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Publications (82)
Soil nematodes are one of the most important terrestrial faunal groups in Antarctica, as they are a major component of soil micro-food webs. Despite their crucial role in soil processes, knowledge of their species diversity and distribution is still incomplete. Taxonomic studies of Antarctic nematodes are fragmented, which prevents assessment of th...
The honey bee is associated with a diverse community of microbes (viruses, bacteria, fungi, and protists), commonly known as the microbiome. Here, we present data on honey bee microbiota from two localities having different surrounding landscapes - mountain (the Rhodope Mountains) and lowland (the Danube plain). The bacterial communities of abdomen...
Genus Longidorus Micoletzky, 1922 comprises ectoparasitic nematode species feeding on plant roots. Some of them have considerable economic importance directly as plant pests or indirectly as vectors of nepo-viruses. During an extensive study on longidorids in Romania Longidorus distinctus Lamberti, Choleva and Agostinelli, 1983 was recovered from v...
The analysis of the functional diversity of soil nematodes requires detailed knowledge on theoretical aspects of the biodiversity–ecosystem functioning relationship in natural and managed terrestrial ecosystems. Basic approaches applied are reviewed, focusing on the impact and value of soil nematode diversity in crop production and on the most cons...
The aim of our study was to compare NDVI index, total nitrogen, chlorophyll and carotenoids content of leaves of oil-bearing roses cultivated under organic and conventional agricultural systems in order to find impact of farm management on the physiology status of Rosa damascena leaves. The experiment was conducted on six private arable areas with...
This report presents the results of the mapping and assessment of soil biodiversity and its functions in cropland dominated landscapes in Bulgaria. We summarize the motivation for the assessment, highlighting the importance of assessing biodiversity-mediated processes in the soil, to complement soil condition indicators based on physical and chemic...
Identifying patterns in roots spatial distribution and dynamics, and quantifying the root stocks, annual production and turnover rates at species level is essential for understanding plant ecological responses to local environmental factors and climate change. We studied selected root traits in four different stands, two European beech (Fagus sylva...
Soil fungi are key component of soil biota having an important role in many ecological processes. As pathogens, decomposers and plant mutualists they can affect plant and soil health in agro-ecosystems significantly. The impact of crop management practices on soil fungal communities is diverse and still poorly studied. The lack of knowledge is main...
The genus Coomansus Jairajpuri & Khan, 1977 encompasses more than 30 species occuring in various habitats. The Coomansuszschokkei -group, characterized by a posterior position of the dorsal tooth, includes 11 species spread in the northern hemisphere: Europe (3 species), Asia (Far East, Korea, Japan – 8 species), North America (Costa Rica and USA –...
The riparian zones represent habitats of high and specific biodiversity; however, historically they have been subject to intensive exploitation and most of them are drastically changed. Predatory nematodes are widespread terrestrial organisms and play an important role in biological regulation of litter/soil communities. Some preliminary results on...
Nematodes represent one of the largest phyla in the animal kingdom and are a key component of the soil microfauna (organisms with body width <0.2 mm). Being a widespread and diverse group, they display a wide range of adaptations and lifestyle traits. Their functional role in soil food-webs is mostly related to their feeding type. The majority of t...
The genus Aporcelinus Andrássy, 2009 was erected to accommodate species with characteristic cuticle and other aporcelaimid features such as the lip region, odontostyle and guiding apparatus structure, which have been previously described under Allodorylaimus/Eudorylaimus . In respect to the cuticle structure, the genus is similar to only two other...
Longidorus polyae sp. n., a bisexual nematode species found in the rhizosphere of pear tree (Pyrus communis L.), is described and characterised using an integrative approach. The new species has a female body length of 6.8-9.1 mm; a comparatively long odontostyle (114.0-127.5 μm); a narrow lip region (14.0-15.5 μm), anteriorly flattened and almost...
Xiphinema americanum group has a cosmopolitan distribution, with several species having particular importance as virus-vectors of four economically important nepoviruses naturally occurring in the USA with IAI quarantine status for Europe. The morphological diagnosis of the species is problematic due to the limited diagnostic characters, overlappin...
