72 results on '"Ciobanu, Marcel"'
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52. Soil nematode communities in three Natura 2000 sites of the Trascau Mountains (Romania)
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Ciobanu, Marcel, primary and Popovici, Iuliana, additional
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- 2015
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53. Enchodelus parahopedoroides Ciobanu & Popovici & Guerrero & Santiago 2010, sp. n
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Ciobanu, Marcel, Popovici, Iuliana, Guerrero, Pablo, and Santiago, Reyes Peña
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Dorylaimidae ,Enchodelus parahopedoroides ,Nematoda ,Enchodelus ,Dorylaimida ,Animalia ,Adenophorea ,Biodiversity ,Taxonomy - Abstract
Enchodelus parahopedoroides * sp. n. (Figs 3-5) MATERIAL EXAMINED Three females from the Bucegi Mountains, three females from the Retezat Mountains, one male from Vlădeasa Mountain, and one male from Bihor Mountains, all in acceptable condition. MEASUREMENTS See Table 4. DESCRIPTION Female Moderately slender nematodes of medium size, 1.44- 1.64 mm long. Habitus after fixation curved ventrad, Cshaped. Body cylindrical, tapering towards both ends, but more so anteriorly. Cuticle 2.0-2.5 µm in anterior region, 2.0-3.0 µm at mid-body and 7.0-7.5 µm on tail; its outer layer with very fine transverse striations and much thinner than inner one, especially on tail. Lateral chord 4.5- 7.0 µm wide or occupying 8-12% of mid-body diam., lacking any particular differentiation. Lateral pores obscure, one dorsal and one ventral pore prominent at odontostyle level. Lip region more or less rounded, offset by a distinct depression, 2.8-3.1 times as broad as high and ca one-third (32-36%) of body diam. at neck base. Lips amalgamated, labial and cephalic papillae visible, protruding above cephalic contour. Amphid fovea cup-shaped, opening at level of cephalic depression, occupying 8-10 µm or ca one-half (42-51%) of corresponding body diam. Cheilostom curly-bracket-shaped. Odontostyle comparatively robust, 11-14 times as long as wide, 1.5-1.6 times longer than lip region diam. or 1.6-2.0% of total body length, aperture small, 4-5 µm long or 14-17% of total length. Odontophore 1.4-1.6 times as long as odontostyle, with basal thickenings or flanges. Guiding ring double, located at 17-20 µm or 1.0-1.1 times lip region diam. from anterior end. Pharynx consisting of a slender muscular anterior portion expanding gradually, pharyngeal expansion occupying ca two-fifths (39-41%) of total neck length and ca one-half of corresponding body diam. Pharyngeal gland nuclei located as follows: DN = 64-67; S 1 N 1 obscure; S 1 N 2 = 75-78; S 2 N = 85-87. Cardia rounded conoid, nearly as long as broad, (12-18) × (10-13) µm. Genital system didelphic-amphidelphic, both branches equally and well developed, anterior branch 240- 293 µm, posterior branch 215-280 µm long. Ovaries 53- 140 µm long, not reaching sphincter level; oocytes initially in two or more rows, then in one row. Oviduct 65- 105 µm or 1.2-1.9 corresponding body diam. long, consisting of a slender portion with prismatic cells and a moderately developed pars dilatata with visible lumen. Sphincter prominent, located between oviduct and uterus. Uterus long, 133-170 µm or 2.4-3.1 corresponding body diam., sometimes twisted, tripartite, i.e.: consisting of a wider proximal region with distinct lumen followed by a narrower and shorter intermediate portion with narrow lumen and surrounded by a cluster of hyaline cells, and ending with a well developed spheroid pars dilatata distalis. Vagina extending inwards 27-32 µm or 47-58% of body diam., pars proximalis longer than broad, (18-22) × (11-15) µm, with sigmoid to straight walls and enveloped by weak circular musculature; pars refringens with (in lateral view) two trapezoidal sclerotisations measuring (3.0- 4.5) × (6-8) µm and with a combined width of 12-15 µm; pars distalis 4.0-5.0 µm long. Vulva a transverse oval slit, preceded by a shallow depression in body surface. Prerectum 3.9-5.7 and rectum 0.9-1.4 anal body diam. long. Tail rounded conoid, in one specimen with a few small saccate bodies, inner cuticle layer marked by radial striation, its ventral margin slightly irregular, barely separated from outer layer. Two pairs of subterminal caudal pores, one subdorsal, another practically lateral. Male (see remarks) General morphology similar to that of female, but with more slender body, narrower lip region and slightly shorter odontophore. Genital system diorchic, with opposed testes. In addition to adcloacal pair at 11 or 10.5 µm from cloacal aperture, presence of series of nine ventromedian supplements 10-24 µm apart, posteriormost supplement located at 31 or 32.5 µm from adcloacal pair, barely in anterior to, or at level of, anterior end of spicules. Spicules well curved ventrad, rather robust, ca 5.1 or 6.0 times as long as wide or 1.6 or 1.9 anal body diam. long. Lateral guiding pieces 9.5 or 11.5 µm, ca 4.8 or 3.8 times as long as wide. Tail similar to that of female. * The specific epithet indicates the resemblance of this species to E. hopedoroides. DIAGNOSIS AND RELATIONSHIPS Enchodelus parahopedoroides sp. n. is distinguished by its 1.44-1.64 mm long body, lip region 17.0-18.5 µm diam. and offset by a marked depression, odontostyle 26-28 µm or 1.5-1.6 lip region diam. long and 1.6- 2.0% of total body length, odontophore 40-43 µm long and with distinct basal knobs and flanges, neck 300- 328 µm long, pharyngeal expansion 120-130 µm long or 39-41% of total neck length, female genital system amphidelphic, uterus long and tripartite, pars refringens vaginae with two trapezoidal sclerotisations, V = 45- 52, tail rounded conoid (20-24 µm long, c = 63-80, cļ = 0.6-0.8), spicules 59-67 µm long, and nine spaced ventromedian