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1,131 results for “oribatid mites”
FIGURE 6 in New species and records of oribatid mites of the genus Protoribates (Acari Oribatida, Haplozetidae) from China
FIGURE 6. Protoribates tibetensis sp. nov., adult. A. subcapitulum, ventral view; B. palp, right, antiaxial view; C. chelicera, right, antiaxial view. Scale bars 50 μm.
FIGURE 12 in New species and records of oribatid mites of the genus Protoribates (Acari Oribatida, Haplozetidae) from China
FIGURE 12. Protoribates sichuanensis sp. nov., adult. dorsal view (A2 lost on left side, A3 on left side large, CYN-18-141-2, male). Scale bar 50 μm.
FIGURE 11 in New species and records of oribatid mites of the genus Protoribates (Acari Oribatida, Haplozetidae) from China
FIGURE 11. Protoribates sichuanensis sp. nov., adult. A. tarsus of leg II, right, antiaxial view; B. genu, femur and trochanter of leg III, left, antiaxial view; C. leg IV, left, antiaxial view. Scale bar 30 μm.
FIGURE 15. Protoribates geonjiensis Choi, 1994, adult. A in New species and records of oribatid mites of the genus Protoribates (Acari Oribatida, Haplozetidae) from China
FIGURE 15. Protoribates geonjiensis Choi, 1994, adult. A. dorsal view; B. bothridial setae. Scale bars: A=50 μm, B=25 μm.
FIGURE 18 in New species and records of oribatid mites of the genus Protoribates (Acari Oribatida, Haplozetidae) from China
FIGURE 18. Protoribates oblongus (Ewing, 1909), adult, showing variations among individuals. A. dorsal view (setae h2 anterior to h1, setae h3 away from A2); B. dorsal view (h3 close to A2, setae h1 anterior to h2). Scale bars 100 μm
FIGURE 3 in New species and records of oribatid mites of the genus Protoribates (Acari Oribatida, Haplozetidae) from China
FIGURE 3 Protoribates tibetensis sp. nov., adult. A. anterior part of body, lateral view; B. posterior part of body, lateral view. Scale bar 100 μm.
FIGURE 19 in New species and records of oribatid mites of the genus Protoribates (Acari Oribatida, Haplozetidae) from China
FIGURE 19. Protoribates oblongus (Ewing, 1909), adult. A. ventral view; B. subcapitulum, ventral view. Scale bars: A=100 μm, B=30 μm.
FIGURE 4 in New species and records of oribatid mites of the genus Protoribates (Acari Oribatida, Haplozetidae) from China
FIGURE 4. Protoribates tibetensis sp. nov., adult. A. leg I, right, antiaxial view; B. genu, femur and part of trochanter of leg II, right, antiaxial view. Scale bar 50 μm.
FIGURE 2 in Three new species of oribatid mites of the family Galumnidae (Acari, Oribatida) from South Africa
FIGURE 2. Pilogalumna hogsbackensis sp. nov., adult: A—subcapitulum, ventral view; B—chelicera, left, paraxial view; C—palp, left, antiaxial view; D—leg I (trochanter omitted), left, paraxial view; E—leg II, right, antiaxial view; F—leg III, left, antiaxial view; G—leg IV, left, antiaxial view. Scale bar 20 μm (A–C), 50 μm (D–G).
FIGURE 1 in Three new species of oribatid mites of the family Galumnidae (Acari, Oribatida) from South Africa
FIGURE 1. Pilogalumna hogsbackensis sp. nov., adult: A—dorsal view; B—ventral view (gnathosoma and legs omitted); C—lateral view (pteromorph, gnathosoma and legs omitted); D—posterior view (pteromorphs omitted). Scale bar 100 μm.
FIGURE 4 in Three new species of oribatid mites of the family Galumnidae (Acari, Oribatida) from South Africa
FIGURE 4. Stictozetes ihaguensis sp. nov., adult: A—dorsal view; B—ventral view (gnathosoma and legs omitted); C—lateral view (pteromorph, gnathosoma and legs omitted); D—posterior view (pteromorphs omitted). Scale bar 50 μm.
FIGURE 3 in Three new species of oribatid mites of the family Galumnidae (Acari, Oribatida) from South Africa
FIGURE 3. Pergalumna amatholensis sp. nov., adult: A—dorsal view; B—ventral view (gnathosoma and legs omitted); Clateral view (pteromorph, gnathosoma and legs omitted); D—posterior view (pteromorphs omitted). Scale bar 50 μm.
