scholarly journals Catchment management and health of coastal ecosystems: synthesis and future research

2009 ◽  
Vol 60 (11) ◽  
pp. 1196 ◽  
Author(s):  
F. J. Kroon ◽  
J. Brodie

Globally, many coastal ecosystems are threatened by a decline in water quality from land-based runoff. However, dynamic and complex biophysical and socioeconomic interdependencies often hamper the reversal of this decline in water quality. This Special Issue illustrates an integrated approach to address deteriorating water quality from land-based runoff in the Tully basin to the Great Barrier Reef (GBR), Australia. Nitrate was identified as the key pollutant, and was mainly derived from sugarcane and banana farms. To achieve GBR water quality targets for chlorophyll a, the dissolved inorganic nitrogen (DIN) load needs to be reduced by at least 80%. Modelling shows that financially beneficial changes to management of sugarcane results in a 50% reduction in DIN load. However, larger reductions would come at a significant cost. An adaptive approach is proposed as a framework to assess (i) the efficacy of implementing the recommended management practices, and (ii) progress against set targets. Quantification of linkages between catchment management and coastal ecosystem health will help inform management strategies based on ecosystem performance measures. Verification of the efficacy of existing and exploration of innovative management strategies, as well as spatial and temporal prioritisation of their implementation, remain critical to achieve coastal ecosystem rehabilitation, including water quality improvement.

2020 ◽  
Vol 30 (4) ◽  
pp. 537-560
Author(s):  
Chaturong Napathorn

Purpose This paper aims to contribute to the literature on global talent management by examining how multinational corporations (MNCs) from developed and emerging economies manage talented employees in other emerging economies. Specifically, it aims to understand why MNCs from developed economies are likely to face lower levels of challenge than MNCs from emerging economies when translating corporate-level talent management strategies to their subsidiaries located in emerging economies and how local contextual factors influence the translation processes. Design/methodology/approach This paper undertakes a matched-case comparison of two MNCs, one from a developed economy and the other from an emerging economy, that operate in the emerging economy of Thailand. Evidence was obtained from semi-structured interviews field visits and a review of archival documents and Web resources. Findings Based on the obtained evidence, this paper proposes that MNCs from developed economies tend to face challenges in terms of skill shortages, and these challenges affect their translation of talent management strategies to the subsidiary level. By contrast, MNCs from emerging economies tend to face challenges in terms of both skill shortages and the liability of origin (LOR) (i.e. weak employer branding) in the translation process. Both groups of MNCs are likely to develop talent management practices at the subsidiary level to address the challenge of successfully competing in the context of emerging economies. Research limitations/implications One limitation of this research is its methodology. Because this research is based on a matched-case comparison of an MNC from a developed economy and an MNC from an emerging economy, both of which operate in the emerging economy of Thailand, it does not claim generalizability to all MNCs and to other emerging economies. Rather, the results of this research should lead to further discussion of how MNCs from developed and emerging economies translate corporate-level talent management strategies into subsidiary-level practices to survive in other emerging economies. However, one important issue here is that there may be a tension between the use of expatriates and local top managers at MNCs’ subsidiaries located in other emerging economies as drivers for knowledge sourcing in that the importance of expatriates may diminish over time as the subsidiaries located in those economies age (Dahms, 2019). In this regard, future research in the area of global talent management should pay special attention to this issue. The other important issue here is that it is possible that the two case study MNCs are very different from one another because of their organizational development stage, history and current globalization stage. Thus, this issue may also influence the types of talent management strategies and practices that the two case study MNCs have developed in different countries. In particular, MNCs from emerging economies (ICBC) may not have developed their global HR strategies, as they have not yet operated globally as in the case of MNCs from developed economies (Citibank). This can be another important issue for future research. Additionally, both MNCs examined in this research operate in the banking industry. This study, therefore, omits MNCs that operate in other industries such as the automobile industry and the hotel and resort industry. Future researchers can explore how both groups of MNCs in other industries translate their talent management strategies into practices when they operate in other emerging economies. Moreover, this study focuses only on two primary contextual factors, the skill-shortage problem and LOR; future research can explore other local contextual factors, such as the national culture, and their impact on the translation of talent management strategies into practices. Furthermore, quantitative studies that use large sample sizes of both groups of MNCs across industries might be useful in deepening our understanding of talent management. Finally, a comparison of talent management strategies and practices between Japanese MNCs and European MNCs that operate in Thailand would also be interesting. Practical implications The HR professionals and managers of MNCs that operate in emerging economies or of companies that aim to internationalize their business to emerging economies must pay attention to local institutional structures, including national skill formation systems, to successfully implement talent management practices in emerging economies. Additionally, in the case of MNCs from emerging economies, HR professionals and managers must understand the concept of LOR and look for ways to alleviate this problem to ensure the success of talent management in both developed economies and other emerging economies. Social implications This paper provides policy implications for the government in Thailand and in other emerging economies where the skill-shortage problem is particularly severe. Specifically, these governments should pay attention to solving the problem of occupation-level skill shortages to alleviate the severe competition for talented candidates among firms in the labor market. Originality/value This paper contributes to the prior literature on talent management in several ways. First, this paper is among the first empirical, qualitative papers that aim to extend the literature on global talent management by focusing on how MNCs from different groups of countries (i.e. developed economies and emerging economies) manage talented employees in the emerging economy of Thailand. Second, this paper demonstrates that the institutional structures of emerging economies play an important role in shaping the talent management practices adopted by the subsidiaries of MNCs that operate in these countries. In this regard, comparative institutionalism theory helps explain the importance of recognizing institutional structures in emerging economies for the purpose of developing effective talent management practices. Finally, there is scarce research on talent management in the underresearched country of Thailand. This study should, therefore, assist managers who wish to implement corporate-to-subsidiary translation strategies in Thailand and other emerging economies.


