scholarly journals The queen of the island: On the density and distribution of the Eurasian Collared-Dove (Streptopelia decaocto) in Cozumel

2021 ◽  
Author(s):  
Michelle García-Arroyo ◽  
Miguel A. Gómez-Martínez ◽  
Ian MacGregor-Fors
Keyword(s):  
Generalized Linear Model ◽  
Native Species ◽  
Bird Species ◽  
Urban Setting ◽  
Tree Cover ◽  
Human Beings ◽  
Distance Weighting ◽  
Nest Usurpation ◽  
The Relationship ◽  
Inverse Distance

AbstractThe Eurasian Collared-Dove (Streptopelia decaocto) is one of the most successful invasive bird species across the world. Worryingly, the invasive dove is a known reservoir of many diseases, some of which can potentially infect mammals (including human beings). Additionally, aggressive behaviors have been recorded toward other bird species resulting in territory and nest usurpation. Thus, the presence of this species poses an important risk for native species with similar habits, particularly in insular systems. Based on this, we carried out this study to assess the density and distribution of the Eurasian Collared-Dove in the island of Cozumel, as well as to evaluate the relationship between their abundance and the environmental characteristics of the places they inhabit. We estimated their distance-corrected densities in the island's largest town and performed an inverse distance weighting (IDW) interpolation to visualize their distribution. We performed a generalized linear model (GLM) to assess relationships between the environmental variables and the abundance of doves using a reduced model procedure. We obtained 137 records of doves present in 94% of all survey sites and an estimated density of 6.8 ind/ha, for a total of 6,670 doves in San Miguel de Cozumel. We did not find a spatial pattern of the dove's distribution on the urban setting, but we found an interaction between their abundances with tree cover and building height. Our findings, together with previous evidence of infection risk and aggressive behavior, make this species a threat to the native species communities of fragile ecosystems such as the island of Cozumel.

How do fruit productivity, fruit traits and dietary specialization affect the role of birds in a mutualistic network?

2019 ◽  
Vol 35 (5) ◽  
pp. 213-222
Author(s):  
Marcia L. Malanotte ◽  
Tiago Machado-de-Souza ◽  
Ricardo P. Campos ◽  
Carmen L.O. Petkowicz ◽  
Isabela G. Varassin
Keyword(s):  
Atlantic Forest ◽  
Generalized Linear Model ◽  
Plant Traits ◽  
Bird Species ◽  
Fruit Traits ◽  
Dietary Specialization ◽  
Fruit Productivity ◽  
Relationship Of ◽  
The Relationship

AbstractMany plant traits might explain the different ecological and network roles of fruit-eating birds. We assessed the relationship of plant productivity, fruit traits (colour, seed size and nutritional quality) and dietary specialization, with the network roles of fruit-eating birds (number of partners, centrality and selectivity) in the Atlantic Forest, Brazil. We classified bird species according to their dietary specialization into three categories: obligate, partial and opportunistic fruit-eating birds. To test if network roles changed according to dietary specialization, fruit productivity and traits, we used a generalized linear model analysis. The selected 14 species of plant interacted with 52 bird species, which consumed 2199 fruits. The most central and generalist fruit-eating bird, Turdus albicolis, interacted with plants that produced more fruits, such as Miconia cinerascens, and had, on average, larger seeds, such as Myrcia splendens. The most selective birds interacted with fruits with a higher concentration of lipids and less intense colour, and plants that produced fewer fruits. Obligate fruit-eating birds, such as Patagioenas plumbea, were more selective than partial and opportunistic birds. Different plant traits are therefore related to the different network roles of fruit-eating birds in the Atlantic Forest, which are also dependent on bird dietary specialization.

scholarly journals Real-Time Slope Stability Analysis Utilizing High-Resolution Gridded Precipitation Datasets Based on Spatial Interpolation of Measurements at Scattered Weather Station

