Results 11 to 20 of about 2,040 (179)

Geographic factors and climatic fluctuation drive the genetic structure and demographic history of Cycas taiwaniana (Cycadaceae), an endemic endangered species to Hainan Island in China. [PDF]

Ecol Evol, 2022
Hainan Island had experienced several cold–warm and dry–humid fluctuations since the Late Pleistocene period, resulting in separating and connecting from the mainland several times with the cyclic rise and fall of sea level.
Wu LX, Xu HY, Jian SG, Gong X, Feng XY.
europepmc   +2 more sources

Conserving Large Old Trees in Guangxi, South China: Diversity, Distribution, and Preservation Strategies. [PDF]

Ecol Evol
This study comprehensively analyzes the diversity and distribution of over 500 year old large old trees (LOTs) in Guangxi, China, identifying 2630 LOTs from 149 species with a notable latitudinal gradient in richness. Tree vitality was found to be highest in rural and natural habitats like villages and scenic spots, compared to residential areas.
Yan J, Lin J, Wang A, Qie Y, Hu C, Zhang Z, Hu G.   +6 more
europepmc   +2 more sources

Spermatophyta Molecular Clock: Time Drift and Recent Acceleration. [PDF]

Plant Environ Interact
Exponential increase in the base substitution rate in recent geologic time. ABSTRACT Angiospermae radiation is widely recognized as a mid‐Cretaceous event, but the adaptive radiation of Asarum and Viola as spring ephemerals also occurred during the Quaternary. To better understand the evolution of Angiospermae through geological time, a robust and well‐
Osozawa S.
europepmc   +2 more sources

Ecological Isolation Maintains the Species Boundaries Between Two Sympatric <i>Cycas</i> From Southwest China. [PDF]

Ecol Evol
The study reveals that sympatric Cycas species (C. pectinata and C. simplicipinna) maintain strict species boundaries without hybridization, driven by reproductive isolation mechanisms (divergent coning times and pollinator specificity) and ecological niche differentiation (habitat preferences, soil pH differences).
Zheng F, Wang Y, Xi H, Xiao S, Feng X, Gong X, Liu J.   +6 more
europepmc   +2 more sources

Pest categorisation of Lepidosaphes pineti, L. pini and L. piniphila. [PDF]

EFSA J, 2023
Abstract The EFSA Panel on Plant Health performed a pest categorisation of Lepidosaphes pineti Borchsenius the pine oyster scale, Lepidosaphes pini (Maskell) the Oriental pine scale and Lepidosaphes piniphila Borchsenius (Hemiptera: Diaspididae) for the EU, following a commodity risk assessment of dwarfed Pinus parviflora grafted onto P.
EFSA Panel on Plant Health (PLH), Bragard C, Baptista P, Chatzivassiliou E, Di Serio F, Gonthier P, Jaques Miret JA, Justesen AF, Magnusson CS, Milonas P, Navas-Cortes JA, Parnell S, Potting R, Reignault PL, Stefani E, Thulke HH, Van der Werf W, Civera AV, Yuen J, Zappalà L, Grégoire JC, Malumphy C, Kertesz V, Maiorano A, MacLeod A.   +24 more
europepmc   +2 more sources

Anthropogenic Disturbances and Invasion of <i>Mikania micrantha</i> Threaten <i>Rauvolfia serpentina</i> Populations in Nepal. [PDF]

Ecol Evol
This research article investigate the current population dynamics of a threatened medicinal plant Rauvolfia serpentina.in differentially disturbed region of tropical forest in eastern Nepal. The findings revealed the cumulative impacts of over exploitation and invasion of Mikania micrantha have negatively impacted the population dynamics of R ...
Neupane A, Jnawali B, Ghimire SK.
europepmc   +2 more sources

Reconciling fossils with phylogenies reveals the origin and macroevolutionary processes explaining the global cycad biodiversity. [PDF]

New Phytol, 2023
Summary The determinants of biodiversity patterns can be understood using macroevolutionary analyses. The integration of fossils into phylogenies offers a deeper understanding of processes underlying biodiversity patterns in deep time. Cycadales are considered a relict of a once more diverse and globally distributed group but are restricted to low ...
Coiro M, Allio R, Mazet N, Seyfullah LJ, Condamine FL.   +4 more
europepmc   +2 more sources

Spatiotemporal Distribution Patterns and Conservation Priorities of Gymnosperms With Different Leaf Shapes in China Under Climate Change. [PDF]

Ecol Evol
This study modeled the spatiotemporal distribution patterns of 71 rare gymnosperm species (including varieties) with five different leaf morphologies in China in response to climate change and found that approximately half of the species will experience significant range contractions and migrate to higher altitudes toward the northwest.
Fu J, Song W, Wang C, Jiang X, Shen X, Yi R.   +5 more
europepmc   +2 more sources

Convergent Patterns of Karyotype Evolution Underlying Karyotype Uniformity in Conifers. [PDF]

Adv Sci (Weinh)
The remarkable karyotype uniformity observed in gymnosperms has long posed an evolutionary puzzle. This study proposes a model of karyotype evolution in gymnosperms, highlighting the rarity of both polyploidy and dysploidy as key factors underlying this uniformity.
Zhang RG, Liu H, Shang HY, Shu H, Liu DT, Yang H, Jia KH, Wang XQ, Sun WB, Zhao W, Ma Y.   +10 more
europepmc   +2 more sources

Taxonomic list of the vascular flora of the islands of San Andres and Old Providence, Colombia [PDF]

Check List, 2015
We present an updated list of 532 vascular plant species distributed in 375 genera and 110 families on the islands of San Andres and Old Providence, Colombia, based on a compilation of published literature and some additional observations.
Alexandra Tobar-Vargas, Takumasa Kondo
doaj   +3 more sources