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    Wyświetlanie 1-21 z 21
    Tytuł:
    Three New Microthoracids (Ciliophora, Nassophorea) from Austria and Venezuela
    Autorzy:
    Omar, Atef
    Foissner, Wilhelm
    Powiązania:
    https://bibliotekanauki.pl/articles/763736.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    biodiversity, ciliates, Drepanomonas, Leptopharynx, new species, soil ciliates
    Opis:
    Using standard methods, we describe three new microthoracids. Drepanomonas minuta nov. spec. is characterized by a small size (in vivo about 22 × 11 µm) and a curious distribution pattern of the extrusomes, viz., only one trichocyst each in mid of dorsal margin and near posterior end of ventral side. Body size and shape of D. minuta highly resemble D. revoluta – for which a new morphometric characterization is provided – which, however, has a deep, broad furrow on the left side and more than 10 extrusomes. Drepanomonas multidentata nov. spec. was discovered in ephemeral grassland puddles on the north coast of Venezuela. It is a comparatively large species (in vivo 45 × 25 µm) with a total of nine spines, of which those on the left posterior half form a highly characteristic tridentate pattern. Curiously, this species lacks extrusomes. Leptopharynx lajacola nov. spec. was discovered in an ephemeral puddle on a granitic outcropping (Laja) in Venezuela. This species resembles L. costatus but is unique in having a quadrangular outline and a strongly curved oral basket with the opening directed posteriorly. In the past four years, we have described 10 new microthoracids, showing that their diversity is far from being exhausted.
    Źródło:
    Acta Protozoologica; 2014, 53, 4
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Onset of Ciliate Populations in Newborn Foals
    Autorzy:
    Egan, Catherine Elizabeth
    McEwan, Neil R.
    Snelling, Tim
    Powiązania:
    https://bibliotekanauki.pl/articles/763443.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Ciliates, equine digestive tract, colonisation
    Opis:
    The time of onset of survival of ciliate protozoa in the equine hindgut in new born foals was investigated. Daily faecal samples were collected from 6 new-born foals and studied under a microscope for examples of ciliates within the samples. The results of this study show that ciliates are first seen in faecal samples from the foal on day 5 post partum although these appeared to be voided and were assumed to be non-viable. However, by the following day the ciliates collected seen in the faecal samples appeared to be intact and were assumed to be viable. This observation is 5 days earlier than ciliates have previously been observed in faeces collected from the digestive tract of newborn foals.
    Źródło:
    Acta Protozoologica; 2010, 49, 2
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphological Studies on Five Trachelocercids from the Yellow Sea coast of China, with a Description of Tracheloraphis huangi spec. nov. (Ciliophora, Karyorelictea)
    Autorzy:
    Xu, Yuan
    Esaulov, Anton
    Lin, Xiaofeng
    Mazei, Yuri
    Hu, Xiaozhong
    Al-Rasheid, Khaled A. S.
    Warren, Alan
    Powiązania:
    https://bibliotekanauki.pl/articles/763700.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Infraciliature, Karyorelictea, marine ciliates, Trachelocerca, Tracheloraphis
    Opis:
    The morphology and infraciliature of five trachelocercid ciliates: Tracheloraphis huangi spec. nov., T. colubis (Kahl, 1933) comb. nov., T. phoenicopterus (Cohn, 1866) Dragesco, 1960, T. oligostriata (Raikov, 1962) Foissner and Dragesco, 1996 and Trachelocerca incaudata Kahl, 1933, isolated from the intertidal zone of a beach at Qingdao, China, were studied in live and protargol impregnated specimens. Tracheloraphis huangi spec. nov. was distinguished from its congeners mainly by its single nuclear group composed of 25–30 round macronuclei and 29–37 somatic kineties. The poorly known T. colubis is redescribed including for the first time information on its infraciliature. An improved diagnosis is also provided. In light of its infraciliature, T. colubis is transferred to Tracheloraphis from the genus Trachelocerca. Additional data on other three species is supplied based on the Qingdao populations.
