Results 101 to 110 of about 1,000,186 (343)

Canadian crop calendars in support of the early warning project [PDF]

The Canadian crop calendars for LACIE are presented. Long term monthly averages of daily maximum and daily minimum temperatures for subregions of provinces were used to simulate normal daily maximum and minimum temperatures.
Hodges, T., Trenchard, M. H.
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Reinstatement and generic reassignment of Phyllanthus asteranthos Croizat (Phyllanthaceae) based on living plant observations and specimen analysis

Nordic Journal of Botany, EarlyView.
Phyllanthus asteranthos Croizat has been treated as a synonym of P. pulcher Wall. ex Müll. Arg. (syn. Nymphanthus glaucescens (Miq.) R.W.Bouman) since 1987. Through detailed morphological observations of living plants and critical examinations of type materials and additional specimens, this study revealed that the two taxa are morphologically very ...
Feng Yang, Li‐Ju Jiang, Huan‐Chong Wang   +2 more
wiley   +1 more source

Rediscovery of Passiflora clypeophylla (subgenus Decaloba): a highly threatened and narrow endemic species found within a karstic canyon in Guatemala

Nordic Journal of Botany, EarlyView.
Passiflora clypeophylla, an endemic species to the Guatemalan karstic forests last seen in 1889 and deemed extinct, was rediscovered in the Department of Alta Verapaz, east of Cobán. The species was known only from a single specimen hailed from the type locality, Rubel Cruz, where it has been found again. An additional location has been identified in a
J.R. Kuethe, Dennis I. Medina, Saban Sequen, Maura L. Quezada   +3 more
wiley   +1 more source

Rethinking False Spring Risk [PDF]

Temperate plants are at risk of being exposed to late spring freezes. These freeze events - often called false springs - are one of the strongest factors determining temperate plants species range limits and can impose high ecological and economic damage.
Chamberlain, C. J., Cook, B. I., Garcia de Cortazar Atauri, I., Wolkovich, E. M.   +3 more
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Quantitative genetics of multidimensional plasticity in spring phenology

, 2022
Changing environmental conditions cause changes in the distributions of phenotypic traits in natural populations. Adaptation to environmental conditions can occur via micro-evolution, and, likely more often, via phenotypic plasticity. Phenotypic plasticity, when heritable, itself also has the potential for a micro-evolutionary response to selection ...
Maria Moiron, Birgen Haest, Celine Teplitsky, Andreas Dänhardt, Sandra Bouwhuis, Anne Charmantier   +5 more
openaire   +1 more source

Sedum zhenghaianum (Crassulaceae), a new species from Zhejiang and Jiangxi, East China

Nordic Journal of Botany, EarlyView.
In this paper, Sedum zhenghaianum sp. nov. is described as a new species based on morphological and molecular analyses, and its taxonomic relationships are discussed. Morphological analysis indicates that S. zhenghaianum should be classified in the genus Sedum sect. Sedum and is distinct from the related species S. tosaense in morphology, e.g.
Shi‐Qi She, Shi‐Guo Huang, Yang Zhang, Shen‐Hao Yao, Zong‐Wei Zhu, Xin Zhou, Yue‐Liang Xu   +6 more
wiley   +1 more source

Litter dynamics and phenology of Melaleuca quinquenervia in south Florida [PDF]

, 2002
We monitored litterfall biomass at six different sites of melaleuca (Melaleuca quinquenervia (Cav.) S.T. Blake) forested wetlands in South Florida from July 1997 to June 1999.
Center, T.D., Pratt, P.D., Rayachhetry, M.B., Van, T.K.   +3 more
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Drivers of spring migration phenology in Rocky Mountain elk

Scientific Reports
By migrating, ungulates take advantage of cyclical fluctuations in resources, which allows them to persist at greater population numbers than they would in the absence of these seasonal movements. We sought to identify the drivers of spring elk (Cervus canadensis) migration and evaluate how well individuals were able to optimize access to forage prior ...
Storm Crews, Nathaniel D. Rayl, Mathew W. Alldredge, Eric J. Bergman, Charles R. Anderson, Guillaume Bastille-Rousseau   +5 more
openaire   +3 more sources

Pinguicula brendae (Lentibulariaceae) sp. nov., a carnivorous plant from a tropical montane cloud forest in Hidalgo, Mexico

Nordic Journal of Botany, EarlyView.
A new species of Lentibulariaceae, Pinguicula brendae Rodríguez‐Ramírez, H.Shimai & A.R. Andrés‐Hernández, is described based on its unique morphological characteristics. This species is restricted to limestone rock walls in the San Bartolo Tutotepec municipality, central‐eastern Hidalgo, Mexico, where it inhabits a single locality on vertical, north ...
Ernesto C. Rodríguez‐ Ramírez, Hiro Shimai, Agustina R. Andrés‐ Hernández   +2 more
wiley   +1 more source

Phenological Gardens Protocol [PDF]

, 2003
The purpose of this resource is to observe the flowering and leaf stages of selected garden plants throughout the year. After a phenological garden is planted, students observe the growth of leaves and blooming of flowers on the plants. These plants were
The GLOBE Program, University Corporation for Atmospheric Research (UCAR)
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