Fishing for Information: Quantitative Analytical Methods for Population and Community Assessments

2020 ◽  
Vol 4 (1) ◽  
pp. 1-12
Author(s):  
Taylor J. Senegal ◽  
Elizabeth A. Flaherty
Keyword(s):  
Quantitative Methods ◽  
Size Structure ◽  
Line Transect ◽  
Community Patterns ◽  
Multiple Sampling ◽  
Resource Managers ◽  
Abundance Estimates ◽  
Complex Models ◽  
Natural Resource Managers

Natural resource managers often use quantitative methods to characterize and manage ecosystems. A firm understanding of these methods, ranging from simple counts to complex models, is critical in conducting accurate population and community assessments. Students can gain an advantage in understanding these methods through early exposure and contextual examples. This fictional case study follows three American Fisheries Society club members who perform an ecological assessment of a landowner’s ponds. The club members use multiple sampling methods and analyses to answer the landowner’s questions. In this study, students are introduced to common assessment metrics, such as community patterns (richness, diversity, evenness, and similarity), abundance estimates (mark-recapture, depletion, swept-area, and line-transect), size structure (proportional stock density), and growth estimates (absolute, relative, and instantaneous growth rates; von Bertalanffy growth model). Students will also interpret results and identify physical or biological factors that may influence those results. After completing this case study, students will be able to describe the need for population and community assessments and apply these assessments to various scenarios.

Participatory Mapping in Browns Canyon National Monument, Colorado (USA)

2017 ◽  
Vol 1 (1) ◽  
pp. 1-16
Author(s):  
John Harner ◽  
Lee Cerveny ◽  
Rebecca Gronewold
Keyword(s):  
Land Management ◽  
Planning Process ◽  
Management Plan ◽  
Bureau Of Land Management ◽  
National Monument ◽  
Resource Managers ◽  
Different Types ◽  
Us Forest Service ◽  
Natural Resource Managers

Natural resource managers need up-to-date information about how people interact with public lands and the meanings these places hold for use in planning and decision-making. This case study explains the use of public participatory Geographic Information System (GIS) to generate and analyze spatial patterns of the uses and values people hold for the Browns Canyon National Monument in Colorado. Participants drew on maps and answered questions at both live community meetings and online sessions to develop a series of maps showing detailed responses to different types of resource uses and landscape values. Results can be disaggregated by interaction types, different meaningful values, respondent characteristics, seasonality, or frequency of visit. The study was a test for the Bureau of Land Management and US Forest Service, who jointly manage the monument as they prepare their land management plan. If the information generated is as helpful throughout the entire planning process as initial responses seem, this protocol could become a component of the Bureau’s planning tool kit.

scholarly journals Comparison of local knowledge and researcher-led observations for wildlife exploitation assessment and management

2020 ◽  
Vol 47 (4) ◽  
pp. 304-309
Author(s):  
Andrew J Temple ◽  
Selina M Stead ◽  
Edward Hind-Ozan ◽  
Narriman Jiddawi ◽  
Per Berggren
Keyword(s):  
Local Knowledge ◽  
Sustainable Management ◽  
Method Comparison ◽  
Resource Exploitation ◽  
Resource Managers ◽  
Spatiotemporal Scales ◽  
Natural Resource Managers ◽  
Rigorous Method ◽  
Annual Patterns

SummaryThe use of local knowledge observations to generate empirical wildlife resource exploitation data in data-poor, capacity-limited settings is increasing. Yet, there are few studies quantitatively examining their relationship with those made by researchers or natural resource managers. We present a case study comparing intra-annual patterns in effort and mobulid ray (Mobula spp.) catches derived from local knowledge and fisheries landings data at identical spatiotemporal scales in Zanzibar (Tanzania). The Bland–Altman approach to method comparison was used to quantify agreement, bias and precision between methods. Observations from the local knowledge of fishers and those led by researchers showed significant evidence of agreement, demonstrating the potential for local knowledge to act as a proxy, or complement, for researcher-led methods in assessing intra-annual patterns of wildlife resource exploitation. However, there was evidence of bias and low precision between methods, undermining any assumptions of equivalency. Our results underline the importance of considering bias and precision between methods as opposed to simply assessing agreement, as is commonplace in the literature. This case study demonstrates the value of rigorous method comparison in informing the appropriate use of outputs from different knowledge sources, thus facilitating the sustainable management of wildlife resources and the livelihoods of those reliant upon them.

