Northern Journal of Applied Forestry最新文献_第7页

Deep Planting Has No Short- or Long-Term Effect on the Survival and Growth of White Spruce, Black Spruce, and Jack Pine 深植对白云杉、黑云杉和杰克松的生存和生长没有短期或长期的影响

Northern Journal of Applied Forestry Pub Date : 2011-09-01 DOI: 10.1093/NJAF/28.3.146

A. Paquette, J. Girard, Denis Walsh

引用次数: 19

Height-Diameter Equations for Select New Hampshire Tree Species 选择新罕布什尔州树种的高径方程

Northern Journal of Applied Forestry Pub Date : 2011-09-01 DOI: 10.1093/NJAF/28.3.157

Andrew J. Fast, M. Ducey

引用次数: 9

Rating Introgression between Lodgepole and Jack Pine at the Individual Tree Level Using Morphological Traits 在单株水平上利用形态性状评价黑松与杰克松的渐渗

Northern Journal of Applied Forestry Pub Date : 2011-09-01 DOI: 10.1093/NJAF/28.3.138

K. Bleiker, A. Carroll

{"title":"Rating Introgression between Lodgepole and Jack Pine at the Individual Tree Level Using Morphological Traits","authors":"K. Bleiker, A. Carroll","doi":"10.1093/NJAF/28.3.138","DOIUrl":"https://doi.org/10.1093/NJAF/28.3.138","url":null,"abstract":"Introgressive hybridization between species generates novel gene combinations and phenotypes. We required an accessible, objective method of rating introgression between lodgepole pine (Pinus contorta var. latifolia [Engelm.] Critchfield) and jack pine (Pinus banksiana Lamb.) for individual trees where their ranges overlap in Canada for use in another study on host species effects on resistance to an eruptive herbivore that has recently expanded its range. We adapted, simplified, and fully quantified a morphological index developed to rate introgression of pine populations and applied it to individual trees. In addition to principal component analysis (PCA), we also used discriminant function analysis (DFA), a potentially more powerful method given a priori knowledge of parent taxa, to generate introgression ratings. Among-tree variation in morphological traits and introgression was high at sites within the hybrid zone but very low at pure parent sites. PCA and DFA produced similar introgression ratings at the stand level, but ratings differed substantially for some individual trees. Certain morphological traits may be omitted from both PCA and DFA with little impact on stand-level ratings. The discriminant functions presented here are based on easy-to-measure, fully quantifiable morphological traits and can be used by other researchers to produce relative introgression ratings for lodgepole and jack pine. The approach may also be applied to other plant hybrid systems.","PeriodicalId":19281,"journal":{"name":"Northern Journal of Applied Forestry","volume":"28 1","pages":"138-145"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/NJAF/28.3.138","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61394731","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: 9

Influences of Conventional and Low-Density Thinning on the Lower Bole Taper and Volume Growth of Eastern White Pine 常规间伐和低密度间伐对东部白松下孔锥度和体积生长的影响

Northern Journal of Applied Forestry Pub Date : 2011-09-01 DOI: 10.1093/njaf/28.3.123

Christopher H. Guiterman, A. Weiskittel, R. Seymour

引用次数: 6

Effects of Basal Area Factor and Plot Size on Precision and Accuracy of Forest Inventory Estimates 基底面积因子和样地大小对森林清查估算精度和准确度的影响

Northern Journal of Applied Forestry Pub Date : 2011-09-01 DOI: 10.1093/NJAF/28.3.152

P. Becker, Tom Nichols

{"title":"Effects of Basal Area Factor and Plot Size on Precision and Accuracy of Forest Inventory Estimates","authors":"P. Becker, Tom Nichols","doi":"10.1093/NJAF/28.3.152","DOIUrl":"https://doi.org/10.1093/NJAF/28.3.152","url":null,"abstract":"We tested the effects of plot size (0.05-0.30 ac) and basal area factor (BAF) (5-30) on the accuracy and precision of per-acre estimates of tree number, basal area, biomass (all for trees ≥4.5 in. dbh), and sawtimber volume (for trees ≥11.6 in. dbh). Field sampling errors, such as missing in-trees, did not affect our tests. Virtual, variableand fixed-radius plots were randomly located within an artificial matrix of 130 real plots in well stocked, upland hardwood forests of sawtimber-sized trees in the Missouri Ozarks. Inventory parameters were essentially independent of plot size and BAF, while their coefficients of variation decreased with plot size and increased with BAF. Thus, our results for random plots agreed with sampling theory, unlike a previous study using concentric virtual plots in West Virginia forests. A very concentrated zone of high tree density around some plot centers apparently caused the biased estimates by concentric plots. Compared with the entire composite forest, inventory means were accurately estimated (to within 5%) and size class distributions were well represented for plots ≥0.1 ac or ≤ 15 BAF. Our procedures provide a basis for selecting an efficient and cost-effective sampling design suited to forest characteristics and the inventory’s purpose.","PeriodicalId":19281,"journal":{"name":"Northern Journal of Applied Forestry","volume":"28 1","pages":"152-156"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/NJAF/28.3.152","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61394768","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: 6

A Carbon Management Diagram for Oak-hickory Forests in Southern Ohio 俄亥俄州南部橡树-山核桃林的碳管理图

Northern Journal of Applied Forestry Pub Date : 2011-09-01 DOI: 10.1093/NJAF/28.3.161

