Julian Alfred Steyermark
Julian Alfred Steyermark; Steyerm.; Steyermark; J.A. Steyermark; Julian Steyermark; J. A. Steyermark; Julian A. Steyermark
27. Januar 1909 – 15. Oktober 1988
botanist
American botanist (1909-1988)
http://www.wikidata.org/entity/Q250148
https://de.wikipedia.org/wiki/Julian_Alfred_Steyermark [Sehen]
Steyermark, Julian Alfred. 2024. Natural history specimens collected and/or identified and deposited. [Data set]. Zenodo. https://doi.org/10.5281/zenodo.8137499
Wissenschaft ermöglicht durch Exemplardaten
Joffard, N., F. Massol, M. Grenié, C. Montgelard, and B. Schatz. 2018. Effect of pollination strategy, phylogeny and distribution on pollination niches of Euro‐Mediterranean orchids I. Bartomeus [ed.],. Journal of Ecology 107: 478–490. https://doi.org/10.1111/1365-2745.13013
1.Pollination niches are important components of ecological niches and have played a major role in the diversification of Angiosperms. In this study, we focused on Euro‐Mediterranean orchids, which use diverse pollination strategies and interact with various functional groups of insects. In these or…
Antonelli, A., A. Zizka, F. A. Carvalho, R. Scharn, C. D. Bacon, D. Silvestro, and F. L. Condamine. 2018. Amazonia is the primary source of Neotropical biodiversity. Proceedings of the National Academy of Sciences 115: 6034–6039. https://doi.org/10.1073/pnas.1713819115
The American tropics (the Neotropics) are the most species-rich realm on Earth, and for centuries, scientists have attempted to understand the origins and evolution of their biodiversity. It is now clear that different regions and taxonomic groups have responded differently to geological and climati…
Xie, S.-P., S.-H. Zhang, T.-Y. Chen, X.-C. Zhang, X. Zeng, and Y. Yu. 2018. Late Miocene occurrence of monogeneric family Oleandraceae from southwest China and its implications on evolution of eupolypods I. Review of Palaeobotany and Palynology 256: 13–19. https://doi.org/10.1016/j.revpalbo.2018.05.002
Yunnan in SW China is a world renowned hotspot for diverse species of vascular plants such as ferns. However, fossil records of the Cenozoic ferns there are insufficient to clarify their phylogeny and historical biogeography from a geological perspective. Among these derived ferns, the monogeneric f…
VÁZQUEZ-GARCÍA, J.-A., D. A. NEILL, V. SHALISKO, F. ARROYO, and R. E. MERINO-SANTI. 2018. Magnolia mercedesiarum (subsect. Talauma, Magnoliaceae): a new Andean species from northern Ecuador, with insights into its potential distribution. Phytotaxa 348: 254. https://doi.org/10.11646/phytotaxa.348.4.2
Magnolia mercedesiarum, a new species from the eastern slopes of the Andes in northern Ecuador, is described and illustrated, and a key to Ecuadorian Magnolia (subsect. Talauma) is provided. This species differs from M. vargasiana in having broadly elliptic leaves that have an obtuse base vs. suborb…
Roberts, W. R., and E. H. Roalson. 2018. Phylogenomic analyses reveal extensive gene flow within the magic flowers ( Achimenes ). American Journal of Botany 105: 726–740. https://doi.org/10.1002/ajb2.1058
Premise of the Study: The Neotropical Gesneriaceae is a lineage known for its colorful and diverse flowers, as well as an extensive history of intra‐ and intergeneric hybridization, particularly among Achimenes (the magic flowers) and other members of subtribe Gloxiniinae. Despite numerous studies s…
Schley, R. J., M. de la Estrella, O. A. Pérez-Escobar, A. Bruneau, T. Barraclough, F. Forest, and B. Klitgård. 2018. Is Amazonia a ‘museum’ for Neotropical trees? The evolution of the Brownea clade (Detarioideae, Leguminosae). Molecular Phylogenetics and Evolution 126: 279–292. https://doi.org/10.1016/j.ympev.2018.04.029
The flora of the Neotropics is unmatched in its diversity, however the mechanisms by which diversity has accumulated are debated and largely unclear. The Brownea clade (Leguminosae) is a characteristic component of the Neotropical flora, and the species within it are diverse in their floral morpholo…
Wan, J.-Z., and C.-J. Wang. 2018. Expansion risk of invasive plants in regions of high plant diversity: A global assessment using 36 species. Ecological Informatics 46: 8–18. https://doi.org/10.1016/j.ecoinf.2018.04.004
Invasive plant species (IPS) have a high potential for expanding within biodiversity hotspots and threatening global plant diversity. Hence, it is urgent to assess the expansion risk of IPS in regions of high plant diversity and their potentially negative effects throughout the world. We used the wo…
Yañez-Arenas, C., L. Díaz-Gamboa, C. Patrón-Rivero, K. López-Reyes, and X. Chiappa-Carrara. 2018. Estimating geographic patterns of ophidism risk in Ecuador. Neotropical Biodiversity 4: 55–61. https://doi.org/10.1080/23766808.2018.1454762
The species richness of venomous snakes in Ecuador (~39 species) is among the highest in the world. However, until now no information exists regarding geographic patterns of ophidism. In this study, we present a detailed spatial snakebite risk map which was built by stacking weighted ecological nich…
Petersen, K. B., and M. Burd. 2018. The adaptive value of heterospory: Evidence from Selaginella. Evolution 72: 1080–1091. https://doi.org/10.1111/evo.13484
Heterospory was a pivotal evolutionary innovation for land plants, but it has never been clear why it evolved. We used the geographic distributions of 114 species of the heterosporous lycophyte Selaginella to explore the functional ecology of microspore and megaspore size, traits that would be corre…
Sheffield, C., and J. Heron. 2018. A new western Canadian record of Epeoloides pilosulus (Cresson), with discussion of ecological associations, distribution and conservation status in Canada. Biodiversity Data Journal 6: e22837. https://doi.org/10.3897/bdj.6.e22837
Background: Epeoloides pilosulus, one of the rarest bees in North America, is a cleptoparasite of Macropis bees which themselves are uncommon oligoleges of oil-producing Lysimachia flowers. Only two specimens of the cleptoparasite have been reported from Canada since the 1960s, both from Nova Scotia…