Journal of Ecosystems and Management最新文献_第4页

Use of Airborne Gamma Radiometrics to Infer Soil Properties for a Forested Area in British Columbia, Canada 使用机载伽马辐射法推断加拿大不列颠哥伦比亚省森林地区的土壤性质

Journal of Ecosystems and Management Pub Date : 2013-05-21 DOI: 10.22230/jem.2013v14n1a201

D. Dent, R. MacMillan, Thomas Mayr, W. Chapman, S. Berch

{"title":"Use of Airborne Gamma Radiometrics to Infer Soil Properties for a Forested Area in British Columbia, Canada","authors":"D. Dent, R. MacMillan, Thomas Mayr, W. Chapman, S. Berch","doi":"10.22230/jem.2013v14n1a201","DOIUrl":"https://doi.org/10.22230/jem.2013v14n1a201","url":null,"abstract":"We obtained radiometric data from a public-domain archive maintained by Natural Resources Canada and processed them to produce a ternary image for a portion of the Cariboo region. A field program was used to evaluate what information could be reliably inferred from the available data. This initial investigation confirmed that the radiometrics for this area exhibited consistent and useful patterns to interpret the lithology, mineralogy, depth, and moisture status of the surficial materials. Different colour patterns in the ternary image correlated well with different compositions of the various tills. We noted a clear association between higher values of radioactive emission and more recently deposited aeolian, alluvial, and glaciofluvial sediments that contained higher concentrations of relatively unweathered minerals. We observed a clear pattern of lower emission from wetlands and areas of wet soil. Airborne radiometrics, even at 500-m line spacing, provided invaluable and precise information—not otherwise obtainable—for mapping or modelling spatial variation in properties of the surficial material within the forested study area in British Columbia. We recommend further investigations to develop operational procedures for the use of such data in mapping surficial materials.","PeriodicalId":129797,"journal":{"name":"Journal of Ecosystems and Management","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115758065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Climate Biomonitoring with Lichens in British Columbia’s Inland Temperate Rainforest 不列颠哥伦比亚省内陆温带雨林地衣的气候生物监测

Journal of Ecosystems and Management Pub Date : 2013-04-12 DOI: 10.22230/jem.2013v14n1a193

A. M. MacDonald, D. Coxson, C. Björk

引用次数: 4

Thinning of a Ponderosa Pine/Douglas-Fir Forest in South-Central BC: Impacts on Understorey Vegetation 不列颠哥伦比亚省中南部黄松/道格拉斯冷杉林的间伐:对林下植被的影响

Journal of Ecosystems and Management Pub Date : 2013-04-09 DOI: 10.22230/jem.2013v14n1a187

Kim Ducherer, Y. Bai, Don Thompson, K. Broersma

{"title":"Thinning of a Ponderosa Pine/Douglas-Fir Forest in South-Central BC: Impacts on Understorey Vegetation","authors":"Kim Ducherer, Y. Bai, Don Thompson, K. Broersma","doi":"10.22230/jem.2013v14n1a187","DOIUrl":"https://doi.org/10.22230/jem.2013v14n1a187","url":null,"abstract":"The ponderosa pine and Douglas-fir forests in the Interior of British Columbia, Canada, are facing problems such as forest in-growth mainly due to fire suppression, reducing grazing land area. This study focused on the use of thinning to reduce forest stand density and restore understorey species diversity and increase aboveground biomass productivity. Data were collected over a 4-year period. Species richness and diversity were generally lower under the canopy of ponderosa pine and Douglas-fir trees than outside the canopy. Species diversity was reduced by thinning at one site but unaffected by thinning at the other. Total understorey biomass increased up to 80% within 3 to 4 years after thinning. Depending on site and year, biomass production of one or more plant groups, such as forb, shrub, or graminoid, increased. Reduction in litter depth was observed at both sites due to the removal and/or reduction of needle sources. Variations in species composition existed among blocks and between sites, suggesting greater sampling size may be needed in future research to better capture the spatial variability. Thinning reduces stand density and thereby reduces fuel load and enhances understorey species productivity.","PeriodicalId":129797,"journal":{"name":"Journal of Ecosystems and Management","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124350077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Documenting Fire History in a British Columbia Ecological Reserve 记录不列颠哥伦比亚省生态保护区的火灾历史

Journal of Ecosystems and Management Pub Date : 2013-04-09 DOI: 10.22230/jem.2013v14n1a161

D. Gayton

引用次数: 1

Forage Production Potential in a Ponderosa Pine Stand: Effects of Tree Spacing on Understorey Plants after 45 Years 黄松林分牧草生产潜力:45年后树木间距对林下植物的影响

