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Articles 1 - 30 of 8298

Full-Text Articles in Forest Sciences

Modeling Experiments For Evaluating The Effects Of Trees, Increasing Temperature, And Soil Texture On Carbon Stocks In Agroforestry Systems In Kerala, India, Ann E. Russell, B. Mohan Kumar Sep 2019

Modeling Experiments For Evaluating The Effects Of Trees, Increasing Temperature, And Soil Texture On Carbon Stocks In Agroforestry Systems In Kerala, India, Ann E. Russell, B. Mohan Kumar

Ann E. Russell

Research Highlights: Agroforestry systems in the humid tropics have the potential for high rates of production and large accumulations of carbon in plant biomass and soils and, thus, may play an important role in the global C cycle. Multiple factors can influence C sequestration, making it difficult to discern the effect of a single factor. We used a modeling approach to evaluate the relative effects of individual factors on C stocks in three agricultural systems in Kerala, India. Background and Objectives: Factors such as plant growth form, management, climate warming, and soil texture can drive differences in C storage among ...


Historical Population Increases And Related Inciting Factors Of Agrilus Anxius, Agrilus Bilineatus, And Agrilus Granulatus Liragus (Coleoptera: Buprestidae) In The Lake States (Michigan, Minnesota, And Wisconsin), Robert A. Haack, Toby Petrice Sep 2019

Historical Population Increases And Related Inciting Factors Of Agrilus Anxius, Agrilus Bilineatus, And Agrilus Granulatus Liragus (Coleoptera: Buprestidae) In The Lake States (Michigan, Minnesota, And Wisconsin), Robert A. Haack, Toby Petrice

The Great Lakes Entomologist

Three native species of tree-infesting Agrilus have regularly reached outbreak levels in the Lake States (Michigan, Minnesota, and Wisconsin), including A. anxius Gory (bronze birch borer), A. bilineatus (Weber) (twolined chestnut borer), and A. granulatus liragus Barter & Brown (bronze poplar borer). The main host trees for these Agrilus are species of Betula for A. anxius, Castanea and Quercus for A. bilineatus, and Populus for A. granulatus liragus. Based on 197 annual forest health reports for Michigan (1950–2017, 66 years), Minnesota (1950–2017, 64 years), and Wisconsin (1951–2017, 67 years), A. bilineatus was the most often reported Agrilus species in all three states (mentioned in 90 annual reports), with A. anxius second (71 reports) and A. granulatus liragus third (21 reports). Drought was the most commonly reported inciting factor for outbreaks of all three Agrilus species, with defoliation events ranking second. The top two defoliators reported as inciting outbreaks of each species were, in decreasing order, Fenusa pumila Leach (Hymenoptera: Tenthredinidae; birch leafminer) tied with Malacosoma disstria Hübner (Lepidoptera: Lasiocampidae; forest tent caterpillar) for A. anxius; M. disstria and Alsophila pometaria (Harris) (Lepidoptera: Geometridae; fall cankerworm) for A. bilineatus; and M. disstria and Choristoneura conflictana (Walker) (Lepidoptera: Tortricidae; large aspen tortrix) for A. granulatus liragus. Other environmental factors occasionally listed as inciting Agrilus outbreaks included late spring frosts, ice storms, and strong wind events.


Diversity And Abundance Of Soil Microbes Differ Along A Forest-Pasture Transect, Hannah Suli, Ashley Schumann, Cleo Bickley, Jasmine Rodriguez Sep 2019

Diversity And Abundance Of Soil Microbes Differ Along A Forest-Pasture Transect, Hannah Suli, Ashley Schumann, Cleo Bickley, Jasmine Rodriguez

IdeaFest: Interdisciplinary Journal of Creative Works and Research from Humboldt State University

No abstract provided.


Modeling Experiments For Evaluating The Effects Of Trees, Increasing Temperature, And Soil Texture On Carbon Stocks In Agroforestry Systems In Kerala, India, Ann E. Russell, B. Mohan Kumar Sep 2019

Modeling Experiments For Evaluating The Effects Of Trees, Increasing Temperature, And Soil Texture On Carbon Stocks In Agroforestry Systems In Kerala, India, Ann E. Russell, B. Mohan Kumar

Natural Resource Ecology and Management Conference Papers, Posters and Presentations

Research Highlights: Agroforestry systems in the humid tropics have the potential for high rates of production and large accumulations of carbon in plant biomass and soils and, thus, may play an important role in the global C cycle. Multiple factors can influence C sequestration, making it difficult to discern the effect of a single factor. We used a modeling approach to evaluate the relative effects of individual factors on C stocks in three agricultural systems in Kerala, India. Background and Objectives: Factors such as plant growth form, management, climate warming, and soil texture can drive differences in C storage among ...


