Community Richness, Height, Coverage, and Spatial Distribution Mediate Grasshopper Abundance in the Upper Reaches of Heihe River, China

2021 ◽  
Author(s):  
Lili Li ◽  
chengzhang zhao ◽  
xiawei zhao ◽  
dawei wang ◽  
yu li
Keyword(s):  
Spatial Distribution ◽  
Distribution Pattern ◽  
Species Interactions ◽  
Horizontal Distribution ◽  
Heihe River ◽  
Vegetation Community ◽  
Altitude Gradient ◽  
Geostatistical Methods ◽  
Relationship Of ◽  
The Relationship

Abstract Species interactions are often context-dependent and complex, such as the grasshopper community and phytoecommunity. The adaption of grasshopper abundance and plant community were determined by topographical heterogeneity. However, it remains vague about how vegetation community, such as coverage, abundance and height, influence the spatial distribution pattern of grasshopper abundance at the altitude gradient. The geostatistical methods were used in natural grassland of the upper reaches of Heihe River to quantify the relationship of spatial correlation. A 5-years investigation shown that 3149 of grasshoppers was collected，belonging to 3 families, 10 genera, and 13 species. The semivariable function of grasshopper abundance and vegetation community followed a nonlinear model. Meanwhile, horizontal distribution of two communities was a clear flaky and plaque distribution pattern, especially at the altitude gradient. The abundance of grasshoppers is opposite to the height and coverage of vegetation and the overall follow ability of coverage, while the local following is consistent. Such as grasshopper abundance, the above 2750m sample with the opposite trend, the following areas were consistent. The grasshoppers exhibited the varieties on vegetation characters among all directions. On the different habits, the spatial distribution formed uniform trends; meanwhile, on the same, the trends diversified with altitude gradient, formed embedded striped patches structure.

scholarly journals Vegetation richness, height, coverage and spatial distribution mediate grasshopper abundance in the upper reaches of Heihe River, China

2017 ◽  
Author(s):  
Lili Li ◽  
Chengzhang Zhao ◽  
Tingjun Zhang ◽  
dawei wang ◽  
yuxing li ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Distribution Pattern ◽  
Species Interactions ◽  
Horizontal Distribution ◽  
Heihe River ◽  
Vegetation Community ◽  
Altitude Gradient ◽  
Geostatistical Methods ◽  
Relationship Of ◽  
The Relationship

Species interactions are often context-dependent and complex, such as the grasshopper community and phytoecommunity. The adoption of grasshopper abundance and vegetation community was determined by topographical heterogeneity. However, it remains vague about how vegetation community, such as coverage abundance and height, influence the spatial distribution pattern of grasshopper abundance at the altitude gradient. Using Geostatistical methods in natural grassland of the upper reaches of Heihe River to quantitatively study the relationship of spatial correlation. A 3 years investigation was shown that 3149 grasshoppers were collected, belonging to 3 families, 10 genera, and 13 species. The semivariable function of grasshopper abundance and vegetation community followed a nonlinear model. Meanwhile, horizontal distribution of two communities was a clear flaky and plaque distribution pattern, especially at the altitude gradient. The abundance of grasshoppers is opposite to the height and coverage of vegetation and the overall followability of coverage, while the local following is consistent. Such as grasshopper abundance, the above 2750m sample with the opposite trend, the following areas are consistent. Finally, grasshoppers have the different choice on different vegetation characteristics in different directions, formed of specific trend characteristics; and the spatial distribution trend is different even with the same community indicators, formed of embedded striped patches structure.

scholarly journals Vegetation richness, height, coverage and spatial distribution mediate grasshopper abundance in the upper reaches of Heihe River, China

2017 ◽  
Author(s):  
Lili Li ◽  
Chengzhang Zhao ◽  
Tingjun Zhang ◽  
dawei wang ◽  
yuxing li ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Distribution Pattern ◽  
Species Interactions ◽  
Horizontal Distribution ◽  
Heihe River ◽  
Vegetation Community ◽  
Altitude Gradient ◽  
Geostatistical Methods ◽  
Relationship Of ◽  
The Relationship

