Find research datasets worth reusing

opencc-by-4.0Aug 2022View details →

Dataset used in "Deep learning with multisite data reveals the lasting effects of soil type, tillage and vegetation history on biopore genesis"

Please see the paper "Deep learning with multisite data reveals the lasting effects of soil type, tillage and vegetation history on biopore genesis" how the images were captured, manual counting was performed, training datasets were prepared and models were trained.

FIG. 5 in The marine vegetation of the Kerguelen Islands: history of scientific campaigns, inventory of the flora and first analysis of its biogeographical affinities

FIG. 5. — Graph of the similarity network between regions (coloured nodes) based on the Kerguelen macroalgae (black nodes) co-occurrence dataset (using ForceAtlas2 layout algorithm). Colour codes are the same as in Figure 1. Nodes size is relative to the number of species co-occurring in the Kerguelen Islands. 51 species of doubtful taxonomic status were not considered. Sites: AMS, Amsterdam I.; SPA, Saint-Paul I.; MAR, Marion I.; PED, Prince Edwards Is.; CRO, Crozet Is.; HEA, Heard and McDonald Is.; MAQ, Macquarie I.; AUK, Auckland Is.; CAM, Campbell Is.; FUE, Fuegia; FAL, Falkland Is.; SGI, South Georgia Is.; SSI, South Shetland Is.; SOI, South Orkney Is.; APE, Antarctic Peninsula; END, Enderby L.; McR, MacRobertson L.; QMA, Queen Mary L.; WIL, Wilkes L.; ADE, Adelie L.; VIC, Victoria L.

FIG. 4 in The marine vegetation of the Kerguelen Islands: history of scientific campaigns, inventory of the flora and first analysis of its biogeographical affinities

FIG. 4. — Number of marine macroalgae species reported in the Kerguelen Islands since the Ross expedition (1840), in each phylum (Delépine 1996 is a personnal communication to J.-P. Féral).

FIG. 3. — A in The marine vegetation of the Kerguelen Islands: history of scientific campaigns, inventory of the flora and first analysis of its biogeographical affinities

FIG. 3. — A, Number of nominal species per family of marine macroalgae of the Kerguelen Islands; B, taxonomic status (accepted, uncertain, co-occurrence in the Northern Hemisphere) of the species for the three considered phyla (Chlorophyta, Ochrophyta-Phaeophycae and Rhodophyta).

FIG. 2 in The marine vegetation of the Kerguelen Islands: history of scientific campaigns, inventory of the flora and first analysis of its biogeographical affinities

FIG. 2. — Location of historical collections of macroalgae in the Kerguelen Islands. Precise locations are not given by all reports and should be partly inferred. The map shows the sites visited during 1, the Ross expedition (Hooker 1844-1847); 2, the Challenger expedition (Dickie 1876a, b, c, e); 3, the US (Farlow 1876); 4, English (Dickie 1876d, f); and 5, German (Askenasy 1889); 6, Venus transit expeditions, as well as the German south polar expedition (Foslie 1908, Reinbold 1908). 7, The Hopeful Bay (Zinova 1973) was added.

FIG. 1 in The marine vegetation of the Kerguelen Islands: history of scientific campaigns, inventory of the flora and first analysis of its biogeographical affinities

FIG. 1. — Sub-Antarctic and Antarctic regions considered in the biogeographical analysis of the Kerguelen Islands marine macroalgae also occurring elsewhere in the Southern Ocean. Colours: orange, temperate Southern Africa; blue, sub-Antarctic Islands; light blue, sub-Antarctic New Zealand; light green, Magellanic region; green, Scotia Sea; violet, continental High Antarctic (after Spalding et al. 2007). Geographical coordinates are given in the inset.

opencc-zeroMay 2022View details →

dryad32/100

The relative influence of history, climate, topography and vegetation structure on local animal richness varies among taxa and spatial grains

