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Articles 1 - 19 of 19
Full-Text Articles in Life Sciences
Assessing The Long-Term Effects Of Natural Disturbance-Based Silvicultural On The Avian Assemblage At The Acadian Forest Ecosystem Research Program, Carl Pohlman
Electronic Theses and Dissertations
Active forest management alters the resources available to forest-obligate species. Large-scale intensive management practices where timber production is the primary objective can lead to notable ecological changes in forest ecosystems. A key concept of ecological forestry is to design forest management activities to emulate natural disturbance regimes as a way to maintain the ecological integrity of forests. The Acadian Forest Ecosystem Research Program (AFERP) was undertaken as an experimental demonstration of management reflective of the region’s disturbance regime, which typically produces small canopy gaps. AFERP includes nine research areas assigned to three silvicultural treatments: unharvested control, small gap (expanding-group selection …
Rusty Blackbird Use Of Commercial Spruce-Fir Forests Of Northern New England, Luke M. Douglas
Rusty Blackbird Use Of Commercial Spruce-Fir Forests Of Northern New England, Luke M. Douglas
Electronic Theses and Dissertations
The Rusty Blackbird (Euphagus carolinus) has experienced a steep population decline since the 1970s, with qualitative accounts suggesting that the species’ numbers have been falling prior to the 1950s. The reason for this decline is still not fully understood, though recent work suggests that habitat destruction and disturbance in the breeding and wintering ranges are likely causes. The species is a habitat specialist that relies on spruce-fir stands located near wetlands for breeding in the boreal and Acadian forests of North America. Historically, the natural disturbance regime in the Acadian region included biotic agents such as beaver and …
Forest Policies And Adaptation To Climate Change In Maine: Stakeholder Perceptions And Recommendations, Alyssa R. Soucy, Sandra De Urioste-Stone, Ivan J. Fernandez, Aaron Weiskittel, Parinaz Rahimzadeh-Bajgiran, Tom Doak
Forest Policies And Adaptation To Climate Change In Maine: Stakeholder Perceptions And Recommendations, Alyssa R. Soucy, Sandra De Urioste-Stone, Ivan J. Fernandez, Aaron Weiskittel, Parinaz Rahimzadeh-Bajgiran, Tom Doak
Maine Policy Review
Socioeconomic pressures require forest management to address the impacts of climate change. However, we must ask, Are current forest policies sufficient to deal with the impacts of climate change? Here, we report on two surveys of forest stakeholders in Maine including woodlot owners and forestry professionals and discuss their perceptions of the barriers to climate change adaptation. We conclude with several policy directions including reevaluating existing policies, expanding incentivebased policies, integrating adaptation efforts into mitigation efforts, and increasing communication and outreach.
The Future Of Maine's Forests Under Alternative Socioeconomic, Climate And Conservation Pathways, Jianheng Zhao
The Future Of Maine's Forests Under Alternative Socioeconomic, Climate And Conservation Pathways, Jianheng Zhao
Electronic Theses and Dissertations
Maine is a historically important timber supply region in North America and understanding the potential change in forestlands and their product industries affected by climate change and various socio-economic conditions can better improve the forest healthy and sustain a sustainable product industry. A statistical harvest choice model for the state of Maine was developed in chapter 1. It was estimated using a multinomial logit model of two products, under varying management intensities, and ownership classifications across varying market conditions. Results indicate that stumpage prices have a significant effect on forest landowners' harvest decisions and that the expansion of conservation land …
Spruce Grouse Habitat Ecology In Maine's Commercially Managed Acadian Forest, Stephen W. Dunham
Spruce Grouse Habitat Ecology In Maine's Commercially Managed Acadian Forest, Stephen W. Dunham
Electronic Theses and Dissertations
Spruce grouse (Falcipennis canadensis) inhabiting the mixed coniferous-deciduous forests of the northeastern United States are at the southern extent of their range. These mixed forests are known collectively as the Acadian forest and represent the transitional zone between the boreal forest to the north and the deciduous northern hardwoods forests to the south. Often assumed to be associated with mature, unharvested forest in this region, few studies have assessed habitat relationships of the species within areas dominated by commercial forest management. We investigated the influence of stand maturity, vertical and horizontal cover, and patchiness on the occupancy and …
Evaluation Of Airborne Lidar As A Tool For Obtaining Sustainable Forest Management Of Maine's Forests, Rei Hayashi