Species interactions are often context-dependent and complex, such as the grasshopper community and phytoecommunity. The adoption of grasshopper abundance and vegetation community was determined by topographical heterogeneity. However, it remains vague about how vegetation community, such as coverage abundance and height, influence the spatial distribution pattern of grasshopper abundance at the altitude gradient. Using Geostatistical methods in natural grassland of the upper reaches of Heihe River to quantitatively study the relationship of spatial correlation. A 3 years investigation was shown that 3149 grasshoppers were collected, belonging to 3 families, 10 genera, and 13 species. The semivariable function of grasshopper abundance and vegetation community followed a nonlinear model. Meanwhile, horizontal distribution of two communities was a clear flaky and plaque distribution pattern, especially at the altitude gradient. The abundance of grasshoppers is opposite to the height and coverage of vegetation and the overall followability of coverage, while the local following is consistent. Such as grasshopper abundance, the above 2750m sample with the opposite trend, the following areas are consistent. Finally, grasshoppers have the different choice on different vegetation characteristics in different directions, formed of specific trend characteristics; and the spatial distribution trend is different even with the same community indicators, formed of embedded striped patches structure.

scholarly journals Correlation of environmental factors and spatial distribution of moluscs communities in mangrove reboisation areas of Seribu Islands, Indonesia

2019 ◽  
Vol 2 (2) ◽  
Author(s):  
Syahrial Syahrial ◽  
Eryc Pranata ◽  
Hendri Susilo
Keyword(s):  
Principal Component Analysis ◽  
Spatial Distribution ◽  
Environmental Factors ◽  
Principal Component ◽  
Quality Standard ◽  
Small Plot ◽  
Line Transects ◽  
Relationship Of ◽  
The Relationship ◽  
Mangrove Reforestation

Mangrove reforestation is often carried out in various regions or regions, but information about the relationship of environmental factors and the distribution of fauna associations is still very minimal. The Principal Component Analysis (PCA) study on the correlation of environmental factors and the spatial distribution of the molusks community in the Seribu Islands mangrove reforestation area was conducted in March 2014 with the aim of analyzing environmental factors for the diversity and presence of the molusks. Environmental factors are measured insecurely, while the moluccan community is collected by making line transects and plots measuring 10 x 10 m2 and in the size of 10 x 10 m2, a small plot of 1 x 1 m2 is made. The results of the study show that environmental factors are not so different between stations and do not exceed the quality standard for the lives of 4 species of mollusks, where the parameters of aquatic pH are the environmental factors that most influence their distribution.Keywords: environmental factors, distribution, mollusks community, mangrove reforestation, Seribu Islands

scholarly journals STATISTICAL ANALYSIS OF THE SPATIAL RELASHIONSHIP OF CAATINGA AND PHYSIOGRAPHIC FACTORS THROUGH REMOTE DATA

FLORESTA ◽  
2019 ◽  
Vol 49 (4) ◽  
pp. 755
Author(s):  
Janisson Batista de Jesus ◽  
Mariana Mizutani Ribeiro ◽  
Tatiana Mora Kuplich ◽  
Bruno Barros de Souza ◽  
Dráuzio Correia Gama
Keyword(s):  
Spatial Distribution ◽  
Statistical Analysis ◽  
Arid Region ◽  
Factors Associated ◽  
Independent Variables ◽  
Caatinga Vegetation ◽  
Semi Arid Region ◽  
Relationship Of ◽  
The Relationship ◽  
Semi Arid

The caatinga is characteristic of the semi-arid region of Brazil, of significant coverage in the northeast of the country and, therefore, geoprocessing and statistical techniques can be important tools to analyze the environmental factors associated with its distribution. The present study had the objective of analyzing the relationship of: altimetry, slope, soil type and river proximity in the spatial distribution of the caatinga vegetation, using a database generated by geoprocessing techniques. NDVI was used, and statistical analysis was based on multiple regression and Pearson's correlation. The results show that the weather station is the only variable that presented a high determination coefficient with the caatinga vegetation (R2 = 0.956), while the other independent variables have weak or nonexistent correlation. With the techniques of geoprocessing was allowed to observe that the Caatinga has a generalist spatial distribution of occurrence, not having a defined pattern.

Study on Characteristics of Seismic Ambient Shear Stress in Gansu Province

2014 ◽  
Vol 1065-1069 ◽  
pp. 1433-1437
Author(s):  
Xiu Feng Tian ◽  
Xuan Zhang ◽  
Ju Pu
Keyword(s):  
Shear Stress ◽  
Spatial Distribution ◽  
Stress Field ◽  
Gansu Province ◽  
Seismic Shear ◽  
Tectonic Environment ◽  
Relationship Of ◽  
The Relationship ◽  
Shear Stress Field ◽  
Ambient Shear Stress