Factors contributing to the longevity of the commercial use of crocodiles by Indigenous people in remote Northern Australia: a case study

2012 ◽  
Vol 34 (3) ◽  
pp. 239 ◽  
Author(s):  
B. J. Austin ◽  
B. Corey
Keyword(s):  
Economic Development ◽  
Indigenous People ◽  
Natural Resource ◽  
Sustainable Use ◽  
Indigenous Australians ◽  
Northern Australia ◽  
Structured Interviews ◽  
Resource Managers ◽  
Natural Resource Managers

Access to land and resources has not, in itself, been sufficient for improving the wellbeing of Indigenous people living in remote regions of Australia. Much of the land has limited potential for mainstream market-based economic development. However, some Indigenous Australians have been able to use wildlife commercially to realise economic opportunities and to enhance their capacity to engage in natural resource management on their land. In this paper, a case study is presented of one such enterprise which has managed a crocodile egg-harvesting operation from a remote township for almost 15 years. Using a sustainable livelihoods approach to conduct field observations and semi-structured interviews, key factors were identified that had contributed to the longevity of this operation. These were minimal anti-use sentiment, demonstrably sustainable harvests, the market, the institutional context, parent-organisation support, activating and enhancing capitals and capabilities, and locally relevant enterprise activity. The crocodile egg-harvesting activity investigated is an example of a community-governed natural resource-based enterprise that has been able to engage Indigenous people in market-based economic activity in remote northern Australia. The findings have potential value to Indigenous peoples and communities, development practitioners, policy-makers and natural resource managers interested in the sustainable use of wildlife and Indigenous economic development.

scholarly journals Bringing citizen monitoring into land management: a case study of the Bosque Ecosystem Monitoring Program

2016 ◽  
Vol 15 (03) ◽  
pp. A02 ◽  
Author(s):  
Rowan Converse ◽  
Daniel Shaw ◽  
Kim Eichhorst ◽  
May Leinhart
Keyword(s):  
Natural Resource ◽  
Monitoring Program ◽  
Rapid Expansion ◽  
Federal State ◽  
Ecosystem Monitoring ◽  
Resource Managers ◽  
Natural Resource Managers ◽  
Citizen Monitoring

Despite the rapid expansion of citizen-based monitoring, data from these programs remain underutilized by natural resource managers, perhaps due to quality and comparability issues. We present the Bosque Ecosystem Monitoring Program as a case study of an initiative successfully meeting long-term monitoring needs of federal, state, tribal, and local natural resource managers, and informing public policy. To maximize potential for partnerships with managers, we recommend the creation of a five-year plan including scientific goals and financial solvency strategies prior to establishing a citizen science program, and offering multiple platforms for data-sharing and dialogue.

Integration of Human/Social Dimensions into the Traditional European Model of Natural Resource Education and Management

2005 ◽  
Vol 156 (8) ◽  
pp. 264-268
Author(s):  
James J. Kennedy ◽  
Niels Elers Koch
Keyword(s):  
Natural Resources ◽  
Natural Resource ◽  
Life Forms ◽  
Western World ◽  
Social Dimensions ◽  
Roles And Responsibilities ◽  
Resource Managers ◽  
Natural Resource Managers ◽  
Rural Ecosystem ◽  
Professional Roles And Responsibilities

The increasing diversity, complexity and dynamics of ecosystem values and uses over the last 50 years requires new ways for natural resource managers (foresters, wildlife biologists, etc.)to understand and relate to their professional roles and responsibilities in accommodating urban and rural ecosystem users, and managing the complimentary and conflicting interactions between them. Three stages in Western-world natural resources management are identified and analyzed, beginning with the (1) Traditional stage: natural resources first, foremost and forever, to (2) Transitional stage: natural resource management,for better or worse, involves people, to (3) Relationship stage: managing natural resources for valued people and ecosystem relationships. The impacts of these three perspectives on how natural resource managers view and respond to ecosystems,people and other life-forms is basic and can be profound.

