Apparent long-term declines of white-winged and surf scoter (<i>Melanitta fusca </i> and <i>M. perspicillata</i>) populations in the northern boreal forest have raised concern for these sea duck species. Reasons for population declines are not well understood but some evidence suggests that factors associated with events on the breeding grounds may be responsible. Breeding ground changes could adversely affect abiotic or biotic characteristics of upland or wetland habitats or key food sources for breeding females or ducklings, which in turn may lower productivity or recruitment. Like most boreal-nesting ducks, virtually nothing is known about wetland habitat preferences of scoters. Determining habitat features that scoters need to breed successfully, and how habitat changes in the boreal forest affect scoters, is an important step in understanding their ecology and developing conservation initiatives. Thus, my overall goal was to look for evidence of habitat selection in scoters at two spatial scales by characterizing biotic and abiotic features of areas used by scoter pairs and broods, and comparing these features with those of areas not used by scoters. Habitat characteristics and scoter use of wetlands in recently burned forest was also contrasted with unburned forest to determine whether habitat change caused by fire could affect patterns of habitat use by scoters.<p> I used remote sensing data as a tool to delineate coarse-scale patterns of habitat use by scoter pairs and broods. Results indicate that although scoters may not settle on wetlands in areas dominated by burned vegetation two years following the fire, three years after the fire I found no difference in scoter pair or brood use between wetlands in burned and unburned upland. I found that surf and white-winged scoter pairs often co-occurred on wetlands. I was unable to find any evidence to support the prediction that scoters prefer wetlands with irregular shorelines that might enhance pair isolation and offer greater protection to ducklings from severe winds and wave action. <p> Based on fine-scale wetland habitat characteristics, scoter pairs and broods used wetlands with more abundant food, a finding that is consistent with many other waterfowl studies. However, unlike some previous waterfowl studies, I did not find a consistent correlation between total phosphorus levels and amphipod abundance or wetland use by scoters. Very high total nitrogen to total phosphorus ratios in sampled wetlands lead me to speculate that wetlands in my study area may be phosphorus limited. I did not detect a difference in fine-scale features of wetlands surrounded by burned versus unburned vegetation. This study of scoters in the northern boreal forest was among the first to determine why scoters use specific wetlands or areas and not others.

Fire plays an important role in forest ecosystem management depending on the dual character of it. It should be managed and supervised effectively. In this particular study, the study area was located in the north part of Gävleborg County in Sweden, which is in a high- latitude region. Seven factors, divided into natural factors and human caused factors, were extracted from digital elevation model (DEM), classified land use map and feature shape files provided by National Land Survey of Sweden (Lantmäteriet). Two different weighting schemes for the factors were determined by the Analytic Hierarchy Process (AHP) method. With the help of ArcGIS 9.3 and Erdas 9.3, two classified result maps were obtained, where forest fire risk ranks were shown as five classes, very low, low, moderate, high and very high. The 43 fire incidents in the year 2007 and 2008 recorded by Global Fire Management System were used to evaluate the results. The results show that the higher rank the region is, the larger is the probability for forest fire risk and higher the risk to spread the fire. Furthermore, according to the occurrence time of the fire incidents, the period of time from end of May to beginning of June was generalized as a dangerous period for forest fire risk in this study area. After analyzing and discussing, even if there might be some uncertainties caused by variable selection, resolution problem and weighting schemes, the results were generally reliable.

Climate change has begun to affect the frequency, intensity, and duration of weather related disaster events. This trend may foster a greater probability of encountering 2 or more disaster events simultaneously, increasing the potential to deplete emergency resources. Using Canadian forest fire management as a focal point, this research has determined the extent to which forest fire resource sharing (resources being equipment, fire fighter teams, planes, etc.) has been able to mitigate the impacts of simultaneous forest fire events induced by climate change. Provincial and territorial forest fire management agencies are responsible for forest fire suppression within their jurisdictions, but when fires exceed their suppression capabilities they may request resources from other agencies using resource sharing agreements including: Compact agreements with American States, other international agreements and agreements initiated through the Canadian Interagency Forest Fire Center (CIFFC). If the potential for simultaneous forest fires is neglected, excess fire activity may overwhelm the resource sharing structure. A historical analysis, 2 case studies, and a survey were employed to uncover information regarding simultaneous forest fires. Moreover, an examination of other resource sharing disciplines was used to uncover new ways of approaching resource sharing issues. The results of this study show that simultaneous fire events have overwhelmed the resource sharing system (during at least two years 1998 and 2003) and that modifications are needed to prepare for the potential increase in forest fire frequency.

