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opencc-by-4.0Sep 2021View details →

Data from: Biodiversity and biogeographic affinity of benthic amphipods from the Yucatan Shelf: an analysis across the warm Northwest Atlantic ecoregions

The resource provides a list of 491 species representing the biodiversity of benthic amphipods from 12 ecoregions in the Northwest Atlantic. The dataset contains an Excel sheet with species occurrence data from benthic marine habitats of the continental shelf (< 200 m), forming a comprehensive collection of distributional data (presence-only) that was obtained from different sources and newly-sampled material in the Yucatan continental shelf, and sorted according to the ecoregions. This information form part of a published article in the journal Systematics and Biodiversity (Paz-Ríos et al. 2021). To link to this article: <a href="https://doi.org/10.1080/14772000.2021.1947920">https://doi.org/10.1080/14772000.2021.1947920</a> Eleven ecoregions defined by Spalding et al. (2007) were used for sorting species occurrence data; an additional ecoregion defined by Wilkinson et al. (2009) was also used to represent the species occurrence data in the Yucatan continental shelf. Ecoregion names: (BAH) Bahamian; (BER) Bermuda; (CAR) Carolinian; (ECA) Eastern Caribbean; (FLO) Floridian; (GRA) Greater Antilles; (NGM) Northern Gulf of Mexico; (SCA) Southern Caribbean; (SWCA) Southwestern Caribbean; (SGM) Southern Gulf of Mexico; (WCA) Western Caribbean; and (YUC) Yucatan.

FIG. 4 in Populations of a new morphotype of corrugate Lessonia Bory in the Beagle Channel, sub-Antarctic Magellanic ecoregion: a possible case of on-going speciation

FIG. 4. — Phylogenetic tree based on concatenated ITS1 and atp8-trnS partial sequences (418 bp). Note that corrugated Lessonia Bory specimens are grouped with Lessonia flavicans Bory specimens which have smooth blade surface. First number on the branches refers to the bootstrap value determined from the ML phylogeny and the second is the posterior probability from the BI analysis. Scale bar: 0.05 substitution per site.

FIG. 5 in Populations of a new morphotype of corrugate Lessonia Bory in the Beagle Channel, sub-Antarctic Magellanic ecoregion: a possible case of on-going speciation

FIG. 5. — Phylogenetic tree based on concatenated cox1 and cox3 partial sequences (1176 bp). Note that corrugated Lessonia Bory specimens are grouped with Lessonia flavicans Bory specimens which have smooth blade surface. First number on the branches refers to the bootstrap value determined from the ML phylogeny and the second is the posterior probability from the BI analysis. Scale bar: 0.01 substitution per site.

FIG. 3 in Populations of a new morphotype of corrugate Lessonia Bory in the Beagle Channel, sub-Antarctic Magellanic ecoregion: a possible case of on-going speciation

FIG. 3. — Internal morphology of the corrugate Lessonia Bory: A, small angular meristodermal cells on the surface of blade; B, transverse section through a sterile portion of the blade; C, detail of meristoderm and cortex showing cells with full (right arrow) and reduced (left arrow) protoplast and golden bodies in outer cortex and mid cortex; and rounded light refracting bodies (arrowheads); D, detail of medulla showing cylindrical cells (arrow) and some elongated filaments (arrowhead) immersed in a dense intercellular matrix; E, surface view of a sorus; F, transverse section through a sorus; G, detail of sorus. Abbreviations: mer, meristoderm; oc, outer cortex; mc, mid cortex; ic, inner cortex; m, medulla; p, paraphyses; l, part of the lacuna; s, sporangia. Scale bars: A, 15 µm; B, 50 µm; C, G, 20 µm; D, E, 40 µm; F, 30 µm.

FIG. 1 in Populations of a new morphotype of corrugate Lessonia Bory in the Beagle Channel, sub-Antarctic Magellanic ecoregion: a possible case of on-going speciation

FIG. 1. — Map of the sub-Antarctic ecoregion of Magellan showing the collection sites of the corrugate morphotype of Lessonia Bory, Lessonia flavicans Bory, and Lessonia searlesiana Asensi & Reviers. Strait of Magellan-Cockburn channel: a, Fuerte Bulnes; b, Carlos III Island. Beagle channel-Orange Bay: c, London Island; d, Puerto Aguirre; e, London Island; f, Cormoran Bay; g, Paula Cove; h, Puerto Toro; i, Tekenika Bay; j, Orange Bay. Cape Horn-Diego Ramirez Island: k, Diego Ramirez Island.

FIG. 2. — A in Populations of a new morphotype of corrugate Lessonia Bory in the Beagle Channel, sub-Antarctic Magellanic ecoregion: a possible case of on-going speciation

FIG. 2. — A, External morphology of the corrugate Lessonia Bory showing the brownish terete stipe; B, corrugated blades; C, that arise from the base of the blade and from dichotomously divided branches; D, the holdfast is rhizoidal in shape and composed mainly of fused haptera. Scale bars: holotype, 30 cm; A, C, 2 cm; B, 5 cm; D, 8 cm.

FIGURE 8. Labeo manasseeae, n in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin

FIGURE 8. Labeo manasseeae, n. sp. Holotype (AMNH 269110): CT scan renderings of A. posterior neurocranium, Weberian apparatus and proximal axial elements; B. isolated urohyal bone; and C. infraorbital series. Scale bars = 1 mm.

FIGURE 6. Labeo mbimbii, n in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin

FIGURE 6. Labeo mbimbii, n. sp. Holotype (AMNH 277862): CT scan renderings of A. posterior neurocranium, Weberian apparatus and proximal axial elements; B. isolated urohyal bone; and C. infraorbital series. Scale bars = 1 mm

FIGURE 5. Labeo mbimbii, n in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin

FIGURE 5. Labeo mbimbii, n. sp. Holotype (AMNH 277862, AMCC 249232) in A. lateral view, immediately postmortem; B. in preservation, lateral view; C. ventral view; and D. dorsal view. Scale bar = 1 cm.

FIGURE 2 in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin

FIGURE 2. Homologous landmarks used in geometric morphometric analyses (following Armbruster, 2012): A. lateral and B. ventral views.

FIGURE 1. A in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin

FIGURE 1. A. Longitudinal profile of the Lulua River indicating subdivision into three sections based on channel slope gradient (after Mbimbi et al., 2021). B. Lulua River basin showing collection localities of the two new species (arrows indicate type localities). C. Location of the Congo basin, Kasai, Lulua, and adjacent ecoregions.

FIGURE 4. A in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin

FIGURE 4. A. Scatterplot of PC2 against PC1 (PCA of 13 meristic counts for 120 specimens representative of 9 species). B. Scatterplot of PC2 against PC1 (PCA of 12 meristic counts for 44 specimens representative of the five species overlapping with L. manasseeae in A). C. Scatterplot of PC2 against PC1 (log-transformed matrix, 12 morphometric measurements, for 114 specimens representative of 8 species).

FIGURE 7. Labeo manasseeae, n in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin

FIGURE 7. Labeo manasseeae, n. sp. Holotype (AMNH 269110, AMCC 249240): A. immediately postmortem; B. in preservation, lateral view; C. ventral view; and D. dorsal view. Scale bar = 1 cm

FIGURE 3 in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin

FIGURE 3. Simplified phylogram of subclade K modified after Liyandja et al. (2022) showing placement of L. mbimbii, n. sp., and L. manasseeae, n. sp. (in bold).