    Źródło:
    Acta Protozoologica; 2011, 50, 3
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ecology of moss dwelling ciliates from King George Island, Antarctic: the effect of environmental parameters
    Autorzy:
    Mieczan, Tomasz
    Tarkowska-Kukuryk, Monika
    Powiązania:
    https://bibliotekanauki.pl/articles/2051134.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Antarctic
    King George Island
    ciliates
    biodiversity
    bryophytes
    Źródło:
    Polish Polar Research; 2014, 4; 609-625
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Taxonomic Studies on Three Marine Ciliates from China, Including a New Species (Ciliophora, Cyrtophorida)
    Autorzy:
    Pan, Hongbo
    Ma, Honggang
    Hu, Xiaozhong
    Al-Rasheid, Khaled A. S.
    Al-Farraj, Saleh A.
    Powiązania:
    https://bibliotekanauki.pl/articles/763525.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Cyrtophorida, infraciliature, marine ciliates, new species, taxonomy
    Opis:
    The present work investigates the living morphology and infraciliature of three marine cyrtophorid ciliates, which were isolated from Qingdao, China. Compared with its congeners, Orthotrochilia sinica spec. nov. can be distinguished by a combination of features: body slender and elliptical in outline, size about 50–60 × 20–25 μm in vivo, 18–21 somatic kineties, the length of the left perioral kinety treble the length of the right one, two ventrally located contractile vacuoles on the right side, and 25–32 nematodesmal rods. Based on current observations and the previous description, the diagnosis of Trochilioides tenuis (Deroux, 1976) Chen et al. 2011 is improved: cell size 30–40 × 20–35 μm in vivo, oval shaped in outline; consistently three right kineties, four left kineties and seven postoral kineties; a single contractile vacuole; marine habitat. A second species of Trochilioides, T. recta (Kahl, 1923) Chen et al. 2011 is re-described based on a Chinese population. Furthermore, a key to the identification of species of the genus Trochilioides whose infraciliature data are available is supplied, and Chlamydonyx trivialis (Fenchel, 1965) comb. nov. [basionym: Trochilioides trivialis Fenchel, 1965] is suggested.
    Źródło:
    Acta Protozoologica; 2013, 52, 1
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Redescriptions of two Marine Scuticociliates from China, with notes on Stomatogenesis in Parauronema longum (Ciliophora, Scuticociliatida)
    Autorzy:
    Pan, Xuming
    Shao, Chen
    Ma, Honggang
    Fan, Xinpeng
    Al-Rasheid, Khaled A. S.
    Al-Farraj, Saleh A.
    Hu, Xiaozhong
    Powiązania:
    https://bibliotekanauki.pl/articles/763650.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Scuticociliates, infraciliature, marine ciliates, morphogenesis, Parauronema, Pleuronema
    Opis:
    The morphology and infraciliature of two marine scuticociliates, Pleuronema puytoraci Grolière and Detcheva, 1974, and Parauronema longum Song, 1995, collected from China, were investigated using live observation and protargol impregnation methods. Based on the data obtained for the China population, new information of the living morphology of Pleuronema puytoraci is documented and details of the complete infraciliature is available for the first time. The stomatogenesis of Parauronema longum is basically similar to that of its congeners and can be summarized as follows: membranelle 1, membranelle 2 and the scutica of the opisthe originate from the parental paroral membrane, whereas membranelle 3 of the opisthe develops from the parental scutica; the paroral membrane originates from the parental paroral membrane.
    Źródło:
    Acta Protozoologica; 2011, 50, 4
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Planktonic Ciliates of the Neva Estuary (Baltic Sea): Community Structure and Spatial Distribution
    Autorzy:
    Mironova, Ekaterina
    Telesh, Irena
    Skarlato, Sergei
    Powiązania:
    https://bibliotekanauki.pl/articles/763523.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Ciliates, mixotrophs, plankton, Neva Estuary, Baltic Sea
    Opis:
    Ciliate communities in open waters of the meso-eutrophic Neva Estuary (the Baltic Sea) were studied in summer 2010. Abundance and biomass of ciliates were surprisingly low (0.03–1.9 ind ml–1 and 0.04–2.4 × 10–3 μg C ml–1), especially in samples with high detritus content. During this study we detected four ciliate species which are new for the Baltic Sea. Mixotrophic ciliates dominated at the majority of stations (28–67% of overall ciliate numbers). Their contribution was significantly higher in the outfall area and northern part of the Neva Estuary (Resort District), where total density of ciliates was low. Medium-sized ciliates (30–60 μm) were the most diverse and abundant (average contribution 59% of total abundance). The two parts of the estuary, separated from each other by a storm-surge barrier, differed slightly in their community structure (p < 0.05) but did not significantly differ in ciliate numbers and biomass values.