2021 ◽  
Vol 16 (4) ◽  
pp. 561-570
Author(s):  
Nanaha Kitamura ◽  
Akino Watanabe ◽  
Akihiko Wakai ◽  
Takatsugu Ozaki ◽  
Go Sato ◽  
...  
Keyword(s):  
Real Time ◽  
Groundwater Level ◽  
Rainfall Intensity ◽  
Rain Gauge ◽  
Wide Area ◽  
Observation Data ◽  
Time Simulation ◽  
Distance Weighting ◽  
The Relationship ◽  
Inverse Distance

Measuring the amount of rainfall is essential for a wide-area evaluation of the risk of landslide disaster using a real-time simulation. In Thailand, located in Monsoon Asia, point observation is conducted using a rain gauge. Interpolation calculation is crucial for obtaining the planar rainfall intensity for the wide-area analysis from scattered point observation data. In this study, to accurately calculate rainfall intensity using the inverse distance weighting (IDW) method, the parameters affecting the results are examined. Additionally, using obtained rainfall data, a simple prediction calculation of groundwater level fluctuation by Wakai et al. [1] and Ozaki et al. [2] is performed. Finally, the relationship between the rainfall intensity and the fluctuation of groundwater level will be discussed.

scholarly journals Distribution and conservation of three important bird groups of the Atlantic Forest in north-east Brazil

2016 ◽  
Vol 76 (4) ◽  
pp. 1004-1020 ◽  
Author(s):  
G. A. Pereira ◽  
H. F. P. Araújo ◽  
S. M. Azevedo-Júnior
Keyword(s):  
Atlantic Forest ◽  
Forest Cover ◽  
Interpolation Method ◽  
Bird Species ◽  
Forest Fragments ◽  
Fragmented Forest ◽  
North East ◽  
Vegetation Heterogeneity ◽  
Distance Weighting ◽  
Inverse Distance

Abstract The Pernambuco Endemism Center in north-east Brazil has the most fragmented forest cover and the largest number of threatened birds of the whole Atlantic Forest. We analyzed the distribution of three groups of bird species: forest-dependent, endemic and/or threatened using the interpolation method of Inverse Distance Weighting. We also checked the concentration of these birds in protected and unprotected areas, suggesting new sites that need to be protected. The richness concentration of forest-dependent, endemic and/or threatened birds in 123 sites were analysed. There was a greater concentration of the three groups in north Alagoas, south and north Pernambuco, and north and west Paraíba. The distribution of the three groups was almost regular in different vegetation types, although a lower concentration was found in the pioneer formation. There was a greater concentration of birds from all three groups between Pernambuco and Alagoas, and this must be due to the presence of more forest fragments with better structure and vegetation heterogeneity. The protected and unprotected areas hosted important records of endemic and/or threatened birds. We suggested some important places for implementation of new protected areas due to the larger concentrations of the target birds and because they are located within the boundaries of the Important Bird Areas.

Dehumanization and Mentalizing Animals

2017 ◽  
Author(s):  
T.J. Kasperbauer
Keyword(s):  
Moral Psychology ◽  
Mental State ◽  
Moral Status ◽  
Mental States ◽  
Psychological Research ◽  
Human Beings ◽  
Mental State Attribution ◽  
The Relationship ◽  
Phenomenal States

This chapter applies the psychological account from chapter 3 on how we rank human beings above other animals, to the particular case of using mental states to assign animals moral status. Experiments on the psychology of mental state attribution are discussed, focusing on their implications for human moral psychology. The chapter argues that attributions of phenomenal states, like emotions, drive our assignments of moral status. It also describes how this is significantly impacted by the process of dehumanization. Psychological research on anthropocentrism and using animals as food and as companions is discussed in order to illuminate the relationship between dehumanization and mental state attribution.