supplements starting just anterior to, or at level of, anterior end of spicules. Enchodelus parahopedoroides sp. n. is very similar to E. hopedoroides Altherr, 1963 (see description by Guerrero et al., 2008b), from which it differs in its narrower lateral chord (4.5-7.0 µm or 8-12% of body diam. vs 8-16 µm or 11-27% of body diam., respectively), shorter odontostyle (26-28 vs 31-34 µm, n = 23), pars refringens vaginae without vs with two massive and granular appearing pieces, vulva more posterior (V = 45-52 vs = 40-47), and female tail lacking abundant saccate bodies and any peculiar differentiation of the cuticle vs saccate bodies abundant and inner cuticle layer divided into two by a discontinuity, its ventral margin rather irregular and somewhat separated from the outer layer. In spite of the high similarity between both species, there are three features (odontostyle length, nature of pars refringens vaginae and female tail) that support the proposal of a new taxon for the Romanian material. In having an odontostyle less than 30 µm long and rounded tail, the new species is also close to E. altherri Vinciguerra & de Francisci, 1973, E. ameliae Guerrero, Liébanas & Peña-Santiago, 2008, E. analatus (Ditlevsen, 1927) Thorne, 1939, E. arcticus Nesterov, 1976, E. georgiensis Eliava, Tskitishvili & Bagathuria, 2006, E. hopedorus (Thorne, 1929) Thorne, 1939, E. longispiculus Guerrero, Liébanas & Peña-Santiago, 2008 and E. ponorensis Popovici, 1995. It differs from E. altherri in its longer body (vs 1.18-1.38 mm), comparatively longer odontostyle at 1.5-1.6 vs 1.8-2.0 lip region diam. long (i.e., 1.8 according to the original Figure 2A of E. altherri and 2.0 according to the original description), longer neck (vs 236-276 µm, as calculated from original description), vagina with well developed pars refringens (vs “vulva debolmente ispessita”), tail of both female and male more rounded vs conoid, shorter (vs c = 41- 59, cļ = 1.0, calculated from original illustrations) and lacking saccate bodies vs 3-8 saccate bodies present, and longer spicules (vs 50-52 µm). From E. ameliae in its less marked lip region (vs offset by constriction), shorter odontostyle (vs 30-33 µm, n = 11, including females and males), longer neck (vs 268-307 µm) and pharyngeal expansion (vs 95-107 µm), and fewer (vs 11-14) ventromedian supplements, the posteriormost located barely anterior to, or at level of, the anterior end of the spicules vs one or two within the range of the spicules. From E. analatus in its shorter odontostyle (vs 30-34 µm), pars refringens vaginae present vs absent and shorter female tail (vs c = 40-55, cļ = 0.8-1.1) which lacks vs presence of saccate bodies. From E. arcticus in its broader lip region (vs 12 µm, as inferred from original description), longer odontophore (vs up to 36 µm, as inferred from original description) and ventromedian supplements present vs reportedly absent (!). From E. georgiensis in its longer body (vs 0.88-1.10 mm), broader lip region (vs 12 µm), longer odontophore (vs 35-37 µm) and longer spicules (vs 36- 44 µm). From E. hopedorus in its broader female lip region (vs 14.5-16 µm), comparatively shorter odontostyle (vs 1.9-2.2 times the lip region diam.), longer pharyngeal expansion (vs 33-38% of total neck length) and shorter female tail (vs 27-39 µm, c = 41-53) lacking vs bearing abundant saccate bodies. From E. longispiculus in its more slender body (a = 26-30 vs 17-25; body diam. at mid-body = 50-57 vs 64-80 µm), longer pharyngeal expansion (vs 77-114 µm or 28-37% of total neck length, n = 40), somewhat more posterior vulva (vs V = 41- 48) and posteriormost ventromedian supplement located barely anterior to, or at level of, anterior end of spicules (vs two posteriormost, occasionally only one, within range of spicules). Finally, from E. ponorensis, the other Romanian species, in its shorter body (vs 1.6-2.1 mm), narrower lateral chord (vs one-fourth of mid-body diam.) broader female lip region (vs 15-16 µm), longer odontostyle (vs 23-25 µm), uterus tripartite vs bipartite, and shorter female tail (vs 35-45 µm, c = 41-56, cļ = 0.9- 1.3). TYPE HABITAT AND LOCALITY Cliff vegetation, Caraiman Peak, Bucegi Mountains (Southern Romanian Carpathians); site 5 in Table 1. OTHER HABITATS AND LOCALITIES Cliff vegetation on Albele Peak, Retezat Mountains (Southern Romanian Carpathians), mountainous grassland at Dealul Caprei, Vlădeasa Mountain (Western Romanian Carpathians) and spruce forest in a swamp area on the Padiş karstic plateau, Bihor Mountains (Western Romanian Carpathians); sites 9, 11 and 4 in Table 1. TYPE MATERIAL Holotype female on slide 1317 and one paratype female (1318/c) deposited in the nematode collection of the Institute of Biological Research, Cluj-Napoca, Romania. Slide 1316 containing one paratype female deposited in the nematode collection of Departamento de Biología Animal, Biología Vegetal y Ecología, University of Jaén, Spain. REMARKS Some doubts persist as to the conspecifity of the two males examined, which were collected from the Vlădeasa and Bihor Mountains whilst the females came from the Bucegi and Retezat Mountains, as there are some morphometrical differences, particularly their narrower lip region in addition to their different geographical origin. Nevertheless, some significant features, such as odontostyle and pharyngeal expansion lengths are similar to those found in females and serve to distinguish the males from E. longispiculus, the most similar species. In addition, as mentioned above, the male posteriormost ventromedian supplement is located barely anterior to, or at level of, the anterior end of the spicule, whereas in other species at least one ventromedian supplement is present within the range of the spicules. Thus, the males are provisionally considered to belong to the same species as the females from Bucegi and Retezat Mountains.
