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The effect of sampling density and study area size on landscape genetic inferences for the Mississippi slimy salamander (Plethodon mississippi)
<p>In the field of landscape genetics, it is largely unknown how choices regarding population sampling density and study area size impact inferences about which habitat features impede vs. facilitate gene flow. While it is commonly recommended that sampling locations be spaced no further apart than the average individual dispersal distance, for low mobility species, this could lead to a logistically challenging number of sampling locations, or a small and unrepresentative study area. We assessed the effects of sampling density and study area size on landscape genetics inferences for a dispersal-limited amphibian, the Mississippi slimy salamander (<i>Plethodon mississippi</i>), via comparative analysis of nested datasets. Microsatellite-based genetic distances among individuals were divided into three datasets representing either sparse sampling across a large study area, dense sampling across a small study area, or sparse sampling across the same small study area. These datasets were each used as a response variable in maximum likelihood population effects models that assessed the nature and strength of the relationship, if any, between each of five land use classes (i.e., potential predictor variables) and the response variable. Comparative analyses were based on the rank order of effect (i.e., strongest to weakest), sign of effect (i.e., gene flow resistance vs. facilitation), spatial scale of effect, and functional relationship with gene flow. Outcomes were interpreted within the context of five possible combinations of congruence among datasets. We found that each best-fit model associated with the three datasets had the same sign of effect for hardwood forests, manmade structures, and pine forests. However, different sampling densities led to a different inferred functional relationship between agricultural areas and gene flow. Furthermore, study area size appeared to influence the inferred scale of effect of manmade structures and sign of effect of pine forests. Taken together, our findings provided evidence for an influence of sampling density, study area size, and sampling effort upon inferences. Accordingly, in the absence of strong <i>a priori</i> information about spatial-genetic structure and species' life history traits, we recommend iterative subsampling and reanalysis of empirical datasets, coupled with continued investigation into the sensitivities of landscape genetics analyses using simulations or other controlled experimental designs. </p>
Figure 5 from: Richardson DJ, Moser WE, Hammond CI, Lazo-Wasem EA, McAllister CT, Pulis EE (2017) A new species of leech of the genus Placobdella (Hirudinida, Glossiphoniidae) from the American alligator (Alligator mississippiensis) in Mississippi, USA. ZooKeys 667: 39-49. https://doi.org/10.3897/zookeys.667.10680
Figure 5 - Dorsal surface, anal region, (note lack of papillae between anus and commencement of prominent paramedial papillae) of A Placobdella papillifera (YPM 083792) B Placobdella siddalli Richardson & Moser (YPM 083857). Scale bars: 1 mm.
Figure 4 from: Richardson DJ, Moser WE, Hammond CI, Lazo-Wasem EA, McAllister CT, Pulis EE (2017) A new species of leech of the genus Placobdella (Hirudinida, Glossiphoniidae) from the American alligator (Alligator mississippiensis) in Mississippi, USA. ZooKeys 667: 39-49. https://doi.org/10.3897/zookeys.667.10680
Figure 4 - Dorsal surface, anal region. Medial row of small but distinct papillae (indicated by arrows) lying between the anus and commencement of prominent paramedial papillae, on A Placobdella rugosa (YPM 083787) B Placobdella ornata, syntype (YPM 000256) C Placobdella ali (YPM 058254) D Placobdella multilineata (YPM 083782). Scale bars: 3 mm (A), 1 mm (B), 4 mm (C), 2 mm (D).
Figure 1 from: Richardson DJ, Moser WE, Hammond CI, Lazo-Wasem EA, McAllister CT, Pulis EE (2017) A new species of leech of the genus Placobdella (Hirudinida, Glossiphoniidae) from the American alligator (Alligator mississippiensis) in Mississippi, USA. ZooKeys 667: 39-49. https://doi.org/10.3897/zookeys.667.10680
Figure 1 - Holotype specimen of Placobdella siddalli Richardson & Moser, YPM 083857 A Dorsal surface B Ventral surface. Scale bar: 2 mm.
Figure 3 from: Richardson DJ, Moser WE, Hammond CI, Lazo-Wasem EA, McAllister CT, Pulis EE (2017) A new species of leech of the genus Placobdella (Hirudinida, Glossiphoniidae) from the American alligator (Alligator mississippiensis) in Mississippi, USA. ZooKeys 667: 39-49. https://doi.org/10.3897/zookeys.667.10680
Figure 3 - Paratype specimen of Placobdella siddalli Richardson & Moser, YPM 083876 mounted in Canada balsam, crop ceca (CC), anterior salivary gland (A), posterior salivary gland (P), proboscis (Pr). Scale bar: 2 mm.
