scholarly journals A model to estimate seabird field metabolic rates

2018 ◽  
Vol 14 (6) ◽  
pp. 20180190 ◽  
Author(s):  
Ruth E. Dunn ◽  
Craig R. White ◽  
Jonathan A. Green
Keyword(s):  
Breeding Season ◽  
Brood Size ◽  
Large Scale ◽  
Ecological Processes ◽  
Marine Systems ◽  
Field Metabolic Rates ◽  
Using Data ◽  
Free Ranging ◽  
Average Brood

For free-ranging animals, field metabolic rate (FMR) is the sum of their energy expenditure over a specified period. This quantity is a key component of ecological processes at every biological level. We applied a phylogenetically informed meta-analytical approach to identify the large-scale determinants of FMR in seabirds during the breeding season. Using data from 64 studies of energetics in 47 species, we created a model to estimate FMR for any seabird population. We found that FMR was positively influenced by body mass and colony latitude and that it increased throughout the breeding season from incubation to brood to crèche. FMR was not impacted by colony-relative predation pressure or species average brood size. Based on this model, we present an app through which users can generate estimates of FMR for any population of breeding seabird. We encourage the use of this app to complement behavioural studies and increase understanding of how energetic demands influence the role of seabirds as driving components of marine systems.

The role of connectivity in Australian conservation

2004 ◽  
Vol 10 (4) ◽  
pp. 266 ◽  
Author(s):  
M. E. Soulé ◽  
B. G. Mackey ◽  
H. F. Recher ◽  
J. E. Williams ◽  
J. C. Z. Woinarski ◽  
...  
Keyword(s):  
Large Scale ◽  
Biological Diversity ◽  
Ecological Resilience ◽  
Landscape Permeability ◽  
Conservation Assessment ◽  
Ecological Processes ◽  
Trophic Relations ◽  
Scientific Framework

The existing system of nature reserves in Australia is inadequate for the long-term conservation and restoration of native biological diversity because it fails to accommodate, among other elements, large scale and long-term ecological processes and change, including physical and biotic transport in the landscape. This paper is an overview of the connectivity elements that inform a scientific framework for significantly improving the prospects for the long-term conservation of Australia's biodiversity. The framework forms the basis for the WildCountry programme. This programme has identified connectivity at landscape, regional and continental scales as a critical component of an effective conservation system. Seven categories of ecological phenomena are reviewed that require landscape permeability and that must be considered when planning for the maintenance of biological diversity and ecological resilience in Australia: (1) trophic relations at regional scales; (2) animal migration, dispersal, and other large scale movements of individuals and propagules; (3) fire and other forms of disturbance at regional scales; (4) climate variability in space and time and human forced rapid climate change; (5) hydroecological relations and flows at all scales; (6) coastal zone fluxes of organisms, matter, and energy; and, (7) spatially-dependent evolutionary processes at all scales. Finally, we mention eight cross-cutting themes that further illuminate the interactions and implications of the seven connectivity-related phenomena for conservation assessment, planning, research, and management, and we suggest how the results might be applied by analysts, planners, scientists, and community conservationists.

Spatial pattern of invading Dendroctonus micans (Coleoptera: Scolytidae) populations in the United Kingdom

2003 ◽  
Vol 33 (4) ◽  
pp. 712-725 ◽  
Author(s):  
M Gilbert ◽  
N Fielding ◽  
H F Evans ◽  
J -C Grégoire
Keyword(s):  
Spatial Pattern ◽  
Large Scale ◽  
Spatial Regression ◽  
Regional Scale ◽  
Management Control ◽  
Control Measures ◽  
Spatial Gradient ◽  
Dendroctonus Micans ◽  
Ecological Processes ◽  
Using Data

The spatial pattern of Dendroctonus micans (Kug.) attacks on individual spruce stands was analysed at the regional scale in Britain using data collected between 1982 and 1984 by the British Forestry Commission. These survey data reflect at least 10 years of D. micans spread, in the absence of natural enemies and of pest management control measures. A large-scale spatial gradient in the attack density at the stand level was identified and modelled. The large-scale spatial trend model explained 31.3% of the variability, and divided the study area in three separate areas: a zone where the insect was well established and where attack density presented low variations, a transition zone where attack density sharply decreased, and a zone not yet colonized. Attack density was related to site and stand factors, and to landscape neighbourhood in a linear spatial regression model. The factors correlated to attack density and the spatial autocorrelation structure of remaining variability were found to vary according to the zones, reflecting the predominance of different ecological processes occurring in colonized and uncolonized areas. The shape and orientation of the large-scale spatial model was shown to be mostly influenced by the spatial distribution of early attacks.

scholarly journals Testing Negative: The Non-Consequences of COVID-19 on Mass Ideology