    Źródło:
    Acta Protozoologica; 2013, 52, 1
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular phylogeny of Spirodinium equi, Triadinium caudatum and Blepharocorys sp. From the equine hindgut
    Autorzy:
    Snelling, Tim
    Pinloche, Eric
    Worgan, Hilary J.
    Newbold, Jamie
    McEwan, Neil R.
    Powiązania:
    https://bibliotekanauki.pl/articles/763646.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Gut ciliates, Entodiniomorphida, horse hindgut, Protista, Vestibulifera
    Opis:
    Single cell morphotypes of the species Triadinium caudatum and Spirodinium equi, together with a representative of the genus Blepharocorys (Blepharocorys sp.) were used for phylogenetic analysis based on their 18S rRNA genes. Spirodinium equi clustered with sequences already described for the entodiniomorphs isolated from horses and the Blepharocorys sp. also grouped within the Entodiniomorphida clade, although both sequences were distinct from those described from rumen ciliates. Triadinium caudatum clustered within the Vestibuliferida, and most closely to that of Paraisotricha, only other member of this order which has been described in the horse. It was concluded that although members of the orders Entodiniomorphida and Vestibuliferida are present in the equine gut, and that they share an ancient linage with their rumen counterparts, they are ancestrally different groups.
    Źródło:
    Acta Protozoologica; 2011, 50, 4
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Enigmatic Hook of the Metaradiophryids (Alveolata, Ciliophora)
    Autorzy:
    Hausmann, Klaus
    Günther, Gerd
    Lehmann, Diana
    Radek, Renate
    Powiązania:
    https://bibliotekanauki.pl/articles/763507.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Astomatous ciliates, Metaradiophrya spec., hook structure, holdfast organelle
    Opis:
    The astomatous metaradiophryids are ciliates which live endosymbiotically in earthworms (Annelida, Lumbricidae). Their prominent hook apparatus is demonstrated in detail in light micrographs of living organisms as well as in scanning electron micrographs of Parducz-fixed cells. Since it was first observed, this structure has been interpreted as a ‘holdfast’ organelle preventing ciliates from being expelled prematurely from the intestine of the worm along with its excrements. No active movement of the hook has been reported in earlier papers or in our recent studies. Nevertheless, a detailed description of different parts of the hook apparatus exists in older literature, including a hypothesis on how these elements interact with each other to function as a holdfast device – without any experimental evidence. The suspected mode of function of this structure is questioned and critically discussed.
    Źródło:
    Acta Protozoologica; 2016, 55, 1
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High-Density Cultivation of the Marine Ciliate Uronema marinum (Ciliophora, Oligohymenophorea) in Axenic Medium
    Autorzy:
    ZHENG, Weibo
    Gao, Feng
    Warren, Alan
    Powiązania:
    https://bibliotekanauki.pl/articles/763770.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Axenic cultivation, ciliates, fish parasite, scuticociliatosis, Uronema marinum
    Opis:
    Uronema marinum is a cosmopolitan marine ciliate. It is a facultative parasite and the main causative agent of outbreaks of scuticociliatosis in aquaculture fish. This study reports a method for the axenic cultivation of U. marinum in high densities in an artificial medium comprising proteose peptone, glucose and yeast extract powder as its basic components. The absence of bacteria in the cultures was confirmed by fluorescence microscopy of DAPI-stained samples and the failure to recover bacterial SSU-rDNA using standard PCR methods. Using this axenic medium, a maximum cell density of 420,000 ciliate cells/ml was achieved, which is significantly higher than in cultures using living bacteria as food or in other axenic media reported previously. This method for high-density axenic cultivation of U. marinum should facilitate future research on this economically important facultative fish parasite.