Figure 2 from: Richardson DJ, Moser WE, Hammond CI, Lazo-Wasem EA, McAllister CT, Pulis EE (2017) A new species of leech of the genus Placobdella (Hirudinida, Glossiphoniidae) from the American alligator (Alligator mississippiensis) in Mississippi, USA. ZooKeys 667: 39-49. https://doi.org/10.3897/zookeys.667.10680
Figure 2 - Internal anatomy of Placobdella siddalli Richardson & Moser, YPM 083875. Dorsal view, anterior salivary gland (A), posterior salivary gland (P), proboscis (Pr). Scale bar: 1 mm.
Figure 6 from: Richardson DJ, Moser WE, Hammond CI, Lazo-Wasem EA, McAllister CT, Pulis EE (2017) A new species of leech of the genus Placobdella (Hirudinida, Glossiphoniidae) from the American alligator (Alligator mississippiensis) in Mississippi, USA. ZooKeys 667: 39-49. https://doi.org/10.3897/zookeys.667.10680
Figure 6 - Ventral surface of various species of Placobdella. Note the diameter of the caudal sucker relative to body length and width of individuals. A Placobdella ali (YPM 058279) B Placobdella ornata (YPM 083847) C Placobdella siddalli Richardson & Moser (YPM 083857) D Placobdella multilineata (YPM 083850) E Placobdella papillifera (YPM 083856) F Placobdella parasitica (YPM 059092) G Placobdella rugosa (YPM 056680). Scale bars: 10 mm (A, F), 2 mm (B), 3 mm (C), 5 mm (D, G), 1 mm (E).
Figure 3 from: Schafran PW, Leonard SW, Bray RD, Taylor WC, Musselman LJ (2016) Isoetes mississippiensis: A new quillwort from Mississippi, USA. PhytoKeys 74: 97-106. https://doi.org/10.3897/phytokeys.74.10380
Figure 3 - Light microscope image of megaspores of Isoetes mississippiensis from Schafran MS-07 (left) and MS-08 (right). Magnification 63×. Scale bar = 0.3 mm.
Figure 1 from: Schafran PW, Leonard SW, Bray RD, Taylor WC, Musselman LJ (2016) Isoetes mississippiensis: A new quillwort from Mississippi, USA. PhytoKeys 74: 97-106. https://doi.org/10.3897/phytokeys.74.10380
Figure 1 - SEMs of megaspores (a, b, c) and microspores (d, e, f) of Isoetes mississippiensis displaying distal (a, d), equatorial (b, e), and proximal (c, f) views. Megaspores from Schafran MS-08, microspores from Taylor 6798. Megaspore magnification 200×; microspore magnification 2000×.
Figure 4 from: Schafran PW, Leonard SW, Bray RD, Taylor WC, Musselman LJ (2016) Isoetes mississippiensis: A new quillwort from Mississippi, USA. PhytoKeys 74: 97-106. https://doi.org/10.3897/phytokeys.74.10380
Figure 4 - Map showing two localities of Isoetes mississippiensis. Inset: Map of Mississippi with detail area highlighted. Map created using ArcGIS software (Esri).
FIGURE 3 in Pinworms (Nematoda: Thelastomatoidea) from Insects Collected in Mississippi, USA, with description of a new species of Protrellus Cobb, 1920 from the Cockroach Ischnoptera deropeltiformis Brunner von Wattenwyl, 1865 (Blattaria: Ectobiidae)
FIGURE 3. Eggs in situ. A. Protrellus browni, n. sp. B. Protrellus aurifluus Chitwood, 1932.
Linked collectors and determiners for: University of Southern Mississippi Herbarium, Lichens.
Natural history specimen data linked to collectors and determiners held within, "University of Southern Mississippi Herbarium, Lichens". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/1f1c7b3a-99ee-4d00-a725-0f3f95be37c6">https://bionomia.net/dataset/1f1c7b3a-99ee-4d00-a725-0f3f95be37c6</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/1f1c7b3a-99ee-4d00-a725-0f3f95be37c6">https://gbif.org/dataset/1f1c7b3a-99ee-4d00-a725-0f3f95be37c6</a>. Formatted as a Frictionless Data package.