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- 2009
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54. Enchodelus ponorensis Popovici 1995
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Ciobanu, Marcel, Popovici, Iuliana, Guerrero, Pablo, and Santiago, Reyes Peña
- Subjects
Dorylaimidae ,Nematoda ,Enchodelus ,Dorylaimida ,Animalia ,Adenophorea ,Enchodelus ponorensis ,Biodiversity ,Taxonomy - Abstract
Enchodelus ponorensis Popovici, 1995 (Fig. 6) MATERIAL EXAMINED Six female paratypes, in not very good condition, collected from the Poiana Ponor area located within the Padiş karstic plateau, Bihor Mountains (Western Romanian Carpathians); sites 1 and 3 in Table 1. MEASUREMENTS See Table 3. Female (based on material examined) Slender nematodes of medium size, 1.63-2.04 mm long. Habitus after fixation curved ventrad, C-shaped. Body cylindrical, tapering towards both ends, but more so anteriorly. Cuticle 3.0 µm in anterior region, 3.0-4.0 µm at mid-body 7.0-8.0 µm on dorsal region of tail, and 11- 13 µm at tail terminus, its outer layer with very fine transverse striations and much thinner than inner one, especially on tail. Lateral chord 16-19 µm wide or occupying almost one-third (29-33%) of mid-body diam., lacking any particular differentiation. Body pores, if present, inconspicuous. Lip region more or less rounded, offset by a marked constriction, 2.5-3.0 times as broad as high and ca one-third (29-33%) of body diam. at neck base. Lips amalgamated, labial and cephalic papillae inconspicuous, barely protruding above cephalic contour. Amphid fovea cup-shaped, opening at level of cephalic depression, occupying 6.0-6.5 µm ca two-fifths (38-41%) of corresponding body diam. Cheilostom almost cylindrical. Odontostyle comparatively robust, 8.2-10.4 times as long as wide, 1.5-1.6 times longer than lip region diam. or 1.3-1.6% of total body length, aperture small, but precise extent not distinguishable in material examined. Odontophore 1.2-1.4 times as long as odontostyle, with small basal thickenings, no evidence of knobs or flanges observed. Guiding ring double, located at 14-16 µm or 0.8- 0.9 times lip region diam. from anterior end. Pharynx consisting of a slender muscular anterior portion expanding gradually; pharyngeal expansion occupying ca two-fifths (37-45%) of total neck length, 5.5-7.2 times as long as wide or 3.0-3.4 times corresponding body diam. Pharyngeal gland nuclei located as follows: DN = 62-67; S 1 N obscure; S 2 N = 80-85. Cardia rounded conoid, nearly as long as broad, (13-20) × (12-15) µm. Genital system didelphic-amphidelphic; both branches equally and well developed, anterior branch 155-225 µm, posterior branch 180-228 µm long. Ovaries 66-130 µm long, often extending to sphincter level, oocytes initially in two or more rows, then in one row. Oviduct 60-88 µm or 1.0-1.5 corresponding body diam. long, consisting of a slender portion with prismatic cells and a moderately developed pars dilatata with visible lumen. Sphincter prominent, located between oviduct and uterus. Uterus long, 70-90 µm or 1.2-1.6 times corresponding body diam., bipartite, i.e., consisting of a wider proximal region with distinct lumen followed by a narrower and shorter distal portion with narrow lumen and surrounded by a cluster of hyaline cells. Vagina extending inwards 30-33 µm or 54-59% of body diam., pars proximalis nearly as long as broad, (14-15) × (11-15) µm, with sigmoid to straight walls and enveloped by weak circular musculature; pars refringens with (in lateral view) two trapezoidal sclerotisations measuring (3.0- 5.0) × (8.0-9.0) µm and with a combined width of 16- 18 µm, pars distalis 4.0-5.0 µm long. Vulva a transverse slit. Prerectum 6.0-6.6 and rectum 1.1-1.3 anal body diam. long. Tail conoid, slightly straighter ventrally, most specimens lacking saccate bodies. Two pairs of caudal pores at middle of tail, one subdorsal, another practically lateral. The genus Enchodelus from Romania Male Unknown. DIAGNOSIS Based on the original description and the present study, E. ponorensis is distinguished by its 1.63-2.07 mm long body, lip region offset by a marked constriction and 15- 16.5 µm diam., odontostyle 23-26 µm or 1.5-1.6 lip region diam. long and comprising 1.3-1.6% of total body length, odontophore 31-38 µm long and with small thickenings, neck 355-520 µm long, pharyngeal expansion 150-245 µm long or 41-47% of total neck length, female genital system amphidelphic, uterus short and bipartite, pars refringens vaginae with two trapezoidal sclerotisations, V = 44-52, tail rounded conoid (35-45 µm long, c = 40-57, cļ = 0.9-1.3) and males unknown. REMARKS The description herein perfectly agrees with the original one (Popovici, 1995), although some additional morphological details have now been incorporated, especially those concerning the female genital system. Enchodelus ponorensis is an interesting taxon within the genus. It is an atypical round-tailed species due to its comparatively short, bipartite uterus, whereas all other similar species examined by the authors (Guerrero & Peña-Santiago, 2007; Guerrero et al., 2008a, b) are characterised by having a long, tripartite uterus, only E. macrodorus showing a shorter, but distinctly tripartite, uterus. Thus, somewhat surprisingly, in its short, bipartite uterus, E. ponorensis resembles the conical-tailed species of the genus (see Guerrero & Peña-Santiago, 2007; Guerrero et al., 2008b). On the other hand, E. ponorensis is peculiar in having a relatively short and robust (8-10 times as long as wide) odontostyle, long pharyngeal expansion and comparatively longer and more conoid female tail, similar to that found in some species of the genus Crassolabium Yeates, 1967 (= Thonus Thorne, 1974), for instance C. tenuistylum (Ciobanu, Popovici, Abolafia & Peña-Santiago, 2008) Peña-Santiago & Ciobanu, 2008, also known from Romania. Nevertheless, E. ponorensis conforms better to the general pattern of Enchodelus in the form of its lip region, odontophore, location of S 2 N and uterus., Published as part of Ciobanu, Marcel, Popovici, Iuliana, Guerrero, Pablo & Santiago, Reyes Peña-, 2010, Nematodes of the order Dorylaimida from Romania. The genus Enchodelus Thorne, 1939. 