    Źródło:
    Acta Protozoologica; 2015, 54, 4
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Taxonomic Revision and Neotypification of Zosterodasys transversus (Kahl, 1928), with Description of a Mirror-Image Doublet (Ciliophora, Phyllopharyngea, Synhymeniida)
    Autorzy:
    Vďačný, Peter
    Tirjaková, Eva
    Powiązania:
    https://bibliotekanauki.pl/articles/763603.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Freshwater ciliates, Ipeľ River, morphology, morphometry, Slovakia, synonymy
    Opis:
    The present work describes the morphology and morphometry of a freshwater ciliate, Zosterodasys transversus, using live observation and protargol impregnation. The population from the River Ipeľ, Slovakia is designated as a neotype because (i) no type material is available from the species described by Kahl (1928); (ii) the neotype is consistent with Z. transversus as described by Kahl (1928); (iii) the neotype is from the same biogeographic region as Kahl’s (1928) populations; and (iv) there are several similar species (e.g., Z. agamalievi) whose identity is threatened by the species to be neotypified. The main features of Z. transversus are: (i) a body size of 120–240 × 50–115 μm in vivo; (ii) a broadly to narrowly obovate or elliptical body; (iii) a spherical to very narrowly ellipsoidal macronucleus with a single globular micronucleus nearby; (iv) several scattered contractile vacuoles; (v) an average of 82 ciliary rows, most of which are interrupted by a synhymenium incompletely encircling the body; and (vi) an average of 14 nematodesmal rods strengthening walls of the cyrtos. In the well-growing neotype population, a single cell of a mirror-image type was found. Most of the structures of this monster specimen are similar to those from ordinary cells, except for the double cytostome and cyrtos.
    Źródło:
    Acta Protozoologica; 2012, 51, 1
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Description of Epistylis camprubii n. sp., a Species Highly Tolerant to Ammonium and Nitrite
    Autorzy:
    Canals, Oriol
    Salvadó, Humbert
    Powiązania:
    https://bibliotekanauki.pl/articles/763511.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Peritrichia, wastewater treatment, ciliates, 18s rRNA, ammonium, nitrite
    Opis:
    A new peritrich species highly tolerant to ammonium and nitrite, Epistylis camprubii n. sp., was found adhered to the biofilm of two advanced wastewater treatment plants treating high ammonium-loaded wastewater in Rubí, Spain. Its morphology, oral infraciliature and phylogenetic position in the peritrich clade were studied. The new species is a vase-shaped peritrich, constricted below the peristomial lip, with an in vivo average length of 58.7 ± 10.1 µm, average width of 32.0 ± 5.4 µm, and a longitudinally striated, compact stalk that occasionally exhibits uneven thickness and rarely shows transverse segments. The peristomial disc is commonly rounded or pointed, and rarely umbilicated. The C-shaped macronucleus is located in the adoral half of the body, and the only contractile vacuole lies in the adoral third of the zooid. The molecular analysis of the 18s gene sequence clustered E. camprubii n. sp. together with the other Epistylis, with the exception of Epistylis galea.
    Źródło:
    Acta Protozoologica; 2016, 55, 1
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Description of Leptopharynx bromeliophilus nov. spec. and Leptopharynx australiensis nov. spec. (Ciliophora, Nassulida)
    Autorzy:
    Omar, Atef
    Foissner, Wilhelm
    Powiązania:
    https://bibliotekanauki.pl/articles/763567.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Australia, α-taxonomy, bromeliad tanks, Jamaica, Leptopharynx costatus, soil ciliates.
    Opis:
    Using standard morphological methods, we describe two new Leptopharynx species, each discovered in a specific biogeographic region and habitat. Leptopharynx bromeliophilus nov. spec., a minute species (25 × 20 μm) discovered in tanks of bromeliads from Jamaica, is small-mouthed and has a slightly concave preoral region, an average of 27 basal bodies in kinety 4, and a total of 142 basal bodies on average. Leptopharynx australiensis nov. spec., a comparatively large species (40 × 25 μm) discovered in jungle soil of Australia, is large-mouthed and has a distinctly oblique preoral region, widely spaced kinetids in kinety 1, a total of 184 basal bodies on average, and the oral primordium is inside of a cortical fold thus appearing right of the posterior end of kinety 1. Four new features are recognized for distinguishing Leptopharynx species: (1) to have a monomorphic (producing either small- or large-mouthed cells) or polymorphic (producing microstomes and macrostomes) life cycle; (2) the spacing of the kinetids in kinety 1 as either ordinary or wide; (3) the shape (flat or concave) and angle (≤ 15° slightly oblique, ≥ 40° distinctly oblique) of the preoral region; and (4) the total number of basal bodies, which has proven statistically.
