Oribatida

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Sergey G. Ermilov - One of the best experts on this subject based on the ideXlab platform.

Anna Seniczak - One of the best experts on this subject based on the ideXlab platform.

  • Diversity of oribatid mites (Acari: Oribatida) in the Svalbard archipelago: a historical overview
    Zootaxa, 2020
    Co-Authors: Anna Seniczak, Stanisław Seniczak
    Abstract:

    Studies on Oribatida from Svalbard have nearly a 150-year long history. This paper reviews species diversity of Oribatida in Svalbard from a historical aspect, summarizes how often species have been found and detects erroneous reports. A list of 93 oribatid species (including Astigmata) from the Svalbard archipelago is presented. The species represent 30 families, of which Brachychthoniidae (14 spp.) and Crotoniidae (12 spp.) are particularly species-rich. The most often occurring oribatid species is Diapterobates notatus (Thorell, 1871), mentioned in 50% of publications, followed by Ameronothrus lineatus (Thorell, 1871) and Hermannia reticulata Thorell, 1871, mentioned in 30% papers each. About one third of the species have been found in Svalbard only once, and half of them (i.e. 15 species) were reported only in the last century, including five very old records. Acarological studies in Svalbard are heavily biased since they have concentrated on the island of Spitsbergen with limited sampling of other islands / island groups: for example, Barentsoya, Bjornoya, Danskoya, Edgeoya, Hopen, Lagoya, Kong Karls Land, Prins Karls Forland and Sofiaoya.

  • Diverse Mite Communities (Acari: Oribatida, Mesostigmata) from a Broadleaf Forest in Western Norway
    Annales Zoologici Fennici, 2019
    Co-Authors: Anna Seniczak, Stanisław Seniczak, Thomas Bolger, Steffen Roth, Per Djursvoll, Bjarte H. Jordal
    Abstract:

    Broadleaf forests are rare in Norway and they are considered one of the most biodiverse terrestrial habitats in Fennoscandia. These forests are poorly studied in terms of their acarofauna. Mites of two groups, Oribatida and Mesostigmata, were studied in a broadleaf forest in western Norway. In total, 6350 oribatid mites, representing 67 species (i.e., 25% of the known Norwegian species) and 559 mesostigmatid mites representing 22 species (9% of the species recorded from Norway) were collected. The mean densities of Oribatida and Mesostigmata were 454 and 40 individuals per 0.5 dm3, respectively. The most abundant member of Oribatida was Oribatula exilis (29% of Oribatida collected), while Zercon lindrothi made up 59% of Mesostigmata. Fifteen of the oribatid species were first records for Norway, including six new to Fennoscandia: Phthiracarus compressus, Suctobelbella arcana, S. hammerae, S. prominens, Campachipteria patavina and Liebstadia longior.

  • Diverse Sphagnum Mosses Support Rich Moss Mite Communities (Acari, Oribatida) in Mires of Western Norway
    Wetlands, 2019
    Co-Authors: Anna Seniczak, Stanisław Seniczak, J. Carlos Iturrondobeitia, Torstein Solhøy, Kjell Ivar Flatberg
    Abstract:

    A study of oribatid mites was carried out in six mires located in western, oceanic parts of Norway. Twenty Sphagnum species of five subgenera were collected from microhabitats representing trophic state and wetness gradients. In total, over 60,000 mites were extracted, including 58,000 Oribatida, representing 95 species (i.e. 30% of total species diversity of Oribatida in Norway). This is the highest number ever reported from mires, including 18 species new to Norway. The average density of the Oribatida was 54,126 ind./m^2, but it differed among Sphagnum subgenera, being four times lower in the subgenus Rigida than in the other subgenera. Juveniles contributed nearly 40% of oribatids, in some species highly dominating in the age structure (up to 80% in Nothrus spp.), and two oribatid species were represented only by juveniles, so their inclusion is important in ecological studies. In some species the proportion of juveniles varied between the studied microhabitats. Localities, Sphagnum subgenera, and wetness gradient affected significantly the oribatid communities, so these factors should be taken into consideration in studies of the Oribatida in mires.

