The impact of bush-rock removal on an endangered snake species, Hoplocephalus bungaroides (Serpentes : Elapidae)

1998 ◽  
Vol 25 (3) ◽  
pp. 285 ◽  
Author(s):  
Richard Shine ◽  
Jonathan K. Webb ◽  
Mark Fitzgerald ◽  
Joanna Sumner
Keyword(s):  
Path Analysis ◽  
Survey Data ◽  
Anthropogenic Disturbance ◽  
Prey Species ◽  
Habitat Degradation ◽  
Population Densities ◽  
Snake Species ◽  
Eastern Australia ◽  
The Impact ◽  
Capture Rates

We examined the impact of habitat degradation (removal of surface rocks) on an endangered snake species (Hoplocephalus bungaroides, Elapidae) at 23 sites in south-eastern Australia, by quantifying the impact of rock removal on (i) the availability of suitable shelter-sites for the snakes and their major prey species (the velvet gecko, Oedura lesueurii), and (ii) the numbers of snakes and geckos. Our survey showed that both the snakes and the geckos prefer rocks lying on other rocks, rather than on soil, and select rocks of particular sizes. The rocks removed by bush-rock collectors overlap considerably in size (diameter and thickness) and substrate (rock on rock) with those used by broad-headed snakes and velvet geckos. Multivariate path analysis suggests that population densities of broad-headed snakes (as measured by capture rates) may be determined primarily by gecko numbers, which in turn depend upon availability of suitable rocks. In some sites, rock numbers were substantially reduced by anthropogenic disturbance. Thus, our survey data suggest that bush-rock removal has contributed to the endangerment of H. bungaroides.

scholarly journals A skink out of water: impacts of anthropogenic disturbance on an Endangered reptile in Australian highland swamps

Oryx ◽  
2016 ◽  
Vol 51 (4) ◽  
pp. 610-618 ◽  
Author(s):  
Sarsha Gorissen ◽  
Matthew Greenlees ◽  
Richard Shine
Keyword(s):  
Surface Water ◽  
Anthropogenic Disturbance ◽  
Longwall Mining ◽  
Habitat Degradation ◽  
Surface Water Chemistry ◽  
Fragmented Habitat ◽  
Blue Mountains ◽  
Eastern Australia ◽  
Dead Vegetation ◽  
The Impact

AbstractThe Blue Mountains water skink Eulamprus leuraensis is an Endangered swamp specialist known from < 60 sites and restricted to the rare, threatened and fragmented habitat of Temperate Highland Peat Swamps on Sandstone. Understanding the species’ ecology, notably its vulnerability to threatening processes such as hydrological disturbance, is essential if we are to retain viable populations of this Endangered reptile. We examined the impact of anthropogenic disturbance (longwall mining practices, development (industrial, urban, infrastructural) and damage by recreational vehicles) on this species, other herpetofauna and the swamp by surveying six paired undisturbed and disturbed sites in south-eastern Australia. The abundance of E. leuraensis was severely affected by disturbance. The species was absent from disturbed swamps, where it was replaced by its congener E. heatwolei and other woodland reptile species. Disturbance was associated with a halving of soil moisture content and a loss of surface water; the dense, live understorey was replaced by a sparser, drier habitat with dead vegetation, logs, rocks and bare ground. In effect, disturbance eliminated the distinctive features of the swamp habitat, transforming it into an area that resembled the surrounding habitat in terms of fauna, flora and physical characteristics. Our surveys suggest that hydrological disturbance (groundwater loss or alterations in surface water chemistry) extirpates E. leuraensis. This species' dependence on groundwater renders it sensitive to habitat degradation through hydrological disturbance. The conservation message for management authorities is clear: to protect the skink, protect the habitat.

Living with the enemy: a threatened prey species coexisting with feral cats on a fox-free island

2020 ◽  
Vol 47 (8) ◽  
pp. 633
Author(s):  
Vivianna Miritis ◽  
Anthony R. Rendall ◽  
Tim S. Doherty ◽  
Amy L. Coetsee ◽  
Euan G. Ritchie
Keyword(s):  
Native Species ◽  
Prey Species ◽  
Occupancy Models ◽  
Feral Cat ◽  
Terrestrial Mammals ◽  
Invasive Predators ◽  
Eastern Australia ◽  
Conservation Actions ◽  
Temporal Interactions ◽  
The Impact