    Źródło:
    Acta Protozoologica; 2011, 50, 2
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology of Two Novel Species of Chaenea (Ciliophora, Litostomatea): Chaenea paucistriata spec. nov. and C. sinica spec. nov.
    Autorzy:
    Fan, Xinpeng
    Xu, Yuan
    GU, Fukang
    LI, Jiqiu
    Al-Farraj, Saleh A.
    Al-Rasheid, Khaled A. S.
    Hu, Xiaozhong
    Powiązania:
    https://bibliotekanauki.pl/articles/763652.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Chaenea, ciliary pattern, identification key, marine ciliates, new species, taxonomy
    Opis:
    During faunistic studies of ciliates in coastal waters of Daya Bay and Bohai Bay, China, two previously unknown ciliates were discovered and investigated using standard taxonomic methods. Morphological comparative analyses revealed that they represent two novel species in the genus Chaenea. Chaenea paucistriata spec. nov. can be distinguished from its congeners by the following traits: body length in vivo about 180–250 µm; eight somatic kineties; dorsal brush rows 1–4 consisting of three, five, seven, and two dikinetids, respectively; rod-like extrusomes, 8 µm long; 63–94 macronuclei; cortical granules minute and colourless. Chaenea sinica spec. nov. differs from its congeners in having: body length in vivo about 140–240 µm; 17–21 somatic kineties; dorsal brush rows 1–4 consisting of 3–7, 10 or 11, 11–13, and 3–6 dikinetids, respectively; rod-like extrusomes about 6–8 µm long; 71–164 macronuclei. A key is presented to assist the identification of all Chaenea species.
    Źródło:
    Acta Protozoologica; 2015, 54, 2
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Diversity of Scuticociliates (Protozoa, Ciliophora): A Report on Eight Marine Forms Found in Coastal Waters of China, with a Description of One New Species
    Autorzy:
    Fan, Xinpeng
    Lin, Xiaofeng
    Al-Rasheid, Khaled A. S.
    Al-Farraj, Saleh A.
    Warren, Alan
    Song, Weibo
    Powiązania:
    https://bibliotekanauki.pl/articles/763706.pdf
    Data publikacji:
    2011
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Infraciliature, marine ciliates, new combination, new species, Protocyclidium, Pseudoplatynematum, Scuticociliate
    Opis:
    Eight marine scuticociliates, Pseudoplatynematum denticulatum (Kahl, 1933) nov. comb., Protocyclidium sinica nov. spec., Histiobalantium marinum Kahl, 1933, Porpostoma notata Möbius, 1888, Philaster hiatti Thompson, 1969, Parauronema longum Song, 1995, Uronemella parafilificum Gong et al., 2007, and Paranophrys magna Borror, 1972, collected from Chinese coastal waters, were investigated using live observations and silver impregnation methods. Investigations of a Chinese population of Platynematum denticulatum (Kahl, 1933) reveal that it has a highly strengthened pellicle and distinct spines and thus corresponds well with the definition of Pseudoplatynematum Bock, 1952. A new combination, Pseudoplatynematum denticulatum (Kahl, 1933) nov. comb., is therefore proposed and an improved species diagnosis is supplied. Protocyclidium sinica nov. spec. is characterized by: small body size with buccal field approximately 60% of body length; extrusomes present; 13 or 14 somatic kineties; somatic kinety 1 comprising approximately 24 densely arranged kinetids; somatic kinety n shortened posteriorly; single macronucleus. Additional information is documented on the morphology of six other species of scuticociliates based on the China populations.
