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93 results for “nematodes diversity”
Fig. 1 in SPECIFIC AND TROPHIC DIVERSITY OF SOIL NEMATODES IN FOREST ECOSYSTEMS FROM THE ZARAND MOUNTAINS
Fig. 1. - Dendrogram of cluster analysis FOR nematode communities, based on specific affinity, in the deciduous FOrests from the ZaRand Mountains.
Fig. 3 in Gastric nematode diversity between estuarine and inland freshwater populations of the American alligator (Alligator mississippiensis, daudin 1802), and the prediction of intermediate hosts
Fig. 3. Prey content species richness accumulation curves based on 1000 randomizations using Estimate 9.1.0. Data obtained from stomach flushing or necropsy of American alligators from (A) coastal or (B) inland habitats between 2008 and 2011. The black broken line (- -) represents the upper 95% confidence level, and the broken dotted broken line (- · -) represents the lower 95% confidence level of the species accumulation curve. The slow approach to the asymptote in coastal habitats suggests prey contents of sampled alligators did not capture all probable prey. The asymptote of inland alligators slowly begins to plateau, which may suggest our sampling efforts were close to capturing most of the probable prey of alligators.
Fig. 2 in Gastric nematode diversity between estuarine and inland freshwater populations of the American alligator (Alligator mississippiensis, daudin 1802), and the prediction of intermediate hosts
Fig. 2. Nematode species richness accumulation curve (A) and Coleman rarefaction curve (B) based on 1000 randomizations using Estimate 9.1.0. The black broken line (- -) represents the upper 95% confidence level, and the broken dotted broken line (- · -) represents the lower 95% confidence level of the species accumulation curve (A). Upper and lower Coleman standard deviations are represented by solid black lines (B). Data obtained from stomach flushing or necropsy of American alligators from Florida and Georgia between 2008 and 2011. The rapid approach to the asymptote suggests we captured all possible species of alligator nematodes.
Fig. 2 in Elucidating nematode diversity and prevalence in moose across a wide latitudinal gradient using DNA metabarcoding
Fig. 2. Nematode component community in winter with a) the number of nematode taxa detected at each study area and b) the number of nematode taxa shared among study areas.
Fig. 3 in Elucidating nematode diversity and prevalence in moose across a wide latitudinal gradient using DNA metabarcoding
Fig. 3. Prevalence in each study area of the six most common nematodes detected. Whiskers indicate 95% confidence intervals.
Fig. 1. A in Elucidating nematode diversity and prevalence in moose across a wide latitudinal gradient using DNA metabarcoding
Fig. 1. A map showing the distribution of the five study areas across Norway ranging from 59.6◦N to 70.5◦N.
Fig. 10 in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 10. Bar graphs showing the ratio of life stages and sexes in each sample. A- Procamallanus (Procamallanus) pseudolaeviconchus Moravec and van As, 2015. B- Paracamallanus cyathopharynx (Baylis, 1923). Prevalence of each group in each month is given in the line graphs. F = female, M = male, L = larvae, US = unknown sex.
Fig. 8 in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 8. Lateral view of isolated buccal capsules of Paracamallanus specimens, morphotypes A and B. (i). Brightfield. (ii). Epifluorescence [Filter-set 09 (Ex. 470/40)]. (iii). SEM. 1 = anterior part of posterior capsule; 2 = posterior part of posterior capsule; t = trident; ellipse = elliptical shape of capsule; rectangle = rectangular shape of capsule.
Fig. 9 in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 9. Principal Component Analyses (PCA) of Paracamallanus morphometry collected from Clarias gariepinus (Burchell, 1822). A- PCA using morphometric ratios for both males and females. B- PCA using buccal capsule ratios for both males and females. Each parasite is indicated as a dot, with the fill, shape and colour corresponding to morphotype and lineage (refer to key). F = female; M = male.
Fig. 5 in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 5. Scanning electron micrographs of male Paracamallanus cyathopharynx (Baylis, 1923) from Clarias gariepinus (Burchell, 1822). A-posterior end, ventrolateral view, arrows show precloacal papillae; Bposterior end, ventral view, solid arrow shows right spicule, dashed arrow shows pair of adcloacal papillae, double arrows show postcloacal papillae; Cisolated right spicule, ventrolateral view, arrow shows shaft; D-right spicule tip, dorsal view; E– right spicule tip, ventral view, arrow shows ventral barb; Fisolated left spicule.