Application of failure mode and effects analysis to reduce microplastic emissions

2021 ◽  
pp. 0734242X2110031
Author(s):  
Ana Pires ◽  
Paula Sobral
Keyword(s):  
Failure Mode ◽  
Quantitative Methods ◽  
Policy Instruments ◽  
Effect Analysis ◽  
Advantages And Disadvantages ◽  
Heuristic Technique ◽  
Single Use ◽  
Regulatory Measures ◽  
Plastic Products

A complete understanding of the occurrence of microplastics and the methods to eliminate their sources is an urgent necessity to minimize the pollution caused by microplastics. The use of plastics in any form releases microplastics to the environment. Existing policy instruments are insufficient to address microplastics pollution and regulatory measures have focussed only on the microbeads and single-use plastics. Fees on the use of plastic products may possibly reduce their usage, but effective management of plastic products at their end-of-life is lacking. Therefore, in this study, the microplastic–failure mode and effect analysis (MP–FMEA) methodology, which is a semi-qualitative approach capable of identifying the causes and proposing solutions for the issue of microplastics pollution, has been proposed. The innovative feature of MP–FMEA is that it has a pre-defined failure mode, that is, the release of microplastics to air, water and soil (depending on the process) or the occurrence of microplastics in the final product. Moreover, a theoretical recycling plant case study was used to demonstrate the advantages and disadvantages of this method. The results revealed that MP–FMEA is an easy and heuristic technique to understand the failure-effect-causes and solutions for reduction of microplastics and can be applied by researchers working in different domains apart from those relating to microplastics. Future studies can include the evaluation of the use of MP–FMEA methodology along with quantitative methods for effective reduction in the release of microplastics.

scholarly journals Modeling Insights into Precipitation Deuterium Excess as an Indicator of Raindrop Evaporation in Lanzhou, China

Water ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 193
Author(s):  
Fenli Chen ◽  
Mingjun Zhang ◽  
Athanassios A. Argiriou ◽  
Shengjie Wang ◽  
Qian Ma ◽  
...  
Keyword(s):  
Arid Region ◽  
Quantitative Methods ◽  
Isotope Composition ◽  
Sampling Site ◽  
Western China ◽  
Cloud Base ◽  
Deuterium Excess ◽  
Semi Arid Region ◽  
Semi Arid

The deuterium excess in precipitation is an effective indicator to assess the existence of sub-cloud evaporation of raindrops. Based on the synchronous measurements of stable isotopes of hydrogen and oxygen (δ2H and δ18O) in precipitation for several sites in Lanzhou, western China, spanning for approximately four years, the variations of deuterium excess between the ground and the cloud base are evaluated by using a one-box Stewart model. The deuterium excess difference below the cloud base during summer (−17.82‰ in Anning, −11.76‰ in Yuzhong, −21.18‰ in Gaolan and −12.41‰ in Yongdeng) is greater than that in other seasons, and difference in winter is weak due to the low temperature. The variations of deuterium excess in precipitation due to below-cloud evaporation are examined for each sampling site and year. The results are useful to understand the modification of raindrop isotope composition below the cloud base at a city scale, and the quantitative methods provide a case study for a semi-arid region at the monsoon margin.

scholarly journals Toward a Quantitative Approach to the Specialness of Poetry: Taking Chang Hen Ge and Chang Hen Ge Zhuan as a Case Study

SAGE Open ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 215824402110299
Author(s):  
Cong Zhang ◽  
Rui Yuan
Keyword(s):  
Empirical Evidence ◽  
Quantitative Methods ◽  
Great Influence ◽  
Quantitative Approach ◽  
Linguistic Features ◽  
Function Words ◽  
New Perspective

