bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of Polymer Seed Coatings, Soil Raking, and Time of Sowing on Seedling Performance in Post‐Mining Restoration
Authors: Turner Shane R. , Pearce Brett , Rokich Deanna P. , Dunn Robert R. , Merritt David J. , Majer Jonathan D. , Dixon Kingsley W. 
Published: May 2006

Abstract This study represents part of a broader investigation into novel seed broadcasting methodologies as a means to optimize rehabilitation techniques following sand mining. Specifically, the study investigated the use of polymer seed coatings, time of sowing application, and in situ raking of the topsoil to optimize seedling recruitment to site. For polymer seed coatings, an ex situ trial was undertaken to evaluate seed coating effects on seedling emergence. Results demonstrated that seed coatings did not significantly inhibit maximum emergence percentage of 10 Banksia woodland species (out of 11 evaluated), but coated seeds from four species were on average 2–6 days slower to emerge than noncoated seeds. Seed coatings were found to have a greater effect in situ, with more coated seeds emerging than noncoated seeds. Topsoil raking (following seed sowing) and time of sowing were found to have the greatest impact on seedling emergence, with higher emergence following topsoil raking (5‐ to 90‐fold increase) and sowing in May (late autumn) (1.4‐ to 12‐fold increase) rather than in July (mid‐winter). The implications for mining rehabilitation are discussed, and areas for further research are considered.
Vegetation Succession After Bauxite Mining in Western Australia
Authors: Norman Melanie A. , Koch John M. , Grant Carl D. , Morald Tim K. , Ward Samuel C. 
Published: May 2006

Abstract Alcoa World Alumina Australia has been rehabilitating bauxite mines in the jarrah forest of Western Australia for more than 35 years. An experiment was established in 1988 using three different seed treatments (legume and small understorey mix, small understorey mix only, and no seed) and two fertilizer treatments (N and P, and P only). The objectives of this study were to (1) document vegetation changes in the first 14 years after bauxite mining; (2) assess whether the vegetation is becoming more similar to the unmined forest; and (3) gain a better understanding of successional processes. Seed treatments significantly affected 13 of the 14 measured vegetation characteristics. Native species richness was higher in seeded than in unseeded sites at 1, 2, and 5 years of age, whereas diversity and evenness were generally higher at all assessment ages. Exotic species density was higher in unseeded than in seeded sites from 5 years onward, whereas richness was higher from 8 years onward. Nitrogen fertilizer significantly increased exotic species richness, density, and cover. Ephemerals dominated plant density in all rehabilitation treatments over time, whereas seeder species dominated cover. In contrast, resprouting species dominated density and cover in the unmined forest. Orchids were the only species that were not present in the first year in rehabilitated sites but increased in abundance over time. Vegetation composition in rehabilitated areas did not become more similar to the unmined forest during the 14 years since seeding, instead strongly reflected the initial species mix. Rehabilitated bauxite mines appear to follow the initial floristic composition model of succession.
A Spatial Modeling Approach to Identify Potential Butternut Restoration Sites in Mammoth Cave National Park
Authors: Thompson Laura M. , Van Manen Frank T. , Schlarbaum Scott E. , DePoy Mark 
Published: May 2006

AbstractIncorporation of disease resistance is nearly complete for several important North American hardwood species threatened by exotic fungal diseases. The next important step toward species restoration would be to develop reliable tools to delineate ideal restoration sites on a landscape scale. We integrated spatial modeling and remote sensing techniques to delineate potential restoration sites for Butternut (Juglans cinereaL.) trees, a hardwood species being decimated by an exotic fungus, in Mammoth Cave National Park (MCNP), Kentucky. We first developed a multivariate habitat model to determine optimum Butternut habitats within MCNP. Habitat characteristics of 54 known Butternut locations were used in combination with eight topographic and land use data layers to calculate an index of habitat suitability based on Mahalanobis distance (D2). We used a bootstrapping technique to test the reliability of model predictions. Based on a threshold value for theD2statistic, 75.9% of the Butternut locations were correctly classified, indicating that the habitat model performed well. Because Butternut seedlings require extensive amounts of sunlight to become established, we used canopy cover data to refine our delineation of favorable areas for Butternut restoration. Areas with the most favorable conditions to establish Butternut seedlings were limited to 291.6 ha. Our study provides a useful reference on the amount and location of favorable Butternut habitat in MCNP and can be used to identify priority areas for future Butternut restoration. Given the availability of relevant habitat layers and accurate location records, our approach can be applied to other tree species and areas.
Early Dynamics of Plant Communities on Revegetated Motorway Slopes from Southern Spain: Is Hydroseeding Always Needed?
Authors: Matesanz Silvia , Valladares Fernando , Tena David , Costa‐Tenorio Margarita , Bote Daniel 
Published: May 2006

