Plants and river morphodynamics

Author(s):  
Angela Gurnell

<p>Research within the field of fluvial biogeomorphology focuses on the impact of organisms, particularly plants, on physical processes and landform development within river environments. This research field has evolved and matured over 50 years such that strong links between plants and river morphodynamics are now established and are increasingly becoming embedded in river management practices.</p><p>In this presentation, I provide a personal perspective on the evolution of fluvial biogeomorphology, emphasising five parallel research themes that were initiated in different decades. Research within these themes continues and combines to underpin our current state of knowledge:</p><p>The 1970s       Natural vegetation colonises areas according to the degree of river disturbance such that certain plant communities are associated with particular river landforms.</p><p>The 1980s       Dead wood pieces influence river morphodynamics and support the development of particular assemblages of physical habitats.</p><p>The 1990s       Some large wood sprouts: dead and living trees drive a geomorphological continuum.</p><p>The 2000s       River and riparian forest dynamics are linked: field observations, laboratory experiments and numerical models converge.</p><p>The 2010s       Many riparian and aquatic plant species can act as river engineers: local engineer species reflect the environmental setting.</p><p>2020 onwards    Increasing integration: understanding how interactions between plants and rivers adjust with changes in the biogeographical setting, plant species pool and river energy.</p>

Agronomy ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 300 ◽  
Author(s):  
Pradeep Wagle ◽  
Prasanna Gowda

Adoption of better management practices is crucial to lessen the impact of anthropogenic disturbances on tallgrass prairie systems that contribute heavily for livestock production in several states of the United States. This article reviews the impacts of different common management practices and disturbances (e.g., fertilization, grazing, burning) and tallgrass prairie restoration on plant growth and development, plant species composition, water and nutrient cycles, and microbial activities in tallgrass prairie. Although nitrogen (N) fertilization increases aboveground productivity of prairie systems, several factors greatly influence the range of stimulation across sites. For example, response to N fertilization was more evident on frequently or annually burnt sites (N limiting) than infrequently burnt and unburnt sites (light limiting). Frequent burning increased density of C4 grasses and decreased plant species richness and diversity, while plant diversity was maximized under infrequent burning and grazing. Grazing increased diversity and richness of native plant species by reducing aboveground biomass of dominant grasses and increasing light availability for other species. Restored prairies showed lower levels of species richness and soil quality compared to native remnants. Infrequent burning, regular grazing, and additional inputs can promote species richness and soil quality in restored prairies. However, this literature review indicated that all prairie systems might not show similar responses to treatments as the response might be influenced by another treatment, timing of treatments, and duration of treatments (i.e., short-term vs. long-term). Thus, it is necessary to examine the long-term responses of tallgrass prairie systems to main and interacting effects of combination of management practices under diverse plant community and climatic conditions for a holistic assessment.


2003 ◽  
Vol 9 (4) ◽  
pp. 302 ◽  
Author(s):  
Josh Dorrough ◽  
Julian Ash

The presence of perennial plant species in grazed habitats may be an imperfect predictor of their long-term ability to persist under grazing by livestock. This is particularly the case in landscapes where grazing by livestock is a relatively recent occurrence or where management practices are leading to intensification of grazing. This paper investigates the impacts of grazing on the native perennial inter-tussock forb Leptorhynchos elongatus (Asteraceae) in grasslands on the Monaro Tablelands of New South Wales. Although the species persists in grazed habitats, exclosures indicate that current grazing management can lead to severe depletion of seed, largely due to selective removal of flowers and seed heads by livestock. A population model suggests that under current grazing management, population growth rates may be negative. Removal of livestock during flowering and seed set may assist long-term persistence of this species in grazed habitats. Despite almost 200 years of livestock grazing on the Monaro Tablelands, recent intensification of grazing management could result in the future loss of some plant species in grazed habitats.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mikhail Kosmynin

PurposeThe aim of this systematic literature review (SLR) is to map out the current state of the research on collaboration in the context of social entrepreneurship organisations (SEOs), synthesise this line of research and advance a research agenda.Design/methodology/approachA SLR of 40 scientific articles found in the Scopus and Web of Science databases built the foundation for an analysis of the state-of-the-art of the research addressing the interplay of SEOs and collaboration. This area of research has been very recent since the selected articles have been published since 2005 and more than half of which have appeared since 2017.FindingsThe findings suggest that collaboration is increasingly perceived as a crucial entrepreneurial activity and process for SEOs. The results indicate that collaboration is a vibrant and rapidly growing line of research which spans different fields of study, contexts, varied theoretical perspectives and multiple units of analysis. Furthermore, a total of five key research themes are identified pertaining to collaboration in the context of SEOs, such as motivations and strategies of collaboration, its antecedents, the interplay of institutional logics and tensions arising in collaboration, the impact of collaboration on the mission of SEOs and collaborative processes and practices.Originality/valueTo lend structure to this fragmented field of inquiry, this study systematically reviews and synthesises research on collaboration in the context of SEOs. In doing so, the study reveals that this line of research is under-researched, offering a significant scope for further scrutiny.