Longidoruschenisp. n ., an amphimictic species recovered from the rhizosphere of Larixprincipis-rupprechtii and Pyracanthafortuneana in Shanxi and Beijing, China, is described and illustrated. The taxonomic position of L.chenisp. n. among other species within the genus was elucidated using morphometric and molecular data, and phylogenetic relations...
The taxonomic position of the endemic Antarctic species Enchodeloides signyensis (Loof, 1975), gen. n., comb. n. (= Enchodelus signyensis Loof, 1975) is discussed on the basis of morphological study, including SEM, morphometric data, postembryonic observations, and sequence data of 18S rDNA and the D2-D3 expansion fragments of the large subunit rDN...
Longidorus piceicola, a new geographical and host record from Romania, was described and illustrated on the basis of two populations originating from a coniferous and a deciduous forest. The main morphological characters of specimens from Romania correspond very well with the type material collected from the soil around Picea abies L. (Slovakia) ex...
Longidorus hangzhouensis was redescribed from a population recovered from the rhizosphere of tea (Camellia sinensis L.) cultivated in Longjing Village, Hangzhou, Zhejiang Province, Eastern China, which is the type locality area of the species. It is characterized by a medium body size (3.2-3.9 mm), narrow lip region (8.1-10.5 µm), long odontostyle...
Trichodorus similis associated with potato in the Czech Republic was described and illustrated. This study provides additional information on morphometrical and morphological characters of T. similis and integrates morphological and genetic data obtained by species-specific polymerase chain reaction and sequencing (ITS1 and D2-D3 expansion segments...
There is a significant knowledge gap with regard to non-filarial nematodes and their relationships, if any, with intracellular bacteria, with only sporadic reports in the literature. An intracellular bacteria Xiphinematobacter, belonging to subdivision 2 of the Verrucomicrobia, was previously reported in the ovaries of three species of the non-fila...
Using ribosomal (18S, ITS1, ITS2, D2-D3 expansion segments of 28S rDNA) and mitochondrial (partial cox1 and nad4) DNA markers in a study of several populations of Xiphinema americanum-group from Europe and Morocco, two cryptic species Xiphinema browni sp. n. (formerly reported as Xiphinema pachtaicum) and Xiphinema penevi sp. n. were revealed. The...
The taxonomic position of two antarctic dorylaimid species Amblydorylaimus isokaryon (Loof, 1975) Andrássy,
1998 and Pararhyssocolpus paradoxus (Loof, 1975), gen. n., comb. n. are discussed on the basis of morphological, including SEM study, morphometric, postembryonic and sequence data of 18S rDNA and the D2-D3 expansion fragments of large subunit...
Longidorus euonymus Mali et Hooper, 1974 from three localities in Romania is described and illustrated on the basis of adult and juvenile specimens. This species was recovered in association with barley, strawberry, blackberry, cherry, sour cherry, plum and represents a new geographical record for Romanian longidorid fauna.
An unknown species belonging to the genusCalcaridorylaimus Andrássy, 1986 was collected from the litter of broadleaf forests dominated by Castanea sativa Mill. and mixed with Quercus daleshampii Ten. and Fagus sylvatica L. on Belasitsa Mountain, south-western Bulgaria. Calcaridorylaimus castaneae
sp. n. is characterised by its long body (1.4–2.1 mm...
Severe chlorotic mottling, yellow chlorotic spots and
patches were observed on a red raspberry plantation near
Smolyan (south Bulgaria). Many patches of dead plants suggested
that a nematode-transmitted virus could be associated
with the disease. Soil samples were taken for nematode
search and leaves for virus detection. Xiphinema diversicaudatum
(...
Heterodorus magnificus Altherr, 1952 and H. arcuatus (Thorne, 1939) Andráss y, 2009 from High Arctic
were described and illustrated. Heterodorus magnificus, considered as a junior synonym of H. arcuatus
by Andráss y (2009), is re-validated and an amended diagnosis is proposed; the species is recorded for the
first time from a nival desert of Taymyr...
