Delving into the Datasets II: ‘CORVEG’ Site-based Floristic Data in Queensland

Abstract

The collection and databasing of information on species distributions ultimately shapes our ability to conserve and manage biota. Retrospective analysis of trends provides a means to assess the utility of databases for such purposes. This article analyses the Queensland Herbarium's site-based floristic dataset, CORVEG, using data from the South-east Queensland Bioregion. Despite the limited geographical extent of this study, the issues considered are relevant to all taxa-based dataseis. Analysis showed significant differences (P < 0.01) in dataset completeness between recorders, the number of recorders, sampling level, sampling floristics and sampling period. Clear improvements in data and a corresponding decrease in the amount of missing data were evident in the past decade, apparently as a consequence of more explicit sampling protocols. Examination of species richness trends revealed that sites with missing sampling information were of a level comparable to those sites subject to detailed floristic and site sampling for eucalypt and rainforest vegetation types. This highlights the need for complete and consistent records when databasing information. The results demonstrate ongoing improvement in the CORVEG dataset. To build on these gains, it is recommended that greater consideration is given to the current and future uses of such data, including the implementation of a stratified network of permanently marked plots serving multiple biodiversity research and management objectives.