TITLE

Genetic diversity impacts of forest fires, forest harvesting, and alternative reforestation practices in black spruce (Picea mariana)

AUTHOR(S)
Rajora, O. P.; Pluhar, S. A.
PUB. DATE
May 2003
SOURCE
Theoretical & Applied Genetics;May2003, Vol. 106 Issue 7, p1203
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Benchmarks were established for genetic diversity inherent in natural mature populations, and genetic diversity impacts of forest fires, clearcut harvesting and alternative natural and artificial silvicultural regeneration practices were determined in black spruce (Picea mariana). Allozymes of 32 loci were used to determine and compare genetic diversity and genetic relationships of adjacent or nearby four stand types: post-fire natural mature (FNM), post-fire natural young (FNR), post-harvest natural young (HNR) and post-harvest plantation (PLT), of black spruce at each of the four study sites located in two ecoregions in Manitoba: Ecoregion 90-Lac Seul Upland (Eastern) and Ecoregion 158 - Mid-Boreal Lowland (Northern). Both allelic- and genotypic-based genetic diversity parameters, as well as latent genetic potential, were determined. Black spruce populations showed typical moderate to high levels of allozyme genetic diversity. The mean genetic diversity parameters over the 16 black spruce populations sampled were as follows: percent loci polymorphic – 67%, mean number of alleles per locus – 2.52, effective number of alleles per locus – 1.70, observed heterozygosity – 0.222, expected heterozygosity – 0.308, mean number of observed genotypes per locus – 3.65, mean number of expected genotypes per locus – 5.03, genotype additivity (observed) – 116.8, genotype additivity (expected) – 161, genotype multiplicity (observed) – 6.16 × 1015, genotype multiplicity (expected) – 2.06 × 1019 and latent genetic potential – 26.12. The four stand types (FNM, FNR, HNR and PLT) had comparable and statistically similar genetic diversity levels at each of the four study sites as well as overall. No significant differences in black spruce genetic diversity levels were observed between the two ecoregions in Manitoba, as well as between the post-fire and post-harvest regenerated stands. No particular order of genetic relatedness among the four stand types was observed. Black spruce populations showed some sort of site-related differentiation in their genetic constitution. Allelic heterogeneity and genetic distances among populations within stand types and among four stand types suggest that the genetic diversity was maintained at the landscape level in black spruce. The results of our study demonstrate that forest fires and currently used clearcut harvesting, and alternative natural and artificial silvicultural regeneration practices, do not adversely affect genetic diversity in black spruce, and that the genetic diversity effects of clearcut harvesting are not significantly different from those due to forest fires in black spruce.
ACCESSION #
16708081

 

Related Articles

  • Fifteen-year results of black spruce uneven-aged silviculture in Ontario, Canada. Groot, Arthur // Forestry: An International Journal of Forest Research;Jan2014, Vol. 87 Issue 1, p99 

    An uneven-aged silviculture experiment was established in second-growth peatland black spruce (Picea mariana [Mill.] B.S.P.) stands in the boreal forest of northeastern Ontario, Canada in 1994. Three harvest treatments along with an unharvested control were applied in three replications....

  • Effects of fires in ribbon-like pine forests of southern Siberia. Buryak, L. V.; Sukhinin, A. I.; Kalenskaya, O. P.; Ponomarev, E. I. // Contemporary Problems of Ecology;Jun2011, Vol. 4 Issue 3, p248 

    For the Tsasuchei, Balgazyn, Minusinsk, and Shushensk ribbon-like pine forests of southern Siberia, conditions of ignition and development of fires are analyzed and the flammability is evaluated. Fire effects on vegetation, including forest stand condition and reforestation, are evaluated. It is...

  • Reforestation after the Fountain Fire in Northern California: An Untold Success Story. Jianwei Zhang; Webster, Jeff; Powers, Robert F.; Mills, John // Journal of Forestry;Dec2008, Vol. 106 Issue 8, p425 

    Forest fires have been burning "hot" across the United States and particularly in the West in recent years. So, too, will the debate on postfire management strategies. In this article, we present a successful reforestation project after a catastrophic fire in 1992. Sixteen years later, most...

  • Comparison of growth and physiology of layers and naturally established seedlings of black spruce in a boreal cutover in Quebec Margolis, Hank A.; Doucet, Rene; Paquin, Raynald; Coyea, Marie R. // Canadian Journal of Forest Research;Jan1999, Vol. 29 Issue 1, p1 

    Abstract unavailable

  • Propagating framework trees to restore seasonally dry tropical forest in northern Thailand. Elliott, Stephen; Kuarak, Cherdsak; Navakitbumrung, Puttipong; Zangkum, Sudarat; Anusarnsunthorn, Vilaiwan; Blakesley, David // New Forests;Jan2002, Vol. 23 Issue 1, p63 

    Studies the propagation of framework trees to restore seasonally dry tropical forests in northern Thailand. Key issues of interest; Analysis of pertinent topics and related issues; Implications on forest conservation.

  • Brazilians launch plan to bring back the trees. Homewood, Brian // New Scientist;9/8/90, Vol. 127 Issue 1733, p32 

    Reports that a group of scientists and industrialists in Brazil has drafted a plan called Floram to reforest large areas of the country. Claim that the trees could help offset the greenhouse effect; Project organizers' hope that state governments will take up the project in their areas, backed...

  • Technical and Technological Aspects of Progressive Cutting Forest Compartment with Combined Reforestation. Konstantin Pavlovich, Rukomojnikov // World Applied Sciences Journal;2013, Vol. 24 Issue 11, p1429 

    In this article the new technical and technological variants of performance of a complex of harvesting and reforestation works in a forest are offered, the results of experimental supervision are submitted. The technological roadpattern of development of forest compartment with transplanting of...

  • Forest Protection and Reforestation in Costa Rica: Evaluation of a Clean Development Mechanism Prototype. Subak, Susan // Environmental Management;Sep2000, Vol. 26 Issue 3, p283 

    ABSTRACT / Costa Rica has recently established a program that provides funds for reforestation and forest protection on private lands, partly through the sale of carbon certificates to industrialized countries. Countries purchasing these carbon offsets hope one day to receive credit against...

  • Rainfall Response of Degraded Soil Following Reforestation in the Copper Basin, Tennessee, USA. Harden, Carol P.; Mathews, Louise // Environmental Management;Aug2000, Vol. 26 Issue 2, p163 

    ABSTRACT / After a century of degradation due to mining, logging, acidification, and grazing, the 130-km2 Copper Basin in southeastern Tennessee became the site of increasingly extensive and successful reforestation efforts. To determine the effectiveness of more than 50 years of reforestation...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics