1,234 research outputs found
FIGURE 3 in First record of the genus Troglocollops (Coleoptera, Malachiidae) from China with description of a new species
No full textFIGURE 3. Troglocollops (Troglocollopsoides) sinicus Tong & Yang sp. nov., paratype, female: a dorsal view, b pygidium, c ultimate abdominal ventrite, d ovipositor. Scale bars: a: 1 mm; b–d: 0.2 mm.Published as part of Tong, Junbo, Tshernyshev, Sergei E., Liu, Haoyu & Yang, Yuxia, 2022, First record of the genus Troglocollops (Coleoptera, Malachiidae) from China with description of a new species, pp. 492-498 in Zootaxa 5195 (5) on page 496, DOI: 10.11646/zootaxa.5195.5.7, http://zenodo.org/record/722380
FIGURE 1 in A contribution to the genus Romattalus Tshernyshev, 2021 (Coleoptera, Malachiidae)
No full textFIGURE 1. Romattalus flavojubatus Tong & Yang, sp. nov., habitus: a holotype, male, dorsal view, b paratype, female, dorsal view, c holotype, male, lateral view. Scale bars: a–c: 1.0 mm.Published as part of Tong, Junbo, Tshernyshev, Sergei E., Liu, Haoyu & Yang, Yuxia, 2022, A contribution to the genus Romattalus Tshernyshev, 2021 (Coleoptera, Malachiidae), pp. 585-590 in Zootaxa 5222 (6) on page 587, DOI: 10.11646/zootaxa.5222.6.5, http://zenodo.org/record/747742
Earthworms neutralize the influence of components of particulate pollutants on soil extracellular enzymatic functions in subtropical forests
No full textHuman activities are increasing the input of atmospheric particulate pollutants to forests. The components of particulate pollutants include inorganic anions, base cations and hydrocarbons. Continuous input of particulate pollutants may affect soil functioning in forests, but their effects may be modified by soil fauna. However, studies investigating how soil fauna affects the effects of particulate pollutants on soil functioning are lacking. Here, we investigated how earthworms and the particulate components interact in affecting soil enzymatic functions in a deciduous ( Quercus variabilis ) and a coniferous ( Pinus massoniana ) forest in southeast China. We manipulated the addition of nitrogen (N, ammonium nitrate), sodium (Na, sodium chloride) and polycyclic aromatic hydrocarbons (PAHs, five mixed PAHs) in field mesocosms with and without Eisenia fetida , an earthworm species colonizing forests in eastern China. After one year, N and Na addition increased, whereas PAHs decreased soil enzymatic functions, based on average Z scores of extracellular enzyme activities. Earthworms generally stabilized soil enzymatic functions via neutralizing the effects of N, Na and PAHs addition in the deciduous but not in the coniferous forest. Specifically, earthworms neutralized the effects of N and Na addition on soil pH and the effects of the addition of PAHs on soil microbial biomass. Further, both particulate components and earthworms changed the correlations among soil enzymatic and other ecosystem functions in the deciduous forest, but the effects depended on the type of particulate components. Generally, the effects of particulate components and earthworms on soil enzymatic functions were weaker in the coniferous than the deciduous forest. Overall, the results indicate that earthworms stabilize soil enzymatic functions in the deciduous but not the coniferous forest irrespective of the type of particulate components. This suggests that earthworms may neutralize the influence of atmospheric particulate pollutants on ecosystem functions, but the neutralization may be restricted to deciduous forests.Open-Access-Publikationsfonds 202
FIGURE 2 in First record of the genus Troglocollops (Coleoptera, Malachiidae) from China with description of a new species
No full textFIGURE 2. Troglocollops (Troglocollopsoides) sinicus Tong & Yang sp. nov., holotype, male: a pygidium, b ultimate abdominal ventrite, c aedeagus with tegmen and spicular forc, lateral view, d aedeagus with tegmen and spicular forc, ventral view. Scale bars: a–d: 0.2 mm.Published as part of Tong, Junbo, Tshernyshev, Sergei E., Liu, Haoyu & Yang, Yuxia, 2022, First record of the genus Troglocollops (Coleoptera, Malachiidae) from China with description of a new species, pp. 492-498 in Zootaxa 5195 (5) on page 495, DOI: 10.11646/zootaxa.5195.5.7, http://zenodo.org/record/722380
Dynamic aggregation strategy for a virtual power plant to improve flexible regulation ability
No full textThe virtual power plant (VPP) provides an effective way for the coordinated and optimized operation of distributed energy resources (DERs). To solve the aggregation problem of a VPP containing scattered layouts and heterogeneous performance DERs, this study proposes a dynamic aggregation strategy to improve the flexible regulation ability of the VPP. A VPP aggregation model considering network constraints and temporal coupling constraints of DERs is constructed, while some VPP performance parameters are proposed to characterize and quantify the regulation ability. An uncertainty set considering time-series coupling properties of variables is constructed, and an aggregation method under uncertainty scenarios is proposed based on a two-stage robust optimization model. In addition, a dynamic aggregation strategy is proposed for the application of VPPs in electricity markets. Finally, case studies demonstrates that the proposed method provides a more extensive feasible region compared to other methods, and the deviation power remains within a reasonable range. The dynamic aggregation strategy facilitates the synergistic and correlative operation of DERs, exploits the regulation ability of the VPP in frequency regulation and spinning reserve, and improves the feasibility of practical applications. Simultaneously, the income of the VPP increased by 29.5 %
Microhabitat more than ecosystem type determines the trophic position of springtail species
No full textSynergy of saprotrophs with mycorrhiza for litter decomposition and hotspot formation depends on nutrient availability in the rhizosphere
No full textRomattalus Tshernyshev 2021
No full textGenus Romattalus Tshernyshev, 2021 Chinese name: Ififfmoi Romattalus Tshernyshev, 2021: 491. Type species: Romattalus dudkoi Tshernyshev, 2021, by original designation. Diagnosis. Medium-sized beetles, about 4 mm in length. Body yellow to black with blue metallic lustre (Figs 1a–b). Male sexually dimorphic characters present on pronotum possessing tufts of long pendent yellow hairs on lateral sides (Figs 1a, 1c). Tarsomere 2 of the fore tarsi lacking special comb. Antennae long and slender. Elytra lacking special structures. Ultimate abdominal ventrite (apical sternite) elongate and divided (Fig. 2b). Distribution. Himalaya region: China (Xizang), Nepal.Published as part of Tong, Junbo, Tshernyshev, Sergei E., Liu, Haoyu & Yang, Yuxia, 2022, A contribution to the genus Romattalus Tshernyshev, 2021 (Coleoptera, Malachiidae), pp. 585-590 in Zootaxa 5222 (6) on page 586, DOI: 10.11646/zootaxa.5222.6.5, http://zenodo.org/record/747742
Cylinder and metal grating polarization beam splitter
No full textWe propose a novel and compact metal grating polarization beam splitter (PBS) based on its different reflected and transmitted orders. The metal grating exhibits a broadband high reflectivity and polarization dependence. The rigorous coupled wave analysis is used to calculate the reflectivity and the transmitting spectra and optimize the structure parameters to realize the broadband PBS. The finite-element method is used to calculate the field distribution. The characteristics of the broadband high reflectivity, transmitting and the polarization dependence are investigated including wavelength, period, refractive index and the radius of circle grating. When grating period d=400nm, incident wavelength =441nm, incident angle =60 degrees and radius of circle d/5, then the zeroth reflection order R-0=0.35 and the transmission zeroth order T-0=0.08 for TE polarization, however, T-0=0.34 and R-0=0.01 for TM mode. The simple fabrication method involves only single etch step and good compatibility with complementary metal oxide semiconductor technology. PBS designed here is particularly suited for optical communication and optical information processing.National Natural Science Foundation of China [60907003]; Foundation of NUDT [JC13-02-13]; Hunan Provincial Natural Science Foundation of China [13JJ3001]; Program for New Century Excellent Talents in University [NCET-12-0142]SCI(E)ARTICLE141404-14106
Romattalus flavojubatus Tong & Tshernyshev & Liu & Yang 2022, sp. nov.
