Data from: Checkerboard score-area relationships reveal spatial scales of plant community structure ...
Identifying the spatial scale at which particular mechanisms influence plant community assembly is crucial to understanding the mechanisms structuring communities. It has long been recognized that many elements of community structure are sensitive to area; however the majority of studies examining p...
| Main Authors: | , , , , , , , , , |
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| Format: | Dataset |
| Language: | English |
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Dryad
2017
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5061/dryad.5f876 https://datadryad.org/stash/dataset/doi:10.5061/dryad.5f876 |
| Summary: | Identifying the spatial scale at which particular mechanisms influence plant community assembly is crucial to understanding the mechanisms structuring communities. It has long been recognized that many elements of community structure are sensitive to area; however the majority of studies examining patterns of community structure use a single relatively small sampling area. As different assembly mechanisms likely cause patterns at different scales we investigate how plant species co-occurrence patterns change with sampling unit scale. We use the checkerboard score as an index of species segregation, and examine species C-score-sampling area patterns in two ways. First, we show via numerical simulation that the C-score-area relationship is necessarily hump shaped with respect to sample plot area. Second we examine empirical C-score-area relationships in arctic tundra, grassland, boreal forest, and tropical forest communities. The minimum sampling scale where species co-occurrence patterns were significantly ... : Devon - Pit 1Plant species presence/absence from Pit1 on Devon Island Nunavut.The site was on the Truelove Lowland, a 43 km2 polar oasis on Devon Island, Nunavut. Sample plots were located on dry beach ridges and had plant communities dominated by low growing perennials such as Salix arctica, Dryas integrifolia and Carex spp.The rectangular plot (90 x 220 cm) was surveyed in July 2008. The plot was divided into contiguous 10 cm by 10 cm quadrats and species presence in each quadrat was recorded to produce a stem map precise to the nearest 10 cm. Variables PX and PY record the coordinates of the center of each 10cm by 10cm subquadrat. Variable species is a species code drawn from the genus and species names of the vascular plants present. Citation for this dataset is: Lamb, E. G. et al. 2016. A high-throughput belowground plant diversity assay using next-generation sequencing of the trnL intron. - Plant Soil 404: 361-372.Devon - Pit 2Plant species presence/absence from Pit2 on Devon Island Nunavut.The site ... |
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