2. Species with rounded tail and medium-sized odontostyle, pp. 381-397 in Nematology 12 (3) on pages 394-396, DOI: 10.1163/138855409X12549869072329, http://zenodo.org/record/8111660, {"references":["POPOVICI, I. (1995). New species of Tubixaba and Enchodelus (Nematoda: Dorylaimida) from Romania. Nematologica 41, 435 - 448.","GUERRERO, P., LIEBANAS, G. & PENA- SANTIAGO, R. (2008 a). Nematodes of the order Dorylaimida from Andalucia Oriental, Spain. The genus Enchodelus Thorne, 1939. 2. Description of three known species with rounded tail and long odontostyle. Nematology 10, 451 - 470.","GUERRERO, P., LIEBANAS, G. & PENA- SANTIAGO, R. (2008 b). Nematodes of the order Dorylaimida from Andalucia Oriental, Spain. The genus Enchodelus Thorne, 1939. 3. Description of two new and one known species with rounded tail and medium-sized odontostyle. Nematology 10, 711 - 733.","CIOBANU, M., POPOVICI, I., ABOLAFIA, J. & PENA-SANTIAGO, R. (2008). Nematodes of the order Dorylaimida from Romania. The genus Thonus Thorne, 1974. Part II. Nematology 10, 167 - 188.","CIOBANU, M., POPOVICI, I., ABOLAFIA, J. & PENA- SANTIAGO, R. (2008). Nematodes of the order Dorylaimida from Romania. The genus Thonus Thorne, 1974. Part II. Nematology 10, 167 - 188."]}
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- 2009
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55. Enchodelus longispiculus Guerrero, Liebanas & Pena-Santiago 2008
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Ciobanu, Marcel, Popovici, Iuliana, Guerrero, Pablo, and Santiago, Reyes Peña
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Dorylaimidae ,Enchodelus longispiculus ,Nematoda ,Enchodelus ,Dorylaimida ,Animalia ,Adenophorea ,Biodiversity ,Taxonomy - Abstract
Enchodelus longispiculus Guerrero, Liébanas & Peña-Santiago, 2008 (Fig. 1) MATERIAL EXAMINED Eighteen females and 11 males from five localities: Gilău Mountains (one female); Retezat Mountains (two populations, one consisting of four females and five males and the other including seven females and two males, respectively); Trascău Mountains (two females and three males); and Vrancei Mountains (four females and one male). MEASUREMENTS See Table 2. DISTRIBUTION Beech forest growing in the Ierii Valley, Gilău Mountains (Western Romanian Carpathians); cliff vegetation on Albele Peak, Retezat Mountains (Southern Romanian Carpathians); cliff vegetation in the Piatra Iorgovanului area, Retezat Mountains; grassland on a mild slope at Tureni Gorges, Trascău Mountains (Western Romanian Carpathians); and cliff vegetation at Cheile Tişiţei, Vrancei Mountains (Eastern Romanian Carpathians); sites 6, 9, 8, 10 and 12 in Table 1. * Corresponding author, e-mail: icb@cluj.astral.ro © Koninklijke Brill NV, Leiden, 2010 Also available online - www.brill.nl/nemy * According to Coldea (1991), Pop et al. (1973) and Coldea (1993). ** According to the Romanian System of Soil Classification (Conea et al., 1980). REMARKS The description of the material herein studied fits that of the Iberian populations well, although the Romanian specimens display a wider variability in several morphological or morphometrical features, such as odontostyle length (24-34 vs 27-31 µm) and vulva position (42.2-51.5 vs 41.0-47.8). The morphology of the vagina in the Romanian females deserves a special discussion. A few (four out of 18) specimens examined had the pars refringens well developed and nearly identical to that described in the type and other Iberian populations. In the remaining females, however, the pars refringens is poorly developed, even lacking or impossible to distinguish from the pars distalis. Such intraspecific variation was observed among females collected from the same locality, and represents a very unusual feature in dorylaims in which the pars refringens is either present or absent, such a condition being often assumed to represent a good diagnostic character to separate species belonging to the same genus. This is the first record of the species in Romania., Published as part of Ciobanu, Marcel, Popovici, Iuliana, Guerrero, Pablo & Santiago, Reyes Peña-, 2010, Nematodes of the order Dorylaimida from Romania. The genus Enchodelus Thorne, 1939. 2. Species with rounded tail and medium-sized odontostyle, pp. 381-397 in Nematology 12 (3) on pages 381-382, DOI: 10.1163/138855409X12549869072329, http://zenodo.org/record/8111660, {"references":["GUERRERO, P., LIEBANAS, G. & PENA- SANTIAGO, R. (2008 a). Nematodes of the order Dorylaimida from Andalucia Oriental, Spain. The genus Enchodelus Thorne, 1939. 2. Description of three known species with rounded tail and long odontostyle. Nematology 10, 451 - 470.","COLDEA, G. (1991). Prodrome des associations vegetales des Carpates du Sud-Est (Carpates Roumaines). Documents Phytosociologiques, Camerino 13, 317 - 539.","POP, E., BOSCAIU, N. & RADULESCU, D. (1973). L'efficacite de la protection de la tourbiere de Lucina (dep. Suceava, Roumanie). Studii si Comunicari de Ocrotirea Naturii 3, 21 - 28.","COLDEA, G. (1993). Cormofite. Sintaxonomia si descrierea asocia ¸ tiilor vegetale. In: Popovici, I. (Ed.). Parcul national Retezat-Studii ecologice. Brasov, Romania, Editura West Side, pp. 31 - 48.","CONEA, A., FLOREA, N. & PUIU, S. (EDS) (1980). Sistemul roman de clasificare a solurilor. ASAS, Institutul de Cercetari Pedologice si Agronomice. Metode, rapoarte, indrumari 12, 178 pp."]}
