Forest Sciences Commons^™

Emulating Succession Of Boreal Mixedwood Forests In Alberta Using Understory Protection Harvesting, Ivan Bjelnanovic, Philip G. Comeau, Sharon Meredith, Brian Roth

Aspen Bibliography

Understory protection harvesting is a form of partial cutting that can be used in aspen (Populus tremuloides Michx.)-dominated stands that have understories of white spruce (Picea glauca (Moench) Voss). This practice involves removing 75% to 85% of the merchantable aspen while minimizing damage to the advance spruce regeneration, in addition to leaving 15% to 25% of the aspen standing to reduce potential windthrow of the spruce understory. In this paper, we summarize results from 18 stands measured 10 to 12 years after understory protection harvest. Diameter growth of spruce increased during the first five years after harvest while …

Centering Community Voices In Mining Governance, Anna Erwin, Zhao Ma, Emma Patricia Salas O’Brien, Jonathan Bauchet, Nelly Ramírez Calderón, Eliseo Zeballos Zeballos, Glenn Roberto Arce Larrea, Ruxandra Popovici, Laura Zanotti, Chelsea A. Silva

Department of Agricultural Economics Faculty Publications

Peru has shifted away from centralized mining management to governance among government, companies, and communities. Various mechanisms facilitate community participation, including the mining canon, dialogues, and corporate social responsibility programs. Even with these laws and mechanisms, mining pollution and conflicts continue. In this study, we ask: how do communities perceive and participate in mining governance? And what are some alternative ways, driven by community priorities, to address governance in mining contexts? We collected 53 semi-structured with agricultural actors in two Peruvian districts with mining activity and analyzed those perspectives through the lens of community-centered governance. Our analyses revealed how centering …

Do 2h And 18o In Leaf Water Reflect Environmental Drivers Differently?, Lucas A. Cernusak, Adrià Barbeta, Rosemary T. Bush, Rebekka Eichstaedt Bögelein, Juan Pedro Ferrio, Lawrence B. Flanagan, Arthur Gessler, Paula Martín-Gómez, Regina T. Hirl, Ansgar Kahmen, Claudia Keitel, Chun-Ta Lai, Niels C. Munksgaard, Daniel B. Nelson, Jérôme Ogée, John S. Roden, Hans Schnyder, Steve L. Voelker, Lixin Wang, Hilary Stuart-Williams, Lisa Wingate, Wusheng Yu, Liangju Zhao, Matthias Cuntz

Michigan Tech Publications, Part 1

We compiled hydrogen and oxygen stable isotope compositions (δ H and δ O) of leaf water from multiple biomes to examine variations with environmental drivers. Leaf water δ H was more closely correlated with δ H of xylem water or atmospheric vapour, whereas leaf water δ O was more closely correlated with air relative humidity. This resulted from the larger proportional range for δ H of meteoric waters relative to the extent of leaf water evaporative enrichment compared with δ O. We next expressed leaf water as isotopic enrichment above xylem water (Δ H and Δ O) to remove the …

Smokejumper Obituary: Walker, Melvin E. (Redding 2001), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Meeting Minutes, March 23rd, 2022, National Smokejumper Association Board Of Directors

National Smokejumper Association Meeting Minutes

Agenda: 1. Call to Order; 2. Agenda and Consent Agenda; 3. Financials and Treasurer’s Report. (HO #3a and 3b); 4. Investment Report. (HO #4a and 4b); 5. TRAMPS (HO #5a and 5b); 6. Life Member Fund Policy Amendment (HO #5); 7. Web site Update; 8. Legacy Fund Update; 9. Reunion; 10. Nominations Committee Policy Motion (HO #8); 11. Election of Board Members (HO #9); 12. Forest Service Museum Proposal Motion (HO #10a and 10b); 13. 1939 Smokejumper Experimental Group Nomination for FS Museum Honor Roll (HO #11); 14. NSA Proposed Position Statement HO #12; 15. Wrap-up; 16. Adjournment;

