Article
Forestry
Thomas W. Patterson, Cathryn H. Greenberg, Andrew Hacket-Pain
Summary: Oak trees are dominant and important in the Central Hardwood Region of the USA for their timber value and the food value of their acorns for wildlife. This study examined the relationship between acorn production, climate, and tree-ring data from five oak species in southern Appalachian hardwood forests. The results showed limited evidence that acorn production influences tree-ring data, indicating that tree-ring based reconstruction of acorn crops in these oak species may not be feasible.
FOREST ECOLOGY AND MANAGEMENT
(2023)
Article
Forestry
Sarah J. Smith, Brian C. McCarthy, Todd F. Hutchinson, Rebecca S. Snell
Summary: Masting is a reproductive strategy in which individuals synchronize intermittent seed production. This study examined the individual differences in reproductive effort and variability among chestnut oak and black oak. The results showed that diameter at breast height (DBH) was the most consistent variable for explaining intraspecific variation in reproduction. Other influential factors included elevation, clay content, and slope. Thinning treatment did not have a significant effect on acorn production.
FOREST ECOLOGY AND MANAGEMENT
(2022)
Article
Forestry
Liliana Belokopytova, Dina F. Zhirnova, Konstantin Krutovsky, Nariman B. Mapitov, Eugene A. Vaganov, Elena A. Babushkina
Summary: Climate change can decrease forest productivity and stability in semiarid regions. Tree-ring width analysis allows estimation of tree sensitivity to droughts and finding adaptive potential of individual trees and forest populations.
Article
Agronomy
Fanxiang Meng, Ye Yuan, Stephan Jung, Bernd Stimm, Nicole Estrella, Annette Menzel
Summary: This study analyzed the flowering mechanisms and strategies of eight common tree species in Germany using long-term data and statistical models. It found increasing flowering intensities over time and higher synchrony among broadleaf species. Temperature and short-term drought were found to have influences on flowering intensity.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Forestry
Francesco Chianucci, Clara Tattoni, Carlotta Ferrara, Marco Ciolli, Rudy Brogi, Michele Zanni, Marco Apollonio, Andrea Cutini
Summary: Accurate estimates of seed production are crucial for understanding mast seeding mechanisms and designing sustainable management strategies. A new field method for counting seeds in beech forests was proposed and tested, providing reliable estimates unaffected by seed predation. Sampling schemes were evaluated to characterize plot-level mean seed production, suggesting that a grid of 25 random measurements can accurately estimate the plot-level values.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Ecology
Sergio Timoteo, Jorg Albrecht, Beatriz Rumeu, Ana C. Norte, Anna Traveset, Carol M. Frost, Elizabete Marchante, Francisco A. Lopez-Nunez, Guadalupe Peralta, Jane Memmott, Jens M. Olesen, Jose M. Costa, Luis P. da Silva, Luisa G. Carvalheiro, Marta Correia, Michael Staab, Nico Bluthgen, Nina Farwig, Sandra Hervias-Parejo, Sergei Mironov, Susana Rodriguez-Echeverria, Ruben Heleno
Summary: Keystone species play a disproportionately important role in ecosystem functioning. This study examines whether their importance extends across different types of interactions and ecological niche dimensions. The results show that keystone species importance is positively associated across multiple niche dimensions and is independent of abundance. This has important implications for ecosystem resilience and conservation.
FUNCTIONAL ECOLOGY
(2023)
Article
Forestry
Chun-Yang Duan, Ming-Yong Li, Li-Dong Fang, Yu Cao, De-Dong Wu, Hui Liu, Qing Ye, Guang-You Hao
Summary: Quantifying inter-specific variations of tree resilience to drought is crucial for understanding forest functionality in water-limited regions. A study in northern China found significant inter-specific variations in radial growth rate, growth response to drought, and physiological characteristics among seven pine species. Species with higher hydraulic conductivity and photosynthetic capacity were more sensitive to drought stress, indicating a trade-off between hydraulic efficiency and safety across species.