No full textRomattalus flavojubatus Tong & Yang, sp. nov. (Figs 1–3) Chinese name: WDZIfiffm http://zoobank.org/ urn:lsid:zoobank.org:pub: 42272B76-5C79-4361-807F-B94AE4D2E619 Diagnosis. This species is similar to R. dudkoi, but can be distinguished from the latter by having pronotum with yellow hairs on lateral sides (Figs 1a, 1c), and aedeagus approximately parallel sided for basal 2/ 3 in ventral view, then slightly narrowing to blunt apex (Fig. 3c). In R. dudkoi, pronotum with brown and yellow hairs on lateral sides, and aedeagus approximately parallel sided for basal 1/ 2 in ventral view, then distinctly swollen, widest at basal 3/4 (Fig. 4a). Description. Male. Length of body 3.7 mm, width at widest part of elytra 1.5 mm and at the base of elytra 1.1 mm. Head yellow with frons and interocular area black, mouthparts yellow. Antennae yellow to dark brown, antennomeres 1–4 yellow with dark spots on dorsal side, remaining part mostly dark brown. Pronotum yellow. Elytra black with blue metallic lustre and yellow elytral bases and humeral angles. Scutellar shield yellow to black. Fore legs yellow with brown tibia and tarsi, middle legs yellow with dark stripes on upperside femora and black tibia and tarsi, hind leg mostly black (Fig. 1a). Prosternum and mesoventrite yellow. Metaventrite black. Abdomen mostly yellow. Vesicles and thoracic mesepimera yellow. Body sparsely covered with yellow adpressed pubescence. Sculptures evenly punctuated, stronger on elytra than other parts. Head wider than pronotum. Frons flat, interocular area slightly impressed. Clypeus distinct. Antennae filiform reaching middle of the elytra; antennomere 1 elongate, slightly widened and subconical; 2 shortened and rectangular; 3–4 shortened and subcylindrical; 5–11 cylindrical and almost equal in length. Pronotum subquadrate, anterior and posterior margins straight; basal side is slightly elevated; anterior angles strongly impressed and possessing a compact tuft of long yellow hairs on lateral sides of pronotum. Scutellar shield trapezoid and transverse, almost hidden by pronotum, slightly thickened and elevated. Elytra subparallel, widened behind the base and evenly rounded at apices, base of elytra distinctly wider than pronotum. Humeri distinct, slightly protruding. Disc distinctly impressed just below scutellum and strongly convex posteriorly. Elytral apices evenly rounded. Hind wings normally developed. Legs slender. Hind femora reaching elytral apices. All tibiae thin and straight.All tarsi with 5 tarsomeres; tarsomere 2 of the fore tarsi simple, lacking special comb; tarsomere 5 longest and tarsomere 4 shortest in all legs. Claws thin and curved, with membrane at base and long setae in the middle. Metathorax simple, lacking appendages. Pygidium (apical tergite) short and transverse, with triangular emargination on distal side (Fig. 3a); ultimate abdominal ventrite (apical sternite) bilobed, strong and elongate, each lobe with stretched narrow apex curved inward (Fig. 3b). Tegmen short and wide; aedeagus short and stout, approximately parallel sided for basal 2/ 3 in ventral view, then slightly narrowing to blunt apex; endophallus with a strong spine in the middle (Figs 3c–d). Female. Length of body 3.9 mm, width at widest part of elytra 1.6 mm and at the base of elytra 1.1 mm. Similar to male species except for pronotum lacking hairs on lateral sides (Fig. 1b). Pygidium sub-trapezoid with apical margin emarginate (Fig. 3a). Ultimate abdominal ventrite divided, with long spiculum ventrale (Fig. 3b). Ovipositor elongate and membranous (Fig. 3c). Material examined. Holotype: China: Xizang: ♁, Nyalam County, 28.VII.2005, Aimin Shi leg (MHBU). Paratype: China: Xizang: 1♀, same data as holotype. Distribution. China (Xizang). Etymology. The specific epithet flavojubatus derives from the Latin words “ flavus ” (= yellow) and “ jubatus ” (= long pendent hairs), refers to its yellow hairs on lateral sides of pronotum.Published as part of Tong, Junbo, Tshernyshev, Sergei E., Liu, Haoyu & Yang, Yuxia, 2022, A contribution to the genus Romattalus Tshernyshev, 2021 (Coleoptera, Malachiidae), pp. 585-590 in Zootaxa 5222 (6) on pages 586-590, DOI: 10.11646/zootaxa.5222.6.5, http://zenodo.org/record/747742
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