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Articles 121 - 150 of 723
Full-Text Articles in Physical Sciences and Mathematics
Soil‐Plant Indicators For Determining The Impact Of Management On The Stability Of Grasslands In Cattle Exploitation, Sandra Lok, Gustavo Crespo, E. Frómeta, S. Fraga
Soil‐Plant Indicators For Determining The Impact Of Management On The Stability Of Grasslands In Cattle Exploitation, Sandra Lok, Gustavo Crespo, E. Frómeta, S. Fraga
IGC Proceedings (1997-2023)
No abstract provided.
Productivity Potential And Seasonality Of Five Grass Species Under Varying Nitrogen Levels At Three Latitudes In Ireland, D. Mcgilloway, Trevor J. Gilliland
Productivity Potential And Seasonality Of Five Grass Species Under Varying Nitrogen Levels At Three Latitudes In Ireland, D. Mcgilloway, Trevor J. Gilliland
IGC Proceedings (1997-2023)
No abstract provided.
Spatial And Temporal Variation Of Nutrients In The Great Lakes-St. Lawrence Basin: Implications For Primary Production In Stream Ecosystems, Nolan Pearce
Electronic Thesis and Dissertation Repository
Growing human populations and associated land use activities has increased the amount of nutrients delivered to surface waters. Eutrophication from the over-enrichment of nitrogen and phosphorus has degraded ecosystem conditions in streams, lakes, and coastal areas worldwide. Thus, the management of anthropogenic nutrient loading is a global concern. This thesis employed a combination of field and experimental research to provide watershed managers with information on the spatial and temporal patterns in stream nutrient enrichment, and the associated ecological effects of anthropogenic nutrient loading in the Great Lakes-St. Lawrence basin. Four studies were completed to address this research goal. First, I …
Fire And Vegetation Change In Coastal Grasslands, South Africa, Kevin P. Kirkman, B. P. A. Dalton
Fire And Vegetation Change In Coastal Grasslands, South Africa, Kevin P. Kirkman, B. P. A. Dalton
IGC Proceedings (1997-2023)
No abstract provided.
Sustainability And Optimization Of Rangeland Uses: Issues Of Perspective And Scale, T. L. Thurow
Sustainability And Optimization Of Rangeland Uses: Issues Of Perspective And Scale, T. L. Thurow
IGC Proceedings (1997-2023)
No abstract provided.
Law School News: Dennis W. Nixon: Doctor Of Laws, Honoris Causa 05-09-2020, Roger Williams University School Of Law
Law School News: Dennis W. Nixon: Doctor Of Laws, Honoris Causa 05-09-2020, Roger Williams University School Of Law
Life of the Law School (1993- )
No abstract provided.
Examining The Northern Shrimp Fishery In A Changing Gulf Of Maine, Ashley N. Charleson
Examining The Northern Shrimp Fishery In A Changing Gulf Of Maine, Ashley N. Charleson
Electronic Theses and Dissertations
Northern Shrimp (Pandalus borealis) once supported a key commercial fishery in the State of Maine. Since its closure in 2013, the stock has remained in a particularly vulnerable state following recruitment failure, overfishing, and rising water temperatures. Furthermore, without this source of supplemental income, local fishermen have also experienced financial stress following unstable fishing conditions in other fisheries. The collective goal of this research project was to assess factors impacting the feasibility of reopening and maintaining this vulnerable winter fishery. These goals are addressed over 4 chapters. Chapter two offers insight regarding what is most often omitted from the regulatory …
Modelling Eurasian Beaver Foraging Habitat And Dam Suitability, For Predicting The Location And Number Of Dams Throughout Catchments In Great Britain, Hugh A. Graham, Alan Puttock, William W. Macfarlane, Joseph Michael Wheaton, Jordan T. Gilbert, Róisín Campbell-Palmer, Mark Elliott, Martin J. Gaywood, Karen Anderson, Richard E. Brazier
Modelling Eurasian Beaver Foraging Habitat And Dam Suitability, For Predicting The Location And Number Of Dams Throughout Catchments In Great Britain, Hugh A. Graham, Alan Puttock, William W. Macfarlane, Joseph Michael Wheaton, Jordan T. Gilbert, Róisín Campbell-Palmer, Mark Elliott, Martin J. Gaywood, Karen Anderson, Richard E. Brazier
