Article
Plant Sciences
Lin-Tao Fu
Summary: Accurate predictions of seed dispersal kernels are crucial for understanding vegetation communities and landscape dynamics. The influence of local wind speed reduction around a single shrub element on seed dispersal was studied, revealing that it increased seed deposition in nearby regions and decreased it farther away. Furthermore, local wind reduction had a greater impact on short-distance dispersal than on long-distance dispersal.
Article
Forestry
Juan Carlos Lopez-Almansa
Summary: This paper investigates the ecological factors affecting seed germination and early seedling establishment in Ulmus minor. The results suggest that factors such as light, water availability, soil cover, and substrate type play significant roles in the sexual regeneration of U. minor.
Article
Plant Sciences
Chang Wang, Zhe Liu, Zicheng Wang, Wenhui Pang, Long Zhang, Zhaozhu Wen, Yiran Zhao, Juan Sun, Zeng-Yu Wang, Chao Yang
Summary: Autotoxicity is a phenomenon in which a plant inhibits the growth of the same species through the release of toxic chemical compounds. This study found that the leguminous plant M. truncatula exhibits autotoxicity and allelopathic effects, providing a new model species for further research on autotoxicity and allelopathy.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Ecology
Matthew A. Kaproth, Maarten B. Eppinga, Jane Molofsky
Summary: Seed dispersal is crucial for plant populations to survive and spread, but stress can affect plant architecture and fecundity, compromising dispersal. Trait variation within species in response to the environment is not well understood, especially regarding the trade-offs between dispersal and competitive ability.
FUNCTIONAL ECOLOGY
(2023)
Article
Forestry
Yonghong Luo, Jinfeng Zhang, Xingfu Yan, Min Zhang, Shuhua Wei, Hui Yang, Yan Shen, Jinbao Zhang, Jiming Cheng
Summary: The establishment of seedlings is crucial for plant regeneration, but vulnerable to various factors. This study examined the effects of different degrees of cotyledon loss on the growth of seedlings germinating from different seed sizes. The results showed that large-seeded seedlings exhibited better growth characteristics compared to small-seeded seedlings, and slight cotyledon excision had no effect on the growth of large-seeded seedlings but significantly reduced the biomass of small-seeded seedlings. These findings suggest that large-seeded seedlings have a stronger adaptation for early seedling recruitment.
Article
Plant Sciences
Andres Barea-Marquez, Francisco J. Ocana-Calahorro, Rodrigo Balaguer-Romano, Jose Maria Gomez, Eugene W. Schupp, Raquel Sanchez-Perez, Jesus Guillamon, Joanna Zhang, Rafael Rubio de Casas
Summary: This paper examines the phenotypic and genotypic differences in fruit and seed traits during the naturalization of almond trees in SE Iberia. The results suggest that strong directional selection plays a role in the feralization process, leading to smaller and more toxic seeds encased in harder endocarps.
JOURNAL OF ECOLOGY
(2022)
Review
Ecology
Haldre S. Rogers, Isabel Donoso, Anna Traveset, Evan C. Fricke
Summary: Seed dispersal is crucial for the persistence and spread of plant populations, as most plant species rely on animals to disperse their seeds. Loss of dispersers can lead to changes in plant populations, community patterns, and ecosystem functioning.
ANNUAL REVIEW OF ECOLOGY, EVOLUTION, AND SYSTEMATICS, VOL 52, 2021
(2021)
Article
Agronomy
Fernando Bastida, Julio Menendez, Daniel Camacho, Jose L. Gonzalez-Andujar
Summary: The demography of weeds with wind-mediated long distance seed movement can be influenced by extra-field seed-source populations, with the spatial distribution of seeds being significantly affected by wind patterns. The study also found that seed dispersal distances vary based on wind direction and time, highlighting the importance of understanding temporal and spatial patterns for effective management.
Article
Ecology
Trevor H. Drees, Katriona Shea
Summary: Climate change can greatly change how organisms disperse, especially for wind-dispersed plants. This study investigates the effects of climate change on the distribution of flower head heights and its impact on seed dispersal. The results show that considering all points of seed release is important for accurate simulation of dispersal.