Apparent long-term declines of white-winged and surf scoter (<i>Melanitta fusca </i> and <i>M. perspicillata</i>) populations in the northern boreal forest have raised concern for these sea duck species. Reasons for population declines are not well understood but some evidence suggests that factors associated with events on the breeding grounds may be responsible. Breeding ground changes could adversely affect abiotic or biotic characteristics of upland or wetland habitats or key food sources for breeding females or ducklings, which in turn may lower productivity or recruitment. Like most boreal-nesting ducks, virtually nothing is known about wetland habitat preferences of scoters. Determining habitat features that scoters need to breed successfully, and how habitat changes in the boreal forest affect scoters, is an important step in understanding their ecology and developing conservation initiatives. Thus, my overall goal was to look for evidence of habitat selection in scoters at two spatial scales by characterizing biotic and abiotic features of areas used by scoter pairs and broods, and comparing these features with those of areas not used by scoters. Habitat characteristics and scoter use of wetlands in recently burned forest was also contrasted with unburned forest to determine whether habitat change caused by fire could affect patterns of habitat use by scoters.<p> I used remote sensing data as a tool to delineate coarse-scale patterns of habitat use by scoter pairs and broods. Results indicate that although scoters may not settle on wetlands in areas dominated by burned vegetation two years following the fire, three years after the fire I found no difference in scoter pair or brood use between wetlands in burned and unburned upland. I found that surf and white-winged scoter pairs often co-occurred on wetlands. I was unable to find any evidence to support the prediction that scoters prefer wetlands with irregular shorelines that might enhance pair isolation and offer greater protection to ducklings from severe winds and wave action. <p> Based on fine-scale wetland habitat characteristics, scoter pairs and broods used wetlands with more abundant food, a finding that is consistent with many other waterfowl studies. However, unlike some previous waterfowl studies, I did not find a consistent correlation between total phosphorus levels and amphipod abundance or wetland use by scoters. Very high total nitrogen to total phosphorus ratios in sampled wetlands lead me to speculate that wetlands in my study area may be phosphorus limited. I did not detect a difference in fine-scale features of wetlands surrounded by burned versus unburned vegetation. This study of scoters in the northern boreal forest was among the first to determine why scoters use specific wetlands or areas and not others.

Below-ground effects during forest fires are some of the important issues forest managers consider when conducting prescribed fire programs. Heat transfer models in soil are needed to predict temperatures in soil during forest fires. Many of the heat transfer models in soil that include the effects of moisture are complex and in most cases do not have very good predictive abilities. Researchers believe that simple heat transfer models in soil that neglect the effects of moisture could have very good predictive abilities.<p>This study presents a one-dimensional numerical model of heat transfer in dry homogenous sand. Both constant and temperature dependent thermal properties of the sand were used in order to determine which had better predictive abilities. The constant thermal properties model was also extended to a model of two-layer dry soil. A computer code written in Fortran was used to generate results from the model. A number of experiments were conducted with dry sand to validate the model. A comparison of the numerical and experimental results indicated that the temperature dependent properties model had better predictive abilities than the constant properties model. The models were found to do a good job of predicting temperature profiles and depth of lethal heat penetration at heat fluxes indicative of forest fires.<p>Experiments were also conducted to determine the effect of moisture on temperature profiles and the depth of lethal heat penetration in sand and the effect of inorganics on the spread rate of smoldering combustion in peat moss. An experimental correlation of the effects of inorganic content on the spread rate of smoldering combustion in peat moss was developed. Additionally, laboratory methods of validating models of heat transfer in soil were developed with the aim of limiting the dependence on full scale testing. Specifically the use of the cone calorimeter for validating numerical models of heat transfer in soil and the responses of forest floor soil and laboratory created soil samples to heat input were compared. The results indicated that the laboratory created soil did a very good job of mimicking the heat response of the forest floor soil with a maximum difference in lethal heat penetration of 4%.

Wildfires in Canada and around the world are increasing in frequency each year from factors such as accumulated fuel load, climate changes, and pine beetle infestation. Due to an increased proportion of individuals living in the wildland–urban interface areas within Canada and due to the increasing need for firefighters to fight the growing number of fires that burn each year, the potential threat for humans is also becoming greater. Conducted on the 2009 West Kelowna, British Columbia wildfires, this descriptive, exploratory, qualitative study incorporates quantitative validity measurements to investigate factors related to individual variations in psychological distress and posttraumatic growth (PTG). The findings revealed that perception of control, social support, compounding stressors (i.e., dual roles, ongoing responsibilities and personal issues), and coping methods (i.e., debriefing, humour, self-care behaviours, and reflection) were precursors to psychological health and resilience. Since wildfires are increasing in Canada as well as on a global scale, understanding how they affect residents and firefighting personnel from a mental health perspective is important to research, as it can lead to identifying more effective interventions, better provision of disaster relief services, and increase individual resilience. / xi, 193 leaves ; 29 cm