Fig. 3 in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 3. Scanning electron micrographs of Procamallanus (Procamallanus) pseudolaeviconchus Moravec and van As, 2015 from Clarias gariepinus (Burchell, 1822). A-postequatorial region of female, vulva, ventral view; B- vulva, lateral view, arrows show lips; C- first-stage larva exiting vulva; D-posterior end of male, ventral view, solid arrows show pre-cloacal papillae, dashed arrows show post-cloacal papillae, circles show adcloacal papillae; D(i)- pedunculate papilla; E– isolated right spicule, lateral view, solid arrow shows shaft, dashed arrow shows spicule tip; E (i)- right spicule tip, arrow shows velum; F- posterior end of male, ventrolateral view, arrow shows right spicule; G-isolated left spicule, lateral view; G(i)- left spicule tip, arrow shows velum.
Fig. 2 in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 2. Scanning electron micrographs of Procamallanus (Procamallanus) pseudolaeviconchus Moravec and van As, 2015 from Clarias gariepinus (Burchell, 1822). A-anterior end, lateral view; B- anterior end, apical view, solid arrow shows smooth peribuccal flange, dashed arrow shows marginal elevation; Cisolated buccal capsule, lateral view, arrow shows oesophagus; D-isolated buccal capsule, apical view, solid arrows show marginal elevations; E– buccal capsule interior, apical view, dashed arrow shows narrow ring, solid arrow shows basal ring; F- microdissected buccal capsule, lateral view, dashed arrow shows narrow ring, solid arrow shows basal ring; Ganterior region, lateral view, arrow shows excretory pore; G(i)- excretory pore, lateral view; H- lateral deirid, lateral view; I- lateral deirid, apical view. a = amphid; s = submedian papilla.
Fig. 7 in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 7. Phylogram of Camallanidae based on CO1 mtDNA, with Spirocerca lupi (Rudolphi, 1809) as the outgroup. Procamallanus data and Paracamallanus lineage one (LI1) and two (LI2) from the present study are indicated in purple, orange and green, respectively. Nodal support presented for Bayesian inference and Maximum Likelihood approaches (BI/ML), with support lower than 0.75/75% excluded and support above 0.9/90% indicated by an asterisk (*).
Fig. 6 in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 6. Phylogram of Camallanidae based on 18S rDNA, with Spirocerca lupi (Rudolphi, 1809) as the outgroup. Procamallanus and Paracamallanus data from the present study are indicated in purple and orange, respectively. Nodal support presented for Bayesian inference and Maximum Likelihood approaches (BI/ML), with support lower than 0.75/75% excluded and support above 0.9/90% indicated by an asterisk (*).
Fig. 4 in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 4. Scanning electron micrographs of Paracamallanus cyathopharynx (Baylis, 1923) from Clarias gariepinus (Burchell, 1822). A-anterior end, apical view; B- anterior end, apical view, arrow shows oesophagus; C- isolated buccal capsule, lateral view, arrow shows oesophagus; C(i)- isolated buccal capsule, lateral view, double arrow shows isthmus; D-microdissected anterior buccal capsule, ventral view of longitudinal ridges. E- lateral view of deirid; F, G, G(i)- posterior end of female, apical view, digit-like processes. a = amphid; s = submedian papilla; sc = sclerotised plate; t = trident; 1 = anterior buccal capsule; 2 = anterior part of posterior buccal capsule; 3 = posterior part of buccal capsule.
Fig. 1. Maps indicating the sampling locality within South Africa. A in Camallanid nematodes from Clarias gariepinus (Burchell, 1822) in the Crocodile River, Gauteng, South Africa: Exploring diversity and divergence in an acid-mine drainage impacted environment
Fig. 1. Maps indicating the sampling locality within South Africa. A- Map of Africa. B- Map of South Africa; red square highlighting area of interest. C- Map of Crocodile River flowing from Lake Heritage (sampling site) to Hartbeespoort Dam further downstream.