Abstract ContextFeral domestic cats (Felis catus) have contributed to substantial loss of Australian wildlife, particularly small- and medium-sized terrestrial mammals. However, mitigating cat impacts remains challenging. Understanding the factors that facilitate coexistence between native prey and their alien predators could aid better pest management and conservation actions. AimsWe estimated feral cat density, examined the impact of habitat cover on long-nosed potoroos (Potorous tridactylus tridactylus), and assessed the spatial and temporal interactions between cats and potoroos in the ‘Bluegums’ area of French Island, south-eastern Australia. Materials and methodsWe operated 31 camera stations across Bluegums for 99 consecutive nights in each of winter 2018 and summer 2018/19. We used a spatially explicit capture–recapture model to estimate cat density, and two-species single-season occupancy models to assess spatial co-occurrence of cats and potoroos. We assessed the influence of vegetation cover and cat activity on potoroo activity by using a dynamic occupancy model. We also used image timestamps to describe and compare the temporal activities of the two species. Key resultsBluegums had a density of 0.77 cats per km2 across both seasons, although this is a conservative estimate because of the presence of unidentified cats. Cats and long-nosed potoroos were detected at 94% and 77% of camera stations, respectively. Long-nosed potoroo detectability was higher in denser vegetation and this pattern was stronger at sites with high cat activity. Cats and potoroos overlapped in their temporal activity, but their peak activity times differed. Conclusions Feral cat density at Bluegums, French Island, is higher than has been reported for mainland Australian sites, but generally lower than in other islands. Long-nosed potoroos were positively associated with cats, potentially indicating cats tracking potoroos as prey or other prey species that co-occur with potoroos. Temporal activity of each species differed, and potoroos sought more complex habitat, highlighting possible mechanisms potoroos may use to reduce their predation risk when co-occurring with cats. ImplicationsOur study highlighted how predator and prey spatial and temporal interactions, and habitat cover and complexity (ecological refuges), may influence the ability for native prey to coexist with invasive predators. We encourage more consideration and investigation of these factors, with the aim of facilitating more native species to persist with invasive predators or be reintroduced outside of predator-free sanctuaries, exclosures and island safe havens.

Materialism and Green Purchase Intention: A Study of Urban Vietnamese Consumers

2017 ◽  
pp. 89-106 ◽  
Author(s):  
Mai Nguyen Thi Tuyet ◽  
Hung Nguyen Vu ◽  
Linh Nguyen Hoang ◽  
Minh Nguyen Hoang
Keyword(s):  
Conceptual Framework ◽  
Survey Data ◽  
Purchase Intention ◽  
Behavioral Control ◽  
Subjective Norm ◽  
Perceived Behavioral Control ◽  
Policy Makers ◽  
Tpb Model ◽  
Research Findings ◽  
The Impact

This study focuses on examining the impact of three components of materialism on green purchase intention for urban consumers in Vietnam, an emerging economy. An extended Theory of Planned Behavior (TPB) is applied as the conceptual framework for this study. The hypotheses are empirically tested using survey data obtained from consumers in Hanoi, the capital of Vietnam. The regression results show support for most of our hypotheses. The findings indicate that two out of three facets of materialism are significant predictors of green purchase intention. Specifically, success is found to be negatively related to purchase intention, while happiness is related positively to the intention. All three antecedents in the TPB model, including attitude towards green purchase, subjective norm, and perceived behavioral control are also found to have positive impacts on purchase intention. The research findings are discussed and implications for managers and policy makers are provided.

A Study On Impact Of Work Life Related Factors On Employee Engagement In Health Care Sector Workers In Dindigul District.

2019 ◽  
Vol 118 (7) ◽  
pp. 20-26
Author(s):  
S. JAYARAMAN ◽  
R. Sindhya ◽  
P. Vijiyalakshmi
Keyword(s):  
Health Care ◽  
Path Analysis ◽  
Employee Engagement ◽  
Health Care Workers ◽  
Health Care Sector ◽  
Work Life ◽  
Primary Data ◽  
Related Factors ◽  
Care Workers ◽  
The Impact

this research aims to find out the intensity of Employee Engagement of the health care sector workers and the relationship between the Work life factors and Employee Engagement of Health care sector workers in Dindigul District. Primary data were used in this research, were collected from 298 Health care workers from Dindigul District. Questionnaire was the major tool used to gather the primary data from the selected sample respondents. For this purpose, a well structured questionnaire was constructed with the help of professionals and the practiced employees of various health care units in Dindigul District. The health care employees were chosen by simple random sampling method. The investigative measures of regression Path analysis, and simple percentage analysis were utilized to find the impact of work life related factors with the Employee Engagement. The maximum Health care workers were generally satisfied with their jobs. The analytical procedure of path analysis multiple regressions was utilized to determine the predicting strength among Work life factors and the employee engagement. This study provides an another view about the importance of Work life factors and Employee engagement for organizational effectiveness and performance .