Evaluation Of Airborne Lidar As A Tool For Obtaining Sustainable Forest Management Of Maine's Forests, Rei Hayashi
Electronic Theses and Dissertations
The first objective of this study was to evaluate the applicability of using a low density (ca. 1 point m2) discrete-return LiDAR for predicting maximum tree height, stem density, basal area, quadratic mean diameter, and stem volume using an area-based approach. The research was conducted at the Penobscot Experimental Forest in central Maine, where a range of stand structures and species composition is present and generally representative of northern Maines forests. Using a variety of high dimensional LiDAR metrics, a prediction model was developed using random forest, a nonparametric approach, based on reference data collected in fixed radius circular plots. …
Production Ecology And Stand Dynamics Of Young Acadian Forest Stands In Response To Silvicultural Intensity And Compositional Objectives, Andrew S. Nelson
Production Ecology And Stand Dynamics Of Young Acadian Forest Stands In Response To Silvicultural Intensity And Compositional Objectives, Andrew S. Nelson
Electronic Theses and Dissertations
Early successional stands are common across the Acadian forests of eastern Canada and the Northeastern US. However, productivity and dynamics of these stands, as well as the underlying mechanisms influencing these processes, under different management scenarios are poorly understood. To address this need, I used a factorial experiment that controlled silvicultural intensity and species composition to quantify the effects of varying treatments on early stand dynamics, and the physiological and morphological factors influencing tree performance . Specifically, I studied: 1) species differences in aboveground allometrics, 2) light capture, light-use efficiency (LUE; growth/light capture), and foliar carbon isotope composition (δ13C) of …
Mp761: Considerations And Recommendations For Retaining Woody Biomass On Timber Harvest Sites In Maine, Jeffrey G. Benjamin
Mp761: Considerations And Recommendations For Retaining Woody Biomass On Timber Harvest Sites In Maine, Jeffrey G. Benjamin
Miscellaneous Publications
This report and associated guidelines focus on the amount and type of woody biomass that should be retained in the forest after a harvest operation to protect soil productivity, water quality, and site-level biodiversity. Woody biomass, defined from a forest operations perspective, is comprised of logging residues, previously unmerchantable stems, and other such woody material harvested directly from the forest typically for the purposes of energy production. In the broadest sense woody biomass is the total mass of roots, stem, branches, bark and leaves of all tree and shrub species (live and dead) in the forest. Under the broad definition …
Comparing Relative Abundance Of Amphibians In Forest Canopy Gaps Of Natural Origin Vs. Timber Harvest Origin, Carol J. Strojny, Malcolm L. Hunter Jr.
Comparing Relative Abundance Of Amphibians In Forest Canopy Gaps Of Natural Origin Vs. Timber Harvest Origin, Carol J. Strojny, Malcolm L. Hunter Jr.
Publications
Relative abundance of amphibians in forest canopy gaps of natural origin vs. timber harvest origin.— Small–scale canopy gaps created by logging may retain adequate habitat structure to maintain amphibian abundance. We used pitfalls with drift fences to measure relative abundance of amphibians in 44 harvested gaps, 19 natural treefall gaps, and 36 closed–canopy forest plots. Metamorphs had relatively lower capture rates in large harvest gaps for Ambystoma maculatum, Lithobates catesbeianus, L. clamitans, and L. sylvaticus but we did not detect statistically significant (p < 0.1) differences among gap types for Lithobates palustris metamorphs. L. clamitans juveniles and L. sylvaticus juveniles and adults had relatively …
Effects Of Forest Management On Click Beetle (Coleoptera: Elateridae) Assemblages In The Acadian Forest Of Maine, Shelly L. Thomas
Effects Of Forest Management On Click Beetle (Coleoptera: Elateridae) Assemblages In The Acadian Forest Of Maine, Shelly L. Thomas
Electronic Theses and Dissertations
Click beetle (Coleoptera: Elateridae) assemblages were examined in three experiments in the Acadian forest of Maine. First, I used flight intercept traps to compare Elaterid assemblages in stands that developed after clearcut, shelterwood, and selection harvests. Click beetle richness was highest in stands managed under a selection system and lowest in stands regenerated using the clearcut method. The abundance of click beetle species was lower in stands managed by clearcutting than in stands managed using the shelterwood and selection methods. Hardwood basal area was the best environmental predictor for both species richness and species abundance. Second, I examined whether Elaterid …
Dynamics Of Forest Structure Under Different Silvicultural Regimes In The Acadian Forest, Michael R. Saunders
Dynamics Of Forest Structure Under Different Silvicultural Regimes In The Acadian Forest, Michael R. Saunders