Article
Forestry
Brook M. Constantz, Andrew A. Port, Randall S. Senock
Summary: Tree-ring measurements are crucial in many scientific disciplines, but some species like Hawaiian Sandalwood can exhibit complex growth features that make these measurements challenging. A new two-dimensional transect methodology and software called svg-dendro have been developed to analyze difficult cross-sections of Sandalwood stems. This new method has shown improved sensitivity to tree-ring variability and highlighted the challenges of measuring trees with wedging features.
Article
Plant Sciences
Beixi Fan, Bao Yang, Gang Li
Summary: This study used dendrochronological approaches to investigate the response of radial growth of Qinghai spruce to climate factors. The findings suggest that Qinghai spruce in different locations in the Hexi area have different sensitivities to climate change, and drought conditions limit the growth of Qinghai spruce.
FRONTIERS IN PLANT SCIENCE
(2022)
Editorial Material
Genetics & Heredity
Maren Wellenreuther
Summary: A new study reveals the presence of supergene structures in Atlantic cod that maintain favorable trait combinations and contribute to species persistence over millennia. This intrinsic supergene diversity is linked to ecological stasis and has significant implications for ecosystem stability.
TRENDS IN GENETICS
(2022)
Article
Ecology
Nathan W. Siegert, Deborah G. McCullough, Thomas Luther, Les Benedict, Susan Crocker, Kelly Church, John Banks
Summary: Black ash, the preferred host of the emerald ash borer (EAB), is culturally significant to many Native American and First Nations communities in North America. The spread of EAB is causing extensive loss of black ash trees, with an estimated 75% loss in the species' range by 2035. This invasion will have broad impacts on Indigenous peoples who value black ash as a cultural keystone species, thus requiring collaborative efforts to mitigate EAB impacts and protect black ash resources.
FRONTIERS IN ECOLOGY AND THE ENVIRONMENT
(2023)
Article
Ecology
Angela D. Gonzalez, Ian S. Pearse, Miranda D. Redmond
Summary: Trees allocate resources to core functions like growth, defense, and reproduction. However, little is known about the tradeoffs among these functions over time and how climate change will impact them. This study conducted a 21-year survey of ponderosa pine trees in Colorado, USA, and found that growth and defense were lower in high cone production years. Drought conditions amplified the tradeoffs between reproduction and growth, especially in hotter and drier climates. With climate change, stronger interannual tradeoffs could lead to decreased growth and defensive efforts, increasing the risks of tree mortality.
Article
Multidisciplinary Sciences
Chuanjin Fan, Donghui Zhu, Tongtong Zhang, Ruijia Wu
Summary: As species extinction and biodiversity decline, the identification of keystone species becomes crucial. Traditional approaches neglect the equally important indirect effects. Here, we propose an optimized disintegration strategy using tabu search to identify keystone species. Topological simulations and comparisons with traditional methods confirm the effectiveness of the proposed strategy in optimizing food web disintegration and identifying species that cause the most destruction.
Article
Forestry
Zepeng Mei, Keyan Fang, Qichao Yao, Zhou Wang, Maosheng He, Hao Wu, Feifei Zhou, Wanru Tang, Maowei Bai, Zhipeng Dong
Summary: Tree-ring fire scar is a crucial proxy for reconstructing historical wildfires. However, accurately determining the year of fire occurrence has been challenging. In this study, a novel approach using abrupt shifts in tree-ring geometric center is proposed to detect fire occurrence years. The method has been validated and shown to accurately identify the exact year of fire occurrence.