Pengaruh Employee Engagement dan Employee Value Proposition terhadap Kinerja

2020 ◽  
Vol 13 (2) ◽  
Author(s):  
Murti Sumarni
Keyword(s):  
Regression Analysis ◽  
Path Analysis ◽  
Employee Engagement ◽  
Reliability And Validity ◽  
Value Proposition ◽  
Validity Test ◽  
Employee Value ◽  
Branch Office ◽  
The Impact ◽  
Research Analysis

The aim of this research was focused to determine the impact of Employee Engagement and Employee Value Proposition to Performance. The reliability and validity test was conducted to 30 respondents and the result showed that all questions item were proven valid and reliable to be used in further research analysis. Populations in this research were the employees of PT. Bank Mega, Tbk. Branch Office Semarang. Questionnaire wasused to collect the data in the amount of 50 respondents. This research used SPSS to analyze and the result of the regression analysis indicated that the Employee Engagement and Employee Value Proposition had a significant effect to Performance. The result of Path Analysis indicated that Employee Value Proposition could be a moderating variable between the impact of Employee Engagement to Performance.

Taking Aim at Attack Advertising

2019 ◽  
Author(s):  
Kim Fridkin ◽  
Patrick Kenney
Keyword(s):  
Content Analysis ◽  
Focus Groups ◽  
Survey Data ◽  
Data Sources ◽  
Empirical Validation ◽  
Negative Campaigning ◽  
Senate Elections ◽  
Campaign Messages ◽  
Negative Messages ◽  
The Impact

This book develops and tests the “tolerance and tactics theory of negativity.” The theory argues that citizens differ in their tolerance of negative campaigning. Also, candidates vary in the tactics used to attack their opponents, with negative messages varying in their relevance to voters and in the civility of their tone. The interplay between citizens’ tolerance of negativity and candidates’ negative messages helps clarify when negative campaigning will influence citizens’ evaluations of candidates and their likelihood of voting. A diverse set of data sources was collected from U.S. Senate elections (e.g., survey data, experiments, content analysis, focus groups) across several years to test the theory. The tolerance and tactics theory of negativity receives strong empirical validation. First, people differ systematically in their tolerance for negativity, and their tolerance changes over the course of the campaign. Second, people’s levels of tolerance consistently and powerfully influence how they assess negative messages. Third, the relevance and civility of negative messages consistently influence citizens’ assessments of candidates competing for office. That is, negative messages focusing on relevant topics and utilizing an uncivil tone produce significant changes in people’s impressions of the candidates. Furthermore, people’s tolerance of negativity influences their susceptibility to negative campaigning. Specifically, relevant and uncivil messages are most influential for people who are least tolerant of negative campaigning. The relevance and civility of campaign messages also alter people’s likelihood of voting, and the impact of negative messages on turnout is more consequential for people with less tolerance of negativity.

Chasing the phantom: biogeography and conservation of Vipera latastei-monticola in the Maghreb (North Africa)

2018 ◽  
Vol 39 (2) ◽  
pp. 145-161 ◽  
Author(s):  
Inês Freitas ◽  
Soumia Fahd ◽  
Guillermo Velo-Antón ◽  
Fernando Martínez-Freiría
Keyword(s):  
North Africa ◽  
Habitat Degradation ◽  
Conservation Status ◽  
Western Mediterranean ◽  
Niche Modelling ◽  
Habitat Transformation ◽  
Mountain Ranges ◽  
Management Actions ◽  
Suitable Space ◽  
The Impact

Abstract The Maghreb region (North Africa) constitutes a major component of the Mediterranean Basin biodiversity hotspot. During the last centuries, a consistent human population growth has led to an unprecedented rate of habitat transformation and loss in the region and thus, threatening its biodiversity. The Western Mediterranean viper Vipera latastei-monticola inhabits humid and subhumid areas in the main mountain ranges of the Maghreb, facing such threatening factors; however, its elusive character and rarity hindered data collection for distinct biological purposes. Here, we study the biogeographical patterns and conservation status of the Maghrebian V. latastei-monticola resulting from recent sampling campaigns in Morocco and Tunisia. We update species distribution, and integrate phylogeographic and ecological niche modelling analyses at both species and lineage level to identify suitable areas, and to evaluate the impact of anthropogenic transformation and level of protection of their suitable space. We identified four highly divergent mitochondrial lineages, including a new lineage endemic to the Western High Atlas, with allopatric distributions and restricted to mountain ranges, supporting the role of mountains as past climatic refugia. Despite the remoteness of suitable areas, we report widespread habitat degradation and identify the low effectiveness of the current protected areas system in preserving the species and lineages range. Our study shows the urgent need to apply management actions for the long-term conservation of this vulnerable species and suggests a revaluation of the specific status of V. monticola, as these populations likely represent an ecotype of V. latastei.