2021 ◽  
Author(s):  
Jack Blumenau ◽  
Timothy Hicks ◽  
Alan Jacobs ◽  
Scott Matthews ◽  
Tom O'Grady
Keyword(s):  
Large Scale ◽  
Role Of Government ◽  
Health Security ◽  
Demographic Groups ◽  
Policy Responses ◽  
Mass Ideology ◽  
Using Data ◽  
Ideological Change ◽  
Study Panel

Responding to COVID-19, governments implemented large-scale economic and social policies of unprecedented scale. This highlighted the state's capacity to guarantee economic and health security, and affected demographic groups that are less commonly beneficiaries of state support. We hypothesise that exposure to the pandemic and these policy responses caused change in attitudes to the role of government in the economy and redistribution. We test this expectation using data from the (2014–present) British Election Study panel, together with a unique panel survey fielded to existing BES respondents in April and September, 2020. We find virtually no evidence of any effect on ideological beliefs. Moreover, using a survey experiment, we find exposure to cues linking the pandemic to greater roles for government has no impact on ideological beliefs. We conclude that such elite rhetoric, even if it had been present in the field, would not have yielded ideological change.

scholarly journals Using Model Analysis to Unveil Hidden Patterns in Tropical Forest Structures

2021 ◽  
Vol 9 ◽  
Author(s):  
Nicolas Picard ◽  
Frédéric Mortier ◽  
Pierre Ploton ◽  
Jingjing Liang ◽  
Géraldine Derroire ◽  
...  
Keyword(s):  
Large Scale ◽  
Forest Disturbance ◽  
Null Model ◽  
Basal Area ◽  
Model Analysis ◽  
Tropical Rain Forests ◽  
Model Framework ◽  
Ecological Processes ◽  
Large Trees ◽  
Using Data

When ordinating plots of tropical rain forests using stand-level structural attributes such as biomass, basal area and the number of trees in different size classes, two patterns often emerge: a gradient from poorly to highly stocked plots and high positive correlations between biomass, basal area and the number of large trees. These patterns are inherited from the demographics (growth, mortality and recruitment) and size allometry of trees and tend to obscure other patterns, such as site differences among plots, that would be more informative for inferring ecological processes. Using data from 133 rain forest plots at nine sites for which site differences are known, we aimed to filter out these patterns in forest structural attributes to unveil a hidden pattern. Using a null model framework, we generated the anticipated pattern inherited from individual allometric patterns. We then evaluated deviations between the data (observations) and predictions of the null model. Ordination of the deviations revealed site differences that were not evident in the ordination of observations. These sites differences could be related to different histories of large-scale forest disturbance. By filtering out patterns inherited from individuals, our model analysis provides more information on ecological processes.

scholarly journals Understanding Consumer Attitudes Toward Web-based Communication Tools

2016 ◽  
Vol 8 (3) ◽  
pp. 1
Author(s):  
Raghu Kurthakoti ◽  
Siva K. Balasubramanian ◽  
John H. Summey
Keyword(s):  
Structural Equation ◽  
Large Scale ◽  
Viral Marketing ◽  
Equation Modeling ◽  
Future Research ◽  
Web Based ◽  
Survey Results ◽  
Using Data ◽  
Behavior Domain

<p>Motivated by the growing role of online transactions and Web-related Word-Of-Mouth (WWOM) in the consumer behavior domain, we propose a theoretical model that relates two antecedents (consumers’ community and content ownership) to attitudes toward four WWOM tools (Viral Marketing, Consumer-Produced Ads, Consumer Web Logs, and Collaborative Filters). The model and related hypotheses are empirically tested with the structural equation modeling (SEM) approach, using data from a large-scale survey. Results validated most of the proposed hypotheses and generated new insights. For example, we found that the direct relation between consumers’ community and their attitude toward blogs was completely mediated by their sense of content ownership. Finally, we delineate the limitations of the study and outline directions for future research.</p>

The Role of Sense of Direction and Other Factors During Navigation in a Large-Scale, Unconstrained Environment

2013 ◽  
Author(s):  
Elisabeth J. Ploran ◽  
Ericka Rovira ◽  
James C. Thompson ◽  
Raja Parasuraman
Keyword(s):  
Large Scale ◽  
Sense Of Direction

INOVASI PEMBELAJARAN AKIDAH AKHLAK MENGGUNAKAN METODE ROLE PLAY DALAM MENINGKATKAN PRESTASI BELAJAR SISWA

2018 ◽  
Vol 2 (1) ◽  
pp. 52-63
Author(s):  
Ansori Ansori
Keyword(s):  
Data Reduction ◽  
Role Play ◽  
Learning Goals ◽  
New Paradigm ◽  
Learning Materials ◽  
Analysis Technique ◽  
Flexible Schedule ◽  
Using Data ◽  
Real Action