2018 ◽  
Vol 29 (2) ◽  
pp. 767-783 ◽  
Author(s):  
Maciel Manoel Queiroz ◽  
Renato Telles

Purpose The purpose of this paper is to recognise the current state of big data analytics (BDA) on different organisational and supply chain management (SCM) levels in Brazilian firms. Specifically, the paper focuses on understanding BDA awareness in Brazilian firms and proposes a framework to analyse firms’ maturity in implementing BDA projects in logistics/SCM. Design/methodology/approach A survey on SCM levels of 1,000 firms was conducted via questionnaires. Of the 272 questionnaires received, 155 were considered valid, representing a 15.5 per cent response rate. Findings The knowledge of Brazilian firms regarding BDA, the difficulties and barriers to BDA project adoption, and the relationship between supply chain levels and BDA knowledge were identified. A framework was proposed for the adoption of BDA projects in SCM. Research limitations/implications This study does not offer external validity due to restrictions for the generalisation of the results even in the Brazilian context, which stems from the conducted sampling. Future studies should improve the comprehension in this research field and focus on the impact of big data on supply chains or networks in emerging world regions, such as Latin America. Practical implications This paper provides insights for practitioners to develop activities involving big data and SCM, and proposes functional and consistent guidance through the BDA-SCM triangle framework as an additional tool in the implementation of BDA projects in the SCM context. Originality/value This study is the first to analyse BDA on different organisational and SCM levels in emerging countries, offering instrumentalisation for BDA-SCM projects.


2019 ◽  
Vol 4 (1) ◽  
pp. 68-81
Author(s):  
Falk Hartig

Image Management is a crucial aspect of China’s engagement with the world, and the related scholarship has already produced high-quality learned analyses. This article, however, identifies a certain stagnation in knowledge production. This stagnation, I argue, is first due to a tendency to focus research on a few recurring themes and second due to three contested areas and related research gaps. These contestations concern (1) the question how to describe and conceptualize image management practices, (2) the question what instruments belong to image management practices, and (3) most importantly the question of audiences and how to measure the impact of these practices. By mapping out these areas, this article provides avenues for further research and argues in favor of interdisciplinary mixed-methods research in this field. Taking those contested areas and the existing research gaps more seriously into consideration is imperative to understand China’s communicative practices which increasingly become a major component of China’s overall behavior on the global stage.


2021 ◽  
Vol 307 ◽  
pp. 08003
Author(s):  
Liudmyla Saher ◽  
Daria Kolesnyk ◽  
Liubov Syhyda ◽  
Nadiya Fisunenko

The topic of branding is part of the marketing concept and is actively researched. This study presents a trend analysis, bibliometric overview, and visualization of the current state within the research problem of branding. A review of 1,014 publications from the Scopus database (1996–2020) was conducted. Two combinations of words with a logical operator (“brand” and “consumer behaviour, crisis”) were used. VOSviewer was used to visualize the results and graphically display the material. The analysis helped to draw some valuable conclusions. As a result of the analysis, it is determined that: 1) using filters, the total number of publications in the research field of branding is 984; 2) the growth of the publication activity occurred after 2009. 3) the largest number of studies is conducted by scientists from Europe, North America, Asia and Australia; 4) until 2014, scientists focused on researching the essence of the brand and branding, its benefits, features, etc., then scientists were more focused on the issues of sustainable development, the role and significance of crisis factors, including the impact of the pandemic; 5) the relationships among keywords within the research topic form the following clusters: marketing, corporate social responsibility, brand equity, consumer behaviour, and consumption behaviour. The obtained results are applicable and can be a guidance for further research in the field of branding.


2018 ◽  
Vol 15 (2) ◽  
pp. 1-20
Author(s):  
Sabri Embi ◽  
Zurina Shafii

The purpose of this study is to examine the impact of Shariah governance and corporate governance (CG) on the risk management practices (RMPs) of local Islamic banks and foreign Islamic banks operating in Malaysia. The Shariah governance comprises the Shariah review (SR) and Shariah audit (SA) variables. The study also evaluates the level of RMPs, CG, SR, and SA between these two type of banks. With the aid of SPSS version 20, the items for RMPs, CG, SR, and SA were subjected to principal component analysis (PCA). From the PCA, one component or factor was extracted each for the CG, SR, and RMPs while another two factors were extracted for the SA. Primary data was collected using a self-administered survey questionnaire. The questionnaire covers four aspects ; CG, SR, SA, and RMPs. The data received from the 300 usable questionnaires were subjected to correlation and regression analyses as well as an independent t-test. The result of correlation analysis shows that all the four variables have large positive correlations with each other indicating a strong and significant relationship between them. From the regression analysis undertaken, CG, SR, and SA together explained 52.3 percent of the RMPs and CG emerged as the most influential variable that impacts the RMPs. The independent t-test carried out shows that there were significant differences in the CG and SA between the local and foreign Islamic banks. However, there were no significant differences between the two types of the bank in relation to SR and RMPs. The study has contributed to the body of knowledge and is beneficial to academicians, industry players, regulators, and other stakeholders.


2017 ◽  
Vol 13 ◽  
pp. 244-261
Author(s):  
Mariola Tracz ◽  
Małgorzata Bajgier-Kowalska ◽  
Radosław Uliszak

Podkarpackie Voivodeship is one of the regions of Poland in which the number of agritourism entities is very high. Therefore tourism plays a significant role in its development strategy. The aim of the paper is to identify the current state of agritourism and the changes that have occurred in the region in the years 2000–2016. Specific objectives are to determine the distribution of agritourism farms and their offer, together with a comprehensive analysis of the environmental and socio-economic factors, as well as the impact of the Slovak-Ukrainian border. The report was developed on the statistical materials from the Polish Central Statistical Office, Podkarpackie Agricultural Advisory Centre in Boguchwała and data collected from municipalities and district offices that is published on their websites, as well as through interviews with 100 owners of agritourism farms in the Podkarpackie Voivodeship. The research has shown, on the one hand, the decline in the number of farms in the region and, on the other hand, the increase in the diversity of the tourist offer of these entities. Distribution of agritourism farms is closely linked to the attractiveness of natural environment and quality of secondary tourism resources. Traditional agritourism has not yet fully used its countryside, as well as cross-border advantages of its location.


Sign in / Sign up

Export Citation Format

Share Document