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- 2009
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56. Enchodelus lucinensis Popovici 1978
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Ciobanu, Marcel, Popovici, Iuliana, Guerrero, Pablo, and Santiago, Reyes Peña
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Dorylaimidae ,Nematoda ,Enchodelus ,Dorylaimida ,Animalia ,Adenophorea ,Biodiversity ,Enchodelus lucinensis ,Taxonomy - Abstract
Enchodelus lucinensis Popovici, 1978 (Fig. 2) MATERIAL EXAMINED Four female paratypes, in acceptable condition, and two males (but see remarks) from Bihor Mountains, in a good state of conservation. MEASUREMENTS See Table 3. DESCRIPTION Female Moderately slender nematodes of medium size, 1.24- 1.46 mm long. Habitus after fixation curved ventrad, Cshaped. Body cylindrical, tapering towards both ends, but more so anteriorly. Cuticle 2.0 µm in anterior region, 3.0-4.5 µm at mid-body and 6.0-8.0 µm on dorsal side of tail, its outer layer with fine, but distinct transverse striations and much thinner than inner one, especially on tail. Lateral chord 11-15 µm wide or occupying one-fifth to one-fourth (21-26%) of mid-body diam., lacking any particular differentiation. Body pores obscure in material examined. Lip region somewhat angular, offset by a weak depression, 2.2-2.6 times as broad as high, ca one-fourth (22-28%) of body diam. at neck base. Lips amalgamated, labial and cephalic papillae slightly protruding above cephalic contour. Amphid fovea funnel-shaped, opening at level of cephalic depression, occupying 5-6 µm or ca one-half of corresponding body diam. Cheilostom almost cylindrical, with thick walls. Odontostyle comparatively robust, 10-14 times as long as wide and 1.6-1.9 times longer than lip region diam. or 1.4-1.7% of total body length, aperture small, 4-5 µm long or 14-17% of total length. Odontophore 1.4-1.5 times as long as odontostyle, lacking distinct basal thickenings or flanges (but see remarks). Guiding ring double, located at 10-12 µm or 1.1-1.3 lip region diam. from anterior end. Pharynx consisting of a slender muscular anterior portion gradually expanding, pharyngeal expansion occupying more than two-fifths (44-46%) of total neck length and ca one-half of corresponding body diam. Pharyngeal gland nuclei located as follows: DN = 61-65; S 1 N obscure; S 2 N = 83-86. Nerve ring at 85-112 µm from anterior end or 36-38% of total neck length. Cardia rounded conoid, nearly as long as broad, (10-15) × (11-14) µm in size. Genital system didelphic-amphidelphic; both branches equally and well developed: anterior branch 262-293 µm, posterior branch 310-353 µm long. Ovaries 80-109 µm long, usually reaching or slightly surpassing sphincter level; oocytes initially in two or more rows, then one. Oviduct 70-87 µm, or 1.3-1.4 corresponding body diam. long, consisting of a slender portion with prismatic cells and a moderately developed pars dilatata with visible lumen. Sphincter prominent, located between oviduct and uterus. Uterus long, 153-203 µm or 3.1-3.9 corresponding body diam., more or less twisted in females examined, tripartite, i.e., consisting of a wider proximal region with distinct lumen followed by a narrower and shorter intermediate portion with narrow lumen and surrounded by a cluster of hyaline cells, and ending with a well developed spheroid pars dilatata distalis. Sperm often abundant in proximal region of uteri. Vagina extending inwards 25-32 µm for one-half to three-fifths (51-61%) of body diam., pars proximalis longer than broad, (14-15) × (10-14) µm, usually with straight walls and enveloped by weak circular musculature, pars refringens with (in lateral view) two massive, granular, square sclerotisations measuring (5.0-6.0) × (6.0-7.0) µm and with a combined width of 13-14 µm; pars distalis 4.0 µm long. Vulva a transverse oval slit, preceded by a pronounced depression in body surface. Prerectum 2.2-2.9 and rectum 0.7-1.1 anal body diam. long. Tail short, rounded conoid, with abundant and distinct saccate bodies along ventral region, inner cuticle layer marked by radial striation, its ventral margin slightly irregular, barely separated from outer layer, cuticle 8-10 µm thick or 40-60% of tail length at terminus. Two pairs of subterminal caudal pores, one subdorsal, another practically lateral. Male (see remarks) General morphology similar to that of female, but with somewhat shorter body, 1.13 mm long. Genital system diorchic, with opposed testes. In addition to adcloacal pair, located at 10 µm from cloacal aperture, a series of seven or nine spaced ventromedian supplements, 8- 25 µm apart, extending anteriorly, posteriormost located at 17 or 