Stand age structural dynamics of North American boreal forests and implications for forest management

2006 ◽  
Vol 8 (4) ◽  
pp. 395-405 ◽  
Author(s):  
J. M Fricker ◽  
Han Y. H Chen ◽  
Jian R Wang
Keyword(s):  
Forest Management ◽  
Structural Dynamics ◽  
North American ◽  
Boreal Forests ◽  
Stand Age

Saproxylic insect assemblages in Canadian forests: diversity, ecology, and conservation

2008 ◽  
Vol 140 (4) ◽  
pp. 453-474 ◽  
Author(s):  
David W. Langor ◽  
H.E. James Hammond ◽  
John R. Spence ◽  
Joshua Jacobs ◽  
Tyler P. Cobb
Keyword(s):  
Forest Management ◽  
Boreal Forests ◽  
Dead Wood ◽  
Sustainable Forest Management ◽  
Forest Harvesting ◽  
Stand Age ◽  
Managed Forests ◽  
Saproxylic Insects ◽  
Associated Species ◽  
Experimental Burns

AbstractSaproxylic insect assemblages inhabiting dead wood in Canadian forests are highly diverse and variable but quite poorly understood. Adequate assessment of these assemblages poses significant challenges with respect to sampling, taxonomy, and analysis. Their assessment is nonetheless critical to attaining the broad goals of sustainable forest management because such species are disproportionately threatened elsewhere by the reductions in dead wood generally associated with commercial exploitation of northern forests. The composition of the saproxylic fauna is influenced by many factors, including tree species, degree of decay, stand age, and cause of tree death. Wildfire and forest harvesting have differential impacts on saproxylic insect assemblages and on their recovery in postdisturbance stands. Exploration of saproxylic insect responses to variable retention harvesting and experimental burns is contributing to the development of prescriptions for conserving saproxylic insects in boreal forests. Understanding of processes that determine diversity patterns and responses of saproxylic insects would benefit from increased attention to natural history. Such work should aim to provide a habitat-classification system for dead wood to better identify habitats (and associated species) at risk as a result of forest management. This tool could also be used to improve strategies to better maintain saproxylic organisms and their central nutrient-cycling functions in managed forests.

Stand Structural Dynamics of North American Boreal Forests

2006 ◽  
Vol 25 (2) ◽  
pp. 115-137 ◽  
Author(s):  
Brian W. Brassard ◽  
Han Y. H. Chen
Keyword(s):  
Structural Dynamics ◽  
North American ◽  
Boreal Forests

Influence of Stand Age And Structure on the Epiphytic Lichen Vegetation in the Middle-Boreal Forests of Finland

1992 ◽  
Vol 24 (2) ◽  
pp. 165-180
Author(s):  
M. Hyvärinen ◽  
P. Halonen ◽  
M. Kauppi
Keyword(s):  
Boreal Forests ◽  
Environmental Variables ◽  
Competitive Ability ◽  
Lichen Species ◽  
Tree Canopy ◽  
Stand Age ◽  
Ecological Strategy ◽  
Epiphytic Lichen ◽  
Vertical Location ◽  
Community Variation

Abstract The epiphytic lichen vegetation on the trunks of Pinus sylvestris and Picea abies was studied and analysed by canonical correspondence analysis in relation to a number of environmental variables. The distribution and abundance of epiphytic lichen species proved to be dependent on the age of the stand, showing divergent responses in relation to phorophyte species and environmental variables such as acidity of the bark and vertical location on the trunk. The importance of stand age in the pattern of community variation is concluded to be an outcome of interaction between changes in the structure of the tree canopy, microclimate and properties of the bark. The responses of single lichen species to changes in the environment seem to vary considerably, indicating differences in competitive ability and ecological strategy between the species.

scholarly journals Framing Forest Carbon for Policy in Temperate North America: Baby Steps toward National Carbon Goals

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1033
Author(s):  
Lloyd C. Irland ◽  
John Hagan
Keyword(s):  
Forest Management ◽  
North America ◽  
North American ◽  
American Options ◽  
Forest Carbon ◽  
Special Issue

Why have a special issue on North American options for reducing national CO2 footprints through forest management [...]

scholarly journals Estimation of Fungal Diversity and Identification of Major Abiotic Drivers Influencing Fungal Richness and Communities in Northern Temperate and Boreal Quebec Forests

Forests ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 1096 ◽  
Author(s):  
Laperriere Genevieve ◽  
Chagnon Pierre-Luc ◽  
Giguère-Tremblay Roxanne ◽  
Morneault Amélie ◽  
Bisson Danny ◽  
...  
Keyword(s):  
Soil Ph ◽  
Fungal Community ◽  
Boreal Forests ◽  
Fungal Diversity ◽  
Linear Models ◽  
Species Conservation ◽  
Environmental Filtering ◽  
Operational Taxonomic Unit ◽  
Stand Age ◽  
High Turnover