The breeding and occurrence of earthquake closely related to the intensity and spatial distribution of ambient shear stress field. Earthquakes would happen when the regional shear stress enhanced to the damage limit of rocks. In this paper, we used some acceleration records in Gansu province, and calculated corresponding seismic shear stress value according to the theory put forward by Professor Chen Peishan. Combined with the tectonic environment, we discussed the relationship of ambient shear stress with the magnitude and hypocentral depth.

scholarly journals STUDY OF ATMOSPHERE INFLUENCE ON RESULTS OF DISTANCE MEASUREMENTS

2019 ◽  
Vol 9 ◽  
pp. 137-143
Author(s):  
Bolatbek Bektanov ◽  
Omar Sarybayev ◽  
Gauhar Serikbayeva ◽  
Azamat Kaldybekov
Keyword(s):  
Refractive Index ◽  
Correlation Analysis ◽  
Experimental Studies ◽  
Index Of Refraction ◽  
Integral Index ◽  
Distance Measurements ◽  
Altitude Gradient ◽  
Relationship Of ◽  
The Relationship

The article describes a method based on the relationship of the integral index of refraction of air with its integral altitude gradient. The refractive index N and its altitude gradient dN / dH are proportional to each other under conditions of limited atmospheric height. It has been established that the gradient of the refractive index can be found by the index itself with a known coefficient of coupling between them. Wherein, it is easy to find the gradient by the angle of complete refraction. Results of experimental studies and recommendations for its use are given. A correlation analysis of the results of synchronous measurements was performed.

scholarly journals Analisis Pola Spasial Penyakit Demam Berdarah Dengue di Kota Bandung Menggunakan Indeks Moran

2018 ◽  
Vol 1 (3) ◽  
Author(s):  
Rika Hernawati ◽  
Muhamad Yordi Ardiansyah
Keyword(s):  
Spatial Distribution ◽  
Spatial Autocorrelation ◽  
Distribution Pattern ◽  
Dengue Fever ◽  
Significance Test ◽  
Spatial Distribution Pattern ◽  
Index Method ◽  
Correlation Relationship ◽  
The One ◽  
Relationship Of

ABSTRACTBandung has the highest case of dengue fever in West Java, which is 3134 cases in 2014. The spread of dengue fever can be analyzed spatially by spatial autocorrelation to find out the correlation relationship pattern between locations. The method of spatial autocorrelation was using the Moran Index method. From these methods can determine the relationship of spatial autocorrelation in the spread of dengue fever and determine spatial distribution pattern of dengue fever in Bandung. The results of spatial autocorrelation analysis shows the spatial autocorrelation in dengue hemorrhagic cases in Bandung, the one-way significance test indicates a positive autocorrelation in Dengue hemorrhagic cases in Bandung and spatial distribution pattern is the spatial distribution pattern of the cluster.Kata kunci: spatial autocorrelation, spatial pattern, Moran Index, dengue fever.ABSTRAKKota Bandung merupakan kota yang mempunyai kasus penyakit demam berdarah tertinggi di Jawa Barat yang berjumlah 3134 kasus pada tahun 2014. Sebaran penyakit demam berdarah dapat dianalisis secara spasial yaitu dengan autokorelasi spasial untuk mengetahui pola hubungan korelasi antar lokasi. Metode autokorelasi spasial yang digunakan adalah metode Indeks Moran. Dari metode tersebut dapat menentukan hubungan autokorelasi spasial dalam penyebaran penyakit demam berdarah dan menentukan pola sebaran spasial penyakit demam berdarah di Kota Bandung. Dari hasil analisis autokorelasi spasial menunjukan terdapat autokorelasi spasial pada kasus demam berdarah dengue di Kota Bandung, uji signifikansi satu arah menunjukan adanya autokorelasi positif pada kasus demam berdarah Dengue di Kota Bandung dan pola sebaran spasial dihasilkan adalah pola spasial sebaran cluster.Keywords: Autokorelasi Spasial, Pola Spasial, Indeks Moran, demam berdarah.

scholarly journals A Guttate Psoriasis That Tends to Spare Three Tattoos: A Macrophage Liaison

2021 ◽  
Vol 2021 ◽  
pp. 1-5
Author(s):  
Panagiota Spyridonos ◽  
Vasiliki Zampeli ◽  
Sophia-Nefeli Rapti ◽  
Ioannis D. Bassukas
Keyword(s):  
Spatial Distribution ◽  
Case Report ◽  
Clinical Studies ◽  
Coefficients Of Variation ◽  
Spatial Concordance ◽  
Guttate Psoriasis ◽  
Clinical Pictures ◽  
Relationship Of ◽  
The Relationship

