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Guidelines for the Identification of Ciliates in Wastewater Treatment Plants

Guidelines for the Identification of Ciliates in Wastewater Treatment Plants

Susana Serrano | Lucia Arregui | Blanca Perez-Uz | Pilar Calvo | Almudena Guinea

(2008)

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Book Details

Abstract

Ciliated protozoa are one of the most relevant biological communities in the reactors of wastewater treatment plants. These organisms are excellent tools to assess the biological status of the reactor being used to monitor wastewater treatment plants performance. This book has been designed to simplify identification of ciliates, bearing in mind the difficulties on the manipulation and proper identification of these species. The specific role of ciliates in WWTP is discussed; methods for observation together with a glossary of scientific words and a simple and easy key to the taxonomic groups of ciliates are also provided. Illustrations, drawings, photographs and brief morphological descriptions of the species are included.  
Guidelines for the Identification of Ciliates in Wastewater Treatment Plants is the first book to use the new official classification proposed by the Society of Protozoologists (2005). It includes a complete chapter on methodology that is designed to be easy to follow and reproduce. A simple key to classify main taxonomic groups and genera is included, as are detailed descriptions to aid observation and identification of species of ciliates, in addition to drawings and photographs that accurately reproduce ciliate species.  

Table of Contents

Section Title Page Action Price
Contents 6
Glossary 8
About the Authors 11
Acknowledgements 11
Chapter 1: Introduction 12
1.1 WASTEWATER TREATMENT PLANTS: BIOLOGICAL DEPURATION 12
1.2 CILIATES IN WWTP BIOLOGICAL REACTORS 13
1.2.1 Ciliates as Bioindicators in WWTP 14
1.3 CLASSIFICATION OF CILIATES 15
Chapter 2: Methodologies to study ciliates in Wastewater Treatment Plants 18
2.1 INTRODUCTION 18
2.2 SAMPLING CILIATE POPULATIONS IN WWTP 19
2.2.1 Sampling activated sludge WWTP 19
2.2.2 Sampling fixed biofilm WWTP 20
2.3 COUNTING CILIATES IN WWTP 20
2.4 IDENTIFICATION OF CILIATES 22
2.4.1 Living observation 23
2.4.2 Silver staining techniques 25
2.4.2.1 Silver carbonate staining (Fernández-Galiano 1966) 25
2.4.2.2 Silver nitrate staining (Chatton and Lwoff 1930) 28
2.4.2.3 Silver Proteinate/Protargol staining (Kirby 1945) 29
2.4.3 Flutax staining of ciliates 31
2.5 THE INDICATOR VALUE OF CILIATES 31
Chapter 3: Systematic key to ciliate groups 34
3.1 KEY TO CILIATE GROUPS 34
Chapter 4: Guidelines for the identification of species in wastewater treatment plants 42
4.1 HETEROTRICHS 43
Cells elongated with a large terminal contractile vacuole: Spirostomum 44
Species: Spirostomum teres Claparède and Lachmann, 1858 44
Cells ellipsoidal or pyriform with tapered anterior end and rounded posterior end: Blepharisma 45
Species: Blepharisma undulans Stein, 1867 45
Species: Blepharisma americanum Suzuki, 1954 46
Cells trumpet-shaped or ovoid, sessile or free-swimming. Apical peristome with a clear AZM. The body is contractile by the presence of myonemes between kineties: Stentor 47
Species: Stentor roeselii Ehrenberg, 1835 47
4.2 OLIGOTRICHIDS 48
Cells with several equatorial groups of somatic cilia: Halteria 49
Species: Halteria grandinella ( Müller, 1773) Dujardin, 1841 49
4.3 HYPOTRICHS 50
Ciliates with a well developed anterior oral opening and AZM. No rows of marginal cirri. Long fronto-ventral and transverse cirri. Short caudal and marginal cirri (0-2): Euplotes 51
Species: Euplotes aediculatus Pierson, 1943 51
Species: Euplotes affinis Dujardin, 1842 52
Species with a small AZM and long frontal and transverse cirri: Aspidisca 53
Species: Aspidisca cicada (A. costata) (Müller, 1786) Claparède and Lachmann, 1858 53
Species: Aspidisca lynceus (Müller, 1773) Ehrenberg, 1830 54
4.4 STICHOTRICHS 55
Ciliates with three long caudal cirri with a “trident” arrangement. Anterior AZM reaching the middle ventral side: Stylonychia 56