Watershed Sciences Faculty Publications
Eurasian beaver (Castor fiber) populations are expanding across Europe. Depending on location, beaver dams bring multiple benefits and/or require management. Using nationally available data, we developed: a Beaver Forage Index (BFI), identifying beaver foraging habitat, and a Beaver Dam Capacity (BDC) model, classifying suitability of river reaches for dam construction, to estimate location and number of dams at catchment scales. Models were executed across three catchments, in Great Britain (GB), containing beaver. An area of 6747 km2 was analysed for BFI and 16,739 km of stream for BDC. Field surveys identified 258 km of channel containing beaver …
Effect Of Various Sowing Dates On The Management Of Wilt Of Guar (Cyamopsis Tetragonaloba L.), Upasana Rani, Simranjit Singh, Davinderpal Singh
Effect Of Various Sowing Dates On The Management Of Wilt Of Guar (Cyamopsis Tetragonaloba L.), Upasana Rani, Simranjit Singh, Davinderpal Singh
IGC Proceedings (1997-2023)
Cluster bean [Cyamopsis tetragonoloba (L.) Taub.], commonly known as guar, is a member of Leguminosae (Fabaceae) family. It is a short duration, drought resistant, low investment and high return cash crop. In Punjab, it is one of the important legume crop grown on about 9514 ha with production of 0.24 million ton (Anonymous, 2013). It can be grown in mixture with bajra and jowar but pure crop of guar supplies highest tonnage of palatable nutritious green fodder for longer duration without much deterioration in quality with the age of the crop. It is rich in nutrients with crude protein …
Soil And Water Conservation And Integrated Management In Watershed Ecosystem Of The Loess Plateau, China, Guobin Liu, Gaolin Wu, Guoliang Wang, David Mitchell
Soil And Water Conservation And Integrated Management In Watershed Ecosystem Of The Loess Plateau, China, Guobin Liu, Gaolin Wu, Guoliang Wang, David Mitchell
IGC Proceedings (1997-2023)
The Loess Plateau is well known for severe soil erosion and ecosystem degradation. The key issues in this region are the food security (grain), ecological security and a sustainable economy. This paper reviews a range of studies on ecological restoration, and management and the benefit at watershed scale on the Loess Plateau. This includes several successful cases and failures in soil conservation. The paper presents practical soil conservation measures and related benefit analysis, and discusses some effective methods adopted in soil erosion control, research directions and future perspectives for the Loess Plateau.
Remote Sensing And Gis Techniques For Forage Production Assessment And Management Of Northern Chhattisgarh In India, Nur Salim Ekka, S. K. Gupta
Remote Sensing And Gis Techniques For Forage Production Assessment And Management Of Northern Chhattisgarh In India, Nur Salim Ekka, S. K. Gupta
IGC Proceedings (1997-2023)
Grasslands play a vital ecological and environmental role in global carbon balance and climate change. In the prairie provinces of Canada, grasslands occupy approximately 25 M ha of the land base and provide a valuable resource to the multi-billion dollar cattle industry. In recent years, remote sensing technology has been applied for estimating the fractional cover of arid grasslands and savannah ecosystems (Asner and Heidebrecht, 2003; Marsett et al. 2006; Guerschman et al., 2009). Grassland, a specific ecosystem, occurs naturally on all continents excluding Antarctica (White et al., 2000). Remote sensing imagery needs to be converted into tangible information …
Megathermic Spontaneous Grasses In The Mid Valley Ecotone, Rio Negro Of Argentina, Klich María Guadalupe
Megathermic Spontaneous Grasses In The Mid Valley Ecotone, Rio Negro Of Argentina, Klich María Guadalupe
IGC Proceedings (1997-2023)
