Publications by authors named "John C Tweddle"
Citizen science-the involvement of volunteers in data collection, analysis and interpretation-simultaneously supports research and public engagement with science, and its profile is rapidly rising. Citizen science represents a diverse range of approaches, but until now this diversity has not been quantitatively explored. We conducted a systematic internet search and discovered 509 environmental and ecological citizen science projects.
View Article and Find Full Text PDFWe used correlated divergence analysis to determine which factors have been most closely associated with changes in seed mass during seed plant evolution. We found that divergences in seed mass have been more consistently associated with divergences in growth form than with divergences in any other variable. This finding is consistent with the strong relationship between seed mass and growth form across present-day species and with the available data from the paleobotanical literature.
View Article and Find Full Text PDFArticle Synopsis
- Improved phylogenetic methods and comprehensive data allow for detailed analysis of trait evolution in seed plants, focusing on seed mass across 12,987 species.
- The study reveals that the most significant change in seed mass occurred during the split between angiosperms and gymnosperms, with notable divergence found between the Celastraceae and Parnassiaceae families.
- Furthermore, wide variations in seed size are more closely linked to changes in plant growth form rather than dispersal methods or geographic location, indicating a coordinated evolution of seed size and growth form.