Understanding the spatial scales at which environmental factors drive species richness patterns is a major challenge in ecology. Due to the trade-off between spatial grain and extent, studies tend to focus on a single spatial scale, and the effects of multiple environmental variables operating across spatial scales on the pattern of local species richness have rarely been investigated. Here, we related variation in local species richness of ground beetles, landbirds, and small mammals to variation in vegetation structure and topography, regional climate, biome diversity, and glaciation history for 27 sites across the USA at two different spatial grains. We studied the relative influence of broad-scale (landscape) environmental conditions using variables estimated at the site level (climate, productivity, biome diversity, and glacial era ice cover) and fine-scale (local) environmental conditions using variables estimated at the plot level (topography and vegetation structure) to explain local species richness. We also examined whether plot-level factors scale up to drive continental scale richness patterns. We used Bayesian hierarchical models and quantified the amount of variance in observed richness that was explained by environmental factors at different spatial scales. For all three animal groups, our models explained much of the variation in local species richness (85-89%), but site-level variables explained a greater proportion of richness variance than plot-level variables. Temperature was the most important site-level predictor for explaining variance in landbirds and ground beetles richness. Some aspects of vegetation structure were the main plot-level predictors of landbird richness. Environmental predictors generally had poor explanatory power for small mammal richness, while glacial era ice cover was the most important site-level predictor. Relationships between plot-level factors and richness varied greatly among geographical regions and spatial grains, and most relationships did not hold when predictors were scaled up to continental scale. Our results suggest that the factors that determine richness may be highly dependent on spatial grain, geography, and animal group. We demonstrate that instead of artificially manipulating the resolution to study multi-scale effects, a hierarchical approach that uses fine grain data at broad extents could help solve the issue of scale selection in environment-richness studies.

FIGURE 6 in Hidden in the dry woods: Mapping the collection history and distribution of Gymnanthes boticario, a well-collected but very recently described species restricted to the dry vegetation of South America

FIGURE 6. Distributional map of Gymnanthes boticario in the semiarid Caatinga of Northeastern Brazil, showing that when the species was described in 2010 collections were already available for seven of the ten Brazilian states where Caatinga occurs, including five of its eight Ecorregions (sensu Velloso et al.2002). States where we recorded the species: PI- Piauí; CE: Ceará; RN: Rio Grande do Norte; PB: Paraíba; PE: Pernambuco; BA: Bahia; MG: Minas Gerais (Map elaboration: M.F. Moro).

FIGURE 1 in Hidden in the dry woods: Mapping the collection history and distribution of Gymnanthes boticario, a well-collected but very recently described species restricted to the dry vegetation of South America

FIGURE 1. Number of collections per year of Gymnanthes boticario up to 2010, when the species was described.

FIGURE 7 in Hidden in the dry woods: Mapping the collection history and distribution of Gymnanthes boticario, a well-collected but very recently described species restricted to the dry vegetation of South America

FIGURE 7. Mapped distribution of Gymnanthes boticario in South America, a species typical of dry forests, including the first recorded occurrences to Bolivia, in the Chiquitano dry forests, to Paraguay, in the Cerro Léon, and to Mato Grosso do Sul, in the Pantanal (Map elaboration: M.F. Moro).

FIGURE 3 in Hidden in the dry woods: Mapping the collection history and distribution of Gymnanthes boticario, a well-collected but very recently described species restricted to the dry vegetation of South America

FIGURE 3. Number of duplicates of Gymnanthes boticario available in the consulted herbaria up to 2010, when the species was described

publicMay 2022View details →

dryad32/100

The relative influence of history, climate, topography and vegetation structure on local animal richness varies among taxa and spatial grains

Open the record for dataset details and reuse information.

Figures 48-59 from: Liu B, Williams DM (2020) From chaos to order: the life history of Hannaea inaequidentata (Lagerstedt) Genkal and Kharitonov (Bacillariophyta), from initial cells to vegetative cells. PhytoKeys 162: 81-112. https://doi.org/10.3897/phytokeys.162.56136

Figures 48-59 Hannaea inaequidentata, normal vegetative valves, LM48–59 12 valves showing diminution series, note slightly arcuate, lanceolate valve outlines, and largest valve (48) 4× longer than smallest (59).