Data from: Seasonal dynamics and changing sea level as determinants of the community and trophic structure of oribatid mites in a salt marsh of the Wadden Sea
Global change processes affect seasonal dynamics of salt marshes and thereby their plant and animal communities. However, these changes have been little investigated for microarthropod communities. We studied the effect of seasonality and changes in sea level on oribatid mites in the natural salt marsh and on artificial islands in the back-barrier environment of the island Spiekeroog (Wadden Sea, Germany). Three zones of the artificial islands were filled with transplanted sods from the lower salt marsh zone and thereby exposed to three different inundation frequencies. We hypothesized that oribatid mite communities will differ along the natural salt marsh vegetation zones [upper salt marsh (USM), lower salt marsh (LSM), pioneer zone (PZ)], which are influenced by different tidal regimes. Accordingly, total oribatid mite densities declined from the USM and LSM to the PZ. Similarly, oribatid mite species compositions changed along the salt marsh transect and also responded to variations in inundation frequency in LSM on artificial islands with typical species of the USM, LSM and PZ being Multioppia neglecta (USM), Hermannia pulchella (LSM), Zachvatkinibates quadrivertex (LSM, PZ) and Ameronothrus schneideri (LSM, PZ). Oribatid mite density in the salt marsh and on the artificial islands was at a maximum in winter and spring; this was due in part to high density of juveniles, pointing to two reproductive periods. We hypothesized that oribatid mite trophic structure changes due to variations in abiotic (e.g., tidal dynamics, temperature) and biotic conditions (e.g., resource availability). Stable isotope (15N, 13C) and neutral lipid fatty acid analyses indicated that oribatid mite species have different diets with e.g., Z. quadrivertex feeding on macroalgae and fungi, A. schneideri feeding on microalgae and bacteria, and Scheloribates laevigatus and M. neglecta feeding on dead organic matter, bacteria and fungi. Overall, the results indicate that oribatid mite species in salt marshes are affected by changes in environmental factors such as inundation intensity, with the effects being most pronounced in species with narrow trophic niches and limited niche plasticity. The results also indicate that oribatid communities of the LSM respond little to short-term (one year) changes in inundation frequency.
Population asynchrony alone does not explain stability in species rich soil animal assemblages: the stabilising role of forest age on oribatid mite communities
<p>1. The importance of microbial and plant communities in the control of the diversity and structure of soil animal communities has been clarified over the last decade. Previous research focused on abiotic factors, niche separation and spatial patterns. Significant gaps still exist in our knowledge of the factors that control the stability of these communities over time.</p> <p>2. We analysed a nine-year data set form the national Long-term Ecological Research Network of Latvia. We focused on 117 oribatid species from three Scots pine forests of different age (<40 yrs, 65 yrs, and >150 yrs) and structure. For each forest type, 100 samples were collected each year, providing very high replication and long of time series for a soil community. We assessed different aspects of stability: we used a dynamic null model, parametrised on observed growth rates, to test the hypothesis that asynchrony in species populations stabilises total community size; we also analysed alpha and beta diversity over time to test the hypothesis that temporal variation in species composition and relative abundances is controlled by forest attributes.</p> <p>3. Real communities can be more stable than their stochastic counterparts if species are asynchronous, confirming for the first time the role of asynchrony in stabilising soil communities. Yet, while some real communities were more stable and had higher abundance and growth rates than others, they were not necessarily more asynchronous than the less stable communities. Species composition and relative abundances were also less variable in the more stable communities.</p> <p>4. Species asynchrony generally stabilises species rich communities but is not sufficient to explain different levels of stability between forests. Forest age is a key factor explaining different levels of overyielding and so stability. Data suggests that both asynchrony and high diversity of microhabitat structure of Scots pine forests promote stability of soil animal communities.</p>
FIGURE 4 in Oribatid mites of the genera Belba and Belbodamaeus (Acari: Oribatida: Damaeidae) from Eastern Mongolia
FIGURE 4. Belbodamaeus rarituberculatus sp. nov. A: Leg I (right, antiaxial); B: Leg III (right, antiaxial); C: Leg IV (right, antiaxial); D: Leg II (right, antiaxial).
FIGURE 2 in Oribatid mites of the genera Belba and Belbodamaeus (Acari: Oribatida: Damaeidae) from Eastern Mongolia
FIGURE 2. Belba heterosetosa sp. nov. A: Leg I (right, antiaxial); B: Leg II (right, antiaxial); C: Leg III (trochanter separately shown; right, antiaxial); D: Leg IV (trochanter separately shown; right, antiaxial).
FIGURE 5 in Oribatid mites of the genera Belba and Belbodamaeus (Acari: Oribatida: Damaeidae) from Eastern Mongolia
FIGURE 5. Two known species of Belba. A: Belba mongolica Bayartogtokh, 2000 (dorsal view); B: Belba crassisetosa Bayartogtokh, 2000 (dorsal view).
FIGURE 1 in Oribatid mites of the genera Belba and Belbodamaeus (Acari: Oribatida: Damaeidae) from Eastern Mongolia
FIGURE 1. Belba heterosetosa sp. nov. A: Dorsal view; B: Ventral view; C: Lateral view; D: Genital plate; E: Anal plate.
FIGURE 5. Cultroribula vtorovi Krivolutsky, 1971. A in Oribatid mites of the family Astegistidae (Acari: Oribatida) in Mongolia
FIGURE 5. Cultroribula vtorovi Krivolutsky, 1971. A: Dorsal view; B: Ventral view; C: Sensillus and bothridium; D: Prodorsum and anterior part of notogaster.
FIGURE 2 in Oribatid mites of the family Astegistidae (Acari: Oribatida) in Mongolia
FIGURE 2. Cultroribula taigagica sp. nov. A: Dorsal view; B: Ventral view; C: Lateral view of proterosoma; D: Sensillus and bothridium; E: Anterior part of prodorsum (flattened); F: Lamellae.
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