Article
Plant Sciences
Barbara Seget, Michal Bogdziewicz, Jan Holeksa, Mateusz Ledwon, Lukasz Piechnik, Fiona Milne-Rostkowska, Katarzyna Kondrat, Magdalena Zywiec
Summary: This study investigates the relationship between fruit production and seedling recruitment in rowan trees, and finds that high fruit production increases the proportion of fruits recruiting into seedlings both near and far from rowans. This finding provides support for both animal dispersal and predator satiation hypotheses, suggesting that both mechanisms can operate simultaneously.
JOURNAL OF ECOLOGY
(2022)
Article
Zoology
Hui Yao, Yanpei Bai, Yuan Chen, Haochun Chen, Wanji Yang, Xiangdong Ruan, Zuofu Xiang
Summary: Research suggests that colobine monkeys mainly disperse small seeds through potential endozoochory, especially seeds from multi-seeded fruits, which enhances plant recruitment by promoting seedling growth.
INTEGRATIVE ZOOLOGY
(2021)
Article
Agronomy
Francuois Mueller, Letty Masemola, Ethan Britz, Nothando Ngcobo, Stephen Modiba, Lilburne Cyster, Igshaan Samuels, Clement Cupido, Lincoln Raitt
Summary: Climate change in Mediterranean-like regions of South Africa has led to changes in rainfall patterns and increased occurrences of out-of-season rain. This study examines the responses of different plant species to drought stress at different stages of development and identifies several species that have better drought tolerance and should be prioritized for further research.
Article
Horticulture
Herika Paula Pessoa, Laercio Junio Da Silva, Rafael Ravanelli Chagas, Mariane Goncalves Ferreira Copati, Francoise Dalpra Dariva, Felipe de Oliveira Dias, Carlos Nick Gomes
Summary: This study evaluated seed germination performance and seedling vigour traits of several Solanum pennellii introgression lines (IL's) and selected ideal lines for seed germination and vigour. Candidate genes for seed germination and vigour were identified through a multi-trait index and the closest IL's to the ideotype were determined. Fine mapping, validation, and further investigation of these candidate genes will provide valuable insights into the genetics of seed quality.
SCIENTIA HORTICULTURAE
(2021)
Article
Forestry
Katarina Tumpa, Antonio Vidakovic, Damir Drvodelic, Mario Sango, Marilena Idzojtic, Ivan Perkovic, Igor Poljak
Summary: Seed size positively influences seedling height and root collar diameter, but does not have a significant impact on germination rate and sturdiness quotient. Significant differences were found between Mediterranean and continental populations, with higher values observed in the coastal Mediterranean populations.
Review
Plant Sciences
Aniruddha Maity, Amrit Lamichaney, Dinesh Chandra Joshi, Ali Bajwa, Nithya Subramanian, Michael Walsh, Muthukumar Bagavathiannan
Summary: Seed shattering is a natural phenomenon in wild and weedy plant species, controlled by genetics but influenced by environmental conditions and management practices. While undesirable in domesticated crops, it serves as a crucial survival mechanism for weeds, aiding in efficient seed dispersal and soil seedbank development. Weed species have evolved variations in seed shattering as an adaptation to changing management regimes, presenting challenges for agricultural weed management but also opportunities for innovative approaches such as harvest weed seed control.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Ecology
K. C. Cushman, James R. Kellner
Article
Geochemistry & Geophysics
James R. Kellner, John Armston, Markus Birrer, K. C. Cushman, Laura Duncanson, Christoph Eck, Christoph Falleger, Benedikt Imbach, Kamil Kral, Martin Krucek, Jan Trochta, Tomas Vrska, Carlo Zgraggen
SURVEYS IN GEOPHYSICS
(2019)
Editorial Material
Plant Sciences
James R. Kellner, Loren P. Albert, John T. Burley, K. C. Cushman
AMERICAN JOURNAL OF BOTANY
(2019)
Article
Environmental Sciences
Tamara E. Rudic, Lindsay A. McCulloch, Katherine Cushman
Editorial Material
Plant Sciences
K. C. Cushman, Jose-Luis Machado
Article
Environmental Sciences
Martin Krucek, Kamil Kral, K. C. Cushman, Azim Missarov, James R. Kellner
Review
Plant Sciences
Helene C. Muller-Landau, K. C. Cushman, Eva E. Arroyo, Isabel Martinez Cano, Kristina J. Anderson-Teixeira, Bogumila Backiel
Summary: Tropical forests exhibit varying biomass and productivity levels based on factors such as humidity, elevation, temperature, and soil fertility. Areas with higher disturbance experience lower wood residence time and biomass. These variations are influenced by both direct effects of changing environments on forest carbon fluxes and shifts in functional composition.
