The effects of land use on leaf-litter processing by macro-invertebrates in an Australian temperate coastal stream

Replacement of riparian vegetation by pasture has occurred worldwide and is predicted to have strong effects on macroinvertebrate community structure and function in streams, but this has rarely been examined. In this study, leaf processing and macroinvertebrate community structure were examined in a single stream using experimental leaf-packs and surveys of natural leaf-packs. Two sites in each of three land use categories were selected to represent reaches in forest, pasture and forest-pasture boundary regions. In two experiments using tethered leaf-packs, no differences were found in mean leaf breakdown between land use types. However, shredding invertebrates were absent from the pasture sites, so leaf breakdown in pasture resulted from chemical, physical and microbial processes only. Amounts of fine particulate organic matter in experimental leaf-packs were higher in pasture reaches than the forest and boundary reaches but did not influence leaf breakdown. Macroinvertebrate species richness did not differ between land uses. A predictive model developed for species richness and total abundance enabled direct comparison of assemblages on experimental packs to natural leaf-packs. In the forest reach and at the forest-pasture boundary, macroinvertebrate species richness and total abundance increased proportionally with the number of leaves within a pack, but this relationship was not observed in the pasture reach. Pasture land use on Skenes Creek was therefore associated with weakened relationships between allochthonous inputs and macroinvertebrate communities, but this did not alter leaf breakdown.

Business ethics in TQM : the qualities and spectrum zones of a case illustration

Purpose - The objective of this research is to introduce and describe a conceptual framework of business ethics in TQM.

Design/methodology/approach - In order to highlight the concepts proffered, a case study in the Swedish retail industry was conducted. The data that underpin the case illustration have been collected as part of a larger research project in the Swedish retail industry. Draws on and reports the findings from one case of the larger research project that has been used in this instance to inform the role of business ethics in TQM. The case illustration is based on a qualitative approach. The data were collected through interviews with leading executives in the corporation,

Findings - Both time and context become crucial parameters to manage the quality and spectrum zones of core values in the marketplace. In fact, the necessary quality management of business operations has to be performed without delay, minimising the damage. Therefore, the importance of business ethics becomes evident in TQM. In the long run, TQM will not succeed in business operations unless business ethics is considered in the core values to support the techniques and tools applied.

Research limitations/implications - The model has only been tested by relating it to one case in the Swedish retail industry.

Practical implications - TQM is dependent on the contextual and evolutionary issues in the marketplace. Therefore, TQM should be interpreted as a continuous process. The importance of continuously monitoring the spectrum zones and qualities of core values in TQM should not be under-estimated. Therefore, business ethics should always be present in TQM. Further research would benefit from other case studies of how business ethics benefits TQM. Therefore, the dynamics of business ethics in TQM should be further explored.

Originality/value - Business ethics needs to be an essential consideration of any TQM process. Examines how an organization can incorporate this task.

Uteroplacental insufficiency and reducing litter size alters skeletal muscle mitochondrial biogenesis in a sex-specific manner in the adult rat

Uteroplacental insufficiency has been shown to impair insulin action and glucose homeostasis in adult offspring and may act in part via altered mitochondrial biogenesis and lipid balance in skeletal muscle. Bilateral uterine vessel ligation to induce uteroplacental insufficiency in offspring (Restricted) or sham surgery was performed on day 18 of gestation in rats. To match the litter size of Restricted offspring, a separate cohort of sham litters had litter size reduced to five at birth (Reduced Litter), which also restricted postnatal growth. Remaining litters from sham mothers were unaltered (Control). Offspring were studied at 6 mo of age. In males, both Restricted and Reduced Litter offspring had reduced gastrocnemius PPAR γ coactivator-1α (PGC-1 α) mRNA and protein, and mitochondrial transcription factor A (mtTFA) and cytochrome oxidase (COX) III mRNA (P < 0.05), whereas only Restricted had reduced skeletal muscle COX IV mRNA and protein and glycogen (P < 0.05), despite unaltered glucose tolerance, homeostasis model assessment (HOMA) and intramuscular triglycerides. In females, only gastrocnemius mtTFA mRNA was lower in Reduced Litter offspring (P < 0.05). Furthermore, glucose tolerance was not altered in any female offspring, although HOMA and intramuscular triglycerides increased in Restricted offspring (P < 0.05). It is concluded that restriction of growth due to uteroplacental insufficiency alters skeletal muscle mitochondrial biogenesis and metabolic characteristics, such as glycogen and lipid levels, in a sex-specific manner in the adult rat in the absence of impaired glucose tolerance. Furthermore, an adverse postnatal environment induced by reducing litter size also restricts growth and alters skeletal muscle mitochondrial biogenesis and metabolic characteristics in the adult rat.

Skills and qualities and the effective project manager in the UK construction industry

The professional project manager is a sought after commodity (McManus, 1995:12). Many companies face increasing demands to complete projects faster, at lower costs and to higher specifications and as Lock (1996;50) comments; “This work, far from requiring specialisation, demands a sufficient general understanding of the work carried out by those participants for the project manager to be able to discuss the work sensibly”. Though for some the term project manager can be clearly identified, others believe the terms project manager and project management, as used in the construction industry, mean all things to all men and lead to confusion (The Chartered Institute of Building, 1982;12). The lack of clarity surrounding the role of project manager made this area worthy of investigation.

