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6,175 results for “Composition”
FIGURES 9–12 in Composition and organization of highly speciose Empidoidea (Diptera) communities in tropical montane forests of northern Thailand
FIGURES 9–12. Spatiotemporal variation in relative abundance (A* = number of individuals. trap-1. month-1). 9, Empididae; 10, Hybotidae; 11, Dolichopodidae; 12, Empidoidea (Empididae, Hybotidae, Dolichopodidae & Brachystomatidae combined). Values of A* from 12 months sampling over six 500 m elevation zones at Doi Inthanon in 2014 were log2 transformed [as log2(1+A*)] and plotted on a grid of elevation zone (vertical axis) and months (horizontal axis) using the multiquadric gridding algorithm in PAST. Values of A* are indicated by the colour scale bars (note logarithmic scale). Data were not available for January and February at <500 m and 500–1000 m.
FIGURES 5–8 in Composition and organization of highly speciose Empidoidea (Diptera) communities in tropical montane forests of northern Thailand
FIGURES 5–8. Spatiotemporal variation in observed species richness (Sobs). 5, Empididae; 6, Hybotidae; 7, Dolichopodidae; 8, Estimated species richness (Chao1) of Empidoidea (Empididae, Hybotidae, Dolichopodidae & Brachystomatidae combined). Data from 12 months sampling over six 500 m elevation zones at Doi Inthanon in 2014 are plotted on a grid of elevation zone (vertical axis) and months (horizontal axis) using the multiquadric gridding algorithm in PAST. Values of Sobs and Chao1 are indicated by the colour scale bars. Data were not available for January and February at <500 m and 500–1000 m.
FIGURE 4 in Composition and organization of highly speciose Empidoidea (Diptera) communities in tropical montane forests of northern Thailand
FIGURE 4. Monthly variation in relative abundance, A* (number of individuals. trap-1. month-1) of Empididae, Hybotidae and Dolichopodidae at all elevations on Doi Inthanon during 2014.
FIGURES 13–14. Spatiotemporal variation. 13 in Composition and organization of highly speciose Empidoidea (Diptera) communities in tropical montane forests of northern Thailand
FIGURES 13–14. Spatiotemporal variation. 13, Berger-Parker Dominance (DBP); 14, Equitability (J) of Empidoidea (Empididae, Hybotidae, Dolichopodidae & Brachystomatidae combined) through 12 months sampling over six 500 m elevation zones at Doi Inthanon in 2014. Values of DBP and J were calculated in PAST for each month in each elevation zone and smoothed using the adjacent elevation and month algorithm (see Material & methods) before plotting on a grid of elevation zone (vertical axis) and months (horizontal axis) using the multiquadric gridding algorithm in PAST. Values of DBP and J are indicated by the colour scale bars. Data were not available for January and February at <500 m and 500–1000 m.
FIGURE 3 in Composition and organization of highly speciose Empidoidea (Diptera) communities in tropical montane forests of northern Thailand
FIGURE 3. Monthly variation in species richness (Sobs) of Empididae, Hybotidae, Brachystomatidae and Dolichopodidae at all elevations on Doi Inthanon during 2014.
FIGURE 2 in Composition and organization of highly speciose Empidoidea (Diptera) communities in tropical montane forests of northern Thailand
FIGURE 2. Variation in relative abundance, A* (number of individuals. trap-1. month-1) of Empididae, Hybotidae and Dolichopodidae across different elevation zones on Doi Inthanon. Note that A* is log10 scale. Error bars indicate standard error.
FIGURE 1 in Composition and organization of highly speciose Empidoidea (Diptera) communities in tropical montane forests of northern Thailand
FIGURE 1. Species richness in each elevation zone as percentage of total richness for each family (%Sobs) at all elevations of Empididae (open squares), Brachystomatidae (closed squares), Dolichopodidae (shaded box) and Hybotidae (plain box) on Doi Inthanon.
FIGURES 31–32 in Taxonomic composition and monophyly of the genus Magnificus (Lepidoptera Hepialoidea: Hepialidae)
FIGURES 31–32. Distribution: 31, Magnificus species distribution records. Offset symbols represent different species at the same locality; 32, Disjunct allopatry of Magnificus (red outline with blue dots) and the northern Eurasian sister group comprising Hepialus humuli—blue outline, Pharmacis—crimson outline, Triodia—yellow outline, Zenophassus schamyl—dark green outline. Distribution data for northern Eurasian genera from Grehan & Knyazev (2019).