22 µm from adcloacal pair, well within range of spicules. Other supplement located at level of anterior end of spicules. Spicules conspicuously robust, 3.8 or 4.2 times as long as wide and 2.1 or 2.3 anal body diam. long. Lateral guiding pieces 12 or 12.5 µm long, ca four times as long as wide. Tail somewhat more conoid than in female, saccate bodies present, but not so distinct (certainly due to fixation). DIAGNOSIS AND RELATIONSHIPS This diagnosis is based on the original description and a re-examination of the paratypes. Enchodelus lucinensis is distinguished by its 1.24-1.62 mm long body, lip region offset by weak depression and 11-14 µm diam., odontostyle 19-23 µm or 1.6-1.9 lip region diam. long and 1.4-1.7% of total body length, odontophore rod-like (but see remarks) and 29-32 µm long, neck length 238- 286 µm long, pharyngeal expansion 111-132 µm long or 42-46% of total neck length, female genital system amphidelphic, uterus long and tripartite, pars refringens vaginae with two massive and granular sclerotisations, V = 45-53, tail rounded conoid (18-21 µm long, c = 61- 76, cļ = 0.5-0.7), spicules 50-56 µm long and 7-9 spaced ventromedian supplements, the posteriormost one or two within the range of the spicules. In having a comparatively small body (E. lucinensis resembles E. teres Thorne, 1939 and E. parateres Baqri & Jairajpuri, 1974. It differs from E. teres, a nearly identical species (see remarks) in its longer pharyngeal expansion (vs ca two-fifths of total neck length) and shorter tail with less saccate bodies (vs 30 µm, c = 50, cļ = 1.0 as calculated from Thorne’s original drawing). Moreover, Thorne mentioned that the ovaries were “reflexed halfway to vulva”, an indication that the female genital tract is relatively short and the uterus (tentatively) not very long. It can be distinguished from E. parateres by its lip region offset by depression (vs deep constriction), longer pharyngeal expansion (vs 34- 40% of total neck length) and uterus tripartite (vs bipartite, lacking a spherical distal section). DISTRIBUTION Peat bog at Lucina nature reserve (Suceava District, Northern Moldavia; type locality) and mezohygrophilous meadow at Gheţar-Scărişoara, Bihor Mountains (Western Romanian Carpathians); sites 7 and 2 in Table 1. REMARKS As expected, the above description perfectly fits the original although new morphological details are added herein, particular for the female genital system. Some doubts persist as to the true identity and/or taxonomy of E. lucinensis. The precise nature of the odontophore base could not be assessed with accuracy in the available specimens, but the observations suggest that it is simple, rod-like, at most with weak basal thickening and without evidence of distinct knobs or flanges, i.e., in agreement with the original description. Its separation from E. teres is very problematic and based (see above) on minor differences. Unfortunately, available information about this species is very poor and many important morphological details are lacking, therefore preventing a detailed comparison. Zullini (1970) recorded E. teres from Italy, but only provided its basic ratios which, however, fit well with those of both E. lucinensis and E. teres. Until additional information about E. teres is available, separate status for these two species should be maintained. Some doubts persist as to the conspecificity of the two males from the Bihor Mountains with the four female paratypes due to their shorter body and, mainly, because of their separate geographical origin. However, the general morphology and morphometry are very similar, including lip region diam., odontostyle length, etc., and the morphology of male sexual structures is practically identical with the only male paratype known. Thus, they are provisionally considered to belong to E. lucinensis., Published as part of Ciobanu, Marcel, Popovici, Iuliana, Guerrero, Pablo & Santiago, Reyes Peña-, 2010, Nematodes of the order Dorylaimida from Romania. The genus Enchodelus Thorne, 1939. 2. Species with rounded tail and medium-sized odontostyle, pp. 381-397 in Nematology 12 (3) on pages 382-387, DOI: 10.1163/138855409X12549869072329, http://zenodo.org/record/8111660, {"references":["POPOVICI, I. (1978). New nematode species (Nematoda, Dorylaimida) from Romania. Nematologica 24, 404 - 411.","GUERRERO, P., LIEBANAS, G. & PENA- SANTIAGO, R. (2008 a). Nematodes of the order Dorylaimida from Andalucia Oriental, Spain. The genus Enchodelus Thorne, 1939. 2. Description of three known species with rounded tail and long odontostyle. Nematology 10, 451 - 470.","POPOVICI, I. (1995). New species of Tubixaba and Enchodelus (Nematoda: Dorylaimida) from Romania. Nematologica 41, 435 - 448.","THORNE, G. (1939). A monograph of the nematodes of the superfamily Dorylaimoidea. Capita Zoologica 8, 1 - 261.","BAQRI, Q. H. & JAIRAJPURI, M. S. (1974). Nematodes of high altitudes in India. V. Five new species of the genus Enchodelus Thorne, 1939 (Dorylaimida). Nematologica 20, 131 - 146.","ZULLINI, A. (1970). I nematodo muscicoli della Val Zebru' (Parco Nazionale dello Stelvio). Istituto Lombardo (Rendiconti Scienze) B 104, 88 - 137."]}
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- 2009
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57. Effects of soil warming history on the performances of congeneric temperate and boreal herbaceous plant species and their associations with soil biota.