FIGURE 9. A in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin

FIGURE 9. A. Labeo luluae, holotype (ANSP 51740). B. Labeo lugubris, holotype (AMNH 12334). Scale bars = 1 cm.

opencc-zeroJun 2023View details →

Niche suitability and spatial distribution patterns of anurans in a unique Ecoregion mosaic of Northern Pakistan

The lack of information regarding biodiversity states hampers designing and implementation conservation strategies and future targets. Northern Pakistan consists of a unique ecoregion mosaic which supports a myriad of environmental niches for anuran diversity to flourish in comparison to the deserts and xeric shrublands throughout the rest of the country. In order to study the niche suitability, overlap and distribution patterns in Pakistan, we collected observational data for nine amphibian species across several distinct ecoregions by surveying 87 randomly selected locations from 2016 to 2018 in District Rawalpindi and Islamabad Capital Territory. Our model showed that the precipitation of the warmest and coldest quarter, distance to rivers and vegetation were the greatest drivers of anuran distribution, expectedly indicating that the presence of humid forests and proximity to waterways greatly influences the habitable range of anurans in Pakistan. Sympatric overlap between species occurred at significantly higher density in tropical and subtropical coniferous forests than in other ecoregion types. We found species such as Minervarya spp., Hoplobatrachus tigerinus and Euphlyctis spp. showed preference for the lowlands in proximal, central and southern parts of the study area proximal to urban settlements, little vegetation and higher average temperatures. The toads Duttaphrynus bengalensis and D. stomaticus had scattered distributions throughout the study area with no clear preference for elevation. Sphaerotheca pashchima showed a patchy distribution in the midwestern extent of the study area as well as the foothills to the north. Microhyla nilphamariensis also showed a wide distribution throughout the study area with a preference for both lowlands and montane terrain. Endemic frogs (Nanorana vicina and Allopaa hazarensis) were observed only in locations with higher elevations, higher density of streams and lower average temperatures as compared to the other seven species sampled.

opencc-by-4.0Aug 2023View details →

Scholes African Ecoregions

Ecoregion description We separated Africa into five functionally different ecoregions in order to assist with the interpretation of Greenhouse Gas flux estimates for the Regional Carbon Cycle and Assessment Phase 2 (RECCAP2) project (https://www.globalcarbonproject.org/reccap/). For the synthesis paper (in prep), the analyses therefore included Africa as a whole and where possible separate estimates for the ecoregions. The Scholes African Ecoregion Map was delineated by regrouping and smoothing the vegetation classification of the UNESCO/AETFAT/UNSO (White's) Vegetation Map of Africa (White, 1983) in accordance with the delineations of the distributions of Mean Annual Precipitation-determined (‘stable’) and Disturbance-determined (‘unstable’) savannas in Africa by Sankaran et al. (2005). In honour of the late Prof. Robert J. Scholes (Bob), who encouraged the creation of the map, we named it the “Scholes African Ecoregion Map”. The spatial maps are available as a shapefile and as grids in netcdf format at 1° and 0.05° spatial resolution. References White, Frank; 1983; Vegetation of Africa - a descriptive memoir to accompany the Unesco/AETFAT/UNSO vegetation map of Africa; Natural Resources Research Report XX; U. N. Educational, Scientific and Cultural Organization; 7 Place de Fontenoy, 75700 Paris, France; 356 pages. Sankaran, M., Hanan, N., Scholes, R. et al. Determinants of woody cover in African savannas. Nature 438, 846–849 (2005). https://doi.org/10.1038/nature04070

opencc-zeroSep 2023View details →

Data from: Climate change alters global invasion vulnerability among ecoregions

Aim: We assess climate similarity among global freshwater and terrestrial ecoregions under historical and future climate scenarios to determine where climate change will impact the climate filter of invasion process. Location: Global. Methods: We used the Climatch algorithm to conduct a climate-match analysis to quantify the climate similarity between freshwater and terrestrial ecoregions of the world. Climate match was modelled between all freshwater and terrestrial ecoregions. The analysis was conducted under historical climates and projected climates of 2090 under three shared-socioeconomic pathways SSP2-4.5, SSP3-7.0, SSP5-8.5. Climate matches of each ecoregion were presented as mean climate match to all other ecoregions. Friedman's non-parametric rank sum two-way analysis of variance with repeated measures was used to examine differences in climate match between climate scenarios.

publicSep 2023View details →

Data from: Climate change alters global invasion vulnerability among ecoregions

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