FIGURE 23 in Taxonomic composition and monophyly of the genus Magnificus (Lepidoptera Hepialoidea: Hepialidae)
FIGURE 23. Magnificus abdominal sclerites: (a) M. regius tergite II, (MWM), photo by Nikolai Ignatev, (b) M. bouvieri holotype SII (photo by Joël Minet), (c) Magnificus sp. sternites VII-VIII, photo by Nikolai Ignatev), (d) M. bouvieri holotype sternites VII-VIII, photo by Joël Minet), (e) M. regius sternites VII-VIII, photo by Nikolai Ignatev, (f) M. regius and (g) M. roseus, photos by Ulf Buchsbaum, (h) M. bouvieri holotype abdomen, photo by Joël Minet, (i) Magnificus sp. tergosternal sclerite, (j) Magnificus regius tergosternal sclerite, photos by Nikolai Ignatev, (k) Hepialus humuli tsclerite, (l) Zenophassus schamyl tergosternal sclerite, photos by John Grehan.
FIGURES 24–29. 24–27 in Taxonomic composition and monophyly of the genus Magnificus (Lepidoptera Hepialoidea: Hepialidae)
FIGURES 24–29. 24–27, Male genitalia of some northern Eurasian Hepialidae: (a—ventral view, b—pseudotegumen posteriodorsal view, c, lateral view); 24, Hepialus humuli M153; 25, Zenophassus schamyl M134, JRGC; 26, Triodia sylvina M158, JRGC; 27, Pharmacis spp. (a, b) P. bertrandi M156 a—ventral view, b—posterio-dorsal view, (c) P. cantabricus, ventral view (photos 24–26 by John Grehan, 27a-b by Carlos Mielke, 27c by Axel Kallies); 28, Sthenopis pretiosus M179: (a) ventral, (b) lateral (apex of pseudoteguminal arm behind valva), JRGC; 29, Sternum II in some northern Eurasian and North American Hepialidae, (a) Hepialus humuli M153, (b) Zenophassus schamyl M132, (c) Triodia sylvina M158, (d) Pharmacis bertrandi M156, (e) Sthenopis pretiosus M179, (f) Sthenopis purpurascens M119. Photos by John Grehan.
FIGURE 30 in Taxonomic composition and monophyly of the genus Magnificus (Lepidoptera Hepialoidea: Hepialidae)
FIGURE 30. Magnificus FW major banding patterns (coloured outlines). Wing veins—blue lines. FW illustrations 30g, h of limited quality. Higher resolution unavailable.
FIGURES 21–22 in Taxonomic composition and monophyly of the genus Magnificus (Lepidoptera Hepialoidea: Hepialidae)
FIGURES 21–22. Magnificus thoracic appendages: 21, wing venation a, Magnificus sp. female, b, M. regius male. Diagrams by John Grehan; 22, legs: left to right – pro. meso, meta (a) Magnificus sp. female (MWM), photo by Nikolai Ignatev, (b) Magnificus regius male (ZSBS), (c) Magnificus roseus male, photos by Ulf Buchsbaum.
FIGURES 10–20. Genitalia. 10 in Taxonomic composition and monophyly of the genus Magnificus (Lepidoptera Hepialoidea: Hepialidae)
FIGURES 10–20. Genitalia. 10, Magnificus bouvieri male holotype genitalia, ventral view. Photo by Joël Minet; 11, Magnificus dirschi male holotype genitalia, ventral view. Photo by Théo Léger; 12, Magnificus regius genitalia: a, male syntype, ventral view, dissection ESN 2845(MfN). Photo by Théo Léger; b, male, ventral view (ZSBS). Photo by Ulf Buchsbaum; c, male, ventral (left) and lateral (right) (MWM). Photo by Nikolai Ignatev; 13, Magnificus roseus male genitalia, ventral view, (a) holotype (MNHN). Photo by Joël Minet, (b) (ZSBS). Photo by Ulf Buchsbaum; Fig. 16. Magnificus jiuzhiensis genitalia: (a) holotype male, ventral view (from Yan 2000); 15, 'Hepialiscus sylvina Linnaeus, 1761', male, ventral view (from Chu & Wang 1985b: fig. 31 and Zhu et al. 2004: fig. 120); 16, Magnificus jiuzhiensis, female external posterior view (from Yan 2000); 17, Magnificus miniatus female holotype external genitalia, posterior view. Photo by Dayong Xu; 18, Magnificus regius female external posterior and lateral interior view (MWM). Photo by Nikolai Ignatev; 19, Magnificus zhiduoensis female holotype external posterior view (from Yan 2000); 20, Magnificus sp. female external posterior view (MWM). Photo by Nikolai Ignatev.