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Thakur, Madhav P., Reich, Peter B., Wagg, Cameron, Fisichelli, Nicholas A., Ciobanu, Marcel, Hobbie, Sarah E., Rich, Roy L., Stefanski, Artur, and Eisenhauer, Nico
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SOIL heating ,HERBACEOUS plants ,PLANT species ,PLANT growth ,PLANT nutrition - Abstract
Aims Climate warming raises the probability of range expansions of warm-adapted temperate species into areas currently dominated by cold-adapted boreal species. Warming-induced plant range expansions could partly depend on how warming modifies relationships with soil biota that promote plant growth, such as by mineralizing nutrients. Here, we grew two pairs of congeneric herbaceous plants species together in soil with a 5-year warming history (ambient, +1.7°C, +3.4°C) and related their performances to plant-beneficial soil biota. Methods Each plant pair belonged to either the mid-latitude temperate climate or the higher latitude southern boreal climate. Warmed soils were extracted from a chamberless heating experiment at two field sites in the temperate-boreal ecotone of North America. To isolate potential effects of different soil warming histories, air temperature for the greenhouse experiment was identical across soils. We hypothesized that soil with a 5-year warming history in the field would enhance the performance of temperate plant species more than boreal plant species and expected improved plant performances to have positive associations with plant growth-promoting soil biota (microbial-feeding nematodes and arbuscular mycorrhizal fungi). Important Findings Our main hypothesis was partly confirmed as only one temperate species performed better in soil with warming history than in soil with history of ambient temperature. Further, this effect was restricted to the site with higher soil water content in the growing season of the sampling year (prior to soil collection). One of the boreal species performed consistently worse in previously warmed soil, whereas the other species showed neutral responses to soil warming history. We found a positive correlation between the density of microbial-feeding nematodes and the performance of one of the temperate species in previously wetter soils, but this correlation was negative at the site with previously drier soil. We found no significant correlations between the performance of the other temperate species as well as the two boreal species and any of the studied soil biota. Our results indicate that soil warming can modify the relation between certain plant species and microbial-feeding nematodes in given soil edaphic conditions, which might be important for plant performance in the temperate-boreal ecotone. [ABSTRACT FROM AUTHOR]
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- 2017
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58. Characterization of Iberian species of the genus Pungentus Thorne & Swanger, 1936 (Nematoda, Dorylaimida, Nordiidae)
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Pena-Santiago, Reyes, Ciobanu, Marcel, Abolafia, Joaquin, Pena-Santiago, Reyes, Ciobanu, Marcel, and Abolafia, Joaquin
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Several populations of four known species of the genus Pungentus (P. clavatus, P. engadinensis, P. marietani and P. silvestris), collected in the wild and in cultivated soils from the Iberian Peninsula, are studied. Detailed redescriptions and morphometrics are presented for each species. Illustrations are provided, including line drawings, light microscopy pictures of the four species as well as scanning electron microscopy observations of P. engadinensis. The Iberian populations are compared to type and other known populations, and new data are given that provide a better characterization of these taxa. Pungentus engadinensis is the most widely distributed species in the Iberian Peninsula.
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- 2013
59. Characterization of Iberian species of the genus Pungentus Thorne & Swanger, 1936 (Nematoda, Dorylaimida, Nordiidae)
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Peña-Santiago, Reyes, primary, Ciobanu, Marcel, additional, and Abolafia, Joaquin, additional
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- 2013
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60. Nematodes of the order Dorylaimida from Romania. The genus Enchodelus Thorne, 1939. 3. Species with rounded tail and long odontostyle
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Ciobanu, Marcel, primary, Popovici, Iuliana, additional, Guerrero, Pablo, additional, and Peña-Santiago, Reyes, additional
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- 2010
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61. Nematodes of the order Dorylaimida from Romania. The genus Enchodelus Thorne, 1939. 2. Species with rounded tail and medium-sized odontostyle
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Ciobanu, Marcel, primary, Popovici, Iuliana, additional, Peña-Santiago, Reyes, additional, and Guerrero, Pablo, additional
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- 2010
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62. Nematodes of the order Dorylaimida from Romania. The genus Enchodelus, Thorne, 1939. 1. Species with conical tail
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Popovici, Iuliana, primary, Peña-Santiago, Reyes, additional, Guerrero, Pablo, additional, and Ciobanu, Marcel, additional
- Published
- 2010
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63. Nematodes of the order Dorylaimida from Romania. The genus Thonus Thorne, 1974. Part II
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Ciobanu, Marcel, primary, Peña-Santiago, Reyes, additional, Popovici, Iuliana, additional, and Abolafia, Joaquin, additional
- Published
- 2008
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64. On the identity of Labronema plica Ciobanu, Popovici & Decraemer, 2004 and proposal for its transfer to the genus Thonus Thorne, 1974 (Nematoda: Dorylaimoidea)
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Ciobanu, Marcel, primary, Decraemer, Wilfrida, additional, Popovici, Iuliana, additional, and Peña-Santiago, Reyes, additional
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- 2008
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65. Nematodes of the order Dorylaimida from Romania. The genus Thonus Thorne, 1974. Part I
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Peña-Santiago, Reyes, primary, Abolafia, Joaquín, additional, Popovici, Iuliana, additional, and Ciobanu, Marcel, additional
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- 2007
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66. Diversity and distribution of nematode communities in grasslands from Romania in relation to vegetation and soil characteristics
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Popovici, Iuliana, primary and Ciobanu, Marcel, additional
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- 2000
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67. Nematodes of the order Dorylaimida from Romania. The genus Enchodelus, Thorne, 1939. 1. Species with conical tail.
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CIOBANU, Marcel, POPOVICI, Iuliana, GUERRERO, Pablo, and PEÑA-SANTIAGO, Reyes
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NEMATODES , *DORYLAIMIDA , *ADENOPHOREA , *SPECIES distribution - Abstract
Six species of the genus Enchodelus, one new and five known, from natural areas in Romania were studied. Enchodelus transsilvanicus sp. n. is distinguished by its 1.28-1.51 mm long body, lip region moderately angular and 12.5-13.5 μm in diam., odontostyle 29-34 μm long or 2.1-2.6 times the lip region diam., odontophore lacking distinct flanges and 41-45 μm long or 1.2-1.6 times the odontostyle, neck length 272-298 μm, pharyngeal expansion 82-113 μm long and occupying 31-39% of total neck length, female genital system amphidelphic, uterus bipartite and 3.1-3.5 times body diam. at its level, pars refringens vaginae with two distinct sclerotisations, vulva a transverse slit (V = 45-48), female tail conical and regularly ventrad curved (42-47 μm, c = 28-36, c′ = 1.3-1.5), spicules 47-50 μm long, and 6-8 spaced, ventromedian supplements. Measurements, illustrations and additional data of the remaining five species are given, namely E. arcuatus, E. brevidentatus, E. geraldi, E. morgensis and E. veletensis. An emended diagnosis of E. arcuatus is provided. Three species, E. brevidentatus, E. morgensis and E. veletensis, are reported from Romania for the first time. [ABSTRACT FROM AUTHOR]
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- 2010
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68. Nematodes of the order Dorylaimida from Romania. The genus Thonus Thorne, 1974. Part I.