scholarly journals The Impact of Managers and Network Interactions on the Integration of Circularity in Business Strategy

2021 ◽  
pp. 108602662199463
Author(s):  
Manon Eikelenboom ◽  
Gjalt de Jong
Keyword(s):  
The Netherlands ◽  
Survey Data ◽  
Empirical Research ◽  
Indirect Effect ◽  
Business Strategy ◽  
Business Processes ◽  
Core Business ◽  
Organizational Attributes ◽  
Positive Direct ◽  
The Impact

Integrating circularity in business strategy is difficult to achieve for companies as it requires impactful changes in core business processes. While research has focused on identifying key barriers, little is known about the organizational attributes that can assist businesses in integrating circularity in their strategies. The purpose of this study is to investigate the implications of organizational managers and network interactions for the integration of circularity in business strategy. Through using survey data from 627 SMEs (small- and medium-sized enterprises) in the Netherlands, this study shows that managers who interpret circularity as an opportunity can have a positive direct and indirect effect on the integration of circularity in a company’s strategy. The results furthermore highlight the importance of circular network interactions for the integration of circularity in business strategy. This article contributes to recent calls for more empirical research into the integration of circularity and offers relevant insights for companies aiming to integrate circularity.

Survey Data Quality in Analyzing Harmonized Indicators of Protest Behavior: A Survey Data Recycling Approach

2021 ◽  
pp. 000276422110216
Author(s):  
Kazimierz M. Slomczynski ◽  
Irina Tomescu-Dubrow ◽  
Ilona Wysmulek
Keyword(s):  
Data Processing ◽  
Data Quality ◽  
Survey Data ◽  
A Priori ◽  
Data Sets ◽  
New Approach ◽  
Survey Quality ◽  
Survey Error ◽  
Ex Post ◽  
The Impact

This article proposes a new approach to analyze protest participation measured in surveys of uneven quality. Because single international survey projects cover only a fraction of the world’s nations in specific periods, researchers increasingly turn to ex-post harmonization of different survey data sets not a priori designed as comparable. However, very few scholars systematically examine the impact of the survey data quality on substantive results. We argue that the variation in source data, especially deviations from standards of survey documentation, data processing, and computer files—proposed by methodologists of Total Survey Error, Survey Quality Monitoring, and Fitness for Intended Use—is important for analyzing protest behavior. In particular, we apply the Survey Data Recycling framework to investigate the extent to which indicators of attending demonstrations and signing petitions in 1,184 national survey projects are associated with measures of data quality, controlling for variability in the questionnaire items. We demonstrate that the null hypothesis of no impact of measures of survey quality on indicators of protest participation must be rejected. Measures of survey documentation, data processing, and computer records, taken together, explain over 5% of the intersurvey variance in the proportions of the populations attending demonstrations or signing petitions.

scholarly journals The Long-Term Impact of Different Offline Population Inclusion Strategies in Probability-Based Online Panels: Evidence From the German Internet Panel and the GESIS Panel

2021 ◽  
pp. 089443932098413
Author(s):  
Carina Cornesse ◽  
Ines Schaurer
Keyword(s):  
Survey Data ◽  
Positive Impact ◽  
Alternative Mode ◽  
Mail Surveys ◽  
Internet Users ◽  
Online Panels ◽  
Long Term Impact ◽  
The Impact ◽  
Postal Mail

While online panels offer numerous advantages, they are often criticized for excluding the offline population. Therefore, some probability-based online panels have developed offline population inclusion strategies. Two dominant approaches prevail: providing internet equipment and offering an alternative survey participation mode. We investigate the impact of these approaches on two probability-based online panels in Germany: the German Internet Panel, which provides members of the offline population with internet equipment, and the GESIS Panel, which offers members of the offline population to participate via postal mail surveys. In addition, we explore the impact of offering an alternative mode only to non-internet users versus also offering the alternative mode to internet users who are unwilling to provide survey data online. Albeit lower recruitment and/or panel wave participation probabilities among offliners than onliners, we find that including the offline population has a positive long-term impact on sample accuracy in both panels. In the GESIS Panel, the positive impact is particularly strong when offering the alternative participation mode to non-internet users and internet users who are unwilling to provide survey data online.

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