Review
Forestry
Tongwen Zhang, Jinghui Song, Yuting Fan, Yan Liu, Shulong Yu, Dong Guo, Tianhao Hou, Kailong Guo
Summary: This paper compiles and analyzes the literature on vegetation index research based on tree-ring information in the past 20 years. It provides an overview of the relationship between tree-ring parameters and NDVI, as well as NDVI reconstruction. The research shows a strong correlation between tree-ring parameters and NDVI in summer. In addition, combining tree rings with NDVI is useful for assessing forest decline, quantifying the forest response to drought, and monitoring forest productivity. Future research should consider multiple environmental factors and conduct large-scale studies on the climate response of forest tree growth and the reconstruction of historical vegetation index sequences.
Article
Plant Sciences
Thomas W. Patterson, Paul A. Knapp
Article
Ecology
Thomas W. Patterson, Paul A. Knapp
NATURAL AREAS JOURNAL
(2016)
Article
Biodiversity Conservation
Thomas Patterson, R. Stockton Maxwell, Grant L. Harley, Joshua S. Oliver, James H. Speer, Savannah Collins, Madison Downe, Benjamin Gannon, Lan Ma, Chance Raso, Cody Russell, Aaron Teets
NORTHEASTERN NATURALIST
(2016)
Article
Forestry
Tyler J. Mitchell, Thomas W. Patterson, Paul A. Knapp
TREES-STRUCTURE AND FUNCTION
(2019)
Article
Forestry
Thomas W. Patterson, Grant L. Harley, David H. Holt, Raymond T. Doherty, Daniel J. King, Karen J. Heeter, Ashley L. Chasez, Alyssa C. Crowell, Ian M. Stewart
Summary: This study examined tree-ring data from the Walker House in Tupelo, Mississippi, and found that pine material dated back to 1734, representing the oldest dendroarchaeology-confirmed dating match for construction materials in the southeastern US. The research also showed statistically significant results by cross-dating latewood growth for southeastern US pine species.
Article
Ecology
Thomas Patterson
Summary: The study found that the percentage of trees bearing cones can effectively predict longleaf pine cone production. Successful regeneration typically occurs when the percentage of trees bearing cones exceeds 90%. Therefore, using a simple threshold of tree cone percentage as an assessment for longleaf pine cone production is effective.
FRONTIERS IN FORESTS AND GLOBAL CHANGE
(2021)
Article
Forestry
Tyler J. Mitchell, Paul A. Knapp, Thomas W. Patterson
TREES FORESTS AND PEOPLE
(2020)
Article
Geography
Thomas Patterson
SOUTHEASTERN GEOGRAPHER
(2020)
Article
Environmental Sciences
T. J. Mitchell, P. A. Knapp, T. W. Patterson
ENVIRONMENTAL RESEARCH COMMUNICATIONS
(2019)
Review
Geography
Thomas Patterson, Paul Knapp
Article
Geography
Keith Watkins, Thomas Patterson, Paul Knapp
SOUTHEASTERN GEOGRAPHER
(2018)
Article
Geography
Thomas W. Patterson, Lindsay W. Cummings, Paul A. Knapp
PROFESSIONAL GEOGRAPHER
(2016)
Article
Geography
Thomas Patterson
SOUTHEASTERN GEOGRAPHER
(2014)
Article
Forestry
Lu-Ke Zhang, Ke-Cheng Zhu, Hua-Yang Guo, Bao-Suo Liu, Bo Liu, Nan Zhang, Dian-Chang Zhang
Summary: A new cell line derived from the muscle tissue of the golden pompano, called golden pompano muscle (GPM), has been successfully developed and characterized in this study. GPM cells exhibit fibroblast-like morphology and have a high proliferation rate in Leibovitz's L-15 medium supplemented with fetal bovine serum. The GPM cell line has been stable for over 80 generations and can be cryopreserved. It has been confirmed that the GPM cells used in this study are from the golden pompano based on molecular characterization and chromosome analysis. In addition, GPM cells are susceptible to red-spotted grouper nervous necrosis virus (RGNNV) and can be used for gene expression studies and viral pathogenesis research. The interaction between host and virus can also be investigated using this cell line.