Species: Stylonychia mytilus (Müller, 1773) Ehrenberg, 1830 56
Stichotrichs with three caudal cirri slightly longer than transverse ones. Anterior AZM reaching the anterior third part of the ventral side: Oxytricha 57
Species: Oxytricha fallax Stein, 1859 57
Species with a flexible body and a small AZM. Cirral pattern: rows of fronto-ventral and marginal cirri, J shaped transverse cirri: Uroleptus 58
Species: Uroleptus limnetis Stokes, 1885 58
4.5 TETRAHYMENIDS 59
Pyriform swimming cells: Tetrahymena 60
Species: Tetrahymena pyriformis (Ehrenberg, 1830) Lwoff, 1947 60
Species: Tetrahymena thermophila Nanney and McCoy, 1976 61
Ovoid cells with a torsion at the anterior body end: Dexiostoma/ Colpidium 62
Species: Dexiostoma campyla (syn. Colpidium campylum) (Stokes, 1886) Jankowski, 1967 62
Colpidium colpoda (Ehrenberg, 1831) Stein, 1869 63
Large oral opening with patent oral ciliature: Glaucoma 64
Species: Glaucoma scintillans Ehrenberg, 1830 64
4.6 PENICULIDS 65
Oval or elongated foot-shaped cells with an equatorial torsion where the oral cavity is clearly distinguished. Numerous somatic kineties with a cluster of long caudal cilia. Subpellicular striation corresponding to the cortical location of trichocysts: Paramecium 66
Species: Paramecium aurelia Müller, 1773 66
Species: Paramecium bursaria (Ehrenberg, 1831) Focke, 1836 67
Species: Paramecium caudatum Ehrenberg, 1833 68
Oval flattened cells with a conspicuous contractile vacuole. Anterior oral cavity and dense somatic ciliature: Frontonia 69
Species: Frontonia leucas (Ehrenberg, 1833) Ehrenberg, 1838 69
4.7 SCUTICOCILIATES 70
Cells with a large oral overture that reaches the half–body length. Truncate cilia-free anterior cap. The long paroral membrane is clearly visible when the ciliate stops to feed: Cyclidium 71
Species: Cyclidium glaucoma Müller, 1773 71
Oval ciliates with a non ciliated anterior pole. Oral overture does not reach the half-body length. Paroral membrane less patent than in Cyclidium. One caudal cilium: Uronema 72
Species: Uronema nigricans Müller, 1786 72
Dorso-ventrally flattened rounded ciliate. Posterior oral overture with a short AZM. Several caudal cilia. Subterminal contractile vacuole opposed to oral area: Cinetochilum 73
Species: Cinetochilum margaritaceum (Ehrenberg, 1831) Perty, 1849 73
Ovoid dark ciliate with a long caudal cilium. Anterior truncate apex without cilia. Anterior oral overture with a slightly prominent paroral kinety: Dexiotricha 74
Species: Dexiotricha granulosa Kent, 1881 74
4.8 PERITRICHS 75
Free-swimming ciliate. Somatic infraciliature is restricted to the aboral tuft of cilia: Astylozoon 76
Species: Astylozoon fallax Engelmann, 1862 76
Free-swimming cells without sessile stages. Barrel shape with a band of aboral ciliature clearly distinguished: Opisthonecta 77
Species: Opisthonecta henneguyi Fauré-Frèmiet, 1906 77
Sessile bell-like ciliates. Single zooids with a contractile peduncule (with internal spasmoneme): Vorticella 78
Vorticella aquadulcis complex 78
Vorticella infusionum complex 79
Vorticella microstoma complex 80
Vorticella convallaria complex 81
Vorticella campanula complex 82
Loricated peritrichs with one or two long zooids attached to the lorica without or with a short stalk. Lorica without valve: Vaginicola 83
Species: Vaginicola cristallina Fromentel, 1874 83
Lorica without stalk. One or two long zooids with a short stalk attaching to the lorica. Lorica with an anterior valve: Thuricola 84
Species: Thuricola kellicottiana Stokes, 1887 84
Colonial species with branched stalk with self-contained discontinuous spasmonemes (each stalked member of the colony contracts independently): Carchesium 85
Species: Carchesium polypinum (Linnaeus, 1758) Ehrenberg, 1831 85
Colonial species with branched stalk with continuous spasmonemes (all the zooids of the colony contract simultaneously): Zoothamnium 86
Species: Zoothamnium procerius Kahl, 1935 86
Stalked peritrichs without spasmoneme (no contractile colonies). Colonial species, occasionally single cells: Epistylis 87