Article
Ecology
K. C. Cushman, Sarayudh Bunyavejchewin, Dairon Cardenas, Richard Condit, Stuart J. Davies, Alvaro Duque, Stephen P. Hubbell, Somboon Kiratiprayoon, Shawn K. Y. Lum, Helene C. Muller-Landau
Summary: Accurately projecting global carbon dynamics requires understanding controls over temporal and spatial tropical forest biomass variation, with errors in estimates often due to nonstandard and changing measurement heights. This study measured trunk taper for buttressed trees in lowland tropical forests and proposed a general taper model to reduce bias in biomass estimates. Factors such as diameter, buttress height, and wood density were found to influence trunk taper variation, with the model producing site-level biomass estimates within 3.4% of measured taper estimates.
Article
Ecology
K. C. Cushman, Matteo Detto, Milton Garcia, Helene C. Muller-Landau
Summary: This study used drone photogrammetry to measure spatial variation in canopy disturbance rates in a 1500 ha forest in Central Panama. The results showed that soil type, forest age, and topography were the main predictors of disturbance rate variation.
Article
Environmental Sciences
Loren P. Albert, K. C. Cushman, Yuqin Zong, David W. Allen, Luis Alonso, James R. Kellner
Summary: This study quantifies the impact of spectral stray light on the retrieval of solar-induced chlorophyll fluorescence (SIF) using a high-resolution imaging spectrometer. The findings show that spectral stray light can introduce positive or negative biases, ranging from less than +/- 1% to over 30% of SIF. The results have important implications for spectral stray light corrections in SIF remote sensing.
REMOTE SENSING OF ENVIRONMENT
(2023)
Article
Environmental Sciences
K. C. Cushman, John Armston, Ralph Dubayah, Laura Duncanson, Steven Hancock, David Janik, Kamil Kral, Martin Krucek, David M. Minor, Hao Tang, James R. Kellner
Summary: In this study, the sensitivity of Global Ecosystem Dynamics Investigation (GEDI) data and aboveground biomass density (AGBD) predictions to leaf phenology was tested. The results suggest that, with consideration of model choice, GEDI data without considering leaf status can be used for AGBD prediction, which increases data availability and reduces sampling error in some forests.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Geography, Physical
Calvin Ka Fai Lee, Guangqin Song, Helene C. Muller-Landau, Shengbiao Wu, S. Joseph Wright, K. C. Cushman, Raquel Fernandes Araujo, Stephanie Bohlman, Yingyi Zhao, Ziyu Lin, Zounachuan Sun, Peter Chuen Yan Cheng, Michael Kwok-Po Ng, Jin Wu
Summary: A method integrating deep learning algorithm with high resolution imagery from drone surveys was developed to accurately detect flowering species and track flowering timing in a tropical forest. The method demonstrated high accuracy in classifying flowers and showed potential in advancing fine-scale flower monitoring in the tropics.
ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
(2023)
Article
Environmental Sciences
K. C. Cushman, Sassan Saatchi, Ronald E. McRoberts, Kristina J. Anderson-Teixeira, Norman A. Bourg, Bruce Chapman, Sean M. McMahon, Christopher Mulverhill
Summary: Emerging satellite radar and lidar platforms can provide valuable information on aboveground biomass (AGB), but there is a need to estimate and propagate uncertainties in AGB maps due to the spatial resolution limitations. This study presents a workflow to estimate AGB uncertainty using lidar-based models and small field plots, and recommends measuring larger field plots for better calibration or validation of satellite-based map products.
Article
Archaeology
Parker VanValkenburgh, K. C. Cushman, Luis Jaime Castillo Butters, Carol Rojas Vega, Carson B. Roberts, Charles Kepler, James Kellner
JOURNAL OF FIELD ARCHAEOLOGY
(2020)
Proceedings Paper
Optics
Loren P. Albert, K. C. Cushman, David W. Allen, Yuqin Zong, Luis Alonso, James R. Kellner
ALGORITHMS, TECHNOLOGIES, AND APPLICATIONS FOR MULTISPECTRAL AND HYPERSPECTRAL IMAGERY XXV
(2019)