FIGURES 1–9 in Taxonomic composition and monophyly of the genus Magnificus (Lepidoptera Hepialoidea: Hepialidae)
FIGURES 1–9. Adult moths: 1, Magnificus bouvieri male holotype, dorsal (MNHN); 2, M. dirschi male holotype, dorsal (MfN). Photo by Théo Léger; 3, M. miniatus female holotype, (a) dorsal, (b) ventral (IZAS). Photo by Dayong Xu; 4, M. regius: (a) female syntype (from Staudinger 1896, pl. 5, Fig. 11), (b) M. regius rubellus, male lectotype, dorsal (MfN). Photo by Théo Léger, (c) M. regius rubellus (ZSBS), Photo by Ulf Buchsbaum, (d) M. regius rubellus (MWM). Photo Nikolai Ignatev; 5, M. roseus: (a) holotype male, dorsal (MNHN). Photo by Joël Minet, (b) male, dorsal (ZSBS), Photo by Ulf Buchsbaum; 6, M. zhiduoensis female holotype, dorsal [cropped image available only] (GAAH). Photo by Dayong Xue; 7, Magnificus sp. female, dorsal (MWM). Photo by Nikolai Ignatev; 8, Hepialus humuli, female, dorsal (Moscow, Russia SKC). Photo by Svyatoslav Knyazev; 9. Zenophassus schamyl, male, dorsal (Apsheronsk environs, Caucasus, Russia SKC). Photo by Svyatoslav Knyazev.
Zheng et al-Insects-Bacterial Composition and Diversity of the Digestive Tract of Odontomachus monticola Forel and Ectomomyrmex javanus Mayr-Supplementary files
<p>Figure S1: Rarefaction curves of bacterial ASVs for all samples</p> <p>Table S1: Diversity indices of bacterial communities between the two ponerine ant species</p> <p>Table S2: Diversity indices of bacterial communities in the infrabuccal pockets and guts of workers and larvae</p> <p>Table S3: ANOSIM analysis of bacterial communities across infrabuccal pockets, guts of workers, and larvae (<em>p</em>-values).</p>
Data from: Multi-driver and multi-scale assessment of vine community structure and composition across a complex tropical environmental matrix
Ecological communities are structured by multiple processes operating at multiple scales yet understanding the scale-dependency of these processes remains an open challenge. This might be particularly true for parasites, for which biotic rather than abiotic processes may play a primary role in structuring communities. Focusing on vines, a group of structural parasites that gain access to the canopy using different climbing mechanisms, we examined the influence of abiotic factors in tandem with host-parasite and parasite-parasite interactions in the assembly of tropical vine communities. Two synthetic variables, namely Climate1 and landscape Variety, were consistently important in explaining variation in species richness and diversity, as well as species composition, but their importance varied with scale. Whereas Climate1 summarizes the largest variability among climatic variables, landscape Variety expresses landscape heterogeneity within a neighborhood. Significant patterns of species co-occurrences suggest that vine-vine interactions also contribute to vine community assembly. Our results may be critical to understand vine proliferation and help design management strategies for their control.
Data from: Pellets of proof: first glimpse of the dietary composition of adult odonates as revealed by metabarcoding of feces
Recent advances in molecular techniques allow us to resolve the diet of unstudied taxa. Odonates are potentially important top-down regulators of many insects. Yet, to date, our knowledge of odonate prey use is based mainly on limited observations of odonates catching or eating their prey. In this study, we examine the potential use of metabarcoding in establishing the diet of three adult odonate species (Lestes sponsa, Enallagma cyathigerum, and Sympetrum danae) at a site in southwestern Finland. To this purpose, we compared three different methods for extracting DNA from fecal samples: the Macherey-Nagel Nucleospin XS kit, a traditional salt extraction, and the Zymo Research Fecal Microprep kit. From these extracts, we amplified group-specific mitochondrial markers (COI and 16S rRNA) from altogether 72 odonate individuals, and compared them to comprehensive reference libraries. The three odonate species show major overlap in diet, with no significant differences between individuals of different size and/or gender, reflecting opportunistic foraging of adult odonates. Of a total of 41 different prey species detected, the most frequently consumed ones were Diptera, with additional records of six other orders. Based on our data, the best DNA extraction method is the traditional salt extraction, as it provides the most information on prey content while also being the most economical. To our knowledge, this is the first study to resolve the species-level diet of adult odonates. Armed with the appropriate methodological caveats, we are ready to examine the ecological role of odonates in both terrestrial and aquatic food webs, and in transferring subsidies between these two realms.