Abstract The increasing global rate of road construction is leading to a parallel increase of areas of degraded soil conditions and steep slopes that need revegetation. Hydroseeding with commercial seeds of fast‐growing grasses and legumes is a common practice in revegetation of motorway slopes. We carried out 3 years of monitoring of vegetation dynamics on hydroseeded and nonhydroseeded motorway slopes (48 slopes) in a maritime Mediterranean zone in Málaga (southern Spain). Our main objectives were to test whether hydroseeding significantly increases species richness and plant cover and whether hydroseeded species act as starters, facilitating the establishment of the vegetation and quickly disappearing once the communities are established. A hydroseeding success index (HSI, ranging from 0 to 1) was used to assess the relative abundance over time of the 14 species from the hydroseeding mixture. Species richness and cover was significantly higher on embankments (50–70 species per embankment, 80–90% cover) than on roadcuts (6–10 species per roadcut, 18–30% cover). Performance of hydroseeded species was poor from the very beginning (HSI, 0.2–0.3). On embankments, either presence or abundance of hydroseeded species did not significantly vary throughout the study. Both hydroseeded and nonhydroseeded communities exhibited a significant decrease in species richness, a significant increase in plant cover, and a highly dynamic species composition over time, with Sorensen index of 0.3–0.5 between years. There were no significant differences in plant cover, species richness, and aboveground biomass between hydroseeded and nonhydroseeded plots on embankments throughout the study. Our results demonstrate that there are situations in which the use of hydroseeding for revegetation is not needed. Further research should focus on understanding the establishment of autochthonous species and identifying environmental conditions under which the addition of commercial seeds may not be needed, or indeed situations where it may be harmful in suppressing autochthonous species.
Comparison of Leaf Litter Decomposition Rates in Restored and Mature Riparian Forests on the Sacramento River, California
Authors: Borders Brianna D. , Pushnik James C. , Wood David M. 
Published: May 2006

Abstract One of the largest riparian restoration projects in the United States is currently taking place in California on the Sacramento River. Nearly 2,000 ha of land adjacent to the river channel have been revegetated with native riparian species in an effort to reestablish riparian forests. The objective of this study was to compare leaf litter decomposition rates in restored riparian forests to those in mature, naturally established riparian forests, in order to monitor the development of this ecosystem function in restored forests. Leaf litter decomposition rates were measured over 1 year in six restored riparian forests (4, 7, and 9 years old) and two mature remnant riparian forests (>50 years old), in order to test two hypotheses: (1) decomposition rates of restored and mature forests are significantly different and (2) decomposition rates in the chronosequence of restored forests are moving along a trajectory, approaching the decomposition rates characteristic of mature forests as they age. Statistical analyses revealed no significant differences in annual decay rates among the four different forest ages and no trajectory among leaf litter decomposition rates in restored forests. These results suggest that a functionally equivalent process of leaf litter decomposition occurs in both restored and naturally established forests and show promise for the efficiency of nutrient cycling processes in these restored forests.
Small Clusters of Fast‐Growing Trees Enhance Forest Structure on Restored Bottomland Sites
Authors: Twedt Daniel J. 
Published: May 2006

Abstract Despite the diversity of trees in bottomland forests, restoration on bottomland sites is often initiated by planting only a few species of slow‐growing, hard mast–producing trees. Although successful at establishing trees, these young forests are slow to develop vertical structure, which is a key predictor of forest bird colonization. Furthermore, when natural seed sources are few, restored sites may be depauperate in woody species. To increase richness of woody species, maximum tree height, and total stem density, I supplemented traditional plantings on each of 40 bottomland restoration sites by planting 96 Eastern cottonwood (Populus deltoides) and American sycamore (Platanus occidentalis) in eight clusters of 12 trees. First‐year survival of cottonwood stem cuttings (25%) and sycamore seedlings (47%) was poor, but survival increased when afforded protection from competition with weeds. After five growing seasons, 165 of these 320 supplemental tree clusters had at least one surviving tree. Vegetation surrounding surviving clusters of supplemental trees harbored a greater number of woody species, increased stem density, and greater maximum tree height than was found on paired restoration sites without supplemental trees. These increases were primarily accounted for by the supplemental trees.
Ecological Restoration and Global Climate Change
Authors: Harris James A. , Hobbs Richard J. , Higgs Eric , Aronson James 
Published: May 2006