The differences of linguistic features between Chang Hen Ge ( Ge) and Chang Hen Ge Zhuan ( Zhuan) have rarely been mentioned in the relevant fields. Nevertheless, these differences can best highlight the specialness of poetry, for the two works were written contemporaneously by two friends on the same subject, in distinct styles. This article employs quantitative methods and indicators to provide empirical evidence for the specialness of Ge through comparisons between the two. The results show that, on the premise of expressing the same subject in different styles, Ge does have certain linguistic characteristics compared with Zhuan. Its particularity is reflected not only in fewer repeat characters and words but also in their richness, as well as in the use of more content words and fewer function words. Moreover, all of these characteristics have had a great influence on Ge’s artistic level and dissemination. Through this study, we hope that our methods provide a new perspective and shed some light on this area.

The Spatial-Temporal Change Pattern of Wetland in the Middle-Lower Yangtze River: A Case Study of Wuhu, Anhui

2014 ◽  
Vol 513-517 ◽  
pp. 3228-3232 ◽  
Author(s):  
Xiao Li Tao ◽  
Yong Ping Bai
Keyword(s):  
Quantitative Methods ◽  
Temporal Change ◽  
Remote Sensing Image ◽  
Land Uses ◽  
Change Pattern ◽  
Spatial Changes ◽  
Temporal And Spatial ◽  
Gis Software ◽  
Urban Sprawling

Wetlands play a number of roles in the environment, which are also considered the most biologically diverse of all ecosystems. Utilizing RS and the GIS software, remote datum were matched and classified. By these transactions, the temporal and spatial changes of wetland landscape are explored in Wuhu, combining qualitative analysis and quantitative methods. This paper analyzed the time-spatial revolution process which indicated that, firstly the area of wetland reduced rapidly from remote sensing image in 1988, 2001 and 2005, secondly the exterior of urban changed acutely and the interior were protected well in view of spatial pattern. Moreover, driving force factors were pointed out. Human activities, especially urbanization were the main causes of wetlands degradation. Simultaneity, the development of farming, the construction of infrastructure and nature were important factors. Owing to rapid economic development and urban sprawling, wetlands are encountering threaten to be converting to other land uses. Thus, the paper provides policy advices for wetland conservation and urban planning toward sustainable development.

scholarly journals The Impact of Information Communication and Technology Utilization on the Financial Performance of Microfinance Institutions in Rwanda Case Study: Reseau Interdiocesain De Microfinance (Rim) Ltd, Rwanda (2011 -2015)

2017 ◽  
Vol 4 (2) ◽  
pp. 13
Author(s):  
Jean Bosco Harelimana
Keyword(s):  
Financial Performance ◽  
Quantitative Methods ◽  
Positive Impact ◽  
Financial Sustainability ◽  
Microfinance Institutions ◽  
Information Communication ◽  
Qualitative And Quantitative Methods ◽  
Descriptive Survey ◽  
The Impact

The study analyzed the impact of ICT utilization on the financial performance of microfinance institutions inRwanda with case study of Réseau Interdiocesain de microfinance (RIM) Ltd undertaken within 5 years (2011-2015). The study adopted the use of descriptive survey using both qualitative and quantitative methods for a totalsample size of 132. Purporsive and simple random simpling was used for this purpose. Primary and Secondary datawere collected and thene analyzed using SPSS version 16.00. The study found that ICT has been introduced and usedabout 5 years and above. The study found that ICT impact firstly on financial sustainability and profitability (65.8%),secondly on financial efficiency and productivity (23.7) and finally on portfolio quality (5.3%). ICT utilization havea high influence to the RIM Ltd.’s financial performance compared to the previous situation.The correlation results imply that ICT usage has a positive impact on financial sustainability and profitability as theymove in the same direction (R=0.502). The strength of the impact was found to be low due to the low investments inICT among microfinance institutions.

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