Almost every year, Aboriginal communities are evacuated from northern regions of Canada to nearby cities because of threats due to forest fires and flooding. In this thesis, I present the perspectives of twenty members of the Hatchet Lake First Nation, who were evacuated from Wollaston Lake in northern Saskatchewan during the summer of 2011. My main research question is, how do residents of Wollaston Lake describe experiences of disruptions to well-being and distress during the evacuation and in the evacuation centers? My methods are qualitative, as I conducted open-ended interviews and participant observation while residing in the community for six weeks during the summer of 2012. Following the approaches of Geertz (2000), Garro (2000), and Mattingly (1998), I engaged in a narrative analysis of these data. Three main themes are evident in community members’ discussions of their experiences. First, participants focus on the ways that the fire and displacement disrupted the well-being of fellow community members and, to a lesser degree, their relationships with the land surrounding their town, and their roles within the community. Residents of Wollaston Lake portray a version of well-being that is rooted in the social, rather than individual, self. The second theme relates to family roles, as mothers, fathers, adult children, and guardians describe the various ways that these roles were disrupted during the fire and evacuation, and the distress elicited by these disruptions. These narratives are indicative of the discrepancies between the circumstances experienced during the fire and evacuation, and the values and behaviors that they associate with family roles. The third theme relates to expectations and blame, as community members recall the various ways that the evacuation failed to meet their expectations, and they attribute blame to those that they deem responsible for these inadequacies. Specifically, community members focus on expectations relating to the handling of the threat of fire, the organization of the evacuation, and their interactions with members of the host communities. These findings indicate the incongruities between current emergency management practices in Saskatchewan and the needs of this community. The implication of these findings is that, in order to minimize distress during future disasters, organizers must develop plans that account for the distinct social norms and vulnerabilities of the communities with which they work.

Climate change has begun to affect the frequency, intensity, and duration of weather related disaster events. This trend may foster a greater probability of encountering 2 or more disaster events simultaneously, increasing the potential to deplete emergency resources. Using Canadian forest fire management as a focal point, this research has determined the extent to which forest fire resource sharing (resources being equipment, fire fighter teams, planes, etc.) has been able to mitigate the impacts of simultaneous forest fire events induced by climate change. Provincial and territorial forest fire management agencies are responsible for forest fire suppression within their jurisdictions, but when fires exceed their suppression capabilities they may request resources from other agencies using resource sharing agreements including: Compact agreements with American States, other international agreements and agreements initiated through the Canadian Interagency Forest Fire Center (CIFFC). If the potential for simultaneous forest fires is neglected, excess fire activity may overwhelm the resource sharing structure. A historical analysis, 2 case studies, and a survey were employed to uncover information regarding simultaneous forest fires. Moreover, an examination of other resource sharing disciplines was used to uncover new ways of approaching resource sharing issues. The results of this study show that simultaneous fire events have overwhelmed the resource sharing system (during at least two years 1998 and 2003) and that modifications are needed to prepare for the potential increase in forest fire frequency.

Η παρούσα εργασία εισάγει τον αναγνώστη στο φαινόμενο των δασικών πυρκαγιών. Στο παραπάνω πλαίσιο, καθοριστικός παράγοντας για την άμεση κατάσβεση των δασικών πυρκαγιών είναι η σωστή χωροθέτηση των πυροσβεστικών οχημάτων. Η βέλτιστη χωροθέτηση στο υπάρχων πρόβλημα επιτυγχάνεται μέσω των μοντέλων κάλυψης. Εφαρμόζονται και συγκρίνονται τα αποτελέσματα με την υπάρχουσα κάλυψη που παρέχεται από την υφιστάμενη χωροθέτηση των περιπολιών από την Πυροσβεστική Υπηρεσία στο νομό Αχαΐας. / -

Fire is a vital part of the taiga ecosystems and as the amount of prescribed fires increases, it is also likely that public awareness and interest in fire increases and thereby also the need for nature interpreters who can perform guided tours in these areas. This report aims to provide guidance for nature interpreters as to what information they should convey while guiding groups of people in taiga forests where fire has occurred. The methods used to study this were: 1) Interviews with conservationists who work with forest fire in some way on what information they think is important to convey and 2) a web survey in which respondents answered questions about their knowledge and feelings about forest fire. Based on the results of the interviews it is concluded that the focus of the guided tour should be on explaining fire as a natural phenomenon of the taiga and its role in the dynamics of the taiga. Based on the result of the web survey it is also concluded that the guide should bear in mind that though the participants of the tour may well be aware that fire is beneficial for the taiga they may not know how and why that is, nor what happens if the taiga does not burn, and some effort should thus be put into explaining those mechanisms. / Eld är en livsviktig del i taigans ekosystem och medan mängden genomförda naturvårdsbränder ökar är det också rimligt att tro att allmänhetens medvetenhet och intresse för brand ökar. Därigenom kan också behovet av guidade turer i brandområden öka. Målet med denna rapport är att ge vägledning till guider om vilken information som bör förmedlas under guidade turer i brandområden. Metoderna för att studera detta var: 1) intervjuer med naturvårdare som på något sätt jobbar med brand och 2) en webbenkät där respondenter svarar på frågor om deras kunskap om, och inställning till, brand. Baserat på resultaten från intervjuerna dras slutsatsen att fokus i de guidade turerna bör ligga på att förmedla att brand är ett naturligt fenomen och vilken roll branden har i taigans dynamik. Baserat på resultatet från webbenkäten dras också slutsatsen att även om deltagarna i turen mycket väl kan vara medvetna om brandens positiva effekter på skogen så vet de kanske inte varför och hur, eller vad som händer om taigan inte brinner. Därför bör kraft även läggas på att förklara dessa mekanismer.