Detecting Dynamic System Regime Boundaries With Fisher Information: The Case Of Ecosystems, Eva Konig, Heriberto Cabezas, Audrey L. Mayer Sep 2019

Detecting Dynamic System Regime Boundaries With Fisher Information: The Case Of Ecosystems, Eva Konig, Heriberto Cabezas, Audrey L. Mayer

Michigan Tech Publications

The direct measurement of the resilience (resistance to disturbances) of an ecosystem’s current regime (or “alternative stable state”) remains a key concern for managing human impacts on these ecosystems and their risk of collapse. Approaches which utilize statistics or information theory have demonstrated utility in identifying regime boundaries. Here, we use Fisher information to establish the limits of the resilience of a dynamic regime of a predator–prey system. This is important because previous studies using Fisher information focused on detecting whether a regime change has occurred, whereas here we are interested in determining how much an ecological system ...


Early Warning Of Global Change Effects On Catchment Nutrient Exports, Haibin Dong Aug 2019

Early Warning Of Global Change Effects On Catchment Nutrient Exports, Haibin Dong

Electronic Thesis and Dissertation Repository

Global change scientists seek sentinels of change. On forested landscapes, first-order catchments serve as sentinels of global stressors and their effects on downstream surface waters. Here, I explored global stressors – including climate warming, hydrological intensification, and recovery from atmospheric acidic deposition – and their effects on nutrient exports in 22-year stream chemistry records from 41 forested first-order catchments in a network of North American long-term monitoring sites. First, I used multivariate autoregressive models to establish relationships between changes in global stressors and changes in catchment nutrient exports. Second, I analyzed the residuals of these relationships to determine if there was evidence ...


More Than The Sum Of Its Parts: How Disturbance Interactions Shape Forest Dynamics Under Climate Change, Melissa S. Lucash, Robert M. Scheller, Brian R. Sturtevant, Eric J. Gustafson, Alec M. Kretchun, Jane R. Foster Aug 2019

More Than The Sum Of Its Parts: How Disturbance Interactions Shape Forest Dynamics Under Climate Change, Melissa S. Lucash, Robert M. Scheller, Brian R. Sturtevant, Eric J. Gustafson, Alec M. Kretchun, Jane R. Foster

Melissa S. Lucash

Interactions among disturbances are seldom quantified, and how they will be affected by climate change is even more uncertain. In this study, we sought to better understand how interactions among disturbances shift under climate change by applying a process-based landscape disturbance and succession model (LANDIS-II) to project disturbance regimes under climate change in north-central Minnesota, USA. Specifically, we (1) contrasted mortality rates and the extent of disturbance for four individual (single) disturbance regimes (fire, insects, wind, or forest management) vs. all four disturbance regimes operating simultaneously (concurrent) under multiple climate change scenarios and (2) determined how climate change interacts with ...


Four-Fold Increase In Solar Forcing On Snow In Western U.S. Burned Forests Since 1999, Kelly E. Gleason, Joseph R. Mcconnell, Monica M. Arienzo, Nathan Chellman, Wendy M. Calvin Aug 2019

Four-Fold Increase In Solar Forcing On Snow In Western U.S. Burned Forests Since 1999, Kelly E. Gleason, Joseph R. Mcconnell, Monica M. Arienzo, Nathan Chellman, Wendy M. Calvin

Kelly E. Gleason

Forest fires are increasing across the American West due to climate warming and fire suppression. Accelerated snow melt occurs in burned forests due to increased light transmission through the canopy and decreased snow albedo from deposition of light-absorbing impurities. Using satellite observations, we document up to an annual 9% growth in western forests burned since 1984, and 5 day earlier snow disappearance persisting for >10 years following fire. Here, we show that black carbon and burned woody debris darkens the snowpack and lowers snow albedo for 15 winters following fire, using measurements of snow collected from seven forested sites that ...


