scholarly journals The mosaic distribution pattern of two sister bush‐cricket species and the possible role of reproductive interference

2020 ◽  
Vol 10 (5) ◽  
pp. 2570-2578
Author(s):  
Martina Dorková ◽  
Anton Krištín ◽  
Benjamín Jarčuška ◽  
Peter Kaňuch
Keyword(s):  
Distribution Pattern ◽  
Reproductive Interference ◽  
Mosaic Distribution ◽  
Bush Cricket

The role of non-dipterous insects in the pollination of cocoa in Brazil

1978 ◽  
Vol 68 (4) ◽  
pp. 559-574 ◽  
Author(s):  
J. A. Winder
Keyword(s):  
Distribution Pattern ◽  
Significant Positive Correlation ◽  
Favourable Effect ◽  
Positive Correlation ◽  
Treated Area ◽  
Untreated Area ◽  
Toxoptera Aurantii ◽  
Mosaic Distribution

AbstractField collections in Bahia State, Brazil, of open cocoa flowers from an untreated plantation and one treated with insecticide and fungicide showed that Homoptera, including the cicadellid Xesrocephalus ancorifer Linnavuori, the aphidid Toxoptera aurantii (Boy.), and species of Pseudococcidae and Margarodidae (Coccoidea), constituted 96% of the total number of insects collected. In the untreated area, Wasmannia rochai Ford formed 22% of the ants collected and Brachymyrmex pictus Mayr, Crernatogaster ? parabiotica Forel,Iridomyrmex sp., Pheidole sp. and Solenopsis sp., a further 48%, whereas in the treated area, 47% were C. parabiotica, 14% W. rochai and 9% B. heeri Forel. There was evidence of a mosaic distribution pattern for the ant species. No cocoa pollen was found on any of the insects collected. Total pollination ranged between 7·4 and 8·1 % and effective pollination between 3·7 and 2·8 % in the treated and untreated areas, respectively. Approximately 76% of the pollen masses were stylar, with 38% of the ball type and 54% of the smear type, whereas the 16% stigmatic pollen masses consisted of 63% ball and 29% smear types; 44% of the stigmatic pollinations were effective, compared with only 33 % of the stylar ones. Some quadrats were more attractive to pollinators than others, and there was a significant positive correlation between percentage effective pollination and insolation, probably due to the favourable effect of sunshine on Forcipomyia activity.

scholarly journals The role of organic matter in formation of the properties of a shale deposit

2019 ◽  
Vol 484 (2) ◽  
pp. 220-223
Author(s):  
И. Ф. Юсупова
Keyword(s):  
Organic Matter ◽  
Carbonate Rocks ◽  
Strength Properties ◽  
Low Density ◽  
Lower Strength ◽  
Reduction Processes ◽  
Local Areas ◽  
Oil Shales ◽  
Mosaic Distribution

Baltic oil shales — kukersites were studied as an example of rocks with rock-forming organic matter (OM). The volumetric significance of their OM is shown (due to the low density) in the volume and thickness of the shale layers. A higher OM content is responsible for a lower strength of the shales relative to the carbonate rocks of the deposit. The variable OM contents and other heterogeneities of the shale layers (structure, nodules, etc.) are factors of the mosaic distribution of areas with different density–strength properties and, as a result, of uneven reduction of layers and their deformation in the case of OM loss (full or partial). It is concluded that the intercalation of kukersite and limestone layers leads to density and strength anisotropy of the shale deposit. Episodic loss of OM and carbonates by the shales is considered for the local areas of the deposit: here, kukersites contain only a terrigenous component with clasts of limestones, shales, and epigenetic sulfides. The loss of OM is explained by sulfate-reduction processes in the underground hydrosphere.

Remote Sources of Surface Temperature Cold Bias over the Tibetan Plateau: Role of Tropical SST Climatological Bias

2020 ◽  
Author(s):  
Yuting Wu ◽  
Xiaoming Hu ◽  
Ziqian Wang ◽  
Zhenning Li ◽  
Song Yang
Keyword(s):  
Tibetan Plateau ◽  
Surface Temperature ◽  
Distribution Pattern ◽  
Climate Models ◽  
Cmip5 Models ◽  
Cold Bias ◽  
The Tibetan Plateau ◽  
Sst Bias ◽  
Hypothesis Model

<p>The surface temperature cold bias over the Tibetan Plateau (TP) is a long-lasting problem in both reanalysis data and climate models. While previous studies have mainly focused on local processes for this bias, the TP surface temperature is also closely related to tropical SST in both observations and Coupled Model Inter-comparison Project (CMIP5) models. This study investigates the role of tropical SST climatological bias in the TP surface temperature cold bias, and analysis of CMIP5 models suggests that the surface temperature cold bias over the TP is more obvious (about 4 K) in winter, with an east-west distribution pattern, than in summer (about 1 K), with a south-north distribution pattern. Considering that the tropical SST bias in CMIP5 models may be an important source of the TP surface temperature cold bias, a series of model experiments were conducted by the NCAR CAM4 to test the hypothesis. Model experiment results show that the tropical SST bias can reproduce cold bias over the TP, with 2 K in winter and about 0.5 K in summer. The mechanisms for TP surface temperature cold bias are different in winter and summer. In winter, tropical SST bias influences the TP surface temperature mainly by anomalous snow cover, while anomalous precipitation and clouds are more important for the temperature bias in summer.</p>

scholarly journals Two functional types of attachment pads on a single foot in the Namibia bush cricket Acanthoproctus diadematus (Orthoptera: Tettigoniidae)