Ancient diversity in host-parasite interaction genes in a model parasitic nematode
<p>Files associated with the "Ancient diversity in host-parasite interaction genes in a model parasitic nematode" manuscript. </p> <p><strong>VCF files:</strong></p> <p>HB1_vs_nxHelBake1.biallelic_noRefCall.qual.repeat_filtered.vcf.gz<br> HB2_vs_nxHelBake1.biallelic_noRefCall.qual.repeat_filtered.vcf.gz<br> HB3_vs_nxHelBake1.biallelic_noRefCall.qual.repeat_filtered.vcf.gz<br> HP1_vs_ngHelPoly1.biallelic_noRefCall.qual.repeat_filtered.vcf.gz<br> HP2_vs_ngHelPoly1.biallelic_noRefCall.qual.repeat_filtered.vcf.gz</p> <p><strong><em>H. mixtum</em> genome assemblies:</strong><br> Hm16_merged_spades_scaffolds.fa.gz<br> Hm2_merged_spades_scaffolds.fa.gz</p> <p><strong>Strongylomorph phylogeny:</strong></p> <p>Strongylomorph_phylogeny_18Jan2023_20spp_511orthos.astral.nwk.gz</p> <p><strong>Gene annotation files:</strong><br> ngHelPoly1.1.primary.final_annotations.cds.fa.gz<br> ngHelPoly1.1.primary.final_annotations.gff3.gz<br> ngHelPoly1.1.primary.final_annotations.proteins.fa.gz</p> <p>nxHelBake1.1.primary.final_annotations.cds.fa.gz<br> nxHelBake1.1.primary.final_annotations.gff3.gz<br> nxHelBake1.1.primary.final_annotations.proteins.fa.gz</p> <p><strong>Curated repeat libraries:</strong><br> ngHelPoly1.1.repeats.01062023.fa.gz<br> nxHelBake1.1.repeats.01062023.fa.gz</p> <p><strong>Assembled transcripts:</strong></p> <p>ngHelPoly1_hq_transcripts.fa.gz</p> <p>nxHelBake1_hq_transcripts.fa.gz</p>
Long-term nitrogen addition alters the community and energy channel but not diversity of soil nematodes in a subtropical forest
Summary <ol> <li>Research has indicated that increases in nitrogen (N) deposition can greatly affect ecosystem processes and functions. There is limited information about the effects of long-term N addition on soil nematodes and their functional composition, although nematodes are the most abundant multicellular animals on Earth.</li> <li>We conducted a field experiment in 2004 with four levels of N addition (0, 60, 120, and 240 kg N ha<sup>-1 </sup>yr<sup>-1</sup>) in a subtropical <i>Cunninghamia lanceolata</i> forest. Soil samples with three depths (0-20, 20-40 and 40-60 cm) were collected and the community structure, diversity and trophic groups of soil nematodes were determined in 2014.</li> <li>N addition significantly increased the abundance of bacterial- and fungal-feeding nematodes, but decreased the abundance of plant-feeding nematodes at the 0-20 cm soil layer. Accordingly, the plant parasite index and enrichment index decreased but the basal index and channel index increased, which weaken the importance of the plant-based energy channel, but enhance the importance of the fungal-based energy channel. N addition had no effects on the diversity of soil nematodes in three soil depths. Structural equation modeling analysis indicated that N loading directly changed plant-feeding (total <i>r<sup>2</sup></i>=0.42) nematodes, or indirectly affected bacterial- (<i>r<sup>2</sup></i>=0.43), fungal- (<i>r<sup>2</sup></i>=0.31) and plant-feeding nematodes via change soil nutrients, soil water content and pH.</li> <li>These findings suggest that N addition can change the community structure and energy channels soil nematodes, which would affect soil processes and food web functions in forest soils under future environmental change scenarios.</li> </ol>
Drivers of nematode diversity in forest soils across climatic zones
<p>Nematodes are the most abundant multi-cellular animals in soil, influencing key processes and functions in terrestrial ecosystems. Yet, little is known about the drivers of nematode abundance and diversity in forest soils across climatic zones. This is despite forests cover approximately 30% of the earth's land surface, provide many crucial ecosystem services but strongly vary in hydrothermal conditions and associated ecosystem properties across climatic zones. Here, we collected nematode samples from 13 forests across a latitudinal gradient. We divided this gradient in temperate, warm-temperate, and tropical climatic zones and found that across the gradient, nematode abundance and diversity were mainly influenced by soil organic carbon. However, mean annual temperature and total soil phosphorus in temperate zones, soil pH in warm-temperate zones, and mean annual precipitation in tropical zones were more important in driving nematode alpha-diversity, biomass and abundance. Additionally, nematode beta-diversity was higher in temperate than in warm-temperate and tropical zones. Together, our findings demonstrate that the drivers of nematode diversity in forested ecosystems are affected by the spatial scale and climatic conditions considered. This implies that high resolution studies are needed to accurately predict how soil functions respond if climate conditions move beyond the coping range of soil organisms.</p>
Fig. 1 in Gastric nematode diversity between estuarine and inland freshwater populations of the American alligator (Alligator mississippiensis, daudin 1802), and the prediction of intermediate hosts
Fig. 1. Collecting localities of alligators in Georgia and Florida.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.