    Źródło:
    Acta Protozoologica; 2011, 50, 3
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Planktonic communities in a small post-peat reservoir (Ustka Forest District, Poland)
    Autorzy:
    Rychert, Krzysztof
    Wielgat-Rychert, Magdalena
    Matviikiv, Anna
    Kryvoshei, Yana
    Parfeniuk, Anastasiia
    Powiązania:
    https://bibliotekanauki.pl/articles/2040961.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    acidic waters
    Baltic raised mire
    phytoplankton
    ciliates
    rotifers
    Gonyostomum semen
    Opis:
    The aim of this study was to evaluate the present state of a small (area of 0.2 ha), shallow (mean depth of 2 m) and approximately 30-year-old post-peat reservoir located in Bruskowskie Bagno, a Baltic raised mire in northern Poland. The study was conducted during all seasons of the year (August 2019–July 2020). The reservoir was characterised by a yellow to brown water colour, low pH (5.4) and quite low conductivity (40.4 µS cm-1), which are the main features of dystrophic water bodies. Similar to natural, dystrophic lakes and ponds, the phytoplankton was mainly composed of mixotrophic species like Dinobryon sp. and Gonyostomum semen. The only numerous non-flagellate group within the phytoplankton was desmids, which indicated that the water was influenced by the mire. The reservoir was characterised by a high abundance of ciliates (annual mean of 55.6 cells ml-1) and a very high abundance of rotifers (annual mean of 3.72 ind. ml-1). Among ciliates, the most important were prostomatids, accounting for 53% of the mean annual ciliate abundance. The results of our study indicate that artificial, approximately 30-year-old, post-peat reservoir resembled a natural dystrophic water body.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2021, 63, 3; 260-266
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Horizontal Distribution of Psammonic Ciliates in Two Lakes of Different Trophic Status: Relationship to Physical and Chemical Parameters
    Horyzontalne rozmieszczenie orzęsków psammonowych w dwóch zróżnicowanych troficznie jeziorach: zależności z parametrami fizycznymi i chemicznymi
    Autorzy:
    Mieczan, T.
    Nawrot, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/204546.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bioróżnorodność
    różnorodność biologiczna
    jezioro
    orzęski psammonowe
    biodiversity
    lake
    ecotone
    psammon
    ciliates
    Opis:
    The aims of this study were to identify the taxonomic diversity and abundance of psammonic ciliate communities in mesotrophic and eutrophic lakes (Łęczna-Włodawa Lakeland, eastern Poland). The effect of selected physical and chemical water parameters on ciliates community was also analysed. Psammon samples were collected during three seasons: spring, summer and autumn of 2010. In each lake, in the psammolittoral, samples were collected in the euarenal, higroarenal, and hydroarenal zones. A total of 53 ciliate taxa were recorded. The highest value of the Shannon-Weaver index was recorded in summer in eutrophic lake (2.79). At the same time in mesotrophic lake, a lower value of the index was determined (0.79). The mean numbers of ciliates ranged from 516 ind.cm-3 in the eutrophic lake to 191 ind. cm-3 in the mesotrophic lake. In eutrophic lake, the highest number of ciliates was recorded in the euarenal (649 ind. cm-3), and the lowest in the higroarenal (425 ind. cm-3). In the mesotrophic lake, the highest average numbers were determined in the higroarenal (235 ind. cm-3), and the lowest in the hydroarenal (155 ind. cm-3). Irrespective of the lake trophy, Hymenostomata (Paramecium sp., Glaucoma sp., Uronema nigricans) occurred in the highest numbers (from 13 to 95%). The results demonstrated that N-NH4, P-PO4 and TOC can strongly regulate the abundance and taxonomic composition of ciliates. The strongest correlations between numbers of ciliates and physical and chemical water parameters were observed in the higro- and hydroarenal zones of the eutrophic lake.
    Celem pracy było poznanie struktury jakościowej i ilościowej orzęsków psammonowych w jeziorze mezotroficznym i eutroficznym (Pojezierze Łęczyńsko-Włodawskie). Analizowano również wpływ wybranych właściwości fizycznych i chemicznych wód na kształtowanie się tego specyficznego zespołu mikroorganizmów. Próby psammonu pobierano wiosną, latem i jesienią 2010 roku. W każdym zbiorniku, w psammolitoralu próby pobierano w euarenalu, higroarenalu i hydroarenalu. Łącznie stwierdzono 53 taksony orzęsków. Średnie zagęszczenie orzęsków wyniosło 516 osobn. cm-3 w jeziorze eutroficznym, zaś w mezotroficznym było niemal 2 razy niższe i osiągało 191 osobn. cm-3 piasku. W jeziorze Sumin najwyższe średnie zagęszczenie zanotowano w euarenalu 649 osobn.cm-3, najniższe zaś w higroarenalu (425 osobn. cm-3). W jeziorze mezotroficznym najwyższe średnie wartości liczebności zanotowano w higroarenalu 235 osobn. cm-3, najniższe zaś w hydroarenalu 155 osobn. cm-3. Najwyższą wartość wskaźnika Shanonna-Weavera odnotowano latem w jeziorze Sumin (2.79), w tym samym czasie w jeziorze Piaseczno odnotowano najniższą wartość tego współczynnika (0.79). Niezależnie od trofii jeziora największy udział w ogólnej liczebności orzęsków osiągały Hymenostomata (Paramecium sp., Glaucoma sp., Uronema nigricans) stanowiące od 13 do 95% ogólnej liczebności orzęsków. Stwierdzono istotne zależności pomiędzy obfitością orzęsków, a stężeniami w wodzie związków biogennych oraz całkowitego węgla organicznego, przy czym najsilniejsze korelacje odnotowano w strefach higro- i hydroarenalu jeziora eutroficznego.
