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11 results for “Spider species richness”
Figure 2 in Prospects for using DNA barcoding to identify spiders in species-rich genera
Figure 2. Box-and-whisker plots of average intraspecific divergence for 16 genera represented by more than 3 species (Neriene, Pimoa, and Theridion were excluded). The life history of each genus is also indicated.
Figure 1 in Prospects for using DNA barcoding to identify spiders in species-rich genera
Figure 1. Cumulative number of spider species described over time, including only species that are currently valid (description years for all valid species follow Platnick 2009).
Figure 5 in Prospects for using DNA barcoding to identify spiders in species-rich genera
Figure 5. Maximum intraspecific divergence compared with nearest-neighbor distance using all data for the four categories of topology: A monophyletic (133 cases), B nested (23 cases), C paraphyletic (28 cases), and D intermingled (16 case). See Methods for definitions. 89.7% of monophyletic and nested species fall above the 1:1 line, indicating the presence of a barcode gap, while 90.9% of paraphyletic and intermingled species fall below this line.
Figure 4 in Prospects for using DNA barcoding to identify spiders in species-rich genera
Figure 4. Maximum intraspecific divergence compared with nearest-neighbour distance of monophyletic morphospecies for all data and using only new data, which have been identified by a single spider taxonomist. Most species (92.5%) fall above the 1:1 line, indicating the presence of a "barcode gap".
Figure 2 in Spiders (Arachnida: Araneae) of Saba Island, Lesser Antilles: Unusually high species richness indicates the Caribbean Biodiversity Hotspot is woefully undersampled
Figure 2. Spider species richness by island area showing dramatic undersampling of most islands and lack of expected positive species-area relationship. Islands are ordered by size from smaller to larger as follows: Saba, Nevis, St. Kitts, Antigua, Grenada, Turks and Caicos, Barbados. See text for data sources.
Figure 1 in Spiders (Arachnida: Araneae) of Saba Island, Lesser Antilles: Unusually high species richness indicates the Caribbean Biodiversity Hotspot is woefully undersampled
Figure 1. Saba Island (17o38'N, 63o14'W), Lesser Antilles. Thirty-three collection sites mapped using Google Earth. Numbers correspond to sites listed in Table 1.
FIGURE 5. Species richness estimations slopes. Jack 2s in A protocol for online documentation of spider biodiversity inventories applied to a Mexican tropical wet forest (Araneae, Araneomorphae)
FIGURE 5. Species richness estimations slopes. Jack 2s indicates the slope average for these estimations based on incidence (BAT) and abundance (Bat and Estimates). Same averages were calculated for Jack 1s and Chao 1 and 2 estimation slopes. Column indicated with (*) correspond to the slope value for pitfalls under Chao's estimations.
Figure 3 in Prospects for using DNA barcoding to identify spiders in species-rich genera
Figure 3. Bar graph with standard errors showing the differences in mean (in black) and maximum (in grey) intraspecific divergence as well as nearest-neighbor distance (in white) between the three geographical distribution categories.
Figure 3 in Abundance, species richness and diversity of the orb-weaving spider families Araneidae, Nephilidae and Tetragnathidae in natural habitats in Trinidad, West Indies
Figure 3. The absence of a relationship between mean niche breadth of species and observed species richness at a locality, for 46 localities with natural habitats; r = −0.12, P = 0.42.
Figure 2 in Abundance, species richness and diversity of the orb-weaving spider families Araneidae, Nephilidae and Tetragnathidae in natural habitats in Trinidad, West Indies
Figure 2. The weak relationship between observed species richness and abundance of individuals in the sample, for 46 localities with natural habitats; r = 0.45, P = 0.002.
Figure 1 in Abundance, species richness and diversity of the orb-weaving spider families Araneidae, Nephilidae and Tetragnathidae in natural habitats in Trinidad, West Indies
Figure 1. Map of Trinidad showing the location of sampling localities of natural habitats.
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