This research sought a deeper understanding of the project management role and an identification of the skills and professionals associated with it. The desk top study revealed definitions of the role and perceptions of the skills involved. The literature showed that authors believed in the need for a balance between knowledge, experience and training and the types of professions involved. The research methodology comprised a qualitative approach, with a questionnaire sent out to a non-random sample of practices specialising in project management. The data analysis adopted uni and bi-variant methods, using SPSS. The research found that the role of the project manager is very broad. Furthermore it is adopted by many construction professions as the background of the project manager is largely perceived as irrelevant to the role. A definition is proposed and relevant skills are identified, finally the importance of experience and training is highlighted.

Perceptions of Place - evaluating experiential qualities of streetscapes

Working with a small set of 60 images from a collection of over 1000 digital photographs, the following paper presents ongoing research into the experiential qualities of street scapes. This paper examines the initial results of a survey of 75 voluntary based perceptive studies and focusses on a sample cohort of 30 participants (20 cognate and 10 non-cognate respondents) who were asked to evaluate a streetscape experience based on favourable and unfavourable perceptive qualities. Using a spatial sequencing process, akin to the 'Serial Vision' methodology of Gordon Cullen, respondents were asked to rate a section of urban fabric based on favourable (hot or warm) and unfavourable (cold or cool) traits and to digitally capture these images. The study yields results which highlight the importance of the quality and effect of green attributes within the overall street scape experience. The implications for urban design practice (streetscape greening), are briefly explored.

Ephemeroptera, Plecoptera and Trichoptera assemblages in litter in a mountain stream of the Atlantic Rainforest from Southeastern Brazil

A fauna de Ephemeroptera, Plecoptera e Trichoptera associadas ao folhiço em um riacho do sudeste do Brasil foi estudada com o objetivo de responder às seguintes questões: 1) A riqueza e a composição faunística de EPT difere entre os dois mesohabitats (corredeira-remanso) mesmo quando associadas ao mesmo substrato, folhiço? 2) A similaridade da fauna de EPT entre os dois mesohabitas muda temporalmente? 3) A estrutura funcional de EPT difere entre os dois mesohabitats (corredeira-remanso)? Para responder essas questões, coletas mensais, de novembro de 1999 a junho de 2000, foram feitas no Ribeirão Bocaina com rede D (10 acúmulos de folhas em remanso e 10 em corredeira). A fauna de EPT do Ribeirão Bocaina foi mais diversificada e mais abundante no folhiço em corredeira do que no folhiço em remanso, no entanto, quando a riqueza foi padronizada para o mesmo número de indivíduos essa se tornou similar para as duas condições. A fauna de EPT foi bastante diferente entre os dois mesohabitats, tanto em termos da composição faunística quanto em termos funcionais. Isso provavelmente ocorreu devido às diferenças de velocidade da água, no tempo de residência do folhiço e na taxa de oxigênio da água entre os dois mesohabitats.

Effect of the litter material on drinking water quality in broiler production

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Litter materials and the incidence of carcass lesions in broilers chickens

The aim of this study was to evaluate the effects of different litter materials on litter compaction, broiler feathering and the incidence of carcass lesions. In the experiment, 3240 one-day-old Ross® chicks were selected by sex and distributed according to a completely randomized experimental design in a 2 x 6 factorial arrangement (two sex and six litter materials). The following litter materials were used: wood shavings, rice husks, chopped Napier grass, 50% sugar cane bagasse plus 50% wood shavings, 50% sugar cane bagasse plus 50% rice husks, and pure sugar cane bagasse. Litter compaction was weekly assessed using a penetrometer. on days 21, 35 and 42 of the experimental period, feathering on the back and legs was scored according to a 0 - 10 scale. on day 42, birds were slaughtered and the presence of bruises, scratches and footpad lesions was recorded. Litter material had no effect on bird feathering. Carcass lesions (scratches, bruises and footpad lesions) were influenced by the litter material evaluated. Birds reared on sugarcane bagasse and chopped Napier grass presented more scratches, bruises and footpad lesions than the others. Dermatitis was more evident in birds reared on sugarcane bagasse, chopped Napier grass and the combination of litter materials. It was found that males presented higher incidence of dermatitis and footpad lesions than females. Each litter material presented different compaction degrees, which increased along the experimental period. Sugarcane bagasse, chopped Napier grass and the combination of bedding materials presented the highest degree of compaction, compared with wood shavings and rice husks.

Input of litter in deforested and forested areas of a tropical headstream

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Broiler litter reutilization applying different composting concepts

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Effect of different substrates on composting of poultry litter

The objective was to evaluate the differences between distinct types of litter material and their combinations in the dynamics of degradation on the organic matter fractions and the quality of the final compound. The treatments were established according to material used as substrate for broiler litter: treatment 1 - rice husks; 2 - sugar cane bagasse; 3 - wood shavings; 4 - wood shavings + sugar cane bagasse; 5 - rice husks + sugar cane bagasse; and 6 - Napier grass. The following variables were monitored: temperature, levels of total solids (TS), volatile solids (VS), mass and volume of the pile, fibrous fraction, and levels and reductions of N, P and K during the process. Piles formed with Napier grass and sugar cane bagasse presented the highest average temperatures during composting. The greater average reductions in TS and VS were attained in piles with sugar cane bagasse (68.12 and 73.07%, for TS and VS, respectively). The reductions of greatest volume occurred in piles with sugar cane bagasse (52.08%), followed by Napier grass (50.56%). Poultry litters composed of rice husks and wood shavings presented 13.21 and 10.23% of lignin, respectively, which contributed to the lower degradation of fibrous fraction and degradability. Substrates with lower lignin content were those with greatest organic matter degradation rate and had reduced losses of N levels during the process. Composting performance is affected by the initial substrate used to compose the poultry litter.