    Źródło:
    Archives of Environmental Protection; 2012, 38, 2; 55-70
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uptake of plastic microbeads by ciliate Paramecium aurelia
    Autorzy:
    Nugroho, Failasuf Aulia
    Fyda, Janusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1402392.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowa Wyższa Szkoła Zawodowa w Tarnowie
    Tematy:
    microplastics
    particle
    ingestion
    ciliates
    Paramecium aurelia
    mikroplastik
    cząstka
    przyjmowanie pokarmu
    orzęski
    Opis:
    Microplastics (MPs) are small fraction of plastics that are less than 5 mm in length. They are bountiful and widespread pollutants in the aquatic environment. A wide range of organisms which play an important role in the food web, ingest microplastic particles and transfer them to the higher trophic levels. In this work, ingestion of fluorescent polystyrene beads 2 µm of diameter by ciliated protozoa Paramecium aurelia in different concentrations and times of exposure was studied. We studied also the ingestion and clearance rate as well as formation of food vacuoles. The highest uptake of beads by ciliates reached 1047.2 ± 414.46 particles after 10 min of incubation. Food vacuoles formation reflected the ingestion rate of P. aurelia, which increased at higher beads concentration up to the10th minute of incubation and decreased afterwards. On the contrary, the clearance rate persisted to be higher at low concentration. These findings showed that maximum capacity of microplastics ingestion by paramecia depended on beads concentration and on time of exposure.
    Źródło:
    Science, Technology and Innovation; 2020, 9, 2; 1-9
    2544-9125
    Pojawia się w:
    Science, Technology and Innovation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Past, Present and Future of Soil Protist Ecology
    Autorzy:
    Wilkinson, David M.
    Creevy, Angela L.
    Valentine, Julie
    Powiązania:
    https://bibliotekanauki.pl/articles/763720.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Testate amoebae, naked amoebae, flagellates, ciliates, diatoms, slime molds, algae, history, protozoology
    Opis:
    This essay introduces the special issue of this journal on the ecology of soil protists. This issue marks approximately the first 100 years of soil protistology as a discipline as some of the first studies to show that protozoa were an important part of soil ecology took place at Rothamsted, in southern England, towards the end of the first decade of the twentieth century. Much of the work on soil protists – and indeed the papers in this special issue – concentrate on traditional protozoa. In addition it is now realised that slime molds (Eumycetozoans) can potentially make an important contribution to the numbers and diversity of soil amoebae. We also argue that diatoms and other algae are likely important in soils and in need of more detailed study. By its nature microbiology (including soil protist ecology) is a science limited by technology – for example the subject could not really exist before the invention of the microscope. We suggest ways in which newer technologies (molecular methods, stable isotopes etc) may contribute to future studies on the ecology of soil protists.
    Źródło:
    Acta Protozoologica; 2012, 51, 3
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anaerobic Ciliates in Activated Sludge Communities
    Orzęski anaerobowe w osadzie czynnym
    Autorzy:
    Babko, R.
    Kuzmina, T.
    Pliashechnik, V.
    Łagód, G.
