Results 41 to 50 of about 3,593 (196)

Spatial distribution pattern of the endangered endemic cycad Ceratozamia fuscoviridis (Zamiaceae) in central Mexico

Plant Species Biology, Volume 40, Issue 6, Page 572-583, November 2025.
Spatial distribution pattern were studied for Ceratozamia fuscoviridis, an endangered species in Mexico, based on Ripley's K t and K 12 analysis. Clumped spatial distribution patters was found in individuals of all populations, suggesting low interaction with predators/dispersers and/or evidence of suitable microsites for cycads.
María Teresa Pulido Silva, Juan Carlos Flores‐Vázquez, Maricela Vargas‐Zenteno, Aurelia Vite Reyes, Andrew P. Vovides   +4 more
wiley   +1 more source

Progress in the study of dioecy in Mexican cycad species and its implications for conservation

Plant Species Biology, Volume 40, Issue 6, Page 556-571, November 2025.
Cycads are endangered dioecious plants of great ornamental value that have a long period of sexual maturity. Therefore, it is crucial to have methods for early sex determination that can help to develop effective strategies for their conservation. Abstract Dioecy is a system of sexual reproduction in plants, characterized by the spatial separation of ...
Lourdes Georgina Iglesias Andreu, María Ydelia Sánchez‐Tinoco, Miguel Angel Perez‐Farrera   +2 more
wiley   +1 more source

LEAFLET ANATOMY OF ZAMIA DISODON D.W. STEV. & SABATO AND Z. RESTREPOI (D.W. STEV.) A. LINDSTR.

Caldasia, 2013
The genus Zamia is morphologically and ecologically the most diverse of theCycadales. Colombia is the country where most living species of Zamia have beenrecorded.
Acuña Castillo Rafael, Marín Méndez Walter   +1 more
doaj  

Preface of Special Feature “Current topics on cycad biology: Deciphering the Rosetta Stone of plant evolution.” Part II: Perspectives from natural history

Plant Species Biology, Volume 40, Issue 6, Page 527-529, November 2025.
Often regarded as “living fossils,” cycads are well known for retaining many ancestral traits, which makes them particularly fascinating to naturalists and scientists alike. Cycads provide insights into the functional and developmental processes underlying the origin and diversification of seed plants, and they may help clarify how they colonized the ...
José Said Gutiérrez‐Ortega
wiley   +1 more source

Synergistic Effects on the Mechanical, Thermal, and Morphological Properties of HDPE Composites Reinforced With Walnut Shell and Nano‐Calcium Carbonate

Journal of Applied Polymer Science, Volume 142, Issue 37, October 5 2025.
This study explores the mechanical properties of HDPE‐based composites reinforced with walnut shell (WS) and Nano‐CaCO3. The addition of Nano‐CaCO3 enhanced tensile and flexural strength, demonstrating its reinforcing effect. These findings highlight the potential of HDPE/WS/Nano‐CaCO3 composites for structural applications, offering insights into ...
İdris Karagöz, Halil İbrahim Duyar, Aysu Çavuşoğlu, Harun Sepetcioglu   +3 more
wiley   +1 more source

The Effect of Polyethylene Fiber Addition and Fiber Length on the Behavior of Tensile Loaded Ferrofoam Concrete Plates [PDF]

E3S Web of Conferences
This study investigates the influence of adding polyethylene fibers and varying their lengths on the behavior of ferrofoam concrete plates under tensile loading.
Abdullah, Zuhri Zamia Minan, Abdullah Nora, Fauzi Muhammad   +3 more
doaj   +1 more source

Most young leaves pale in comparison to mature leaves: delayed greening is neither binary nor tropical

Ecography, Volume 2025, Issue 9, September 2025.
Delayed greening, the phenomenon in which expanding leaves appear red, blue or pale green due to low chlorophyll content, has long intrigued ecologists. However, little is known about what type of species are most likely to delay greening or which environmental conditions are associated with delayed greening.
Giancarlo M. Chiarenza, Angela T. Moles
wiley   +1 more source

A quantitative comparison of dispersed spore/pollen and plant megafossil assemblages from a Middle Jurassic plant bed from Yorkshire, UK [PDF]

, 2015
Detailed quantitative data has previously been collected from plant megafossil assemblages from a Middle Jurassic (Aalenian) plant bed from Hasty Bank, North Yorkshire, UK.
Bhowmik, Boulter, Chaloner, Chaloner, Charles H. Wellman, Couper, Cox, Crane, Dettmann, Filatoff, Gedl, Gray, Hammer, Hammer, Hancock, Harris, Harris, Harris, Harris, Harris, Harris, Harris, Harris, Harris, Hemingway, Hill, Hill, Hubbard, Klavins, Legendre, Levin, Lindley, Nami, Norstog, Parry, Picket, Sam M. Slater, Scheihing, Schweitzer, Traverse, van Konijnenburg-van Cittert, van Konijnenburg-van Cittert, van Konijnenburg-van Cittert, van Konijnenburg-van Cittert, van Konijnenburg-van Cittert, Wilson, Ziaja   +46 more
core   +3 more sources

Best in the company of nearby males: female success in the threatened cycad, Zamia portoricensis [PDF]

PeerJ, 2018
Variation in plant reproductive success is affected by ecological conditions including the proximity of potential mates. We address the hypothesis that spatial distribution of sexes affects female reproductive success (RS) in the dioecious cycad, Zamia ...
Julio C. Lazcano-Lara, James D. Ackerman
doaj   +2 more sources

Population genetics of Zamia decumbens (Zamiaceae, Cycadales), an endangered cycad from the Maya Mountains of Belize

Plant Species Biology, Volume 40, Issue 4, Page 324-340, July 2025.
We utilized 10 microsatellite loci to examine the genetic diversity, genetic structure, and demographic history of Zamia decumbens Calonje, Meerman, M.P. Griff. & Hoese, an endangered cycad species occurring in small disjunct populations on karst topography within the Maya Mountains of Belize.
Michael Calonje, Alan W. Meerow, Jan Meerman, Javier Francisco‐Ortega, M. Patrick Griffith   +4 more
wiley   +1 more source