Cougar Exploitation Levels In Utah: Implications For Demographic Structure, Metapopulation Dynamics, And Population Recover, David C. Stoner Aug 2019

Cougar Exploitation Levels In Utah: Implications For Demographic Structure, Metapopulation Dynamics, And Population Recover, David C. Stoner

David Stoner

Presently, eleven western states and two Canadian provinces utilize sport hunting as the primary mechanism for managing cougar (Puma concolor) populations. However, the impacts of sustained harvest on population dynamics and demographic structure arc not well understood. Additionally, the lack of cost-effective enumeration techniques and strongly conflicting societal values complicate effective management of this species. Given these concerns, the primary goals of this study were (I) to determine the effects of sustained harvest on cougar populations, and (2) estimate the level and extent of cougar harvest statewide.

I monitored cougar populations on Monroe Mountain in south-central Utah, and in the ...


Seed And Seedling Data From Sugarcreek Metropark Restoration Experiment, Michaela J. Woods, Meredith Cobb, Ryan W. Mcewan Aug 2019

Seed And Seedling Data From Sugarcreek Metropark Restoration Experiment, Michaela J. Woods, Meredith Cobb, Ryan W. Mcewan

Five Rivers MetroParks Collaboration Data Archive

This dataset encompasses information following seed germination and seedling growth of three tree species: Quercus rubra, Juglans cinerea, and Carya laciniosa. Seed sizes were recorded prior to incubation in sand, vermiculite, or without media. Seeds were then germinated with time to germination recorded in this dataset. After germination, seedlings were planted in Sugarcreek Metropark in either fall 2011 or spring 2012. One-half of seedlings were planted in tree tubes and a half without. Seedling height and diameter was recorded in June 2014 and March 2019, and death of seedlings was noted.


Within-Stream Variability Data, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Within-Stream Variability Data, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Wetted Width, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Wetted Width, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Terrestrial Fine Woody Debris, Erin C. Rowekamp, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Terrestrial Fine Woody Debris, Erin C. Rowekamp, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Water Toxicity Effects Test: Physicochemical Data, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Water Toxicity Effects Test: Physicochemical Data, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Time To Colonization Trial Data, M. E. Maloney, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Time To Colonization Trial Data, M. E. Maloney, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Twig And Fruit Litter Basket, Erin C. Rowekamp, Taylor M. Buskey, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Twig And Fruit Litter Basket, Erin C. Rowekamp, Taylor M. Buskey, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Water Toxicity Effects Test: Survival And Growth (Dry Mass), Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Water Toxicity Effects Test: Survival And Growth (Dry Mass), Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Terrestrial Coarse Woody Debris, Erin C. Rowekamp, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Terrestrial Coarse Woody Debris, Erin C. Rowekamp, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Sediment % Solids And Total Organic Carbon, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Sediment % Solids And Total Organic Carbon, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Site Characteristics, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Site Characteristics, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

Stream order, HHEI, Watershed size, Forest Cover, Maximum pool depth


Sediment Toxicity Effects Test, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Sediment Toxicity Effects Test, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Seedling, Erin C. Rowekamp, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Seedling, Erin C. Rowekamp, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Site Population Trial Data, M. E. Maloney, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Site Population Trial Data, M. E. Maloney, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Prototype Data, M. E. Maloney, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Prototype Data, M. E. Maloney, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Sapling, Erin C. Rowekamp, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Sapling, Erin C. Rowekamp, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Probe Data, Charlotte A. Shade, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Probe Data, Charlotte A. Shade, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

Temperature, Dissolved oxygen, Conductivity, pH, Total dissolved solids


Macroinvertebrates, Mitchell J. Kukla, Corey Kuminecz, M. E. Maloney, Joseph Murphy, Taylor M. Buskey, Jenea I. Adams, Michelle N. Little, Eric B. Borth, Taylor M. Sparbanie, Sean D. Mahoney, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Macroinvertebrates, Mitchell J. Kukla, Corey Kuminecz, M. E. Maloney, Joseph Murphy, Taylor M. Buskey, Jenea I. Adams, Michelle N. Little, Eric B. Borth, Taylor M. Sparbanie, Sean D. Mahoney, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Overstory, Erin C. Rowekamp, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Overstory, Erin C. Rowekamp, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Lonicera Maackii Leaf Leachate Toxicity: Survival, Eric B. Borth, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Lonicera Maackii Leaf Leachate Toxicity: Survival, Eric B. Borth, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

Lymnaea stagnalis and Hyalella azteca


Lonicera Maackii Leaf Leachate Toxicity: Physicochemical Data, Eric B. Borth, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan Jul 2019

Lonicera Maackii Leaf Leachate Toxicity: Physicochemical Data, Eric B. Borth, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

Lymnaea stagnalis and Hyalella azteca