  • Seasonal Dynamics of Oribatid Mites (Acari, Oribatida) in a Bog in Poland
    Wetlands, 2019
    Co-Authors: Anna Seniczak, Stanisław Seniczak, Radomir Graczyk, Barbara Waldon-rudzionek, Anna Nowicka, Sylwiusz Pacek
    Abstract:

    The Oribatida is the most abundant and diverse group of mites and one of the most abundant groups of invertebrates in bogs, important for the decomposition of organic matter. These mites are relatively poorly studied in bogs and their seasonal dynamics have never been investigated in detail throughout the year. The study was performed on the periphery of a bog pond located in north-eastern Poland during four seasons. The analyses were based on 25,128 mites comprising 24,393 Oribatida from 66 species. The second most abundant group was Prostigmata, followed by Mesostigmata. The density of mites and of Oribatida reached a maximum in autumn (ca. 90,000 individuals/m2), and was nearly two-fold greater than in other seasons. In autumn, spring and summer the oribatid communities were dominated by the aquatic genus Limnozetes, while in winter these mites were replaced by species with lower water demands (e.g. Liochthonius alpestris, Mainothrus badius, Scheloribates laevigatus) or eurytopic ones (e.g. Oppiella nova). Oribatida reproduced in all seasons with the greatest proportion of juveniles (25%) observed in winter. Two species, Liacarus acutus and Dissorhina ornata peloponnesiaca are reported for the first time for the Polish fauna; both were found only in one season showing that sampling throughout the year is important to determine biodiversity.

  • Oribatid mites of conventional and organic vineyards in the Valencian Community, Spain
    Acarologia, 2018
    Co-Authors: Anna Seniczak, Stanisław Seniczak, Ivan García-parra, Francisco Ferragut, Pilar Xamaní, Radomir Graczyk, Enric Messeguer, Rafael Laborda, Eugenia Rodrigo
    Abstract:

    In this study the oribatid mite communities of conventional and organic vineyards in theValencian Community (Spain) were compared. The soil samples were collected in El Poble Nou de Benitatxell in autumn 2014 and spring 2015 from four sites, treated as replicates, each including a conventional vineyard, an organic vineyard, and a control (natural habitat, i.e. in plots 1-3 an abandoned vineyard, in plot 4 an area never used in agriculture). Two parallel samples were collected in each vineyard from a zone between vine rows, driven by a tractor (Tr), a zone between vines (Vi), the border of the vineyard (Bo) and from a control, making a total of 112 samples. In total 3,225 oribatid mites were obtained represented by 59 species. No differences were found in density of Oribatida between the conventional, organic vineyards and the control, but the species diversity was higher in the control than in the vineyards. In the vineyards the density and species number of the oribatid mites were highest between vines (the average from all vineyards and both seasons was 4,400 individuals per 1 m2, 15 species), followed by the border of the vineyards (2,800 individuals per 1 m2, 14 species) and were lowest between vine rows (400 individuals per 1 m2, 6 species). The species diversity of Oribatida was higher in autumn than in spring, while the density followed this pattern only in the vineyards, but not in the control. In the vineyards Oribatula excavata dominated (D = 25), followed by Minunthozetes quadriareatus and Passalozetes africanus (D = 18 and 14, respectively), while in the control these species were not abundant. In the control the most abundant species was Oppiella subpectinata (D = 28), followed by Eremulus flagellifer (D = 20). Podoribates longipes and Steganacarus boulfekhari are reported for the first time in Spain. To conclude, the oribatid mites did not benefit from the organic cultivation of the vineyards, probably because they are tolerant to herbicides used in the conventional systems but sensitive to mechanical cultivation of soil, which was even more intense in organic vineyards than in the conventional ones.

Mark A Minor - One of the best experts on this subject based on the ideXlab platform.

  • New Pseudotocepheus (Acari, Oribatida, Otocepheidae) from New Zealand, with a key to known species of the genus from the Australian region
    International Journal of Acarology, 2019
    Co-Authors: Sergey G. Ermilov, Mark A Minor
    Abstract:

    ABSTRACTTwo new species of oribatid mites of the genus Pseudotocepheus (Oribatida, Otocepheidae) are described from litter and soil in New Zealand. Pseudotocepheus whanganuiensis sp. nov. differs f...