Fellow Creatures

2018 ◽  
Author(s):  
Christine M. Korsgaard
Keyword(s):  
The Other ◽  
Moral Standing ◽  
Human Beings ◽  
Good For ◽  
Treat All ◽  
The Right ◽  
The Relationship

This book argues that we are obligated to treat all sentient animals as “ends in themselves.” Drawing on a theory of the good derived from Aristotle, it offers an explanation of why animals are the sorts of beings who have a good. Drawing on a revised version of Kant’s argument for the value of humanity, it argues that rationality commits us to claiming the standing of ends in ourselves in two senses. As autonomous beings, we claim to be ends in ourselves when we claim the standing to make laws for ourselves and each other. As beings who have a good, we also claim to be ends in ourselves when we take the things that are good for us to be good absolutely and so worthy of pursuit. The first claim commits us to joining with other autonomous beings in relations of reciprocal moral lawmaking. The second claim commits us to treating the good of every sentient animal as something of absolute importance. The book also argues that human beings are not more important than, superior to, or better off than the other animals. It criticizes the “marginal cases” argument and advances a view of moral standing as attaching to the atemporal subjects of lives. It offers a non-utilitarian account of the relationship between the good and pleasure, and addresses questions about the badness of extinction and about whether we have the right to eat animals, experiment on them, make them work for us, and keep them as pets.

Religion and Toleration from the Enlightenment to the Post-Secular Era

2017 ◽  
Author(s):  
Rainer Forst
Keyword(s):  
Immanuel Kant ◽  
Recent Work ◽  
Common Ground ◽  
Fundamental Question ◽  
Modern World ◽  
Human Beings ◽  
Human Reason ◽  
The Enlightenment ◽  
Pierre Bayle ◽  
The Relationship

This chapter addresses the classical question of the relationship between enlightenment and religion. In doing so, the chapter compares Jürgen Habermas's thought to that of Pierre Bayle and Immanuel Kant. For, although Habermas undoubtedly stands in a tradition founded by Bayle and Kant, he develops a number of important orientations within this tradition and has changed his position in his recent work. The chapter studies this change to understand Habermas's position better. It also draws attention to a fundamental question raised by the modern world: what common ground can human reason establish in the practical and theoretical domain between human beings who are divided by profoundly different religious (including antireligious) views?

scholarly journals Domain randomization-enhanced deep learning models for bird detection

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xin Mao ◽  
Jun Kang Chow ◽  
Pin Siang Tan ◽  
Kuan-fu Liu ◽  
Jimmy Wu ◽  
...  
Keyword(s):  
Deep Learning ◽  
Continuous Monitoring ◽  
Bird Species ◽  
Training Data ◽  
Learning Models ◽  
Fine Grained ◽  
Bird Detection ◽  
Relationship Of ◽  
The Relationship

AbstractAutomatic bird detection in ornithological analyses is limited by the accuracy of existing models, due to the lack of training data and the difficulties in extracting the fine-grained features required to distinguish bird species. Here we apply the domain randomization strategy to enhance the accuracy of the deep learning models in bird detection. Trained with virtual birds of sufficient variations in different environments, the model tends to focus on the fine-grained features of birds and achieves higher accuracies. Based on the 100 terabytes of 2-month continuous monitoring data of egrets, our results cover the findings using conventional manual observations, e.g., vertical stratification of egrets according to body size, and also open up opportunities of long-term bird surveys requiring intensive monitoring that is impractical using conventional methods, e.g., the weather influences on egrets, and the relationship of the migration schedules between the great egrets and little egrets.

scholarly journals A Multimethod Analysis for Average Annual Precipitation Mapping in the Khorasan Razavi Province (Northeastern Iran)

Atmosphere ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 592
Author(s):  
Mehdi Aalijahan ◽  
Azra Khosravichenar
Keyword(s):  
Regional Planning ◽  
Interpolation Method ◽  
Absolute Error ◽  
Rain Gauge ◽  
Annual Precipitation ◽  
Coefficient Of Determination ◽  
Distance Weighting ◽  
Average Annual Precipitation ◽  
Inverse Distance