Abstract There is an increasing consensus that global climate change occurs and that potential changes in climate are likely to have important regional consequences for biota and ecosystems. Ecological restoration, including (re)afforestation and rehabilitation of degraded land, is included in the array of potential human responses to climate change. However, the implications of climate change for the broader practice of ecological restoration must be considered. In particular, the usefulness of historical ecosystem conditions as targets and references must be set against the likelihood that restoring these historic ecosystems is unlikely to be easy, or even possible, in the changed biophysical conditions of the future. We suggest that more consideration and debate needs to be directed at the implications of climate change for restoration practice.
Sutured wounds: Factors associated with patient‐rated cosmetic scores
Authors: Lowe Tatiana , Paoloni Richard 
Published: May 2006

AbstractObjective:  To determine the association between wound characteristics, wound management in the ED and patient‐rated cosmetic appearance of sutured wounds. Our hypothesis was that practitioner seniority would most strongly predict outcome.Methods:  Prospective recruitment of patients with lacerations sutured at the primary ED visit was performed. Data collected included patient demographics, wound characteristics and wound management. A standardized telephone questionnaire was administered 14 days and 3 months later. Scar appearance was scored using a verbal rating scale from zero to 10. Data were obtained about suture removal, antibiotic compliance, infection and dehiscence rates at 2 weeks. Associations of variables with cosmetic scores were analysed using multivariate linear regression.Results:  One hundred and thirty‐two patients were evaluated. Mean cosmetic scores were not significantly associated with seniority (P = 0.07). Lacerations repaired by senior practitioners were more likely to result from glass or general trauma (P = 0.007), be shorter (P = 0.03), be cleaned with antiseptic (P = 0.03), not to re‐open (P = 0.01) or require re‐suturing (P = 0.03). Following multivariate regression factors significantly associated with cosmetic scores at 14 days and 3 months were site of injury (P < 0.003) and time from injury to repair (P < 0.009). Wounds of the torso, leg or foot had lower cosmetic scores at both time‐points. An association with age (P = 0.04) was present at 3 months.Conclusions:  Previous research found improvement between short‐term doctor‐rated cosmesis and training beyond internship. Our study demonstrated a non‐significant trend relationship between seniority and patient‐rated outcome, both short and long‐term. However, staff seniority was overshadowed by the site of laceration and time from injury to repair.
Head computed tomography guidelines are being followed
Authors: Brettig Tim , Clooney Megan , Kelly Anne‐Maree , Kerr Debra 
Published: May 2006

AbstractObjective:  Several guidelines have been developed to direct the ordering of head computed tomography (CT) for patients, but most are clinical presentation‐specific. Recently, an integrated guideline for ordering emergent head CT for patients who present to the ED of Western Hospital, Footscray, Victoria, Australia, was developed in response to concerns raised regarding perceived over‐utilization of head CT for ED patients. Our aim was to determine compliance with the guideline.Methods  This was an explicit retrospective medical record review of patients who presented to the ED of Western Hospital between 1/04/2004 and 17/6/2004 and had a head CT as part of their assessment. Clinical information for these cases was compared with guideline recommendations. Data are described by descriptive statistics.Results  Of the 231 cases that were included in the study, 65 (28.1%, 95% confidence interval 23–35%) had abnormal CT findings. Guidelines were adhered to in 217 (93.9%, 95% confidence interval 91–97%) cases. For the cases where the guidelines were not adhered to (14; [6.1%]), there was only one abnormal scan the clinical significance of which is not clear.Conclusion  The study found that compliance with head CT guideline was high. This suggests that the guideline is both clinically relevant and supported by ED doctors or conversely that the guideline is concordant with existing ordering practices of the ED.
NexTemp thermometer can be used interchangeably with tympanic or mercury thermometers for emergency department use
Authors: Rajee Mani , Sultana Ron V 
Published: May 2006

AbstractObjectives  To determine the agreement between the chemical dot NexTemp thermometer with mercury and tympanic thermometers and the repeatability of measurements using these devices.Methods  A prospective study involving a convenience sample of 194 consenting adult patients presenting to the ED, Freemasons Hospital, East Melbourne, Victoria, Australia. A survey of emergency medical staff was conducted to determine what they considered an acceptable level of agreement and repeatability for a putative new thermometer. The NexTemp thermometer’s performance was judged against this. For each thermometer, a set of two temperature measurements was made in every patient. The sequence of the set of readings (and hence device) was random between patients and the staff member performing one set was blinded to the results of the other two sets of readings in each patient. The method of Bland and Altman was used for assessing agreement and repeatability.Results  Clinicians considered that a new thermometer should exhibit repeatability of ±0.3°C and agree with existing devices within ±0.5°C. The tympanic thermometer had 95% limits of repeatability of −0.8–0.5°C compared with the NexTemp (−0.3–0.4°C) and mercury thermometers (−0.3–0.4°C). The NexTemp thermometer agreed with mercury thermometer within −0.6–0.5°C. The tympanic thermometer agreed with the mercury thermometer within −1.0–1.1°C.Conclusion  Based on temperature measurement only, the NexTemp thermometer can be used interchangeably with current mercury and tympanic thermometers.
Paramedic intubation of patients with severe head injury: a review of current Australian practice and recommendations for change
Authors: Bernard Stephen A 
Published: May 2006