2020 ◽  
Vol 36 (3) ◽  
pp. 139-151
Author(s):  
William E. Walton ◽  
Kevin Mai ◽  
Andrew Nguyen ◽  
Rex Tse

ABSTRACT Emergent macrophytes play critical roles in water treatment processes of free-water surface constructed treatment wetlands. Management strategies for plant biomass affect wetland function and mosquito populations. Sinking of harvested macrophyte biomass is thought to provide organic carbon that enhances denitrifying bacteria important for nutrient removal while concomitantly reducing harborage for mosquitoes. The effects of sinking versus floating dried plant biomass (California bulrush [Schoenoplectus californicus]) on immature mosquito abundance and water quality (nutrient levels, oxygen demand, and physicochemical variables) were examined in mesocosms (28-m2 ponds or 1.4-m2 wading pools) under different flow regimes in 4 studies. The numbers of mosquito larvae in earthen ponds with floating vegetation were greater than in ponds with sunken vegetation on most dates but did not differ significantly between the 2 vegetation treatments in experiments using wading pools. Differences of the abundance of Anopheles larvae between the 2 vegetation management treatments were larger than for Culex larvae when naturally occurring larval mosquito predators were present. At high turnover rates (>2 pond volumes/day), water quality did not differ significantly between the vegetation management treatments and the water supply. At low turnover rates (approximately 2–6% of water volume/day), water quality differed significantly between the 2 vegetation management treatments and the water supply. Sinking vegetation can enhance the effectiveness of mosquito control but, depending on water management practices, may raise the concentrations of water quality constituents in discharges that are regulated under the Clean Water Act.


Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1846
Author(s):  
Hong Nguyen ◽  
Friedrich Recknagel ◽  
Wayne Meyer

Urbanization poses a challenge to sustainable catchment management worldwide. This study compares streamflows and nutrient loads in the urbanized Torrens catchment in South Australia at present and future urbanization levels, and addresses possible mitigation of urbanization effects by means of the control measures: river bank stabilization, buffer strip expansion, and wetland construction. A scenario analysis by means of the Soil and Water Assessment Tool (SWAT) based on the anticipated urban population density growth in the Torrens catchment over the next 30 years predicted a remarkable increase of streamflow and Total Phosphorous loads but decreased Total Nitrogen loads. In contrast, minor changes of model outputs were predicted under the present urbanization scenario, i.e. urban area expansion on the grassland. Scenarios of three feasible control measures demonstrated best results for expanding buffer zone to sustain stream water quality. The construction of wetlands along the Torrens River resulted in the reduction of catchment runoff, but only slight decreases in TN and TP loads. Overall, the results of this study suggested that combining the three best management practices by the adaptive development of buffer zones, wetlands and stabilized river banks might help to control efficiently the increased run-off and TP loads by the projected urbanization of the River Torrens catchment.


Dryland farming is a major export earner for many temperate-zone countries, yet it continues to degrade a country's natural resources. Effects are not restricted to the land - changes in water quality can reduce the potential uses of water and bring about catastrophic changes in both freshwater and coastal ecosystems. Farming Action: Catchment Reaction provides a comprehensive technical overview of the relationships between dryland farming systems and catchment land and water quality in Australia, and integrates it in a whole system framework. It deals with the issues in terms of people, pointers, processes and prediction as it discusses social aspects of developing and implementing research to improve dryland farming systems in catchment management programs, indicators of catchment health, and the processes which determine the impact of the farming action on the catchment response. It concludes by considering the adequacy of our ability to use this process knowledge in models to predict the effect of dryland farming on catchment condition.