    Fyda, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818050.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    anaerobic ciliates
    activated sludge
    biological wastewater treatment
    orzęski anaerobowe
    osad czynny
    biologiczne oczyszczanie ścieków
    Opis:
    Występowanie wielu gatunków orzęsków beztlenowych w osadzie czynnym oczyszczalni ścieków pracujących w warunkach aerobowych było do tej pory stosunkowo rzadkie. W przypadku orzęsków beztlenowych, ich obecność traktowano jako sygnał informujący o pogorszeniu jakości osadu czynnego lub występowanie sytuacji zagrożenia dla tlenowego procesu biologicznego oczyszczania ścieków. Rozwój technologii biologicznego oczyszczania ścieków w celu zapewnienia skutecznego usuwania związków węgla, azotu oraz fosforu, doprowadził do uruchomienia nowej generacji oczyszczalni z bioreaktorami pracującymi w naprzemiennych warunkach beztlenowych, niedotlenionych i tlenowych. Wraz ze zmianą technologii powstaje pytanie co do konieczności zmian w rozumieniu i interpretacji miejsca i znaczenia orzęsków anaerobowych w zespołach osadu czynnego oraz ich roli jako indykatorów procesów oczyszczania ścieków. Regularne występowanie w osadzie czynnym, pochodzącym ze zmodyfikowanych oczyszczalni, obligatoryjnych lub fakultatywnych gatunków orzęsków anaerobowych, może być ważnym wskaźnikiem bilansu oraz zrównoważenia kolejnych faz procesu oczyszczania ścieków. W oparciu o przeprowadzone badania osadu czynnego z 15 oczyszczalni zlokalizowanych w Polsce można stwierdzić, że częstotliwość występowania orzęsków anaerobowych jest niska. W sumie zidentyfikowano 10 obligatoryjnych i fakultatywnych gatunków anaerobowych. W zmieniających się warunkach tlenowych/ anoksycznych /anaerobowych najczęściej obserwowane były H. discolor, A. uncinata, A. cicada, C. polypinum, E. coronata, L. lamella, P. rouxi, V. aquadulcis, P. elongatа. Rozwój badań w zakresie ekologii orzęsków anaerobowych, występujących w oczyszczalniach ścieków oraz w różnych systemach laboratoryjnych, pozwoli rozszerzyć możliwości interpretacji ich roli podczas oczyszczania ścieków metodą osadu czynnego oraz określić ich potencjał jako indykatorów odnośnie występujących warunków procesowych w nowoczesnych oczyszczalniach do zintegrowanego usuwania węgla azotu i fosforu.
    Źródło:
    Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 733-745
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Molecular and Morphological Snapshot Characterisation of the Protist Communities in Contrasting Alpine Glacier Forefields
    Autorzy:
    LAZZARO, Anna
    RISSE-BUHL, Ute
    BRANKATSCHK, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/763660.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Ciliates, flagellates, testate amoebae, deglaciated soils, bedrock geology, siliceous soils, calcareous soils, vegetation cover
    Opis:
    Phagotrophic protist diversity in oligotrophic soils such as alpine glacier forefields is still poorly studied. Combining morphologic observations with molecular-based analyses, we assessed the diversity of major phagotrophic protist groups in two contrasting glacier forefields in the Swiss Alps (Tiefen glacier forefield, siliceous bedrock, and Wildstrubel glacier forefield, calcareous bedrock), at sites differing in soil development. Ciliates and heterotrophic flagellates could be detected with both approaches, while amoebae could be observed only microscopically. Soils from Tiefen and Wildstrubel glacier forefields harboured distinctly different ciliate, flagellate and amoebae communities. The ciliate clone libraries from the Tiefen glacier forefield were dominated by Oligohymenophorea-related sequences while those from the Wildstrubel glacier forefield were dominated by Spirotrichea-related sequences. Testate amoebae morphospecies of the genera Corythion, Cryptodifflugia, Euglypha and Tracheleuglypha were restricted to the Tiefen glacier forefield, while Centropyxis and Trinema to the Wildstrubel one. No ciliate sequences and only a few ciliate and testate amoebae morphospecies could be retrieved from unvegetated soils of both glacier forefields. The ciliate and testate amoebae community detected at unvegetated sites were a subset of the community developed at vegetated sites. Overall, our results suggest that alpine glacier forefields are colonised by a diverse community of phagotrophic protists which seems to be shaped by bedrock geology and vegetation cover.
    Źródło:
    Acta Protozoologica; 2015, 54, 2
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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