The use of various methods will greatly help students in achieving learning goals. As role play method is one way mastery of learning materials through the development of imagination and appreciation of students on learning materials. Data collection techniques in this study are observation, interviews, and documentation. To analyze the data in this research using data analysis technique of Miles and Huberman model that is data reduction (Data Reduction), data presentation (Data Display) and conclusion (Conclution Drawing / verification) The findings in this research is innovation of role play method can change paradigm to the new paradigm so that the role of the teacher is more as a facilitator, counselor, consultant, and comrade study Flexible schedule, open as needed Learning directed by students themselves Problem-based, project, real world, real action, and reflection Design and investigation. Computers as tools, and dynamic media presentations.

Magnetic Properties of xCeO2•(50 − x) PbO•50B2O3 Glasses and Glass Ceramics

2017 ◽  
Vol 13 (1) ◽  
pp. 4486-4494 ◽  
Author(s):  
G.El Damrawi ◽  
F. Gharghar
Keyword(s):  
Magnetic Properties ◽  
Large Scale ◽  
Glass Ceramics ◽  
Magnetic Behavior ◽  
Crystal Formation ◽  
Dual Roles ◽  
Effective Agent ◽  
Ordered Structures ◽  
Essential Change

Cerium oxide in borate glasses of composition xCeO2·(50 − x)PbO·50B2O3 plays an important role in changing both microstructure and magnetic behaviors of the system. The structural role of CeO2 as an effective agent for cluster and crystal formation in borate network is clearly evidenced by XRD technique. Both structure and size of well-formed cerium separated clusters have an effective influence on the structural properties. The cluster aggregations are documented to be found in different range ordered structures, intermediate and long range orders are the most structures in which cerium phases are involved. The nano-sized crystallized cerium species in lead borate phase are evidenced to have magnetic behavior.  The criteria of building new specific borate phase enriched with cerium as ferrimagnetism has been found to keep the magnetization in large scale even at extremely high temperature. Treating the glass thermally or exposing it to an effective dose of ionized radiation is evidenced to have an essential change in magnetic properties. Thermal heat treatment for some of investigated materials is observed to play dual roles in the glass matrix. It can not only enhance alignment processes of the magnetic moment but also increases the capacity of the crystallite species in the magnetic phases. On the other hand, reverse processes are remarked under the effect of irradiation. The magnetization was found to be lowered, since several types of the trap centers which are regarded as defective states can be produced by effect of ionized radiation. 

The Impact of Quantitative Easing on Emerging Markets – Literature Review

e-Finanse ◽  
2018 ◽  
Vol 14 (4) ◽  
pp. 67-76
Author(s):  
Piotr Bartkiewicz
Keyword(s):  
Emerging Markets ◽  
Large Scale ◽  
Empirical Literature ◽  
Quantitative Easing ◽  
Methodological Choices ◽  
The Subject ◽  
Methodological Approaches ◽  
The Impact ◽  
Sufficient Precision

AbstractThe article presents the results of the review of the empirical literature regarding the impact of quantitative easing (QE) on emerging markets (EMs). The subject is of interest to policymakers and researchers due to the increasingly larger role of EMs in the world economy and the large-scale capital flows occurring after 2009. The review is conducted in a systematic manner and takes into consideration different methodological choices, samples and measurement issues. The paper puts the summarized results in the context of transmission channels identified in the literature. There are few distinct methodological approaches present in the literature. While there is a consensus regarding the direction of the impact of QE on EMs, its size and durability have not yet been assessed with sufficient precision. In addition, there are clear gaps in the empirical findings, not least related to relative underrepresentation of the CEE region (in particular, Poland).

The role of corporate investment in social responsible practices in the promotion of employees’ organizational citizenship behaviour

2014 ◽  
Author(s):  
Ana Patrícia Duarte ◽  
José Gonçalves das Neves
Keyword(s):  
Job Satisfaction ◽  
Organizational Citizenship ◽  
Economic Uncertainty ◽  
Socially Responsible ◽  
Organizational Survival ◽  
Current Scenario ◽  
Reducing Costs ◽  
Using Data ◽  
Airline Company

In the current scenario of economic uncertainty, where many organizations struggle harder for reducing costs while improving their competitiveness, employees’ organizational citizenship behaviours might have an enhanced importance for organizational survival and success. A model proposing that corporate engagement in internal socially responsible practices enhances employees’ job satisfaction and consequently increases employees’ extra-role behaviours was tested. Using data obtained from a sample of employees from an airline company (n=133), the model was examined and supported. We have therefore concluded that organizations may foster employees’ extra-role behaviours by investing in corporate socially responsible practices that signal corporate concern with employees and promote job satisfaction.

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