Smokejumper Obituary: Nelson, David K. "Dave" (Missoula 1957), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Stillman, Albert Theodore “Al” (Mccall 1959), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Smokejumper Obituary: Wiltzen, Harris Anthony (Missoula 1948), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Climate Effects On Black Spruce And Trembling Aspen Productivity In Natural Origin Mixed Stands, Mahadev Sharma

Aspen Bibliography

Forest managers need site productivity estimates for tree species growing in mixed stands. Models developed in the past are generally for pure stands and don’t factor in the effects of climate change on site productivity. Therefore, site index (SI) models were developed for black spruce (Picea mariana Mill. B.S.P.) and trembling aspen (Populus tremuloides Michx.) trees grown in natural origin mixed stands. For this, 186 trees (93 black spruce and trembling aspen each) were sampled from 31 even-aged natural mixed stands (sites) (3 trees/species/site) across Ontario, Canada. Stand height growth models were developed by incorporating climate variables during …

Wind And Fire: Rapid Shifts In Tree Community Composition Following Multiple Disturbances In The Southern Boreal Forest, Elias Anoszko, Lee E. Frelich, Roy L. Rich, Peter B. Reich

Aspen Bibliography

Under a warming climate, the southern boreal forest of North America is expected to see a doubling in fire frequency and potential for increased wind disturbance over the next century. Although boreal forests are often considered fire-adapted, projected increases in disturbance frequency will likely result in novel combinations of disturbances with severities and impacts on community composition outside historic norms. Using a network of repeatedly measured vegetation monitoring plots, we followed changes in tree community composition in areas of the Boundary Waters Canoe Area Wilderness (BWCAW), in Minnesota, USA, experiencing disturbances ranging from severe windstorms or wildfires to areas affected …

Facilitation Differentially Affects Competitive Responses Of Aspen And Subalpine Fir Through Stages Of Stand Development, Rebecca Lee Molinari, Matthew F. Bekker, Benjamin D. St. Clair, Jason Bartholomew, R. Justin Derose, Stanley G. Kitchen, Samuel B. St. Clair

Aspen Bibliography

Spatial interactions between trees influence forest community succession. The objective of this study was to investigate how shifts in forest composition and proximity between tree species affect stand development over time in mixed forest systems. At six locations across the Fishlake National Forest, Utah, USA, in stands where facilitation has been documented previously, tree-ring samples were collected from aspen and subalpine fir trees. Basal area increment was calculated to characterize the effects of the proximity of overstory trees on multidecadal growth responses of aspen and subalpine fir in aspen-dominant and mixed aspen–conifer stands. Subalpine fir seedlings were established next to …

The Role Of Leaf Decomposition In Macroinvertebrate Colonization, Bethany Mabel Lian Schorr, Kevin Geedey

Independent Research Projects

Decomposition plays an important ecological role in carbon and nutrient cycling that supply food and energy resources to food webs. This study investigates the potential role that leaf decomposition of different leaf species may play in macroinvertebrate assemblages in upper Midwest streams. We hypothesized that the different decomposition rates experienced with different leaf species and in different streams would have an effect on invertebrate colonization due to the variance in nutrient availability. Due to altered fire regimes and other influences, forests are experiencing declines in fire-adapted, heliophytic species such as oaks and compositional shifts toward shade-tolerant, mesophytic species such as …

Smokejumper Obituary: Erwin, Roger W. “Wade” (Missoula 1959), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Timber Talk, Vol. 60, No. 1, March 2022

Timber Talk: Nebraska Forest Industry Newsletter

Lumber market reports

Hardwood lumber prices

Log matchmaking program launch, Heather Kingery

Save the date! – “Managing CarbonThrough Healthy Forests in theSouthern Great Plains”

Upcoming NFS cedar managementand utilization workshop series

Timber sales

Trading post

Quantitative Analysis Of Methodological And Environmental Influences On Survival Of Planted Mangroves In Restoration And Afforestation, Daniel Gorman, Mathew A. Vanderklift, Anna Lafratta