Roger A. Williams, Yuhua Tao

引用次数: 2

Effects of Cutting Time, Stump Height, and Herbicide Application on Ash (Fraxinus Spp.) Stump Sprouting and Colonization by Emerald Ash Borer (Agrilus planipennis) 刈割时间、树桩高度和除草剂用量对白蜡树(Fraxinus Spp.)树桩发芽和绿灰螟(Agrilus planipennis)定殖的影响

Northern Journal of Applied Forestry Pub Date : 2011-06-01 DOI: 10.1093/NJAF/28.2.79

T. Petrice, R. Haack

{"title":"Effects of Cutting Time, Stump Height, and Herbicide Application on Ash (Fraxinus Spp.) Stump Sprouting and Colonization by Emerald Ash Borer (Agrilus planipennis)","authors":"T. Petrice, R. Haack","doi":"10.1093/NJAF/28.2.79","DOIUrl":"https://doi.org/10.1093/NJAF/28.2.79","url":null,"abstract":"Efforts to eradicate or slow the spread of emerald ash borer (EAB) (Agrilus planipennis Fairmaire [Coleoptera: Buprestidae]) include cutting infested and nearby uninfested ash (Fraxinus spp.) trees. However, ash trees readily sprout after they have been cut, providing potential host material for EAB. In 2004-2005, we conducted studies to determine how different cutting times (midspring, late spring, and late summer), different cutting heights (0-5, 10-15, and 20-25 cm above the ground), and triclopyr (44% active ingredient) stump treatment of green ash (Fraxinus pennsylvanica Marsh.) trees affected subsequent stump sprouting and colonization by EAB. We also cut white ash (Fraxinus americana L.) and black ash (Fraxinus nigra Marsh.) trees 20-25 cm above the ground in late spring. Some stumps of each ash species tested sprouted and were colonized by EAB. All green ash stumps treated with triclopyr died and were not colonized by EAB. Stump sprouting was significantly lower for stumps cut in late spring compared with stumps cut in midspring or late summer. Stump sprouting did not vary significantly among cutting heights. None of the green ash stumps cut in midspring or cut 0-5 cm above the ground were colonized by EAB; however, the frequency of stump colonization by EAB did not vary significantly among cutting times or cutting heights.","PeriodicalId":19281,"journal":{"name":"Northern Journal of Applied Forestry","volume":"28 1","pages":"79-83"},"PeriodicalIF":0.0,"publicationDate":"2011-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/NJAF/28.2.79","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61393884","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: 10

Eastern hemlock decline in riparian areas from Maine to Alabama 东部铁杉在从缅因州到阿拉巴马州的河岸地区减少

Northern Journal of Applied Forestry Pub Date : 2011-06-01 DOI: 10.1093/NJAF/28.2.97

Daniel Evans, M. Aust, C. A. Dolloff, Ben S. Templeton, J. Peterson

{"title":"Eastern hemlock decline in riparian areas from Maine to Alabama","authors":"Daniel Evans, M. Aust, C. A. Dolloff, Ben S. Templeton, J. Peterson","doi":"10.1093/NJAF/28.2.97","DOIUrl":"https://doi.org/10.1093/NJAF/28.2.97","url":null,"abstract":"Eastern hemlock (Tsuga canadensis) in the Appalachian mountain range is threatened by the introduced hemlock woolly adelgid (Adelges tsugae). Potential impacts on riparian systems are great because of eastern hemlock’s role as a foundation species that influences site soil, vegetation, and stream characteristics. We installed permanent research sites at 49 locations in riparian areas, from Maine to Alabama, to survey eastern hemlock health, measure stand dynamics, and predict near-term forest composition without eastern hemlock. This report summarizes the initial stand measurements from summer of 2008. We found hemlock woolly adelgid present at 25 of 49 stands from Massachusetts to Georgia, and all of these stands had some degree of hemlock decline. New England states, Ohio, western Pennsylvania, Kentucky, and Alabama had good hemlock health and no sign of hemlock woolly adelgid. Eighteen of the 49 sites had no nonhemlock conifer species in the overstory, and 30 of 49 sites had less than 5 m 2 ha 1 of nonhemlock conifers. Without eastern hemlock, 25 of the stands would have more than 90% hardwood in the overstory, many of which are in the mid-Atlantic and southern states at sites dominated by shrubs in the understory such as Rhododendron maximum. Competition from shrubs may hinder stand regeneration after disturbance by hemlock woolly adelgid. On the basis of the abundance of hardwood species and lack of conifer species present in the overstory at many infested hemlock-dominated stands, these sites may conver tt o hardwood-dominated stands, which will affect terrestrial and aquatic ecosystem dynamics.","PeriodicalId":19281,"journal":{"name":"Northern Journal of Applied Forestry","volume":"28 1","pages":"97-104"},"PeriodicalIF":0.0,"publicationDate":"2011-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/NJAF/28.2.97","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"61394060","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: 19

Vertical Point Sampling with a Camera 垂直点采样与相机

Northern Journal of Applied Forestry Pub Date : 2011-06-01 DOI: 10.1093/NJAF/28.2.61

M. Ducey, J. Kershaw

引用次数: 6

Logging Residue Volumes and Characteristics following Integrated Roundwood and Energy-Wood Whole-Tree Harvesting in Central Maine 缅因州中部综合圆木和能量木全树采伐后的伐木残渣量和特征

Northern Journal of Applied Forestry Pub Date : 2011-06-01 DOI: 10.1093/NJAF/28.2.66

Julia I. Briedis, Jeremy S. Wilson, J. Benjamin, R. Wagner

引用次数: 12