Induction of new psoriasis sites was reported in only a small amount of psoriasis patients undergoing tattooing, despite the intuitive belief that tattoo trauma might awaken the disease due to the isomorphic phenomenon of Koebner. In this case report, we discuss a patient who presented with a remarkable sparing of his three tattoo sites during a guttate psoriasis flare-up that was unrelated to tattooing. The spatial concordance of tattoo and psoriasis lesions was analyzed on clinical pictures of tattoo sites taken during the psoriasis episode. For the quantification of the spatial distribution of the psoriasis lesions, Voronoi diagrams were generated, and coefficients of variation and the two-sample t-test were employed to compare the distributions of Voronoi patch sizes in different settings. Compared to skin areas without tattoos, a tattoo introduced a higher variation in the sizes of the Voronoi patches centered around psoriasis lesions. Based on our findings, we would like to discuss the possible role of macrophages as the key cellular link in the complex pathophysiologic relationship between tattooing/tattoo and psoriasis. Taking into account the relationship of autophagy and psoriasis lesions, we propose the hypothesis that tattoos represent a “psoriasis-hostile” tissue environment pertained by a population of LAP active M2-polarized macrophages. Further clinical studies of the relationship of psoriasis lesions to the tattooed skin are needed and may provide important insights into the role of macrophages in the pathogenesis of psoriasis.

Spatial Characteristics of Auroral Brightness Fluctuation Spectra

1975 ◽  
Vol 53 (5) ◽  
pp. 504-513 ◽  
Author(s):  
E. V. Pemberton ◽  
G. G. Shepherd
Keyword(s):  
Spatial Distribution ◽  
Frequency Band ◽  
Early Morning ◽  
Geomagnetic Disturbance ◽  
Brightness Fluctuation ◽  
Distinct Frequency ◽  
S Period ◽  
A Site ◽  
Relationship Of ◽  
The Relationship

Observed fluctuations in auroral brightness are reported for the frequency band 0.05 < ƒ < 15 Hz from a site at 60.7° invariant latitude. Four clearly distinct frequency bands were found to exist: at 7 and 2.4 s period, and at 3 and 10 Hz. The spatial distribution of the fluctuations was studied; it is several hundred km in longitudinal extent, narrow in the evening in latitudinal extent but broadening to perhaps 200 km in the early morning, homogeneous and stationary in the sky, equatorward of discrete quiet auroral forms, and strongly responsive to the level of geomagnetic disturbance. The relationship of this fluctuating region to the recently discovered diffuse auroral belt, and the region of hard drizzle precipitation observed by a number of workers is described and discussed. The pulsation mechanism described by Coroniti and Kennel seems very plausible for the 7 and 2.4 s period pulsations.

scholarly journals Spatial distribution evolution and accessibility of A-level scenic spots in Guangdong Province from the perspective of quantitative geography

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0257400
Author(s):  
Zhenjie Liao ◽  
Lijuan Zhang
Keyword(s):  
Spatial Distribution ◽  
Guangdong Province ◽  
Tourism Industry ◽  
Scenic Spot ◽  
Tourism Resources ◽  
Distribution Type ◽  
Relationship Of ◽  
The Relationship ◽  
Stable Development ◽  
Aggregation Phenomenon

As a typical representative of tourism resources, the spatial distribution of A-level scenic spots has a profound impact on the layout of tourism industry. Scenic spot accessibility is also important for the development of tourism. However, the relationship of regional accessibility and spatial distribution of A-level scenic spots are understudied. The study used quantitative geography and geographic information system spatial analysis methods and analyzed the evolution of spatial distribution and regional accessibility of A-level scenic spots in Guangdong Province from 2001 to 2020. The results present the following: 1. Agglomeration distribution is the main distribution type of A-level scenic spots in Guangdong Province, and the spatial distribution is unbalanced. 2. From 2001 to 2020, the spatial distribution of A-level scenic spots in 21 prefecture-level cities of Guangdong Province has gradually developed from "wide gap" to "relatively reasonable." 3. Distribution density of A-level scenic spots in Guangdong Province has evolved into the main core area of high density. 4. Center of the gravity of A-level scenic spots in Guangdong Province developed from east to west during 2002–2007 and moved to the east after 2007. 5. Accessibility between A-level scenic spots and tourist source areas in Guangdong Province is good, with an evident aggregation phenomenon. This study reveals the spatial distribution evolution law and regional accessibility of A-level scenic spots, which is conducive to healthy, sustainable, and stable development of tourism in Guangdong Province.

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