COVID-19 Infection and Mortality: Association with PM_2.5 Concentration and Population Density—An Exploratory Study by Xinyu Yu, Man Sing Wong, Mei Po Kwan, Janet Elizabeth Nichol, Rui Zhu, Joon Heo, Pak Wai Chan, David C. W. Chin, Coco Yin Tung Kwok, Zihan Kan

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Quantification of Wide-Area Norwegian Spring-Spawning Herring Population Density with Ocean Acoustic Waveguide Remote Sensing (OAWRS) by Daniel Duane, Olav Rune Godø, Nicholas C. Makris

“…Ocean Acoustic Waveguide Remote Sensing (OAWRS) was used to instantaneously measure the areal population density of Norwegian herring over more than one thousand square kilometers in spawning grounds near Ålesund, Norway. …”
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The endemic and threatened lizard Liolaemus lutzae (Squamata: Liolaemidae): current geographic distribution and areas of occurrence with estimated population densities by Carlos F. D. Rocha, Carla da C. Siqueira, Cristina V. Ariani

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Population Density and Host Preference of the Japanese Pine Sawyer (<i>Monochamus alternatus</i>) in the Qinling–Daba Mountains of China by Junke Nan, Jingyu Qi, Yuexiang Yang, Mengqin Zhao, Chaoqiong Liang, Hong He, Cong Wei

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Collembolan communities in shrublands along climatic gradients in Europe and the effect of experimental warming and drought on population density, biomass and diversity by Henning Petersen

“…Collembolan biomass and, less distinctly, population density and average individual weight in the control plots decreased from the northern to the southern sites, suggesting a latitudinal cline controlled by tempera- ture or interaction between temperature and moisture. …”
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POPULATION DENSITY OF PHYTONOMUS VARIABILIS HRBST. AND PHYTODECTA FORNICATA BRUGG.... by DANIELA ATANASOVA, IVANKA SEMERDJIEVA

“…The results of the two year study showed that the population density of both pests was higher in the“Mnogolistna 1” fields. …”
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Human Population Density Influences Genetic Diversity of Two <i>Rattus</i> Species Worldwide: A Macrogenetic Approach by Chrystian C. Sosa, Catalina Arenas, Víctor Hugo García-Merchán

“…Based on metadata obtained considering 35 selected studies related to observed heterozygosity, measured by nuclear molecular markers (microsatellites, Single Nucleotide Polymorphisms—SNPs-, restrictition site-associated DNA sequencing -RAD-Seq-), socioeconomic and mobility anthropogenic factors were used as predictors of genetic diversity of <i>R. rattus</i> and <i>R. norvegicus</i>, using the Gini index, principal component analysis and Random Forest Regression as analysis methodology. Population density was on average the best predictor of genetic diversity in the <i>Rattus</i> species analyzed, indicating that the species respond in a particular way to the characteristics present in urban environments because of a combination of life history characteristics and human-mediated migration and colonization processes. …”
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Estimation of passenger car CO2 emissions by population density class based on Japanese vehicle inspection certificate data by Keisuke Matsuhashi, Toshinori Ariga, Masahiro Ishikawa

“…The higher the population density, the smaller was the mileage per vehicle. …”
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Effect of Pheromone-Mediated Mating Disruption on Pest Population Density of <i>Maruca vitrata</i> (Fabricius) (Crambidae: Lepidoptera) by Onkarappa Dhanyakumar, Ramasamy Srinivasan, Muthugounder Mohan, Thiruvengadam Venkatesan, Kamanur Murali Mohan, Narayanappa Nagesha, Paola Sotelo-Cardona

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Population density and seasonality effects on Sin Nombre virus transmission in North American deermice (Peromyscus maniculatus) in outdoor enclosures. by Karoun H Bagamian, Richard J Douglass, Arlene Alvarado, Amy J Kuenzi, Brian R Amman, Lance A Waller, James N Mills

“…Surveys of wildlife host-pathogen systems often document clear seasonal variation in transmission; conclusions concerning the relationship between host population density and transmission vary. In the field, effects of seasonality and population density on natural disease cycles are challenging to measure independently, but laboratory experiments may poorly reflect what happens in nature. …”
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Evaluating the Principles and Guidelines of Urban Intelligence Growth in Future Development of Rasht City Based on Heldern Population Density Model by Asghar Shokrgozar, Zahra Jamshidi, Parvaneh Jamshidi