2011 ◽  
Vol 46 (1) ◽  
pp. 64-73 ◽  
Author(s):  
Qi Yang ◽  
Glenn Benoy ◽  
Zhengyong Zhao ◽  
Thien Lien Chow ◽  
Charles P.-A. Bourque ◽  
...  

Exceedance of water-quality standards is important in assessing water quality. The effectiveness of soil conservation Beneficial Management Practices (BMPs) should be measured according to the BMPs' impact on exceedance frequencies. However, estimating exceedance frequencies for different management scenarios with field measurements is practically impossible due to difficulties in obtaining adequate data for analysing different combinations of BMPs. The objective of this modeling research was to analyse exceedance frequencies for different management strategies applied in the Black Brook Watershed (BBW). Daily concentrations of total suspended sediments (TSS) and soluble phosphorous (sol-P) were predicted with the Soil and Water Assessment Tool (SWAT) and assessed against water-quality standards from the Canadian Council of Ministers of the Environment (CCME) and National Agri-Environmental Standards Initiative-Ideal Performance Standards (NAESI-IPS). The investigated BMPs included conservation tillage, reduced fertilizer application, crop rotation, flow diversion terraces (FDT) and the combination of all four BMPs. The results indicated that FDT was the most effective at reducing exceedance frequencies of TSS and sol-P. Under the different management scenarios, we calculated the annual exceedance frequencies of TSS and sol-P concentrations above the CCME (20–45% and 10–26%) and NAESI-IPS (32–55% and 20–38%).


2012 ◽  
Vol 28 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Sharon R. Aarons ◽  
Cameron J. P. Gourley

AbstractAgriculture in general and intensive animal production in particular can degrade the environment, especially as a consequence of the overuse of nutrients. Intensively grazed dairy systems, defined by the presence of foraging animals in the landscape, are often considered a more benign approach to dairy production with perceived smaller impacts due to the reduced requirement for manure disposal. However, grazing dairy cows contribute nutrients and pathogens in excreta, and sediment through landscape deformation. These impacts can dramatically increase in parts of the farm such as feeding, watering and sacrifice areas, laneways and night paddocks where animals are concentrated and spend a disproportionate amount of time. Other practices such as the disposal of dairy shed or dairy factory effluent and cultivation of fodder crops can also pollute the environment. A common approach to reduce nutrient, pathogen and sediment losses from dairy farms is to establish buffer zones in riparian areas that act as an interface between upland land use and waterways. This is generally done by fencing riparian areas to exclude stock and revegetating with understory and overstory species, with the aim of increasing infiltration, trapping sediment and decreasing contaminant losses from upland pastures. However, poorly designed and managed riparian areas may themselves contribute to further environmental degradation. Rarely is an integrated approach, including factors such as animal behavior and dairy farm management practices, as well as an analysis of landscape and riparian hydrology used in developing riparian management recommendations for individual farms. This paper reviews the threats posed by intensively grazed dairy systems, approaches to improve riparian zone management and recommends future research needs.


2015 ◽  
Vol 30 (2) ◽  
pp. 160-175 ◽  
Author(s):  
Alnoor Bhimani ◽  
Mthuli Ncube ◽  
Prabhu Sivabalan

Purpose – This paper aims to assess the impact of the presence/absence of risk management practices on the risk of merger and acquisition (M&A) failure. Design/methodology/approach – An agency theoretic perspective is adopted, along with a mixed-methods approach to study managerial complexity beyond simply “good” and “bad”. The focus is on an agency conflicts. Findings – The authors first present an integrated framework that classifies managerial behaviour and risk management, where M&A bids can become vehicles for maximising managerial benefits rather than shareholder value. The authors proceed to consider M&A activity that benefits both managers and shareholders in the presence of risk management strategies. Research limitations/implications – The paper highlights the benefits of multiple paradigms and research paths that address dimensions captured by an agency theoretic perspective. Practical implications – The authors regard this paper as having particular significance in that the global financial crisis has impacted M&A activities and objectives, shifting the employment and related risks faced by managers. Originality/value – The paper suggests future research paths to advance the understanding of the complex behaviour of managers involved in M&A activities that go beyond the classification of “good” and “bad” managers.


2021 ◽  
Author(s):  
Mariana Mayer-Pinto ◽  
Theresa M. Jones ◽  
Stephen E. Swearer ◽  
Kylie A. Robert ◽  
Damon Bolton ◽  
...  

