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332 results for “Ecological niches”
Figure 3 in Ecological niche divergence between the brown recluse spiders Loxosceles laeta and L. surca (Sicariidae) in Chile
Figure 3. Maximum likelihood phylogeny of an alignment of COI and 28S sequences from Loxosceles species. The digits by each clade indicate percent bootstrap support based on 1,000 replicates. The species groups, as delineated by Gertsch (1967), are indicated by boxes enclosing clades. Continental biogeographic history is estimated using common-sense inference based on contemporary species distributions and is indicated in the figure using branch colours.
Data from: The phylogeographic history of Megistostegium (Malvaceae) in the dry, spiny thickets of southwestern Madagascar using RAD-seq data and ecological niche modeling.
<p class="MsoCommentText">The spiny thicket of southwestern Madagascar represents an extreme and ancient landscape with extraordinary levels of biodiversity and endemism. Few hypotheses exist for explaining speciation in the region and few plant studies have explored hypotheses for species diversification. Here we investigate three species in the endemic genus <i>Megistostegium </i>(Malvaceae) to evaluate phylogeographic structure and explore the roles of climate, soil and paleoclimate oscillations on population divergence and speciation throughout the region. We combine phylogenetic and phylogeographic inference of RADseq data with ecological niche modeling across space and time. Population structure is concurrent with major rivers in the region and we identify a new, potentially important biogeographic break coincident with several landscape features. Our data further suggests that niches occupied by species and populations differ substantially across their distribution. Paleodistribution modelling provide evidence that past climatic change could be responsible for the current distribution, population structure and maintenance of species in <i>Megistostegium.</i></p>
Data for: Sexual dimorphism in ichneumonine parasitic wasps (Hymenoptera: Ichneumonidae: Ichneumoninae) and the neglected influence of the ecological niche
<p>Sexual dimorphism is a ubiquitous phenomenon, but its ecological role and evolutionary significance are still poorly understood in many hyperdiverse lineages. We used geometric morphometrics to characterize and quantify sexual dimorphism in the head and mesosoma of 24 species in the wasp subfamily Ichneumoninae (Hymenoptera: Ichneumonidae). Our results show that sexual dimorphism varies substantially among species but is generally more pronounced on the head, with males occupying a noticeably smaller region of the morphospace than females. Phenotypic trajectory analyses showed a trend towards conserved trajectories in the difference between males and females, indicating that dimorphism seems to manifest as predictable shape changes across species. Species parasitizing pupae, particularly in concealed substrates, were found to have higher sexual dimorphism for the head than species parasitizing more exposed hosts such as larvae. For the mesosoma, this difference was not significant, with the degree of sexual dimorphism more influenced by phylogenetic history. We hypothesize that female head shape has adapted to the demands related to finding hosts in concealed habitats, whereas species that attack exposed or weakly concealed hosts have kept a generalized head shape in both sexes. These results highlight the importance of investigating intersex ecological differences as drivers of sexual dimorphism.</p>
Ensemble Ecological Niche Models, in 2019 and across RCP 2.6, 4.5, and 8.5 scenarios in 2050 and 2100, of 1508 European Marine Species based on Ecological Niche Models developed with Artificial Neural Networks, Maximum Entropy, Support Vector Machines, and AquaMaps at 0.5° Resolution
<p>Ensemble Ecological Niche Models, in 2019 and across RCP 2.6, 4.5, and 8.5 scenarios in 2050 and 2100, of 1508 European marine species based on Ecological Niche Models developed with (i) Artificial Neural Networks, (ii) Maximum Entropy, (iii) Support Vector Machines, and (iv) AquaMaps at 0.5° Resolution. The data report, for each 0.5° cell, how many models (from 0 to 4) overcome a model-specific decision threshold to assess species presence in the cell.</p>
FIGURE 9 in Two new Thereus species from Peru, with notes on ecological niche partitioning (Lepidoptera: Lycaenidae: Theclinae)
FIGURE 9. Type locality of Thereus tierralinda sp. nov., with the Manu Road going through Chontachaca on the North along the Cosñipata river (source: Google Earth).
FIGURES 15–19 in Two new Thereus species from Peru, with notes on ecological niche partitioning (Lepidoptera: Lycaenidae: Theclinae)
FIGURES 15–19. Male genitalia, ventral view (on right), left lateral view (at left). 15. Thereus tierralinda sp. nov. (HT, Peru, MUSM). 16. T. illex (Colombia, MNHN). 17. T. columbicola (Peru, CF). 18. T. eryssus (Brazil, CF). 19. T. vicens sp. nov. (HT, Peru, MUSM).
FIGURE 24 in Two new Thereus species from Peru, with notes on ecological niche partitioning (Lepidoptera: Lycaenidae: Theclinae)
FIGURE 24. Flight zone of T. tierralinda sp. nov. in 2019 and 2021 (higher oval) and the approximate flight zone of T. columbicola in 2017 and 2018 (lower oval) from a riverside clearing adjacent to the Tierra Linda Reserve camp (picture taken in 2021). Arrows indicate the preferred location for the observation posts.
FIGURES 20–22 in Two new Thereus species from Peru, with notes on ecological niche partitioning (Lepidoptera: Lycaenidae: Theclinae)
FIGURES 20–22. Female genitalia. Ventral view (at left), lateral view (middle), papilla analis in lateral view (at right). 20. Thereus columbicola (Peru, CF). 21. T. eryssus (Brazil, CF). 22. T. vicens sp. nov. (HT, Peru, MUSM).
FIGURES 1–8 in Two new Thereus species from Peru, with notes on ecological niche partitioning (Lepidoptera: Lycaenidae: Theclinae)
FIGURES 1–8. Adults of Thereus, dorsal view at left. 1.♁ T. tierralinda sp. nov. (HT, Peru, MUSM). 2. ♁ T. illex (Colombia, MNHN). 3. ♁ T. vicens sp. nov. (HT, Peru, MUSM). 4. ♀ T. vicens sp. nov. (Peru, FILS). 5. ♁ T. columbicola (Peru, CF). 6. ♀ T. columbicola (Peru, CF). 7. ♁ T. eryssus (Brazil, CF). 8. ♀ T. eryssus (Brazil, CF).
FIGURE 23 in Two new Thereus species from Peru, with notes on ecological niche partitioning (Lepidoptera: Lycaenidae: Theclinae)
FIGURE 23. Male eighth tergite in ventral view. Anterior border (at bottom) W-shape on Thereus tierralinda sp. nov. (left) and subrectangular on T. vicens sp. nov. (right).
Sexual dimorphism in an adaptive radiation: Does intersexual niche differentiation result in ecological character displacement?
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Data from: Ecological niche and phylogeny explain distribution of seed mass in the Central European flora
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Data from: Ecological niche modeling as a tool for prediction of the potential geographic distribution of Bacillus anthracis spores in Tanzania
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Data from: Genomic analysis of demographic history and ecological niche modeling in the endangered Sumatran Rhinoceros Dicerorhinus sumatrensis
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Data from: Ecological niche features override biological traits and taxonomic relatedness as predictors of occupancy and abundance in lake littoral macroinvertebrates
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Data from: Using data from related species to overcome spatial sampling bias and associated limitations in ecological niche modeling
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Data from: Correlation between genetic diversity and environmental suitability: taking uncertainty from ecological niche models into account
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Raw coordinates and measurements from: Like parent, like child -Ontogenetic development of claws of intertidal arthropods (Acari, Oribatida) from different ecological niches
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Data from: Linking life-history traits, ecology and niche breadth evolution in North American eriogonoids (Polygonaceae)
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Data from: Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators
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