Species: Epistylis plicatilis Ehrenberg, 1838 87
Species: Epistylis entzii Stiller, 1935 88
Species: Epistylis chrysemidis Bishop and Jahn, 1941 89
Colonial species with no contractile stalks. Characteristic opercule emerging from the peristomial opening. Without a conspicuous peristomial lip: Opercularia 90
Species: Opercularia coarctata (Claparede and Lachmann, 1858) Roux, 1901 90
Species: Opercularia microdiscum Fauré-Frèmiet, 1904 91
Species: Opercularia articulata Goldfuss, 1820 92
Species: Opercularia curvicaula (Penard, 1922) Curds, 1964 93
4.9 PRORODONTIDS 94
Apical cytostome. Homogeneous somatic ciliature. One or more caudal cilia. Alveolar plates regularly disposed on the ciliate body. Posterior contractile vacuole: Coleps 95
Species: Coleps hirtus (Müller, 1786) Nitzsch, 1827 95
4.10 HAPTORIDS 96
Apical or subapical oval cytostome with a short cytopharyngeal basket within the anterior pole. Homogeneous somatic ciliature. Posterior contractile vacuole: Enchelys 97
Species: Enchelys gasterosteus Kahl, 1926 97
Long retractile anterior neck-like extension (proboscis). Apical circumoral ciliature surrounding the cytostome. Homogeneous somatic ciliature: Lacrymaria 98
Species: Lacrymaria olor (Müller, 1786) Bory, 1824 98
Extensible latero-apical cytostome with patent fibrillar toxicysts. Homogeneous somatic ciliature: Spathidium 99
Species: Spathidium spathula (Müller, 1786) Woodruff and Spenser, 1922 99
Cytostome at the basis of an anterior proboscis. Patent cytopharingeal basket. Homogeneous somatic ciliature: Dileptus 100
Species: Dileptus anguillula Kahl, 1931 100
4.11 PLEUROSTOMATIDS 101
Lanceolated cells with a lateral body compression. Different somatic ciliature arrangement on right and left sides of the cell. Lateral cytostome with perioral ciliature (not curved). Two macronuclei and one central micronucleus usually visible with optical microscopy: Litonotus 102
Species: Litonotus lamella (Ehrenberg) Schewiakoff, 1896 102
Lanceolated ciliates with a characteristic torsion at the anterior end. Lateral cytostome and perioral ciliature (curved at the anterior part). Few somatic kineties. Two macronuclei and one central micronucleus: Acineria 103
Species: Acineria uncinata Tucolesco, 1962 103
4.12 PHYLOFARINGIDS 104
Dorso-ventrally flattened body. Ventral somatic ciliature at the right and left sides of the oral area (the anterior right somatic kineties curves preorally). Continuous preoral kinety and two circumoral kineties: Chilodonella 105
Species: Chilodonella uncinata (Ehrenberg, 1838) Strand, 1928 105
Dorso-ventrally flattened body. Somatic ciliature at the right and left sides of the ventral side. Fragmented preoral kinety with patent cilia: Pseudochilodonopsis 106
Species: Pseudochilodonopsis fluviatilis Foissner, 1988 106
Dorso-ventrally flattened body. Homogeneous ventral somatic ciliature. Continuous preoral kinety and two circumoral kineties: Trithigmostoma 107
Species: Trithigmostoma cucullulus (Müller, 1786) Jankowski, 1967 107
Dorso-ventrally flattened cell with an attaching posterior spine-like appendix. Somatic ciliature at left side of the ventral side. Two circumoral and two preoral kineties: Trochilia 108
Species: Trochilia minuta (Roux, 1901) Kahl, 1931 108
4.13 SUCTORIDS 109
Spherical trophonts, usually without lorica. Tentacles homogenously distributed: Podophrya 110
Species: Podophrya fixa (Müller, 1786) Ehrenberg, 1833 110
Sessile ciliates without lorica. Fascicles of fine tentacles: Tokophrya 111
Species: Tokophrya lemnarum (Stein, 1859) Entz, 1903 111
Sessile ciliates with a lorica. Two groups of tentacles placed on two anterior prominences: Acineta 112
Species: Acineta tuberosa (Pallas, 1766) Ehrenberg, 1833 112
Sessile loricated ciliates. Clusters of fine tentacles: Metacineta 113
Species: Metacineta mystacina (Ehrenberg, 1831) Butschli, 1889 113
Sessile ciliates with a stalk. Several groups of fine tentacles (lateral, anterior and posterior): Multifasciculatum 114
Species: Multifasciculatum elegans Goodrich and Jahn, 1943 114
Chapter 5: Bibliography 116
Index 126