The spatial distribution of precipitation is one of the most important climatic variables used in geographic and environmental studies. However, when there is a lack of full coverage of meteorological stations, precipitation estimations are necessary to interpolate precipitation for larger areas. The purpose of this research was to find the best interpolation method for precipitation mapping in the partly densely populated Khorasan Razavi province of northeastern Iran. To achieve this, we compared five methods by applying average precipitation data from 97 rain gauge stations in that province for a period of 20 years (1994–2014): Inverse Distance Weighting, Radial Basis Functions (Completely Regularized Spline, Spline with Tension, Multiquadric, Inverse Multiquadric, Thin Plate Spline), Kriging (Simple, Ordinary, Universal), Co-Kriging (Simple, Ordinary, Universal) with an auxiliary elevation parameter, and non-linear Regression. Root Mean Square Error (RMSE), Mean Absolute Error (MAE), and the Coefficient of Determination (R2) were used to determine the best-performing method of precipitation interpolation. Our study shows that Ordinary Co-Kriging with an auxiliary elevation parameter was the best method for determining the distribution of annual precipitation for this region, showing the highest coefficient of determination of 0.46% between estimated and observed values. Therefore, the application of this method of precipitation mapping would form a mandatory base for regional planning and policy making in the arid to semi-arid Khorasan Razavi province during the future.

scholarly journals Spatial Distribution of Soil Nutrients in Farmland in a Hilly Region of the Pearl River Delta in China Based on Geostatistics and the Inverse Distance Weighting Method

Agriculture ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 50
Author(s):  
Rumi Wang ◽  
Runyan Zou ◽  
Jianmei Liu ◽  
Luo Liu ◽  
Yueming Hu
Keyword(s):  
Spatial Distribution ◽  
Pearl River Delta ◽  
Pearl River ◽  
Weighting Method ◽  
Farmland Protection ◽  
The Pearl River Delta ◽  
Hilly Region ◽  
Distance Weighting ◽  
The Pearl River ◽  
Inverse Distance

Soil nutrients are essential factors that reflect farmland quality. Nitrogen, phosphorus, and potassium are essential elements for plants, while silicon is considered a “quasi-essential” element. This study investigated the spatial distribution of plant nutrients in soil in a hilly region of the Pearl River Delta in China. A total of 201 soil samples were collected from farmland topsoil (0–20 cm) for the analysis of total nitrogen (TN), available phosphorus (AP), available potassium (AK), and available silicon (ASi). The coefficients of variation ranged from 47.88% to 76.91%. The NSRs of TN, AP, AK, and ASi were 0.15, 0. 07, 0.12, and 0.13, respectively. The NSRs varied from 0.02 to 0.20. All variables exhibited weak spatial dependence (R2 < 0.5), except for TN (R2 = 0.701). After comparing the prediction accuracy of the different methods, we used the inverse distance weighting method to analyze the spatial distribution of plant nutrients in soil. The uniform spatial distribution of AK, TN overall showed a trend of increasing from northeast to southwest, and the overall spatial distribution of AP and ASi showed that the northeast was higher than the southwest. This study provides support for the delimitation of basic farmland protection areas, the formulation of land use spatial planning, and the formulation of accurate farmland protection policies.

scholarly journals Eight Simple Guidelines for Improved Understanding of Transformations and Nonlinear Effects

2021 ◽  
pp. 109442812199190
Author(s):  
Mikko Rönkkö ◽  
Eero Aalto ◽  
Henni Tenhunen ◽  
Miguel I. Aguirre-Urreta
Keyword(s):  
Generalized Linear Model ◽  
Functional Form ◽  
Nonlinear Models ◽  
Nonlinear Effects ◽  
Recent Past ◽  
Organizational Research ◽  
Common Practices ◽  
Individual Variables ◽  
The Individual ◽  
The Relationship

Transforming variables before analysis or applying a transformation as a part of a generalized linear model are common practices in organizational research. Several methodological articles addressing the topic, either directly or indirectly, have been published in the recent past. In this article, we point out a few misconceptions about transformations and propose a set of eight simple guidelines for addressing them. Our main argument is that transformations should not be chosen based on the nature or distribution of the individual variables but based on the functional form of the relationship between two or more variables that is expected from theory or discovered empirically. Building on a systematic review of six leading management journals, we point to several ways the specification and interpretation of nonlinear models can be improved.

Sign in / Sign up

Export Citation Format

Share Document