2015 ◽  
Vol 282 (1809) ◽  
pp. 20142976 ◽  
Author(s):  
Constanze Grohmann ◽  
Miriam Judith Henze ◽  
Thomas Nørgaard ◽  
Stanislav N. Gorb
Keyword(s):  
Vertical Plate ◽  
Glass Plate ◽  
Shear Forces ◽  
Ground Pattern ◽  
First Report ◽  
Functional Types ◽  
Attachment Structures ◽  
Unusual Combination ◽  
Bush Cricket

Insects have developed different structures to adhere to surfaces. Most common are smooth and hairy attachment pads, while nubby pads have also been described for representatives of Mantophasmatodea, Phasmida and Plecoptera. Here we report on the unusual combination of nubby and smooth tarsal attachment structures in the !nara cricket Acanthoproctus diadematus . Their three proximal tarsal pads (euplantulae) have a nubby surface, whereas the most distal euplantula is rather smooth with a hexagonal ground pattern resembling that described for the great green bush-cricket Tettigonia viridissima . This is, to our knowledge, the first report on nubby euplantulae in Orthoptera and the co-occurrence of nubby and smooth euplantulae on a single tarsus in a polyneopteran species. When adhering upside down to a horizontal glass plate, A. diadematus attaches its nubby euplantulae less often, compared to situations in which the animal is hanging upright or head down on a vertical plate. We discuss possible reasons for this kind of clinging behaviour, such as morphological constrains, the different role of normal and shear forces in attachment enhancement of the nubby and smooth pads, ease of the detachment process, and adaptations to walking on cylindrical substrates.

scholarly journals Evaluation of Thematic Parks in Bandung City Based on Spatial Equity Perspective

2019 ◽  
Author(s):  
Rani Widyahantari ◽  
Iwan Rudiarto
Keyword(s):  
Distribution Pattern ◽  
Nearest Neighbor ◽  
City Center ◽  
Open Spaces ◽  
Spatial Equity ◽  
Scale Category ◽  
The City ◽  
Economic Function ◽  
Equity Perspective

The existence of Green Open Spaces (GOS) in big cities tend to decrease and not evenly distributed. Whereas, the role of GOS is essential for ecological, social, and economic function, also as the city’s aesthetic. Bandung City attempted to meet the needs of GOS by developing many thematic parks, the park which added by unique theme. Thematic parks were built to improve citizen happiness index, but its locations were mostly located in the city center as it is a revitalization of many old city parks. This research is addressed to evaluate the thematic parks provision from spatial equity perspective which seen from the distribution pattern and service range. The distribution pattern analyzed by nearest neighbor analysis of GIS while the service range will be viewed both from normative sight and user. The results showed that the provision of thematic parks in Bandung City only focused on the particular area and had lack of service coverage which indicates spatial injustice. Some areas oversupply and at the same time not serviced at all by thematic parks. None of the thematic parks meets the city scale category. People feel the presence of thematic parks in their neighborhood is very beneficial. Proximity distance is not only the main reason for visiting the park but also influenced by attractiveness and the suitability of the theme with the community’s characteristics.

Mechanistic insights into EGFR membrane clustering revealed by super-resolution imaging

Nanoscale ◽  
2015 ◽  
Vol 7 (6) ◽  
pp. 2511-2519 ◽  
Author(s):  
Jing Gao ◽  
Ye Wang ◽  
Mingjun Cai ◽  
Yangang Pan ◽  
Haijiao Xu ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Lipid Rafts ◽  
Essential Role ◽  
Super Resolution ◽  
Stochastic Optical Reconstruction Microscopy ◽  
Polarized Cells ◽  
Resolution Imaging ◽  
Optical Reconstruction ◽  
Cluster Maintenance

We investigate the distribution of membrane EGFR by direct stochastic optical reconstruction microscopy (dSTORM). Our results illustrate the clustering distribution pattern of EGFR in polarized cells and uncover the essential role of lipid rafts in EGFR cluster maintenance.

Movement and dispersal patterns in the bush cricket Pholidoptera griseoaptera: the role of developmental stage and sex

2005 ◽  
Vol 30 (4) ◽  
pp. 419-427 ◽  
Author(s):  
Tim Diekotter ◽  
Daniela Csencsics ◽  
Carmen Rothenbuhler ◽  
Regula Billeter ◽  
PETER J. Edwards
Keyword(s):  
Developmental Stage ◽  
Dispersal Patterns ◽  
Bush Cricket
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