  • hydrology driven environmental variability determines abiotic characteristics and Oribatida diversity patterns in a sphagnum peatland system
    Experimental and Applied Acarology, 2019
    Co-Authors: Mark A Minor, Sergey G. Ermilov, а D Philippov
    Abstract:

    : We investigated oribatid mite communities in a Sphagnum-dominated boreal peatland system characterised by a mosaic of oligotrophic and meso-eutrophic areas. We aimed to determine the relative importance of environmental factors (pH, Sphagnum nutrient content, water table level, diversity of vascular plants and bryophytes in the surrounding plant community) and spatial variation in influencing abundance, diversity and community composition of aquatic and terrestrial oribatid mites. Among environmental variables, water table level (micro-topography), pH, and K in Sphagnum tissues were the main predictors of Oribatida community structure. Aquatic species were associated with pools; two terrestrial species-Hoplophthiracarus illinoisensis and Nothrus pratensis-were associated with oligotrophic hummocks; the rest of terrestrial species were associated with dryer mesotrophic and eutrophic habitats. Low water table depth (hummocks), high local plant diversity, and high P in Sphagnum tissues were predictors of high abundance of terrestrial Oribatida. Species richness of terrestrial Oribatida was linked with low water table and high plant diversity. For aquatic Oribatida abundance, water table depth was the single most important predictor variable. Plot trophic class (its status on the peatland poor-rich gradient assigned based on plant indicator species) was also a significant predictor of terrestrial Oribatida abundance, richness, and community structure. Spatial structuring was important for terrestrial Oribatida community composition, weak (P < 0.10) for terrestrial Oribatida abundance and richness, and not significant for aquatic Oribatida.

  • Hydrology-driven environmental variability determines abiotic characteristics and Oribatida diversity patterns in a Sphagnum peatland system
    Experimental and Applied Acarology, 2019
    Co-Authors: Mark A Minor, Sergey G. Ermilov, D. А. Philippov
    Abstract:

    We investigated oribatid mite communities in a Sphagnum -dominated boreal peatland system characterised by a mosaic of oligotrophic and meso-eutrophic areas. We aimed to determine the relative importance of environmental factors (pH, Sphagnum nutrient content, water table level, diversity of vascular plants and bryophytes in the surrounding plant community) and spatial variation in influencing abundance, diversity and community composition of aquatic and terrestrial oribatid mites. Among environmental variables, water table level (micro-topography), pH, and K in Sphagnum tissues were the main predictors of Oribatida community structure. Aquatic species were associated with pools; two terrestrial species— Hoplophthiracarus illinoisensis and Nothrus pratensis —were associated with oligotrophic hummocks; the rest of terrestrial species were associated with dryer mesotrophic and eutrophic habitats. Low water table depth (hummocks), high local plant diversity, and high P in Sphagnum tissues were predictors of high abundance of terrestrial Oribatida. Species richness of terrestrial Oribatida was linked with low water table and high plant diversity. For aquatic Oribatida abundance, water table depth was the single most important predictor variable. Plot trophic class (its status on the peatland poor-rich gradient assigned based on plant indicator species) was also a significant predictor of terrestrial Oribatida abundance, richness, and community structure. Spatial structuring was important for terrestrial Oribatida community composition, weak ( P  

  • Relative importance of local habitat complexity and regional factors for assemblages of oribatid mites (Acari: Oribatida) in Sphagnum peat bogs
    Experimental and Applied Acarology, 2016
    Co-Authors: Mark A Minor, D. А. Philippov, S. G. Ermilov, A. A. Prokin
    Abstract:

    We investigated communities of oribatid mites in five peat bogs in the north-west of the East European plain. We aimed to determine the extent to which geographic factors (latitude, separation distance), local environment ( Sphagnum moss species, ground water level, biogeochemistry) and local habitat complexity (diversity of vascular plants and bryophytes in the surrounding plant community) influence diversity and community composition of Oribatida. There was a significant north-to-south increase in Oribatida abundance. In the variance partitioning, spatial factors explained 33.1 % of variability in abundance across samples; none of the environmental factors were significant. Across all bogs, Oribatida species richness and community composition were similar in Sphagnum rubellum and Sphagnum magellanicum , but significantly different and less diverse in Sphagnum cuspidatum . Sphagnum microhabitat explained 52.2 % of variability in Oribatida species richness, whereas spatial variables explained only 8.7 %. There was no distance decay in community similarity between bogs with increased geographical distance. The environmental variables explained 34.9 % of the variance in community structure, with vascular plants diversity, bryophytes diversity, and ground water level all contributing significantly; spatial variables explained 15.1 % of the total variance. Overall, only 50 % of the Oribatida community variance was explained by the spatial structure and environmental variables. We discuss relative importance of spatial and local environmental factors, and make general inferences about the formation of fauna in Sphagnum bogs.