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Ciobanu, Marcel, Popovici, Iuliana, Abolafia, Joaquín, and Peña-Santiago, Reyes
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DORYLAIMIDA , *CUTICLE , *SCANNING electron microscopy , *NEMATODES , *ANIMAL morphology - Abstract
Two known and two new species belonging to the genus Thonus, namely T. angulosus sp. n., T. circulifer, T. cylindricus and T. diversus sp. n., collected from several locations in Romania, are described. Thonus angulosus sp. n. is characterised by body 1.53-1.75 mm long, lip region cap-like (i.e., with its inner perioral area elevated) and 12.5 μm diam., odontostyle 13-16 μm long or slightly longer (ca 1.2 times) than lip region diam., neck 335-385 μm long, pharyngeal expansion ca two-fifths of total neck length, female genital system amphidelphic, uterus 1.1-1.7 body diam. long, pars refringens vaginae with two widely separated triangular pieces, vulva a post-equatorial (V = 54-60) longitudinal slit, glands present near the vagina-vulva junction, female tail rounded to convex conoid (30-35 μm, c= 48-56, c′ = 0.8-1.0), and males unknown. Thonus diversus sp. n. is characterised by body 1.41-1.78 mm long in females and 1.33-1.96 mm in males, lip region offset by depression or weak constriction and 15-17.5 μm diam., odontostyle 15-17 μm long and 5.5-6.8 as long as wide, neck 350-410 μm long, pharyngeal expansion occupying 40-48% of total neck length, a ring-like structure surrounding the pharyngeal base-cardia junction, uterus 1.5-3.6 body diam. long, pars refringens vaginae with two closely arranged pieces, vulva a post-equatorial (V = 54-57) transverse slit, gland cells present near the vagina-vulva junction, tail rounded-conoid to rounded (18-23 μm, c = 68-87, c′ = 0.6-0.8 in females; 18-24 μm, c = 58-89, c′ = 0.6-0.8 in males) with abundant saccate bodies and with inner cuticle layer separated from outer layer, spicules 46.5-54 μm long and 4-7 separated ventromedian supplements. Thonus cylindricus is reported for the first time in Europe and T. circulifer is new record for the Romanian nematode fauna. Descriptions, measurements, illustrations, including SEM pictures of T. diversus sp. n. and distribution data of the species are provided. [ABSTRACT FROM AUTHOR]
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- 2007
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69. NEW MORPHOMETRIC DATA AND GEOGRAPHICAL DISTRIBUTION OF CRICONEMATID SPECIES (NEMATODA: CRICONEMATIDAE) IN ROMANIA.
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POPOVICI, IULIANA and CIOBANU, MARCEL
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- 2000
70. Earthworm invasion causes declines across soil fauna size classes and biodiversity facets in northern North American forests
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Jochum, Malte, Ferlian, Olga, Thakur, Madhav P., Ciobanu, Marcel, Klarner, Bernhard, Salamon, Jörg-Alfred, Frelich, Lee E., Johnson, Edward A., and Eisenhauer, Nico
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2. Zero hunger ,570 Life sciences ,biology ,15. Life on land
71. Sustainable Land Use Strengthens Microbial and Herbivore Controls in Soil Food Webs in Current and Future Climates.
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Sünnemann M, Barnes AD, Amyntas A, Ciobanu M, Jochum M, Lochner A, Potapov AM, Reitz T, Rosenbaum B, Schädler M, Zeuner A, and Eisenhauer N
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- Animals, Soil Microbiology, Grassland, Nematoda physiology, Arthropods physiology, Conservation of Natural Resources, Biodiversity, Food Chain, Climate Change, Herbivory, Soil chemistry, Agriculture methods
- Abstract
Climate change and land-use intensification are threatening soil communities and ecosystem functions. Understanding the combined effects of climate change and land use is crucial for predicting future impacts on soil biodiversity and ecosystem functioning in agroecosystems. Here, we used a field experiment to quantify the combined effects of climate change (warming and altered precipitation patterns) and land use (agricultural type and management intensity) on soil food webs across nematodes, micro-, and macroarthropods. Specifically, we investigated two types of agricultural systems-croplands and grasslands-under both high- and low-intensity management. We focused on assessing the functioning of soil food webs by investigating changes in energy flux to consumers in the main trophic groups: decomposers, microbivores, herbivores, and predators. While the total energy flux and detritivory, herbivory and predation in the soil food web remained unchanged across treatments, low-intensity land use-compared to high intensity-led to higher microbivory and microbial control under future climate conditions (i.e., warming and summer drought) in croplands and grasslands. At the same time, microbial and herbivore control were higher under low-intensity land use in croplands and grasslands. Overall, our results underscore the potential benefits of less intensive, more sustainable management practices for soil food-web functioning under current and future climate scenarios., (Global Change Biology© 2024 The Author(s). Global Change Biology published by John Wiley & Sons Ltd.)
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- 2024
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72. On the Identity of the Genus CrassolabiumYeates, 1967 (Dorylaimida: Qudsianematidae).
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Peña-Santiago R and Ciobanu M
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The identity and taxonomy of the genus Crassolabium are discussed based on examination of material of C. australe, its type species and its comparison with Iberian species of close genera. The existence of refractive masses (thickenings) at the inner core of lateral lips, the most distinctive diagnostic feature of Crassolabium, is considered to be of minor taxonomical significance because of its interspecific and even intraspecific variability. It is concluded that Crassolabium and Thonus are identical, and a reversal of precedence among both genera is suggested. Crassolabium australe is re-described, and some comments are provided on C. robustum, the second species in the genus.
- Published
- 2007
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