The vegetation in the ecotone of mid valley in Río Negro (Argentina) varies in community composition and plant cover depending on the annual precipitation regime and on the temperature requirements of the plants species. The megathermic forage grasses are characterized by a C4 photosynthetic metabolism, their production is concentrated in summer, they are tolerant to drought, efficient in the use of water and nitrogen, they have a high potential for dry matter production and the nutritional quality necessary to meet the demands of cattle. North Patagonia is a semiarid temperate region with hot, dry summers and with forage resources …
The Impact Of Different Herdsmen’S Size On Grassland Ecosystem Of Eastern Transect In Tibetan Plateau: A Case Study From Maqu, Huilan Wei, Xin Zong, Da Guo, Longfei Yan, Yang Liu
The Impact Of Different Herdsmen’S Size On Grassland Ecosystem Of Eastern Transect In Tibetan Plateau: A Case Study From Maqu, Huilan Wei, Xin Zong, Da Guo, Longfei Yan, Yang Liu
IGC Proceedings (1997-2023)
In order to address grassland degradation, an individual contracting system, or namely, single-household rangeland management, based on Garrett Hardin theory of “tragedy of the commons”, had been conducted in Maqu since 1980s. Despite the support of local government, such a well-intentioned system saw little fruits on managing degradation, encountering extensive frustration due to its poor practical outcomes. Meanwhile, joint-household rangeland management, as an inheritance of locality-based management, has been vigorously pursued and has played an important role on Maqu’s grassland management system. In order to better illustrate the impact of size on managing the grassland ecosystem, an experiment was set …
Impact Of Seagrass Establishment, Industrialization And Coastal Infrastructure On Seagrass Biogeochemical Sinks [Dataset], Oscar Serrano, Paul Lavery, James Bongiovanni, Carlos Duarte
Impact Of Seagrass Establishment, Industrialization And Coastal Infrastructure On Seagrass Biogeochemical Sinks [Dataset], Oscar Serrano, Paul Lavery, James Bongiovanni, Carlos Duarte
Research Datasets
The database compiles published data (in Serrano et al. 2020, Marine Environmental Research, in press) on biogeochemical characteristics (density, organic carbon, stable carbon isotopes, chemical element and sediment grain size) of cores from Posidonia sinuosa soil in Cockburn Sound, Western Australia. Pb-210 concentrations of the first 20 cm are included along with C-14 raw ages.
Enquiries about the dataset may be sent to Oscar Serrano: o.serranogras@ecu.edu.au
Exploring Strategies For Enforcing Cybersecurity Policies, Bayo Olushola Omoyiola
Exploring Strategies For Enforcing Cybersecurity Policies, Bayo Olushola Omoyiola
Walden Dissertations and Doctoral Studies
Some cybersecurity leaders have not enforced cybersecurity policies in their organizations. The lack of employee cybersecurity policy compliance is a significant threat in organizations because it leads to security risks and breaches. Grounded in the theory of planned behavior, the purpose of this qualitative case study was to explore the strategies cybersecurity leaders utilize to enforce cybersecurity policies. The participants were cybersecurity leaders from 3 large organizations in southwest and northcentral Nigeria responsible for enforcing cybersecurity policies. The data collection included semi-structured interviews of participating cybersecurity leaders (n = 12) and analysis of cybersecurity policy documents (n = 20). Thematic …
European Green Crab Mitigation In Whatcom County, Patty Barry, Melissa Browning, Alexis Bryson,, Harrison Fuchs, Etilet Maipi
European Green Crab Mitigation In Whatcom County, Patty Barry, Melissa Browning, Alexis Bryson,, Harrison Fuchs, Etilet Maipi
WWU Honors College Senior Projects
This report presents a background on the invasive European green crab ( Carcinus maenas ), describes a variety of techniques to monitor and manage their presence in the region, and puts forth several comprehensive strategies for mitigating a potential invasion of C. maenas in the Salish Sea. C. maenas was likely initially introduced to the Pacific coast of the United States as larvae carried in ballast water, though they are also spread as larval by currents and as hitchhikers in seafood transport. C. maenas tolerates a wide range of salinities, temperatures, and habitats, they prey on virtually any available species, …