AbstractSecondary brain injury may occur early after severe traumatic brain injury due to hypoxia and/or hypotension. Prehospital care by ambulance paramedics has the goal of preventing and treating these complications and, thus, improving outcomes. In Australia, most ambulance services recommend paramedics attempt endotracheal intubation in patients with severe head injury. Even though most patients with severe head injury retain airway reflexes, most states do not allow the use of appropriate drugs to facilitate intubation. In contrast, recent evidence from trauma registries suggests that this approach may be associated with significantly worse outcomes compared with no intubation. Two states allow intubation facilitated by sedative (but not relaxant) drugs, but this has a low success rate and could worsen brain injury because of a decrease in cerebral perfusion pressure. For road‐based paramedics, the role of rapid sequence intubation is uncertain. Given the risks of this procedure and the lack of proven benefit, this procedure should not be introduced without supportive evidence from randomised, controlled trials. In contrast, for safety reasons, comatose patients transported by helicopter should undergo rapid sequence intubation prior to flight. However, this is not authorised in most states, despite good supportive evidence that this can be safely and effectively undertaken by paramedics. Finally, there is evidence that inadvertent hyperventilation is associated with adverse outcome, yet only two ambulance services use waveform capnography in head injury patients who are intubated. Overall, current paramedic airway practice in most states of Australia is not supported by the evidence and is probably associated with worse patient outcomes after severe head injury. For road‐based paramedics, rapid transport to hospital without intubation should be regarded as the current standard of care. Rapid sequence intubation should be limited to use within appropriate clinical trials, or patients transported by helicopter. For patients who are intubated, waveform capnography is essential to confirm tracheal placement and to prevent inadvertent hyperventilation.
Procedural skills quality assurance among Australasian College for Emergency Medicine fellows and trainees
Authors: McD Taylor David , Harrison Glenn 
Published: May 2006

AbstractObjective:  Presently, no objective quality control mechanism exists for monitoring procedural skills among Australasian College for Emergency Medicine trainees. The present study examined trainee and fellow procedural experience and perceived competency, participation in accredited training courses and support for a procedural logbook.Methods:  A cross‐sectional mail survey of Australasian College for Emergency Medicine advanced trainees and fellows was performed. Experience and perceived competency in 23 common and important ED procedures were examined.Results:  In total, 202 fellows and 264 trainees responded (overall response rate 39.0%). Overall, fellow procedural experience and perceived competency were reasonable. However, some fellows had never performed a number of procedures including some common procedures (e.g. nasal packing, fracture reduction) and there were reports of ‘very poor’ competency for 17 (73.9%) procedures. Trainee experience and perceived competency were less than the fellows but showed similar patterns. Perceived numbers of each procedure required to achieve competency varied considerably between the procedures and among the respondents. However, there were no significant differences in the perceived numbers reported by the trainees and the fellows (P > 0.05). Variable proportions of trainees and fellows had undertaken courses that incorporated procedural skills training. More fellows (75.7%, 95% confidence interval 69.1–81.4) than trainees (59.9%, 95% confidence interval 53.6–65.8) supported the use of a procedural logbook (P = 0.003).Conclusions:  Lack of experience in some procedures among some fellows, especially commonly performed procedures, might represent a deficiency in existing quality assurance mechanisms for procedural skills training. Greater participation in skills courses, to improve experience in difficult and uncommonly encountered procedures, is recommended. Improved quality assurance mechanisms, including a procedural logbook, should be considered.
Medical student education in emergency medicine: New model from South Africa
Authors: MacFarlane Campbell , Green‐Thompson Lionel 
Published: May 2006

See also pp. 219–220 AbstractEmergency medicine is a new specialty in South Africa. Postgraduate training, degrees and diplomas have been introduced and this should make a significant difference, in due course, to emergency care in the country. The University of the Witwatersrand, Johannesburg, South Africa, like many universities in Australia, embarked upon a Graduate Entry Medical Programme. This implied significant curriculum change and gave opportunity for the development of formal emergency medicine training for students, for the first time. After considerable debate over the needs of the graduate in South Africa a new block was developed, called the Acute and Perioperative Care block. This encompasses forensic medicine, emergency medicine, trauma and anaesthetics. The training is integrated and progressive. No similar programme has been detected elsewhere. At the end of the first year there is considerable satisfaction on the part of both teachers and students and many of the students, finding the module exciting, have indicated a wish to become involved in emergency medicine in the future. The structure of the course is laid out and might be of relevance to colleagues with an interest in medical education.