  • the oribatid mite genus macrogena acari Oribatida ceratozetidae with description of two new species from new zealand
    ZooKeys, 2015
    Co-Authors: Sergey G. Ermilov, Mark A Minor
    Abstract:

    Two new species of oribatid mites of the genus Macrogena (Oribatida, Ceratozetidae) are described from alpine soils of the South Island of New Zealand. Macrogena brevisensilla sp. n. and Macrogena abbreviata sp. n. differ from all species of this genus by the tridactylous legs and by the comparatively short interlamellar setae, respectively. New generic diagnosis and an identification key to the known species of Macrogena are provided.

Stanisław Seniczak - One of the best experts on this subject based on the ideXlab platform.

  • Diversity of oribatid mites (Acari: Oribatida) in the Svalbard archipelago: a historical overview
    Zootaxa, 2020
    Co-Authors: Anna Seniczak, Stanisław Seniczak
    Abstract:

    Studies on Oribatida from Svalbard have nearly a 150-year long history. This paper reviews species diversity of Oribatida in Svalbard from a historical aspect, summarizes how often species have been found and detects erroneous reports. A list of 93 oribatid species (including Astigmata) from the Svalbard archipelago is presented. The species represent 30 families, of which Brachychthoniidae (14 spp.) and Crotoniidae (12 spp.) are particularly species-rich. The most often occurring oribatid species is Diapterobates notatus (Thorell, 1871), mentioned in 50% of publications, followed by Ameronothrus lineatus (Thorell, 1871) and Hermannia reticulata Thorell, 1871, mentioned in 30% papers each. About one third of the species have been found in Svalbard only once, and half of them (i.e. 15 species) were reported only in the last century, including five very old records. Acarological studies in Svalbard are heavily biased since they have concentrated on the island of Spitsbergen with limited sampling of other islands / island groups: for example, Barentsoya, Bjornoya, Danskoya, Edgeoya, Hopen, Lagoya, Kong Karls Land, Prins Karls Forland and Sofiaoya.

  • Diverse Mite Communities (Acari: Oribatida, Mesostigmata) from a Broadleaf Forest in Western Norway
    Annales Zoologici Fennici, 2019
    Co-Authors: Anna Seniczak, Stanisław Seniczak, Thomas Bolger, Steffen Roth, Per Djursvoll, Bjarte H. Jordal
    Abstract:

    Broadleaf forests are rare in Norway and they are considered one of the most biodiverse terrestrial habitats in Fennoscandia. These forests are poorly studied in terms of their acarofauna. Mites of two groups, Oribatida and Mesostigmata, were studied in a broadleaf forest in western Norway. In total, 6350 oribatid mites, representing 67 species (i.e., 25% of the known Norwegian species) and 559 mesostigmatid mites representing 22 species (9% of the species recorded from Norway) were collected. The mean densities of Oribatida and Mesostigmata were 454 and 40 individuals per 0.5 dm3, respectively. The most abundant member of Oribatida was Oribatula exilis (29% of Oribatida collected), while Zercon lindrothi made up 59% of Mesostigmata. Fifteen of the oribatid species were first records for Norway, including six new to Fennoscandia: Phthiracarus compressus, Suctobelbella arcana, S. hammerae, S. prominens, Campachipteria patavina and Liebstadia longior.

  • Diverse Sphagnum Mosses Support Rich Moss Mite Communities (Acari, Oribatida) in Mires of Western Norway
    Wetlands, 2019
    Co-Authors: Anna Seniczak, Stanisław Seniczak, J. Carlos Iturrondobeitia, Torstein Solhøy, Kjell Ivar Flatberg
    Abstract:

    A study of oribatid mites was carried out in six mires located in western, oceanic parts of Norway. Twenty Sphagnum species of five subgenera were collected from microhabitats representing trophic state and wetness gradients. In total, over 60,000 mites were extracted, including 58,000 Oribatida, representing 95 species (i.e. 30% of total species diversity of Oribatida in Norway). This is the highest number ever reported from mires, including 18 species new to Norway. The average density of the Oribatida was 54,126 ind./m^2, but it differed among Sphagnum subgenera, being four times lower in the subgenus Rigida than in the other subgenera. Juveniles contributed nearly 40% of oribatids, in some species highly dominating in the age structure (up to 80% in Nothrus spp.), and two oribatid species were represented only by juveniles, so their inclusion is important in ecological studies. In some species the proportion of juveniles varied between the studied microhabitats. Localities, Sphagnum subgenera, and wetness gradient affected significantly the oribatid communities, so these factors should be taken into consideration in studies of the Oribatida in mires.