Fungi play important roles in forest ecosystems and understanding fungal diversity is crucial to address essential questions about species conservation and ecosystems management. Changes in fungal diversity can have severe impacts on ecosystem functionality. Unfortunately, little is known about fungal diversity in northern temperate and boreal forests, and we have yet to understand how abiotic variables shape fungal richness and composition. Our objectives were to make an overview of the fungal richness and the community composition in the region and identify their major abiotic drivers. We sampled 262 stands across the northern temperate and boreal Quebec forest located in the region of Abitibi-Témiscamingue, Mauricie, and Haute-Mauricie. At each site, we characterized fungal composition using Illumina sequencing, as well as several potential abiotic drivers (e.g., humus thickness, soil pH, vegetation cover, etc.). We tested effects of abiotic drivers on species richness using generalized linear models, while difference in fungal composition between stands was analyzed with permutational multivariate analysis of variance and beta-diversity partitioning analyses. Fungi from the order Agaricales, Helotiales, and Russulales were the most frequent and sites from the north of Abitibi-Témiscamingue showed the highest OTUs (Operational Taxonomic Unit) richness. Stand age and moss cover were the best predictors of fungal richness. On the other hand, the strongest drivers of fungal community structure were soil pH, average cumulative precipitation, and stand age, although much of community variance was left unexplained in our models. Overall, our regional metacommunity was characterized by high turnover rate, even when rare OTUs were removed. This may indicate strong environmental filtering by several unmeasured abiotic filters, or stronger than expected dispersal limitations in soil fungal communities. Our results show how difficult it can be to predict fungal community assembly even with high replication and efforts to include several biologically relevant explanatory variables.

Climate Change and Forest Fire Activity in North American Boreal Forests

2000 ◽  
pp. 368-376 ◽  
Author(s):  
Brian J. Stocks ◽  
Michael A. Fosberg ◽  
Michael B. Wotton ◽  
Timothy J. Lynham ◽  
Kevin C. Ryan
Keyword(s):  
Climate Change ◽  
Forest Fire ◽  
North American ◽  
Boreal Forests ◽  
Fire Activity

The effect of stand age on CO2 efflux from wood ant (Formica rufa group) mounds in boreal forests

2012 ◽  
Vol 52 ◽  
pp. 21-28 ◽  
Author(s):  
Mizue Ohashi ◽  
Timo Domisch ◽  
Leena Finér ◽  
Martin F. Jurgensen ◽  
Liselotte Sundström ◽  
...  
Keyword(s):  
Boreal Forests ◽  
Stand Age ◽  
Co2 Efflux ◽  
Formica Rufa ◽  
Formica Rufa Group

scholarly journals Species Mixing Regulation with Respect to Forest Ecosystem Service Provision

Forests ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 632 ◽  
Author(s):  
Fabian Schwaiger ◽  
Werner Poschenrieder ◽  
Peter Biber ◽  
Hans Pretzsch
Keyword(s):  
Forest Management ◽  
Groundwater Recharge ◽  
Ecosystem Service ◽  
Service Provision ◽  
Quantitative Methods ◽  
Basal Area ◽  
Stand Density ◽  
European Beech ◽  
Stand Age ◽  
Mixed Stands

The control and maintenance of species composition of mixed stands is a highly relevant objective of forest management in order to provide multifunctionality and climatic resilience. In contrast to this requirement there is, however, an evident lack of quantitative methods for mixture regulation. In this context, we propose an approach for the regulation of mixture proportions that has been implemented in a forest management model. The approach considers species-specific growth characteristics and takes into account the mixing effect on stand density. We present five exemplary simulations that apply the regulation. Each simulation maintains one of five desired species compositions. In these simulations, we consider the species European beech and Norway spruce under good site conditions, thus representing the most prominent mixed stands in Central Europe. Based on this model experiment, we analyze the potential benefit of controlled mixing regulation for achieving desired levels and combinations of ecosystem service provision, in particular productivity, diversity, and groundwater recharge. We found that a constant 50% basal area share of beech (equivalent growing space share of 80% to 70% depending on stand age) provided the most balanced supply of ecosystem services. Prominently, groundwater recharge considerably decreased when beech basal area shares were held below 50%. We discuss the ecological and practical implications of the regulation approach and different mixing shares.

Influence of Site and Stand Factors on the Distribution of Crustose Lichens Of The Caliciales in a Suboceanic Spruce Forest Area in Central Norway

1996 ◽  
Vol 28 (4) ◽  
pp. 315-330 ◽  
Author(s):  
Håkon Holien
Keyword(s):  
Species Diversity ◽  
Boreal Forests ◽  
Detrended Correspondence Analysis ◽  
Stand Age ◽  
Spruce Forest ◽  
Humid Climate ◽  
Forest Patches ◽  
Young Forests ◽  
Old Trees ◽  
Crustose Lichens

AbstractThe distribution of crustose Caliciales has been surveyed in 100 spruce forest patches in Sør-Trøndelag, central Norway. Relationships between occurrence of the species and a number of site and stand variables were analysed by detrended correspondence analysis (DCA) and direct gradient analysis. Species diversity7 was significantly higher in old forests and in forests at higher altitudes compared to young forests and forests at lower altitudes. Old trees and snags are considered to be the most important structural components in old forests promoting species diversity of the Caliciales. Threatened or vulnerable species, such as Chaenotheca gracilliina, Cybebe gracilenta, Sclerophora coniophaea and S. peronella were confined to forest on rich soils showing no correlation with forest stand age. Chaenotheca brachypoda and C. trichialis were found to be the most typical old forest species among the Caliciales. Humidiphilous species are considered to be less affected by forestry in a humid climate. A change in forestry practice towards methods imitating the natural dynamic processes is considered necessary to maintain species diversity of the Caliciales in boreal forests.

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