Acta Protozoologica最新文献_第5页

Morphology of Three Aloricate Choreotrich ciliates, Including Description of a New Species Parastrombidinopsis costalis sp. n. (Ciliophora, Choreotrichia), and phylogeny of the genus Parastrombidinopsis 三种alorate choreotricia纤毛虫的形态，包括一新种Parastrombidinopsis costalis sp. n.(纤毛虫，choreotricia)的描述和Parastrombidinopsis属的系统发育

IF 0.5 4区生物学

Acta Protozoologica Pub Date : 2019-01-11 DOI: 10.4467/16890027AP.18.013.10089

Wen Song, Jia-Mei Li, Yao-Moan Huang, K. Al-Rasheid, Weiwei Liu, Xiaozhong Hu, M. Miao

引用次数: 8

Growth Rate Modulation Enables Coexistence in a Competitive Exclusion Scenario Between Microbial Eukaryotes 生长速率调节使微生物真核生物在竞争排斥情景中共存

IF 0.5 4区生物学

Acta Protozoologica Pub Date : 2019-01-01 DOI: 10.4467/16890027ap.19.019.12021

Giulia M. Ribeiro, P. Prado, R. Coutinho, Marina C. Rillo, S. P. Junior, A. L. Porfírio-Sousa, D. Lahr

{"title":"Growth Rate Modulation Enables Coexistence in a Competitive Exclusion Scenario Between Microbial Eukaryotes","authors":"Giulia M. Ribeiro, P. Prado, R. Coutinho, Marina C. Rillo, S. P. Junior, A. L. Porfírio-Sousa, D. Lahr","doi":"10.4467/16890027ap.19.019.12021","DOIUrl":"https://doi.org/10.4467/16890027ap.19.019.12021","url":null,"abstract":"Coexistence usually are exceeding the explicable rate by competitive exclusion principle. Since the pioneer Gause, many studies have used protist microcosm systems to study competitive exclusion. We explored a two-species system with the testate-amoebae: (Arcella intermedia and Pyxidicula operculata), where competitive exclusion is expected to occur. We determined their growth curves individually and under competitive interaction. We used a state-space model to represent system dynamics and calculated posterior population sizes simulating competition dynamics. Contrarily to our expectation, Arcella and Pyxidicula showed similar growth rates (1.37 and 1.46 days–1 respectively) and only different carrying capacity (1,997 and 25,108 cells cm–2 respectively). The maximum number of cells of both species when growing in competition was much lower if compared to the monospecific cultures (in average, 73% and 80% less for Arcella and Pyxidicula respectively). However, our competition experiments always resulted in coexistence. According to the models, the drop in growth rates and stochasticity mainly explains our coexistence results. We propose that a context of ephemeral resources can explain these results. Additionally, we propose generating factors of stochasticity as intraspecific variation, small population effects, toxicity of waste products and influence of the bacterial community.","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70978023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Morphology and morphogenesis of a Chinese population of a soil urostylid ciliate, Extraholosticha sylvatica (Foissner, 1982) Li et al., 2017 (Ciliophora, Hypotrichia) 中国一种土壤尿柱体毛虫，Extraholosticha sylvatica种群的形态与形态发生(Foissner, 1982)

IF 0.5 4区生物学

Acta Protozoologica Pub Date : 2019-01-01 DOI: 10.4467/16890027ap.19.017.12019

Jingbao Li, Keqing Wen, Erkang Zhu, Jingyi Wang

{"title":"Morphology and morphogenesis of a Chinese population of a soil urostylid ciliate, Extraholosticha sylvatica (Foissner, 1982) Li et al., 2017 (Ciliophora, Hypotrichia)","authors":"Jingbao Li, Keqing Wen, Erkang Zhu, Jingyi Wang","doi":"10.4467/16890027ap.19.017.12019","DOIUrl":"https://doi.org/10.4467/16890027ap.19.017.12019","url":null,"abstract":"A soil urostylid ciliate Extraholosticha sylvatica, isolated from southern China, is studied using live observation and protargol impregnation. The main ontogenetic features of E. sylvatica are as follows: (a) in the proter, only the posterior part of the parental adoral zone of membranelles is renewed, while the anterior portion is retained; undulating membranes anlage undergo, like most hypotrichs, depolymerization of old undulating membranes and differentiation of new structures; (b) the oral primordium in the opisthe and the frontoventraltransverse cirral anlagen in both daughter cells are formed with contribution of the parental midventral cirri; (c) three frontal, one buccal, three to five frontoventral, one or two frontoterminal, two or three pretransverse ventral and six to 11 transverse cirri and 16–22 midventral pairs are generated from frontoventral-transverse cirral anlagen; (d) in both the left and the right marginal rows as well as the dorsal kineties, each two anlagen are formed intrakinetally; three to six caudal cirri are formed at the posterior end of the 5th dorsal kinety anlage; (e) the macronuclear nodules fuse into a single mass during the process.","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70978465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae) pantanalensis Hemiholostica nov.spec.的形态和个体发生

IF 0.5 4区生物学

Acta Protozoologica Pub Date : 2019-01-01 DOI: 10.4467/16890027ap.19.010.11419

P. Vďačný, W. Foissner

{"title":"Morphology and Ontogenesis of Hemiholosticha pantanalensis nov. spec. (Ciliophora, Hypotrichia, Psilotrichidae)","authors":"P. Vďačný, W. Foissner","doi":"10.4467/16890027ap.19.010.11419","DOIUrl":"https://doi.org/10.4467/16890027ap.19.010.11419","url":null,"abstract":"The morphology and ontogenesis of a new psilotrichid ciliate, Hemiholosticha pantanalensis, were studied using live observation, protargol impregnation, and scanning electron microscopy. Diagnostic features of the new species include: a medium-sized, almost circular to broadly obovate body with a short anterior projection; two macronuclear nodules with a single micronucleus in between; a total of about 35 cirri arranged in three ventral, one postoral, one right and one left marginal row; three dorsal kineties extending along prominent ribs; an adoral zone occupying about 60% of body length; and intracellular, eyespot-bearing, green algae almost filling the body. The ontogenesis of H. pantanalensis follows the psilotrichid mode, being a mixture of features found not only in various hypotrich taxa but also in other spirotrich groups. Specifically, the oral primordium develops in a deep pouch as in euplotids and oligotrichs, the anlage for the undulating membranes does not produce cirri as in euplotids and some schmidingerothrichids, and the longitudinal ventral cirral row R3 develops from two anlagen as in some amphisiellids and kahliellids. Since psilotrichids are classified in a polytomy of main hypotrich lineages in 18S rRNA gene phylogenies, some of their ontogenetic features might be ancient spirotrich plesiomorphies while others might be homoplasies. Address for correspondence: Peter Vďačný, Department of Zoology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842 15 Bratislava, Slovak Republic; E-mail: peter. vdacny@uniba.sk","PeriodicalId":50883,"journal":{"name":"Acta Protozoologica","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70977992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

A New Trichodina Species (Peritrichia: Mobilida) from Anuran Tadpole Hosts, Sclerophrys spp. in the Okavango Panhandle, Botswana, with Comments on this Taxon 博茨瓦纳Okavango Panhandle Anuran Tadpole Hosts, Sclerophrys spp.一种新的毛癣菌属(peritricia: Mobilida)及其分类群的注释

IF 0.5 4区生物学

Acta Protozoologica Pub Date : 2019-01-01 DOI: 10.4467/16890027ap.19.014.11915

Gerhard Jager, L. Basson, Jacqueline van Marwijk

引用次数: 2

Small Free-Living Heterotrophic Flagellates from Marine Intertidal Sediments of the Sydney Region, Australia 澳大利亚悉尼地区海洋潮间带沉积物中的小型自由生活异养鞭毛虫

IF 0.5 4区生物学

Acta Protozoologica Pub Date : 2019-01-01 DOI: 10.4467/16890027ap.19.016.12018

W. Lee

引用次数: 1

New discoveries of the genus Thuricola Kent, 1881 (Ciliophora, Peritrichia, Vaginicolidae), with descriptions of three poorly known species from China 金龟子属的新发现，1881年（Ciliophora，Peritricia，Vaginicolidae），以及中国三个鲜为人知的物种的描述