Research outputs 2022 to 2026

Mangrove planting has been employed for decades to achieve aims associated with restoration and afforestation. Often, survival of planted mangroves is low. Improving survival might be aided by augmenting the understanding of which planting methods and environmental variables most influence plant survival across a range of contexts. The aim of this study was to provide a global synthesis of the influence of planting methods and background environment on mangrove survival. This was achieved through a global meta-analysis, which compiled published survival rates for the period 1979–2021 and analyzed the influence of decisions about minimum spacing and which life stage to …

Single-Cell Transcriptome And Network Analyses Unveil Key Transcription Factors Regulating Mesophyll Cell Development In Maize, Shentong Tao, Peng Liu, Yining Shi, Yilong Feng, Jingjing Gao, Lifen Chen, Hairong Wei, Et, Al,

Michigan Tech Publications, Part 1

BACKGROUND: Maize mesophyll (M) cells play important roles in various biological processes such as photosynthesis II and secondary metabolism. Functional differentiation occurs during M-cell development, but the underlying mechanisms for regulating M-cell development are largely unknown. RESULTS: We conducted single-cell RNA sequencing (scRNA-seq) to profile transcripts in maize leaves. We then identified coregulated modules by analyzing the resulting pseudo-time-series data through gene regulatory network analyses. , , , and () families were highly expressed in the early stage, whereas () and families were highly expressed in the late stage of M-cell development. Construction of regulatory networks revealed that these transcript …

Smokejumper Obituary: Palmer, Christopher Richard “Chris” (Redding 1975), National Smokejumper Association

Smokejumper Obituaries

No abstract provided.

Mark-Recapture Study And Habitat Assessment For The Northern Metalmark Butterfly, Calephelis Borealis (Lepidoptera: Riodinidae), Weston J. Henry, Kristian S. Omland, Henry Frye, Wagner L. David

EEB Articles

Background: The northern metalmark (Calephelis borealis), is an exceedingly local, globally rare butterfly that is declining across the Midwestern and Northeastern USA. The principal stressors driving colony losses include afforestation and invasive plants that crowd out its larval hostplant (Packera ovata) and nectar resources.

Aims/Methods: To better understand its declines and guide restoration efforts, we 1) performed a mark-recapture study in Connecticut to document population trends where we were actively managing vegetation; 2) conducted a range-wide survey for evidence of phylogeographic structure, using cytochrome oxidase (CO1); 3) investigated abundance determinants of its larval foodplant, Packera ovata …

The Study Of Tree Biomass Calculation By Comparing Partial Harvest Method With The Allometric Equations Method, Kanlayarat Jantawong, Titinan Pothong

Journal of Bioresource Management

This study aimed to investigate the effective of partial harvest method used for tree biomass estimation. Such method was analyzed for the correlation in compare with invented allometric equations. The advantages and disadvantages of those methods were discussed. The significantly difference between estimation methods were analyzed. As a result, tree biomass calculated by the Brown’s allometric equation produced highest results, followed by the partial harvest method, Tsutsumi’s, Chave’s and Pothong’s equations respectively. The selected allometric equations showed the positive correlation with partial harvest method. The highest positive correlation was found between the partial harvest method and both equation of Chave …

Disturbance Reduces Fungal White-Rot Litter Mat Cover In A Wet Subtropical Forest, D. Jean Lodge, Ashley E. Van Beusekom, Grizelle González, Mareli Sánchez-Julia, Sarah Stankavich

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Fungi that bind leaf litter into mats and produce white-rot via degradation of lignin and other aromatic compounds influence forest nutrient cycling and soil fertility. Extent of white-rot litter mats formed by basidiomycete fungi in Puerto Rico decreased in response to disturbances—a simulated hurricane treatment executed by canopy trimming and debris addition in 2014, a drought in 2015, a treefall, and two hurricanes 10 days apart in September 2017. Percent fungal litter mat cover ranged from 0.4% after Hurricanes Irma and Maria to a high of 53% in forest with undisturbed canopy prior to the 2017 hurricanes, with means mostly …