AbstractA description is provided of Longidorus cholevae
sp. n., a bisexual species associated with wild cherry (Prunus avium L.) from the Rila Mountains, Bulgaria. The position of L. cholevae sp. n. among other species of the genus was elucidated by using morphological and molecular data. Phylogenetic analyses were performed of D2-D3 expansion dom...
List of the species of the genus Longidorus (doi: 10.3897/zookeys.330.5750.app1) File format: Microsoft Word Document (doc).
A partial polytomous key to the species of Longidorus (doi: 10.3897/zookeys.330.5750.app2) File format: Microsoft Word Document (doc).
Additional data on the occurrence and distribution of Xiphinema non-americanum group species in Romania are provided. Xiphinema diversicaudatum, X. index, X. vuittenezi and X. italiae were recovered from vineyards and cherry fruit trees; adults and juvenile stages were described and analysed and the morphology/variability discussed. Multiplex PCR d...
A population of Xiphinema macroacanthum Lamberti, Roca & Agostinelli, 1989 originating from olive orchards in Brindisi, Italy and containing both adults and all juvenile stages, is described and illustrated. The first juvenile stage is reported for the first time. Molecular characterisation of this species, using the D2–D3 expansion domains of the...
A population of Xiphinema macroacanthum Lamberti, Roca & Agostinelli, 1989 originating from olive orchards in Brindisi, Italy and containing both adults and all juvenile stages, is described and illustrated. The first juvenile stage is reported for the first time. Molecular characterisation of this species, using the D2-D3 expansion domains of the...
Several populations of Xiphinema pachtaicum (Tulaganov, 1938) Kirjanova, 1951 and Xiphinema simile Lamberti, Choleva et Agostinelli, 1983, originating from various localities have been studied during 2011-2012. Soil samples were collected at a depth of 20-40 cm in the rhizosphere of grapevine, cherry and apple trees. The identification of the nemat...
Two nematode species of the genus Enchodelus Thorne, 1939, one new and one known from Arctic polar deserts were studied. Enchodelus makarovae
sp. n. is an amphimictic species, characterised by females with body length of 1.57–2.00 mm, lip region 15–17.5 µm wide, amphid duplex, odontostyle 38–43 µm long or 2.3–2.8 times lip region diam. Odontophore...
Data on the distribution of Longidoridae and nepoviruses in Bulgaria and Slovenia are summarized. Six species of Longidorus (L. apulus, L. attenuatus, L. arthensis, L. fas-ciatus, L. elongatus, L. macrosoma), one Paralongidorus species (P. maximus) and three Xiphinema species (X. diversicaudatum, X. index, X. rivesi) are known as natural vectors of...
Nematodes of the genus Xiphinema (family Longidoridae) are economically important plant pests, some of them known as vectors of nepo-viruses [13]. Accurate identification of Xiphinema spp. is important in regard to their virus transmission capability. Nine species of the genus Xiphinema are reported so far from Romania. New information on the morph...
A new needle nematode, Longidorus carniolensis sp. n., recovered from the soil around the roots of grapevine Vitis vinifera L. from Slovenia, is described and illustrated. Longidorus carniolensis is an amphimictic species, characterised by females with a moderately long (L=5.6-8.2 mm) and plump (a=51-72.4, ave. 66.3) body, assuming a spiral to C-sh...
Soil represents one of the most diverse habitats on earth, however relatively little attention has been paid for protecting soil-dwelling biota due to its lower visibility and especially the lack of 'charismatic' species. Soil organisms are involved in various ecosystem functions that provide essential services to human society. Among the key ecosy...
The literature data on the plant nematode fauna of the Rhodope Mountains are summarized and new information on the distribution of nematode species is provided. One hundred and fifty five species and 103 genera are reported to occur in the study region which represents about ¼ of the Bulgarian plant nematode fauna. Twenty six species are new record...
The structural and functional diversity of nematode communities from Pinus mugo sites in Pirin Mountain was assessed. The sampling plots represent different levels of disturbance — next to and outside
ski runs. Nematode assemblages from this habitat can be characterised with high diversity (in total, 104 taxa and richness
ranging from 41 to 65 gene...
