops.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"99 ","pages":"Article 126152"},"PeriodicalIF":1.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144262808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the diversity of Brachonella: Morphological and molecular analysis with the discovery of a new species, Brachonella tenuicauda nov. spec. (Ciliophora, Armophorea, Metopida) 探索 Brachonella 的多样性：通过形态学和分子分析发现新物种 Brachonella tenuicauda nov.(纤毛虫纲，腕足动物，甲壳纲）

IF 1.9 2区生物学

European journal of protistology Pub Date : 2025-06-01 Epub Date: 2025-03-17 DOI: 10.1016/j.ejop.2025.126142

Nanda Dwi Kristanti, Quoc Dung Nguyen, Mann Kyoon Shin

{"title":"Exploring the diversity of Brachonella: Morphological and molecular analysis with the discovery of a new species, Brachonella tenuicauda nov. spec. (Ciliophora, Armophorea, Metopida)","authors":"Nanda Dwi Kristanti, Quoc Dung Nguyen, Mann Kyoon Shin","doi":"10.1016/j.ejop.2025.126142","DOIUrl":"10.1016/j.ejop.2025.126142","url":null,"abstract":"<div><div>Recently, the interest in studying anaerobic ciliates, particularly armophorean ciliates of the family Metopidae, has increased. The genus Brachonella, a member of this family, currently comprises eight species. However, only four of them have been comprehensively described, with B. contorta, the type species of Brachonella, being the subject of extensive global distribution analyses. This study presents a comprehensive morphological and molecular phylogenetic analysis of B. tenuicauda nov. spec., B. elongata, and B. pulchra. Brachonella tenuicauda is characterized by a tail-like posterior body end and by clusters of two to four dikinetids in the preoral dome kineties. Brachonella elongata is identified by its slender, elongated body without posterior constriction, whereas B. pulchra shows a broadly ellipsoidal to nearly obovoid body. Korean populations of B. pulchra and B. tenuicauda exhibit a diplostichomonad paroral membrane, a feature not previously documented for this genus. Phylogenetic analysis of 18S rDNA sequences indicates non-monophyly of the family Metopidae. Conversely, the genus Brachonella is depicted as monophyletic with full support, confirming its molecular distinctness from other metopid genera.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"99 ","pages":"Article 126142"},"PeriodicalIF":1.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First contours of autecology of freshwater heterotrophic euglenoids – results of two-year research on 18 freshwater bodies 淡水异养拟绿藻技术的初步轮廓——对18个淡水水体为期两年的研究结果

IF 1.9 2区生物学

European journal of protistology Pub Date : 2025-06-01 Epub Date: 2025-04-11 DOI: 10.1016/j.ejop.2025.126149

Jaroslav Kubín , Josef Juráň

{"title":"First contours of autecology of freshwater heterotrophic euglenoids – results of two-year research on 18 freshwater bodies","authors":"Jaroslav Kubín , Josef Juráň","doi":"10.1016/j.ejop.2025.126149","DOIUrl":"10.1016/j.ejop.2025.126149","url":null,"abstract":"<div><div>This study brings the first information about the autecological traits of heterotrophic euglenoids at eighteen localities in South Bohemia (Czech Republic). A number of environmental and landscape parameters including water chemistry and diversity of algae as well as of heterotrophic protists were analyzed over two years in order to assess the effect of environmental parameters on heterotrophic euglenoids. The major diversity of osmotrophs was found in acidic wetlands (i.e., peat bogs), while the majority of phagotrophs were detected in polytrophic sites. This was also illustrated by the correlation of heterotrophic euglenoids with other groups of organisms and other biotic parameters related to the trophic level at the sampling sites. Apparently, habitats with well-developed macrovegetation harboured the highest alpha diversity of heterotrophic euglenoids. Noteworthy, most taxa were found during summer and fall. Additional ecological data on rarely reported taxa observed during this survey (Astasia lagenula var. maxima, Calycimonas quinquecarinata, Euglenopsis vacuolata, Heteronema proteus, Heteronema tremulum, Parmidium circulare) were provided as well.</div></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"99 ","pages":"Article 126149"},"PeriodicalIF":1.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0