Figures 4-7. Morphological structures. 4 in The variegated mud-loving beetles (Coleoptera: Heteroceridae) of Mississippi and Alabama, with discussion and keys to the species occurring in the southeastern United States
Figures 4-7. Morphological structures. 4) Right antenna of Heterocerus pallidus. Borders of the eleven antennomeres are difficult to distinguish due to pubescence and have been highlighted. 5a) Hypermandibulate male of Heterocerus intermuralis. 5b) Female (generally similar to "normal" males). 6) Venter of Augyles auromicans exhibiting some taxonomically important structures. 7) Dorsal aspect of Heterocerus sandersoni exhibiting conspicuous longitudinal striations on the elytra. Scale line = 1mm.
Figures 45-53 in The variegated mud-loving beetles (Coleoptera: Heteroceridae) of Mississippi and Alabama, with discussion and keys to the species occurring in the southeastern United States
Figures 45-53. Male genitalia of southeastern species. The ventral view is shown unless otherwise stated. 45-50) Heterocerus species in the undulatus group. 45) H. undatus. 46) H. collaris. 47) H. texanus; left - ventral view, right - lateral view. 48) H. schwarzi; left - ventral view, right - lateral view. 49) H. tenuis. 50) H. selanderi. 51-53) Augyles and Tropicus species. Figures 52-53 are at roughly 2x relative scale of prior genitalia. 51) Augyles auromicans. 52) Tropicus nigrellus; left - dorsal view, center - ventral view, right - lateral view. 53) Tropicus pusillus; left - dorsal view, right - ventral view.
Figure 1 from: Cognato A (2010) Notes on Scolytus fagi Walsh, 1867 with the designation of a neotype, distribution notes and a key to Scolytus Geoffroy of America east of the Mississippi River (Coleoptera, Curculionidae, Scolytinae, Scolytini). ZooKeys 56: 35-43. https://doi.org/10.3897/zookeys.56.516
Figure 1 - Scolytus fagi a male habitus dorsal b male habitus c female habitus d male frons e female frons f male genitalia, ventral view g male genitalia, lateral view.
Adult Sleep Health in the Rural Appalachia and Mississippi Delta Region and Its Relationships With Cardiometabolic Health Disparities.
ClinicalTrials.gov study NCT06336525. IPD Sharing: YES. Countries: 1. Publications: 0.
Telemedicine for PrEP Throughout Mississippi
ClinicalTrials.gov study NCT03840382. IPD Sharing: Not stated. Countries: 1. Publications: 0.
The effect of sampling density and study area size on landscape genetic inferences for the Mississippi slimy salamander (Plethodon mississippi)
Open the record for dataset details and reuse information.
Delta-X: Land Subsidence Rate, Mississippi River Delta (MRD), Louisiana, USA
This dataset provides estimates of land subsidence rates for the Delta-X domain area within the Atchafalaya and Terrebonne basins for 2021. The study area is a portion of the Mississippi River Delta in coastal Louisiana, U.S. The total subsidence is calculated as the sum of deep and shallow vertical elevation change rates. The deep subsidence rate is based on information from the Coastal Protection and Restoration Authority (CPRA) of Louisiana, documented in the Phase-4 subsidence trend report prepared for and provided by CPRA (2022). The shallow subsidence is calculated for the Delta-X study area by interpolation of publicly available data provided by CPRA for their coast-wide estimation of shallow subsidence in the 2023 Coastal Master Plan. The total subsidence rates and the estimated uncertainty in the total subsidence rates are provided as separate files in cloud optimized GeoTIFF (COG) format at 30-m (0.0003 decimal degrees) resolution.
Export and Leaching of Carbon and Nitrogen from Mississippi River Basin, 1901-2099
This dataset provides estimates for export and leaching of dissolved inorganic carbon (DIC), dissolved organic carbon (DIC), total organic carbon (TOC), particulate organic carbon (POC), ammonium (NH4+), nitrate (NO3-), and total organic nitrogen (TON) from the Mississippi River Basin (MRB) to the Gulf of Mexico. The estimates are provided for a historical period of 1901-2014, and a future period of 2010-2099 (carbon estimates only) under two scenarios of high and low levels of population growth, economy, and energy consumption, respectively. The estimates are from the Dynamic Land Ecosystem Model 2.0 (DLEM 2.0). These data are applicable to studying how changes in multiple environmental factors (e.g., fertilizer application, land-use changes, climate variability, atmospheric CO2 and N deposition) affect the dynamics of leaching and export to the Gulf of Mexico.
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