Author: Jacinda W. Wagner
Publisher:
ISBN:
Category :
Languages : en
Pages : 138

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Book Description

Author:
Publisher:
ISBN:
Category : Bufo marinus
Languages : en
Pages : 41

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Book Description
To protect and manage Pacific Northwest salmonid stocks, sound management programs must be developed that incorporate knowledge of the ecological processes critical to their survival. One such process is the nutrient dynamic in headwater spawning streams. It is essential that we understand the trophic relationships among the spawners, the I to 3 year-old juveniles, the invertebrates, and the primary producers in these streams. The hypothesis that I tested is that photoautotrophic production increases due to the decomposition of salmon carcasses. Increased primary production would stimulate the production of invertebrates which are an important food resource of juvenile salmonid species. The hypothesis was tested by comparing periphyton communities sampled from upstream reference sites with those sampled from sites within and downstream of a onemile reach of Still Creek, a stream within the Zigzag Ranger District of the Mount Hood National Forest, in which approximately 300 coho (Oncorhynchus kisutch) carcasses were distributed. Comparisons were based on the numbers of each diatom species observed and periphyton biomass measured as chlorophyll a concentration and mass of organic matter lost on ignition. To more accurately characterize the response of the periphyton community, base-line data were collected before enrichment ascertaining the initial degree of nutrient limitation and measuring the variation within and among sample sites prior to site modification. Nutrient concentration and physical characteristics of the water were also monitored. The data collected indicate that the periphyton communities at each site were similar before carcass enrichment. After enrichment, treatment sites showed an increase in periphyton biomass. No change in species composition was observed from reference to treatment sites during the enrichment. Some suggestions are made for improving the experimental design to better characterize the response of the periphyton community to salmon carcass decomposition, such as increasing sample size, adding more "before treatment" sample times, and adding a second treatment stream.

Author: Ariel Tenenbaum
Publisher:
ISBN: 9781536179699
Category : Medical
Languages : en
Pages : 245

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Book Description
"Much research has been conducted to provide researchers and hearing healthcare professionals with updated information in regard to hearing assessments, results interpretation and case management. This ongoing research is particularly imperative to guide clinicians with optimized methods in assessing and managing pediatric patients with hearing impairment and disability. As such, tremendous research efforts have been made in determining the most optimum methods in assessing hearing using both subjective and objective tests. Since hearing loss can occur due to disrupted peripheral and/or central auditory pathway, there is also a growing interest to study children with auditory processing disorder (APD). Even though notable achievements have been observed in understanding APD, more research is required, particularly in establishing a gold standard APD test and its specific interventions. Aditionally, having an objective test such as speech-evoked auditory brainstem response is beneficial to understand how speech sounds are encoded within the brainstem region in hearing-impaired children, as well as in those with compromised neural function. In this book, we have gathered research from Malaysia and India in this field and hope it will be of interest to our readers"--

Author: Xenia Maria Caldeira Brant
Publisher: Springer Science & Business Media
ISBN: 3642050255
Category : Medical
Languages : en
Pages : 252

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Book Description
Health care is witnessing an explosion of fundamental, clinical and translational research evidence. The emerging paradigm of evidence-based health care rests on the judicious integration of the patient needs/wants, the provider's expertise, and the best available research evidence in the treatment plan. The purpose of this book is to discuss the promise and the limitations of incorporating the best available evidence in clinical practice. It seeks to characterize and define how best available research evidence can be used in clinical practice and to what respect it applies to current public health issues.