Electronic Theses and Dissertations
Research plots in many long-term studies of forest ecosystems often cannot be used for spatial modeling because of their small scale and nested inventory design. This has been unfortunate as these plots represent some of the best records of structural development as affected by forest management. I developed methodologies to reconstruct both tree height growth and spatial pattern in these types of plots from historical inventory records and stem-mapped data, and then retrospectively investigated 3-dimensional structural development as affected by five silvicultural and harvesting treatments (unmanaged natural area, commercial clearcut, fixed-diameter limit, 5-year selection, and 3-stage shelterwood— with and without …
Forestry Cooperatives For Diverse Management Goals: An Assessment Of Interest Levels Among Maine's Nonindustrial Private Forest Owners Enrolled In The Tree Growth Tax Program, Brian Jonathan Schneider
Forestry Cooperatives For Diverse Management Goals: An Assessment Of Interest Levels Among Maine's Nonindustrial Private Forest Owners Enrolled In The Tree Growth Tax Program, Brian Jonathan Schneider
Electronic Theses and Dissertations
Owners of small, non-industrial woodland parcels in the United States maintain heterogeneous management goals for their individual parcels. Research has shown that timber harvesting is becoming less of a priority for this landowner group. In addition, average parcel size for these ownerships has decreased noticeably over the past 20 years. Parcelization, forest fragmentation and the presence of varied landowner goals complicate the matter of conducting ecologically sound, financially feasible forest management. The purpose of this study was to present thee forestry cooperative models to small, non-industrial woodland owners in Maine and to ascertain interest levels. Cooperative models were based on …
Maine Forests: A Century Of Change, 1900-2000…And Elements Of Policy Change For A New Century, Lloyd Irland
Maine Forests: A Century Of Change, 1900-2000…And Elements Of Policy Change For A New Century, Lloyd Irland
Maine Policy Review
At the close of the 19th century, the state’s forest area was at an all time low; land ownership was changing rapidly with the emergence of new paper companies; a growing number of wildlife species were threatened; and widespread unease over the future of Maine’s forests was evident. Today a similar unease is evident. Many believe the state’s spruce-fir forest is being overcut; land ownership is changing rapidly; fear exists that the sustainability of Maine’s forests; and wildlife populations have been severely compromised. Given the similarity in circumstance, one might ask whether there has been any change over the past …
Clearcutting In Maine: Would Somebody Please Ask The Right Question?, John M. Hagan Iii
Clearcutting In Maine: Would Somebody Please Ask The Right Question?, John M. Hagan Iii
Maine Policy Review
In November [1996], Maine citizens will cast their votes for or against the Green Party-initiated referendum on forest practices. Better known as the clearcutting referendum, its supporters and opponents have staked out their terms in what has become a bitter debate over "jobs for Maine people" versus the "future of the Maine North Woods." Yet, amidst the deluge of media campaigns and ideological predictions, rest important questions—about forest management practices and how best to ensure a viable future for the people and forests of Maine. John Hagan contributes a perspective to this debate, blending scientific data with personal experience of …
Forest Policy Is Hard, Lloyd C. Irland
Common Sense Over Politics Is The Answer, Kevin Hancock
Common Sense Over Politics Is The Answer, Kevin Hancock
Maine Policy Review
No abstract provided.
Dynamic Tension: An Analysis Of What Happened With The Forestry Referendum And Where We Go From Here, Mitch Lansky
Dynamic Tension: An Analysis Of What Happened With The Forestry Referendum And Where We Go From Here, Mitch Lansky
Maine Policy Review
No abstract provided.
The Northern Forest Lands Council: Seeking Consensus, Christopher Spruce
The Northern Forest Lands Council: Seeking Consensus, Christopher Spruce
Maine Policy Review
No abstract provided.
B740: Effect Of Soil And Urea Fertilization On Foliar Nutrients And Basal Area Growth Of Red Spruce, L.O. Safford, H.E. Young, T.W. Knight
B740: Effect Of Soil And Urea Fertilization On Foliar Nutrients And Basal Area Growth Of Red Spruce, L.O. Safford, H.E. Young, T.W. Knight
Bulletins
In this experiment we studied the effect of nitrogen fertilizer and soil on the nutrient content of foliage and average basal area growth of red spruce (Picea rubens Sarg.) trees in stands that were approaching economic maturity. These trees were on three common soil series of eastern and central Maine. We conducted foliage analyses for 5 years after fertilization, and measured the basal area growth for 9 years after treatment.