“…The aim of this paper is the analysis of  the strategies,principle and guidelines of  Urban intelligence  Growth by  emphasizing  on the future expansion of Rasht city  based on Heldern population density model. The results showed that the area of Rasht in years 1961-2006 has increased  from 810 to 12722 hectares and its  population has increased  from 109,491 to 557,336 people which the hurrying development  of the city during this period.Also During the same period, the number of neighborhoods has increased from 8 to 35. …”
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LEAF QUALITY AND YIELD OF Gliricidia sepium (Jacq) Steud UNDER DIFFERENT POPULATION DENSITY AND CUTTING INTERVAL IN COCONUT PLANTATION by S. D. Anis, D. A. Kaligis, B. Tulung, Aryanto

“…The objective of this study was to evaluate leaf quality of Gliricidia sepium (Jacq) Steud and vegetative growth under different population density and cutting interval in coconut plantation. …”
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Abundance and Distribution of Foliage on Balsam Fir and White Spruce in Reference to Spruce Budworm Ecology and Absolute Population Density Estimation by Jacques Régnière, Chris J. Sanders

“…Equations were developed to predict the total surface area and weight of foliage as well as number of buds in the live crown for estimation of absolute population density of spruce budworm. These equations use diameter at breast height (DBH) and the number of nodes in the live crown as predictors. …”
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Trends and analysing the correlation of population density and percentage of population suffered from COVID-19 - A linear regression model by Kamlesh Garg, Aarushi Mathur, Surinder Kumar, Ruchika Nandha

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Agro-economic viability from two croppings of broadleaf vegetables intercropped with beet fertilized with roostertree in different population densities by Francisco Cicupira de Andrade Filho, Eliane Queiroga de Oliveira, Jailma Suerda Silva de Lima, Joserlan Nonato Moreira, Ítalo Nunes Silva, Hamurábi Anizio Lins, Arthur Bernardes Cecílio Filho, Aurélio Paes Barros Júnior, Francisco Bezerra Neto

“…Population density is an important production factor for obtaining of agro-economic returns. …”
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Quantification of Wide-Area Norwegian Spring-Spawning Herring Population Density with Ocean Acoustic Waveguide Remote Sensing (OAWRS) by Duane, Daniel, Godo, Olav Rune, Makris, Nicholas

“…Ocean Acoustic Waveguide Remote Sensing (OAWRS) was used to instantaneously measure the areal population density of Norwegian herring over more than one thousand square kilometers in spawning grounds near Ålesund, Norway. …”
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Analyzing urban population density gradient of Dhaka Metropolitan Area using Geographic Information Systems (GIS) and Census Data by Khatun, Hafiza, Falgunee, Nishat, Kutub, Md. Juel Rana

“…GIS-based surface modeling using density contours shows the spatial pattern of population density has changed substantially. The study further corroborates that historical as well as economic factors are influencing the pattern and change of population density in Dhaka Metropolitan Area (DMA).…”
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Distribution and population density of Tarsius bancanus borneanus in secondary and rehabilitated forests of Universiti Putra Malaysia Bintulu Sarawak campus by Muhd Sahimi, Hani Nabilia, Chubo, John Keen, Saripuddin, Noor Bahiah, Mohd Top @ Mohd Tah, Marina

“…Through observations and capture-effort sampling covering an area of 18.75 ha secondary forest patches and 7.13 ha of rehabilitated forest, a total of 13 tarsier were captured using mist nets, three were recorded through observation and one tarsier recaptured. The population density of tarsiers in the secondary forest was 0.75 individuals per ha while 0.28 individuals per ha was recorded for the rehabilitated forest. …”
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The landscape configuration of zoonotic transmission of Ebola virus disease in West and Central Africa: interaction between population density and vegetation cover by Michael G. Walsh, MA Haseeb

“…Population density was strongly associated with spillover; however, there was significant interaction between population density and green vegetation cover. …”
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Mammal population density estimation using camera traps based on a random encounter model: theoretical basis and practical recommendations by Sergey S. Ogurtsov

“…The majority of methods for population density estimation using camera traps are focused on individually marked species. …”
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