The structural and functional parameters of nematode assemblages from Deschampsia microhabitats of polar deserts in the Arctic and Antarctic, as well as from nival moun-tainous habitats in the southern Taymyr Peninsula, Siberia, were compared. Common features of all communities were: low taxonomic richness, with antarctic microhabitats being genera...
Th e structural and functional parameters of nematode assemblages from Deschampsia microhabitats of polar deserts in the Arctic and Antarctic, as well as from nival moun-tainous habitats in the southern Taymyr Peninsula, Siberia, were compared. Common features of all communities were: low taxonomic richness, with antarctic microhabitats being gener...
Th e structural and functional parameters of nematode assemblages from Deschampsia microhabitats of polar deserts in the Arctic and Antarctic, as well as from nival moun-tainous habitats in the southern Taymyr Peninsula, Siberia, were compared. Common features of all communities were: low taxonomic richness, with antarctic microhabitats being gener...
A description of Longidorus holovachovi n. sp., originating from a beech forest, Carpathian Mountains, Ukraine is provided. Longidorus holovachovi n. sp. is a parthenogenetic species with a medium body size (4.3-5.2 mm), long odontostyle (122-134 µm), narrow, anteriorly rounded and slightly expanded head region (11.5-13 µm), pocket shaped distinctl...
Several populations of Xiphinema simile Lamberti, Choleva & Agostinelli, 1983 and two of X. parasimile Barsi & Lamberti, 2004, originating from various habitats – natural and man-made, have been studied. Xiphinema simile was associated both with cultivated and naturally growing plants, while X. parasimile was recovered from soil around grapevine. D...
A description of Xipinema pirinense n. sp. is provided. This is a parthenogenetic nematode found associated with Fragaria sp. and Alchemilla sp. (Rosaceae) close to pine trees in the Pirin Mountains, Bulgaria. The species is characterised by its medium body length (3.2-3.9 mm), rounded head region slightly demarcated by a shallow depression, long o...
The structural and functional biodiversity of nematode communities of Pinus peuce forest fragments in the Northern Pirin Mountain was assessed. The average relative abundance of nematode assemblages varied from 176 - 1136 specimens. A total of 58 genera were identified. The generic richness was similarin the sites studied (av. 16-18 genera). Furthe...
The 18S ribosomal DNA (rDNA) and cytochrome oxidase I region of mitochondrial DNA (mtDNA) were sequenced for 24 Xiphinema americanum-group populations sourced from a number of geographically disparate locations. Sequences were subjected to phylogenetic analysis and compared. 18S rDNA strongly suggested that only X. pachtaicum, X. simile (two popula...
Variability in the spatial distribution of nematode communities in relation to the structural heterogeneity of the environment was studied in nine different microhabitats within a relatively small area of a natural oak forest in Bulgaria. Maturity and diversity indices, trophic structure and the distribution of colonizer-persister groups were appli...
Data on the morphology and morphometrics of females from different populations of Enchodelus signyensis from Livingston Island, Antarctic are presented. The male, described here for the first time, is characterised by 2-4 spaced ventro-median supplements preceded by an adanal pair. Information on the distribution and plant associations of the speci...
One new and three known species of the genus Paravulvus Heyns, 1968 from forests in Bulgaria are described and illustrated. Paravulvus rhodopensis sp. n. is a bisexual species characterised by a relatively thick cuticle with fine transverse striation, head region offset by a depression, mural tooth deltoid 6-7 mum long. presence of paravulvae poste...
Species and generic composition, trophic structure and some ecological parameters of nematode assemblages from the moss, Hypnum cupressiforme Hedw, in a durmast oak (Quercus dalechampii Ten.) forest were studied on three substrates (soil, stone and tree trunks). Nematode abundance was very variable between samples and substrates. Nematode assemblag...
During an investigation of nematode diversity in Bulgarian woodlands, four species of Tripyla (T. affinis, T. filicaudata, T. infia and T. setifera) were detected in soils associated with different trees: pine, spruce, beech and oak. Morphological data are provided for the four Tripyla species. Tripyla infia was a new geographic record for Bulgaria...