Terrestrial, marine, and freshwater realms are inherently linked through ecological, biogeochemical and/or physical processes. An understanding of these connections is critical to optimise management strategies and ensure the ongoing resilience of ecosystems. Artificial light at night (ALAN) is a global stressor that can profoundly affect a wide range of organisms and habitats and impact multiple realms. Despite this, current management practices for light pollution rarely consider connectivity between realms. Here we discuss the ways in which ALAN can have cross-realm impacts and provide case studies for each example discussed. We identified three main ways in which ALAN can affect two or more realms: 1) impacts on species that have life cycles and/or stages on two or more realms, such as diadromous fish that cross realms during ontogenetic migrations and many terrestrial insects that have juvenile phases of the lifecycle in aquatic realms; 2) impacts on species interactions that occur across realm boundaries, and 3) impacts on transition zones or ecosystems such as mangroves and estuaries. We then propose a framework for cross-realm management of light pollution and discuss current challenges and potential solutions to increase the uptake of a cross-realm approach for ALAN management. We argue that the strengthening and formalisation of professional networks that involve academics, lighting practitioners, environmental managers and regulators that work in multiple realms is essential to provide an integrated approach to light pollution. Networks that have a strong multi-realm and multi-disciplinary focus are important as they enable a holistic understanding of issues related to ALAN.


HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 521b-521
Author(s):  
Cassandra C. Sheaffer ◽  
Mary Ann Rose

Expanding urbanization in Ohio has made the availability of quality water an emerging issue of great importance to the state's nursery industry. This development necessitates an examination of nurseries' use and management of water. This study surveyed 600 Ohio nursery growers with a mail questionnaire to determine the frequency of irrigation and water-saving techniques across the state. The 21-question questionnaire covered topics including water sources, irrigation practices, water testing and information needs. The mailing list used was the Ohio Dept. of Agriculture's licensed nursery operators list. Nonrespondents received a postcard reminder and a second copy of the survey within 3 months of the initial mailing, yielding a 45% response rate. Data was analyzed using SPSS software. Responses indicate approximately 57% of Ohio nurseries used irrigation in the 1997 growing season. For field production, 64%of nurseries used overhead irrigation for at least half of their irrigated production; for container production, 91%. Nearly 41% of respondents using irrigation reported capturing runoff for reuse this past year. The most common irrigation sources for Ohio nurseries were wells (79%) and ponds (62%). Additional goals for the project include raising awareness of water management and water quality issues, identify common water quality problems, and to obtain direction for future research and extension efforts.


2010 ◽  
Vol 37 (8) ◽  
pp. 630 ◽  
Author(s):  
W. David Walter ◽  
Michael J. Lavelle ◽  
Justin W. Fischer ◽  
Therese L. Johnson ◽  
Scott E. Hygnstrom ◽  
...  

Abundant populations of elk (Cervus elaphus) are cherished game in many regions of the world and also cause considerable human–wildlife conflicts through depredation on agriculture and speciality crops, lack of regeneration to native ecosystems, collisions with vehicles and transmission of disease between free-ranging and farmed hoofstock. Management of elk varies, depending on current and historical agency objectives, configuration of the landscapes elk occupy, public perception, population density and behaviour of elk. Selection of the method to manage elk often requires knowledge of timing of impacts, duration relief from elk damage is desired, cost-effectiveness of management activities, tolerance of impacts, public perception of management strategies and motivation or habituation of elk to determine the likelihood of success for a proposed management action. We reviewed methods that are available to control abundant populations of elk that include lethal (e.g. hunting, sharpshooting) and non-lethal (e.g. fertility control, frightening) options. We promote an integrated approach that incorporates the timely use of a variety of cost-effective methods to reduce impacts to tolerable levels. Lethal options that include regulated hunting, sharpshooting and aerial gunning vary by likelihood of success, duration needed for population reduction, cost to implement reduction and public perceptions. Several non-lethal options are available to affect population dynamics directly (e.g. fertility control, translocation), protect resources from damage (e.g. fences, repellents) or influence space use of elk on a regular basis (e.g. harassment, frightening, herding dogs, humans). Public perception should be considered by agencies that are looking for feasible methods to control populations of elk. Disturbance to residents or visitors of public property may influence methods of management employed. Future research should explore the duration of harassment needed to avert elk from sensitive areas and costs to implement such programs. Several methods in our review were implemented on deer and additional research on elk and other cervids in conflict with human interests would provide a much needed component to our understanding of management methods available for ungulate species.


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