  • Seasonal Dynamics of Oribatid Mites (Acari, Oribatida) in a Bog in Poland
    Wetlands, 2019
    Co-Authors: Anna Seniczak, Stanisław Seniczak, Radomir Graczyk, Barbara Waldon-rudzionek, Anna Nowicka, Sylwiusz Pacek
    Abstract:

    The Oribatida is the most abundant and diverse group of mites and one of the most abundant groups of invertebrates in bogs, important for the decomposition of organic matter. These mites are relatively poorly studied in bogs and their seasonal dynamics have never been investigated in detail throughout the year. The study was performed on the periphery of a bog pond located in north-eastern Poland during four seasons. The analyses were based on 25,128 mites comprising 24,393 Oribatida from 66 species. The second most abundant group was Prostigmata, followed by Mesostigmata. The density of mites and of Oribatida reached a maximum in autumn (ca. 90,000 individuals/m2), and was nearly two-fold greater than in other seasons. In autumn, spring and summer the oribatid communities were dominated by the aquatic genus Limnozetes, while in winter these mites were replaced by species with lower water demands (e.g. Liochthonius alpestris, Mainothrus badius, Scheloribates laevigatus) or eurytopic ones (e.g. Oppiella nova). Oribatida reproduced in all seasons with the greatest proportion of juveniles (25%) observed in winter. Two species, Liacarus acutus and Dissorhina ornata peloponnesiaca are reported for the first time for the Polish fauna; both were found only in one season showing that sampling throughout the year is important to determine biodiversity.

  • Oribatid mites of conventional and organic vineyards in the Valencian Community, Spain
    Acarologia, 2018
    Co-Authors: Anna Seniczak, Stanisław Seniczak, Ivan García-parra, Francisco Ferragut, Pilar Xamaní, Radomir Graczyk, Enric Messeguer, Rafael Laborda, Eugenia Rodrigo
    Abstract:

    In this study the oribatid mite communities of conventional and organic vineyards in theValencian Community (Spain) were compared. The soil samples were collected in El Poble Nou de Benitatxell in autumn 2014 and spring 2015 from four sites, treated as replicates, each including a conventional vineyard, an organic vineyard, and a control (natural habitat, i.e. in plots 1-3 an abandoned vineyard, in plot 4 an area never used in agriculture). Two parallel samples were collected in each vineyard from a zone between vine rows, driven by a tractor (Tr), a zone between vines (Vi), the border of the vineyard (Bo) and from a control, making a total of 112 samples. In total 3,225 oribatid mites were obtained represented by 59 species. No differences were found in density of Oribatida between the conventional, organic vineyards and the control, but the species diversity was higher in the control than in the vineyards. In the vineyards the density and species number of the oribatid mites were highest between vines (the average from all vineyards and both seasons was 4,400 individuals per 1 m2, 15 species), followed by the border of the vineyards (2,800 individuals per 1 m2, 14 species) and were lowest between vine rows (400 individuals per 1 m2, 6 species). The species diversity of Oribatida was higher in autumn than in spring, while the density followed this pattern only in the vineyards, but not in the control. In the vineyards Oribatula excavata dominated (D = 25), followed by Minunthozetes quadriareatus and Passalozetes africanus (D = 18 and 14, respectively), while in the control these species were not abundant. In the control the most abundant species was Oppiella subpectinata (D = 28), followed by Eremulus flagellifer (D = 20). Podoribates longipes and Steganacarus boulfekhari are reported for the first time in Spain. To conclude, the oribatid mites did not benefit from the organic cultivation of the vineyards, probably because they are tolerant to herbicides used in the conventional systems but sensitive to mechanical cultivation of soil, which was even more intense in organic vineyards than in the conventional ones.

Ermilov S. G. - One of the best experts on this subject based on the ideXlab platform.

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