Journal of Ecosystems and Management Pub Date : 2013-02-20 DOI: 10.7939/R3057CV1G

Percy Folkard, L. Fraser, C. Carlyle, R. Tucker

引用次数: 4

Analysis of Ancient Western Redcedar Stands in the Upper Fraser River Watershed and Scenarios for Protection 上弗雷泽河流域古代西部红杉林分析及保护方案

Journal of Ecosystems and Management Pub Date : 2013-01-29 DOI: 10.22230/jem.2012v13n3a206

D. Coxson, T. Goward, D. Connell

{"title":"Analysis of Ancient Western Redcedar Stands in the Upper Fraser River Watershed and Scenarios for Protection","authors":"D. Coxson, T. Goward, D. Connell","doi":"10.22230/jem.2012v13n3a206","DOIUrl":"https://doi.org/10.22230/jem.2012v13n3a206","url":null,"abstract":"Emerging research has highlighted the significance of ancient western redcedar (Thuja plicata) stands within the upper Fraser River watershed as examples of rare forest types within British Columbia’s inland temperate rainforest (ITR). These stands represent a globally significant repository of canopy lichen biodiversity. Ancient redcedar stands were historically found in greatest abundance in wet “toe-slope” topographic positions, where mountain slopes flatten out as they reach the valley bottom. Abundant groundwater runoff and wet soils in these topographic positions provided protection from fires and sustained trees during dry summer periods. However, the placement of road and rail corridors in these same topographic positions has facilitated the logging of many ancient redcedar stands. The result has been the widespread loss of ancient cedars, which today account for only 3.7% of the 130 571 ha ICHvk2 biogeoclimatic zone east of Prince George. Of the remaining ancient cedar stands found in the ICHvk2 less than 2% (approx. 100 ha) are currently protected within BC provincial parks. Here we outline three scenarios that would increase the proportion of this ecosystem within BC parks and would support landscape-level planning objectives for the upper Fraser River watershed. We suggest that the cultural and biological values represented by these proposed areas would meet criteria for nomination as a UNESCO World Heritage or Biosphere Reserve site, ultimately resulting in widespread positive benefits for diversification of the regional economy, by building on a regional tourist attraction that has already developed at the site of the Ancient Forest Trail.","PeriodicalId":129797,"journal":{"name":"Journal of Ecosystems and Management","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129604283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

2010 Silviculture Techniques Information Needs Survey 2010年造林技术信息需求调查

Journal of Ecosystems and Management Pub Date : 2013-01-23 DOI: 10.22230/jem.2012v13n3a104

A. Wiensczyk

{"title":"2010 Silviculture Techniques Information Needs Survey","authors":"A. Wiensczyk","doi":"10.22230/jem.2012v13n3a104","DOIUrl":"https://doi.org/10.22230/jem.2012v13n3a104","url":null,"abstract":"This research report summarizes findings of an electronic survey designed by FORREX to document the information needs of British Columbia natural resource management professionals in the area of silvicultural systems and stand management techniques, including their ability to use this knowledge to manage for different values on the landscape and the reasons why certain sources of information were not used. Conducted from September to October 2010, the survey was emailed to 561 key silviculture practitioners and researchers in British Columbia. A total of 107 recipients (slightly over 20%) responded to the survey.The main knowledge gaps identified by survey respondents were related to growth and yield, economic rates of return, treatment response, and effects of treatments on values such as biodiversity, wildlife habitat, and hydrology. Other information needs identified included potential impacts of climate change on forest health, forest fire frequency and severity; and production of biofuels or carbon sequestration, and trade-offs associated with managing for these new products.These survey results will help extension providers improve future extension programming. They will also prove useful in developing government and academic silviculture research programs and allocating funds for these programs. Survey results related to implementation barriers will also aid government policy-makers.","PeriodicalId":129797,"journal":{"name":"Journal of Ecosystems and Management","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131286338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Okanagan Invitation Drought Tournament, November 2012 奥肯那根邀请赛，2012年11月

Journal of Ecosystems and Management Pub Date : 2013-01-18 DOI: 10.22230/jem.2012v13n3a561

S. Lapp

引用次数: 2

The 9 Habits of Highly Effective Resource Economies: Lessons for Canada 高效资源经济的9个习惯:给加拿大的教训

Journal of Ecosystems and Management Pub Date : 2013-01-18 DOI: 10.22230/jem.2012v13n3a559

D. Gayton

引用次数: 5

Projecting future distributions of ecosystem climate niches in British Columbia 预测未来不列颠哥伦比亚省生态系统气候位的分布

Journal of Ecosystems and Management Pub Date : 2013-01-18 DOI: 10.22230/jem.2012v13n3a551

Tongli Wang

引用次数: 4