Figures 38- 39 from: Liu B, Williams DM (2020) From chaos to order: the life history of Hannaea inaequidentata (Lagerstedt) Genkal and Kharitonov (Bacillariophyta), from initial cells to vegetative cells. PhytoKeys 162: 81-112. https://doi.org/10.3897/phytokeys.162.56136

Figures 38- 39 Hannaea inaequidentata, girdle view, SEM. 38, 39 details of two apices from Fig. 36, showing epivalves and hypovalves, 4:2 configuration of girdle bands in normal but not dividing vegetative frustule (lower frustule), 4:4 configuration of girdle bands in dividing vegetative frustule (upper frustule); note two new hypovalves (arrows) are interlocked by linking spines. Scale bars: 2 μm.

Figures 40-47 from: Liu B, Williams DM (2020) From chaos to order: the life history of Hannaea inaequidentata (Lagerstedt) Genkal and Kharitonov (Bacillariophyta), from initial cells to vegetative cells. PhytoKeys 162: 81-112. https://doi.org/10.3897/phytokeys.162.56136

Figures 40-47 Hannaea inaequidentata, SEM40–43 frustule details showing open girdle bands, note row of poroids interrupted at centre (42 arrow; also see Fig. 46, arrow) 44 valve with complete valvocopula 45–47 details of Fig. 44 showing open valvocopula (45 arrow), sawtooth-shaped projections attached to valve, internally visible over each virga (46 arrows; also see Fig. 41, arrows). Scale bars: 10 μm (40, 44), 2 μm (41–43, 45–47).

Figures 35-37 from: Liu B, Williams DM (2020) From chaos to order: the life history of Hannaea inaequidentata (Lagerstedt) Genkal and Kharitonov (Bacillariophyta), from initial cells to vegetative cells. PhytoKeys 162: 81-112. https://doi.org/10.3897/phytokeys.162.56136

Figures 35-37 Hannaea inaequidentata, girdle view, SEM35 colony with ca. 5 frustules 36 colony with two frustules 37 detail of Fig. 1, showing epivalves and hypovalves, distinct mantle plaques, fork-shaped interlocked linking spines at valve middle (arrowheads) and more acute spines towards each apex; note 4:2 configuration of girdle bands in three normal but not dividing vegetative frustules. Scale bars: 10 μm (35, 36), 5 μm (37).

Figures 22-28 from: Liu B, Williams DM (2020) From chaos to order: the life history of Hannaea inaequidentata (Lagerstedt) Genkal and Kharitonov (Bacillariophyta), from initial cells to vegetative cells. PhytoKeys 162: 81-112. https://doi.org/10.3897/phytokeys.162.56136

Figures 22-28 Hannaea cf. baicalensis, SEM. 22 complete valve, internal view, note rimoportula at each pole 23–28 detail of valve structure. Scale bars: 10 μm (22), 2 μm (23–28).

Figures 18-21 from: Liu B, Williams DM (2020) From chaos to order: the life history of Hannaea inaequidentata (Lagerstedt) Genkal and Kharitonov (Bacillariophyta), from initial cells to vegetative cells. PhytoKeys 162: 81-112. https://doi.org/10.3897/phytokeys.162.56136

Figures 18-21 Hannaea cf. arcus, SEM18 complete valve with valvocopula. 19–21 details of Fig. 18, note valvocopula with sawtooth-shaped projections attached to valve (19, 20, arrows), valvocopula open at one pole (21, arrow). Scale bars: 10 μm (18), 2 μm (19–21).

Figures 131-136 from: Liu B, Williams DM (2020) From chaos to order: the life history of Hannaea inaequidentata (Lagerstedt) Genkal and Kharitonov (Bacillariophyta), from initial cells to vegetative cells. PhytoKeys 162: 81-112. https://doi.org/10.3897/phytokeys.162.56136

Figures 131-136 Hannaea inaequidentata, details of pre-normal vegetative valves, internal view, SEM131, 132 two apices of Fig. 126 showing two rimoportulae per valve (two arrows) 133 middle part detail of Fig. 127 showing swollen central area and ghost striae 134 detail of Fig. 128 showing the bi-constricted middle part and ghost striae 135, 136 two apices of Fig. 130 showing two rimoportulae per valve. Scale bar: 2 μm (131–136).