Richard Helms
Helms; Richard Hehns; R. Helms; Rich. Helms
12 Dezembro, 1842 – 17 Julho, 1914
botanist, entomologist, explorer, naturalist, dentist, botanical collector, collector, zoological collector, hunter
German born Australian/New Zealand botanist, entomologist, explorer and collector (1842-1914)
Ciência habilitada por dados de espécimes
Vasconcelos, T., J. D. Boyko, and J. M. Beaulieu. 2021. Linking mode of seed dispersal and climatic niche evolution in flowering plants. Journal of Biogeography. https://doi.org/10.1111/jbi.14292
Aim: Due to the sessile nature of flowering plants, movements to new geographical areas occur mainly during seed dispersal. Frugivores tend to be efficient dispersers because animals move within the boundaries of their preferable niches, so seeds are more likely to be transported to environments tha…
Benhadi-Marín, J., A. Fereres, and J. A. Pereira. 2021. Potential areas of spread of Trioza erytreae over mainland Portugal and Spain. Journal of Pest Science 95: 67–78. https://doi.org/10.1007/s10340-021-01440-w
Trioza erytreae is one natural psyllid vector of Candidatus liberibacter, the causal agent of the citrus greening disease (HLB). Since its introduction in 2014 into the Iberian Peninsula, T. erytreae was able to spread continuously toward southern coastal regions of Portugal and northern coastal reg…
Xue, T., S. R. Gadagkar, T. P. Albright, X. Yang, J. Li, C. Xia, J. Wu, and S. Yu. 2021. Prioritizing conservation of biodiversity in an alpine region: Distribution pattern and conservation status of seed plants in the Qinghai-Tibetan Plateau. Global Ecology and Conservation 32: e01885. https://doi.org/10.1016/j.gecco.2021.e01885
The Qinghai-Tibetan Plateau (QTP) harbors abundant and diverse plant life owing to its high habitat heterogeneity. However, the distribution pattern of biodiversity hotspots and their conservation status remain unclear. Based on 148,283 high-resolution occurrence coordinates of 13,450 seed plants, w…
Schneider, K., D. Makowski, and W. van der Werf. 2021. Predicting hotspots for invasive species introduction in Europe. Environmental Research Letters 16: 114026. https://doi.org/10.1088/1748-9326/ac2f19
Plant pest invasions cost billions of Euros each year in Europe. Prediction of likely places of pest introduction could greatly help focus efforts on prevention and control and thus reduce societal costs of pest invasions. Here, we test whether generic data-driven risk maps of pest introduction, val…
Ma, C.-S., W. Zhang, Y. Peng, F. Zhao, X.-Q. Chang, K. Xing, L. Zhu, et al. 2021. Climate warming promotes pesticide resistance through expanding overwintering range of a global pest. Nature Communications 12. https://doi.org/10.1038/s41467-021-25505-7
Climate change has the potential to change the distribution of pests globally and their resistance to pesticides, thereby threatening global food security in the 21st century. However, predicting where these changes occur and how they will influence current pest control efforts is a challenge. Using…
Chauhan, H. K., S. Oli, A. K. Bisht, C. Meredith, and D. Leaman. 2021. Review of the biology, uses and conservation of the critically endangered endemic Himalayan species Nardostachys jatamansi (Caprifoliaceae). Biodiversity and Conservation 30: 3315–3333. https://doi.org/10.1007/s10531-021-02269-6
The commercial demand for Nardostachys jatamansi in the global market has raised concern about its long-term sustainability. The genus Nardostachys is represented by the single species (Nardostachys jatamansi) endemic to the Himalayas. This study reviews biology, uses, threats, knowledge gaps, and c…
Mairal, M., S. L. Chown, J. Shaw, D. Chala, J. H. Chau, C. Hui, J. M. Kalwij, et al. 2021. Human activity strongly influences genetic dynamics of the most widespread invasive plant in the sub‐Antarctic. Molecular Ecology 31: 1649–1665. https://doi.org/10.1111/mec.16045
The link between the successful establishment of alien species and propagule pressure is well-documented. Less known is how humans influence the post-introduction dynamics of invasive alien populations. The latter requires studying parallel invasions by the same species in habitats that are differen…
de Oliveira, M. H. V., B. M. Torke, and T. E. Almeida. 2021. An inventory of the ferns and lycophytes of the Lower Tapajós River Basin in the Brazilian Amazon reveals collecting biases, sampling gaps, and previously undocumented diversity. Brittonia 73: 459–480. https://doi.org/10.1007/s12228-021-09668-7
Ferns and lycophytes are an excellent group for conservation and species distribution studies because they are closely related to environmental changes. In this study, we analyzed collection gaps, sampling biases, richness distribution, and the species conservation effectiveness of protected areas i…
Mazijk, R., M. D. Cramer, and G. A. Verboom. 2021. Environmental heterogeneity explains contrasting plant species richness between the South African Cape and southwestern Australia. Journal of Biogeography 48: 1875–1888. https://doi.org/10.1111/jbi.14118
Aim: Given the importance of environmental heterogeneity as a driver of species richness through its effects on species diversification and coexistence, we asked whether the dramatic difference in species richness per unit area between two similar Mediterranean‐type biodiversity hotspots is explaine…
Iqbal, I., A. Shabbir, K. Shabbir, M. Barkworth, F. Bareen, and S. Khan. 2020. Evolvulus nummularius (L.) L. (Convolvulaceae): a new alien plant record for Pakistan. BioInvasions Records 9: 702–711. https://doi.org/10.3391/bir.2020.9.4.04
Evolvulus nummularius (L.) L., a member of the Convolvulaceae, is native to Mexico and South America but nowadays grows around the world in many tropical and subtropical regions. Its presence in Pakistan, where it has become naturalized, is reported here for the first time. It was first discovered i…