Designing High-Yielding, High-Diversity And Low-Input Temporary Grasslands, Karen Søegaard, Tine B. Mortensen, Jørgen Eriksen
Designing High-Yielding, High-Diversity And Low-Input Temporary Grasslands, Karen Søegaard, Tine B. Mortensen, Jørgen Eriksen
IGC Proceedings (1997-2023)
Species-rich swards have received increasing interest due to their focus on ecosystem services, animal welfare and product quality. However, in high-yielding swards the proportion of herbs is often limited and there is little knowledge of their management. Seed mixture composition, cutting frequency, fertilization and grazing/cutting strategies were examined over 4 years in 3 experiments to quantify their effects on herbage yield and botanical composition. Inclusion of herbs in the sward gave similar or higher annual yields but swards established with 100% herbs depended on the presence of a driver species. The effects of management differed between species. Herb content in …
Observable Persistent Effects Of Habitat Management Efforts In The Ozark Highlands After 10 Years, Maxwell Carnes-Mason
Observable Persistent Effects Of Habitat Management Efforts In The Ozark Highlands After 10 Years, Maxwell Carnes-Mason
Graduate Theses and Dissertations
I investigated the lasting impacts of a management plan designed to improve oak regeneration and benefit wildlife in the Ozark Highlands in Madison, Co., AR. To assess the efficacy of the management plan, I used variables relevant to the success and establishment of oak trees. Controlled burns and selective logging were used to thin the canopy, increase ground level productivity, and increase the abundance of small mammals. I used measurements of overstory and understory densities, light availability, and the density of mice in the genus Peromyscus across time to look at the lasting impacts of management. Different treatment plots were …
A Model Explaining Medusahead Invasion And Novel Targeted Grazing Approaches Of Control, Casey N. Spackman
A Model Explaining Medusahead Invasion And Novel Targeted Grazing Approaches Of Control, Casey N. Spackman
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Medusahead (Taeniatherum caput-medusae (L.) Nevski) is currently one of the biggest threats to rangelands and livestock operations in the Western US. High silica concentrations in medusahead contribute to its invasiveness. I developed a model to explain how silica is involved in the invasion process, and attempted to manipulate silica to increase use of the grass by livestock. Experiments were conducted to determine: 1) whether rotational grazing on established forages of improved nutritional quality would provide supplemental nutrients to increase cattle use of medusahead; 2) evaluate intake of and preference for medusahead treated with a glyphosate herbicide at different rates …
Spatial And Seasonal Differences In The Top Predators Of Easter Island: Essential Data For Implementing The New Rapa Nui Multiple‐Uses Marine Protected Area, Naiti A. Morales, Erin E. Easton, Alan M. Friedlander, Euan S. Harvey, Rodrigo Garcia, Carlos F. Gaymer
Spatial And Seasonal Differences In The Top Predators Of Easter Island: Essential Data For Implementing The New Rapa Nui Multiple‐Uses Marine Protected Area, Naiti A. Morales, Erin E. Easton, Alan M. Friedlander, Euan S. Harvey, Rodrigo Garcia, Carlos F. Gaymer
School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations
- Reef fishes are an important component of marine biodiversity, and changes in the composition of the assemblage structure may indicate ecological, climatic, or anthropogenic disturbances. To examine spatial differences in the reef fish assemblage structure around Easter Island, eight sites were sampled during autumn and summer 2016–2017 with baited remote underwater video systems.