Data from: Mating system and genetic composition of the macaw palm (Acrocomia aculeata): implications for breeding and genetic conservation programs
Acrocomia aculeata (Arecaceae), a palm endemic to South and Central America, is a potential oil crop. Knowledge of the mating system of this species is limited to its reproductive biology and to studies using molecular markers. The present study analyzed genetic diversity between its developmental stages and determined its prevailing mating system in order to support genetic conservation and breeding programs. We tested nine microsatellite markers in 27 mother trees (adult plants) and 157 offspring (juvenile plants) from the southeastern region of Brazil. Heterozygosity levels differed between the two studied life stages, as indicated by the fixation index of adult and juvenile trees, suggesting that selection against homozygotes occurs during the plant life cycle. The mating system parameters analyzed indicate that A. aculeata is predominantly outcrossing (allogamous). However, its low levels of selfing suggest that there is individual variation with regard to self-incompatibility, which can be a survival strategy in isolated or fragmented habitats. Deviations in variance effective size were detected because of high mating rates among relatives and correlated matings. These findings indicate that the main source of inbreeding results from biparental inbreeding in the population and that the progenies are predominantly composed of full-sibs. The information provided by this study on the ecology and reproduction dynamics of A. aculeata should be useful to both breeding and genetic conservation programs, allowing the development of more precise mathematical models and the estimation of the appropriate number of mother trees for seed collection.
Data from: Host species composition influences infection severity among amphibians in the absence of spillover transmission
Wildlife epidemiological outcomes can depend strongly on the composition of an ecological community, particularly when multiple host species are affected by the same pathogen. However, the relationship between host species richness and disease risk can vary with community context and with the degree of spillover transmission that occurs among co-occurring host species. We examined the degree to which host species composition influences infection by Batrachochytrium dendrobatidis (Bd), a widespread fungal pathogen associated with amphibian population declines around the world, and whether transmission occurs from one highly susceptible host species to other co-occurring host species. By manipulating larval assemblages of three sympatric amphibian species in the laboratory, we characterized the relationship between host species richness and infection severity, whether infection mediates growth and survivorship differently across various combinations of host species, and whether Bd is transmitted from experimentally inoculated tadpoles to uninfected tadpoles. We found evidence of a dilution effect where Bd infection severity was dramatically reduced in the most susceptible of the three host species (Anaxyrus boreas). Infection also mediated survival and growth of all three host species such that the presence of multiple host species had both positive (e.g., infection reduction) and negative (e.g., mortality) effects on focal species. However, we found no evidence that Bd infection is transmitted by this species. While these results demonstrate that host species richness as well as species identity underpin infection dynamics in this system, dilution is not the product of reduced transmission via fewer infectious individuals of a susceptible host species. We discuss various mechanisms, including encounter reduction and antagonistic interactions such as competition and opportunistic cannibalism that may act in concert to mediate patterns of infection severity, growth, and mortality observed in multihost communities.
Data from: Phylogenetic signal in module composition and species connectivity in compartmentalized host-parasite networks
Across different taxa, networks of mutualistic or antagonistic interactions show consistent architecture. Most networks are modular, with modules being distinct species subsets connected mainly with each other and having few connections to other modules. We investigate the phylogenetic relatedness of species within modules and whether a phylogenetic signal is detectable in the within- and among module connectivity of species using 27 mammal-flea networks from the Palaearctic. In the 24 networks that were modular, closely-related hosts co-occurred in the same module more often than expected by chance; in contrast, this was rarely the case for parasites. The within- and among-module connectivity of the same host or parasite species varied geographically. However, among-module but not within-module connectivity of host and parasites was somewhat phylogenetically constrained. These findings suggest that the establishment of host-parasite networks results from the interplay between phylogenetic influences acting mostly on hosts and local factors acting on parasites, to create an asymmetrically constrained pattern of geographic variation in modular structure. Modularity in host-parasite networks seems to result from the shared evolutionary history of hosts and by trait convergence among unrelated parasites. This suggests profound differences between hosts and parasites in the establishment and functioning of bipartite antagonistic networks.
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