- To determine seasonal changes, quarterly (seasonal) sampling was conducted at five of those eight sites. Fifteen pelagic species of fishes were recorded during this study, some of which have not previously been recorded in scuba surveys, including the Galapagos shark (Carcharhinus galapagensis, Snodgrass & Heller, …
Rangeland Management During Drought: Assessing Social-Ecological And Cognitive Indicators Of Ranchers’ Adaptive Capacity, Tonya Haigh
School of Natural Resources: Dissertations, Theses, and Student Research
Rangeland managers face challenges to adapt to climate extremes, and research is needed on how to support their adaptive capacity for managing climate risk. This study evaluates adaptive capacity using an integrated vulnerability and resilience conceptual model and three cognitive behavioral models. Overarching research questions focus on the relationship between protective action and impacts and the best predictors of taking action in response to drought. Three studies address these questions, using quantitative data collected from two post-drought surveys of rangeland-based livestock managers in the Northern Great Plains of the U.S. The studies find evidence of the roles of social-ecological sources …
The Effectiveness Of Mobile Eye-Tracking To Enhance Guided Show Cave Experiences, Jenna Michele Hammond
The Effectiveness Of Mobile Eye-Tracking To Enhance Guided Show Cave Experiences, Jenna Michele Hammond
Masters Theses & Specialist Projects
Karst terrains are landscapes with a distinctive hydrology and set of landforms that arise from a combination of high bedrock solubility and well-developed secondary (fracture) porosity. Karst areas are easily polluted due to the rapid transport of unfiltered percolating water through the systems. While many individuals are able to identify karst landforms such as sinkholes and caves, an understanding of the interconnectedness of the surface and subsurface in karst landscapes, as well as the vulnerability of karst areas to degradation, is often limited. Show caves, which are caves made accessible to visitation by humans through built infrastructure, can serve as …
Ecological Interventions To Prevent And Manage Zoonotic Pathogen Spillover, Susanne H. Sokolow, Nicole Nova, Kim M. Pepin, Alison J. Peel, Juliet R.C. Pulliam, Kezia Manlove, Paul C. Cross, Daniel J. Becker, Raina K. Plowright, Hamish Mccallum, Giulio A. De Leo
Ecological Interventions To Prevent And Manage Zoonotic Pathogen Spillover, Susanne H. Sokolow, Nicole Nova, Kim M. Pepin, Alison J. Peel, Juliet R.C. Pulliam, Kezia Manlove, Paul C. Cross, Daniel J. Becker, Raina K. Plowright, Hamish Mccallum, Giulio A. De Leo
USDA Wildlife Services: Staff Publications
Spillover of a pathogen from awildlife reservoir into a human or livestock host requires the pathogen to overcome a hierarchical series of barriers. Interventions aimed at one or more of these barriers may be able to prevent the occurrence of spillover. Here, we demonstrate how interventions that target the ecological context in which spillover occurs (i.e. ecological interventions) can complement conventional approaches like vaccination, treatment, disinfection and chemical control. Accelerating spillover owing to environmental change requires effective, affordable, durable and scalable solutions that fully harness the complex processes involved in cross-species pathogen spillover.
This article is part of the theme …
A Review Of The Global Commercial Cephalopod Fishery, With A Focus On Apparent Expansion, Changing Environments, And Management, Corey Clark
HCNSO Student Capstones
Cephalopods are both important predators and prey in many marine environments and important fishery resources in many countries. The global fishery has expanded almost continuously from landings of 580,000 metric tonnes in 1950 to over 4 m.t. in 2007. Cephalopods are ecological opportunists with highly plastic biological characteristics and varied population dynamics. Nearly all commercially harvested species are short-lived and can reproduce quickly, enabling them to evolve more rapidly under high selection pressure relative to many fish competitors and predators. As a result, they may have the biological means to be successful under conditions of long-term global climate change. This …
Software Acquisition And Project Management (Ksu), Rebecca Rutherfoord, Dawn Tatum, Susan Vandeven, Richard Halstead-Nussloch, James Rutherfoord, Zhigang Li
Software Acquisition And Project Management (Ksu), Rebecca Rutherfoord, Dawn Tatum, Susan Vandeven, Richard Halstead-Nussloch, James Rutherfoord, Zhigang Li
Computer Science and Information Technology Grants Collections
This Grants Collection for Software Acquisition and Project Management was created under a Round Eleven ALG Textbook Transformation Grant.
Affordable Learning Georgia Grants Collections are intended to provide faculty with the frameworks to quickly implement or revise the same materials as a Textbook Transformation Grants team, along with the aims and lessons learned from project teams during the implementation process.
Documents are in .pdf format, with a separate .docx (Word) version available for download. Each collection contains the following materials:
- Linked Syllabus
- Initial Proposal
- Final Report
King William County, Virginia Shoreline Inventory Data 2019, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Jessica Hendricks, Carl Hershner, Evan Hill
King William County, Virginia Shoreline Inventory Data 2019, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Jessica Hendricks, Carl Hershner, Evan Hill
Data
The 2019 Inventory for King William County was generated using on-screen, digitizing techniques in ArcGIS® -ArcMap v10.4.1 while viewing conditions observed in 2017 imagery from the Virginia Base Mapping Program (VBMP), Google Earth, and Bing high resolution oblique imagery. Five GIS shapefiles are developed. The first describes land use and bank conditions (KingWilliam_lubc_2019). The second portrays the presence of beaches (KingWilliam_beach_2019). The third reports shoreline structures that are described as arcs or lines (e.g. riprap) (KingWilliam_sstru_2019). The fourth shapefile includes all structures that are represented as points (e.g. piers) (KingWilliam_astru_2019). The Tidal Marsh Inventory is included as the fifth file …
King And Queen County, Virginia Shoreline Inventory Data 2019, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Jessica Hendricks, Carl Hershner, Evan Hill
King And Queen County, Virginia Shoreline Inventory Data 2019, Marcia Berman, Karinna Nunez, Sharon Killeen, Tamia Rudnicky, Julie Bradshaw, Jessica Hendricks, Carl Hershner, Evan Hill
Data
The 2019 Inventory for King and Queen County was generated using on-screen, digitizing techniques in ArcGIS® -ArcMap v10.4.1 while viewing conditions observed in 2017 imagery from the Virginia Base Mapping Program (VBMP), Google Earth, and Bing high resolution oblique imagery. Five GIS shapefiles are developed. The first describes land use and bank conditions (kq_lubc_2019). The second portrays the presence of beaches (kq_beach_2019). The third reports shoreline structures that are described as arcs or lines (e.g. riprap) (kq_sstru_2019). The fourth shapefile includes all structures that are represented as points (e.g. piers) (kq_astru_2019). The Tidal Marsh Inventory is included as the fifth …
Employer Strategies For Improving Employee Work-Life Balance, Vernessa Lashawn Johnson-Hoffman
Employer Strategies For Improving Employee Work-Life Balance, Vernessa Lashawn Johnson-Hoffman
Walden Dissertations and Doctoral Studies
Senior leaders who fail to implement work-life balance strategies may experience reduced profits and sustainability challenges. This single case study explored employers' strategies for improving employee work-life balance. The population for the study included 4 senior leaders of a hospice care agency in North Carolina who successfully implemented employee work-life balance strategies. Data were collected from semistructured interviews and from the review of company documents, website, and social media pages. The conceptual framework for the study was the transformational leadership theory. The trustworthiness of interpretations was supported by member checking. Four themes emerged from inductive analysis of the data: a …
Leadership Strategies For Improving Employee Engagement In The Information Technology Industry, Geneva L. Reed
Leadership Strategies For Improving Employee Engagement In The Information Technology Industry, Geneva L. Reed
Walden Dissertations and Doctoral Studies
Disengaged employees in the information technology industry lead to decreased productivity, increased absenteeism, poor job performance, higher employee turnover, and reduced organizational effectiveness. The purpose of this multiple case study was to explore the leadership strategies that information technology leaders used to improve employee engagement. The transformational leadership theory was the conceptual framework for this study. Data were collected through semistructured interviews with 3 leaders of information technology companies in Illinois and a review of company documents. Data were analyzed through thematic analysis and using Yin's 5-step process of compiling, disassembling, reassembling, interpreting, and concluding data. The 3 emergent themes …
Post-Wildfire Recovery Of An Upland Oak-Pine Forest On The Cumberland Plateau, Kentucky, Usa, Devin E. Black, Zachary W. Poynter, Claudia A. Cotton, Suraj Upadhaya, David D. Taylor, Wendy Leuenberger, Beth A. Blankenship, Mary A. Arthur
Post-Wildfire Recovery Of An Upland Oak-Pine Forest On The Cumberland Plateau, Kentucky, Usa, Devin E. Black, Zachary W. Poynter, Claudia A. Cotton, Suraj Upadhaya, David D. Taylor, Wendy Leuenberger, Beth A. Blankenship, Mary A. Arthur
Forestry and Natural Resources Faculty Publications
Background: Many forests within the southern Appalachian region, USA, have experienced decades of fire exclusion, contributing to regeneration challenges for species such as oaks (Quercus spp. L.) and pines (Pinus spp. L.), and threatening the maintenance of oak-dominated forests in the future. While the use of prescribed fire as a forest management tool is increasing within this region, there remains a lack of information on the potential role of wildfire. A wildfire within the Daniel Boone National Forest, Kentucky, USA, provided an opportunity to investigate how wildfire affected forest vegetation response.
Results: We examined the effects of fire …