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2,568 results for “niche”
Geographic distribution change and climatic niche change of Odonates in Great Britain
<p>Species are largely thought to maintain broadly static niches over time, an assumption underpinning much theoretical ecology including the implementation of ecological models to project species' current and future distributions. Here, we assess niche conservatism in odonates in Great Britain over the past six decades by simultaneously quantifying changes in species geographic distribution and evaluating temporal trends in species realised climatic niche.</p>
Data for: Biomechanical adaptations enable phoretic mite species to occupy distinct spatial niches on host burying beetles
<p>Niche theory predicts that ecologically similar species coexist by minimising interspecific competition through niche partitioning. Therefore understanding the mechanisms of niche partitioning is essential for predicting interactions and coexistence between competing organisms. Here we study two phoretic mite species, <em>Poecilochirus carabi, </em>and <em>Macrocheles nataliae</em> that coexist on the same host-burying beetle <em>Nicrophorus vespilloides </em>and use it to 'hitchhike' between reproductive sites. Field observations revealed clear spatial partitioning between species in distinct host body parts. <em>P. carabi</em> preferred the ventral side of the thorax, whereas <em>M. nataliae </em>were exclusively found ventrally at the hairy base of the abdomen. Experimental manipulations of mite density showed that each species preferred these body parts, largely regardless of the density of the other mite species on the host beetle. Force measurements indicated that this spatial distribution is mediated by biomechanical adaptations, because each mite species required more force to be removed from their preferred location on the beetle. While <em>P. carabi</em> attached with large adhesive pads to the smooth thorax cuticle, <em>M. nataliae</em> gripped abdominal setae with their chelicerae. Our results show that specialist biomechanical adaptations for attachment can mediate spatial niche partitioning among species sharing the same host.</p>
Data and code from: Predicting the fundamental thermal niche of ectotherms
<p>Climate warming is predicted to increase mean temperatures and thermal extremes on a global scale. Because their body temperature depends on the environmental temperature, ectotherms bear the full brunt of climate warming. Predicting the impact of climate warming on ectotherm diversity and distributions requires a framework that can translate temperature effects on ectotherm life history traits into population- and community-level outcomes. Here we present a mechanistic theoretical framework that can predict the fundamental thermal niche and climate envelope of ectotherm species based on how temperature affects the underlying life history traits. The advantage of this framework is two-fold. First, it can translate temperature effects on the phenotypic traits of individual organisms to population-level patterns observed in nature. Second, it can predict thermal niches and climate envelopes based solely on trait response data and hence completely independently of any population-level information. We find that the temperature at which the intrinsic growth rate is maximized exceeds the temperature at which abundance is maximized under density-dependent growth. As a result, the temperature at which a species will increase the fastest when rare is lower than the temperature at which it will recover from a perturbation the fastest when abundant. We test model predictions using data from a native-invasive interaction to identify the temperatures at which the invader can most easily invade the native's habitat, and the native species is most likely to resist the invader. The framework is sufficiently mechanistic to yield reliable predictions for individual species, and sufficiently broad to apply across a range of ectothermic taxa. This ability to predict the thermal niche before a species encounters a new thermal environment is essential to mitigating some of the major effects of climate change on ectotherm populations around the globe.</p>
Figure 5 in Variations in trophic niches of generalist predators with plant community composition as indicated by stable isotopes and fatty acids
Figure 5. Principal components analysis of the relative abundance (mol %, logit- transformed) of individual NLFAs of Trochosa ruricola using body size (small, large), flooding index (FI), plant species richness (SR), plant functional group richness (FG), presence of grasses (Gr), legumes (Leg), small herbs (SH) and tall herbs (TH) as supplementary variables.
Figure 4 in Variations in trophic niches of generalist predators with plant community composition as indicated by stable isotopes and fatty acids
Figure 4. Variations in δ15N signatures of Trochosa ruricola as affected by flooding index (P = 0.04, R2 = 0.12) and body size (small, large; P <0.01).
Figure 1 in Variations in trophic niches of generalist predators with plant community composition as indicated by stable isotopes and fatty acids
Figure 1. Variations in δ15N and δ13C signatures of Harpalus rufipes (black) and Trochosa ruricola (pink) across the study site of the Jena Experiment.
Figure 3 in Variations in trophic niches of generalist predators with plant community composition as indicated by stable isotopes and fatty acids
Figure 3. Principal components analysis of the relative abundance (mol %, logit-transformed) of individual NLFAs of Harpalus rufipes using flooding index (FI), plant species richness (SR), plant functional group richness (FG), presence of grasses (Gr), legumes (Leg), small herbs (SH) and tall herbs (TH) as supplementary variables.
Figure 6 in Variations in trophic niches of generalist predators with plant community composition as indicated by stable isotopes and fatty acids
Figure 6. Principal components analysis of the relative abundance (mol%, logit- transformed) of individual PLFAs of soil microorganisms using flooding index (FI), plant species richness (SR), plant functional group richness (FG), presence of grasses (Gr), legumes (Leg), small herbs (SH) and tall herbs (TH) as supplementary variables.
Figure 2 in Variations in trophic niches of generalist predators with plant community composition as indicated by stable isotopes and fatty acids
Figure 2. Variations in δ15N signatures of Harpalus rufipes (P <0.01, R2 = 0.11) as affected by plant species richness (log-transformed).
Fig. 2 in A closer look at the main actors of Neotropical floodplain food webs: functional classification and niche overlap of dominant benthic invertebrates in a floodplain lake of Paraná River
Fig. 2. Cluster plot depicting trophic similarity (Morisita index) among species of dominant benthic invertebrates in a floodplain lake of ParanÁ River, Argentina. Dotted line depicts the threshold similarity of 0.6.
Fig. 3 in A closer look at the main actors of Neotropical floodplain food webs: functional classification and niche overlap of dominant benthic invertebrates in a floodplain lake of Paraná River
Fig. 3. Non Metric Multidimensional scaling plot. Circles depicts taxa classified as gatherer collectors (Aulodrilus pigueti, Pristina leidyi, Dero vagus, Nais communis, Pelomus sp., Cladopelma sp., Endotribelos sp., Polypedilum sp., Chironomus sp., Parachironomus sp., Phaenopsectra sp., Americabaetis sp., Baetis sp., Campsurus violaceus, Hyalella curvispina, Crynellus sp.) [Triangles: Tanypodinae (Coelotanypus sp., Procladius sp. and Ablabesmyia (Karelia); inverted triangle: Sympetrum sp.; square: Monopelopia sp.; cross: Pomacea canaliculata].
Fig. 1 in A closer look at the main actors of Neotropical floodplain food webs: functional classification and niche overlap of dominant benthic invertebrates in a floodplain lake of Paraná River
Fig. 1. Relative importance (IRI) of food items for analyzed taxa of dominant benthic invertebrates in a floodplain lake of ParanÁ River, Argentina (parenthesis indicate sample size).
Vibroscape analysis reveals acoustic niche overlap and plastic alteration of vibratory courtship signals in ground-dwelling wolf spiders
<p>Soundscape ecology has enabled researchers to investigate natural interactions among biotic and abiotic sounds as well as their influence on local animals. To expand the scope of soundscape ecology to encompass substrate-borne vibrations (i.e. vibroscapes), we developed methods for recording and analyzing sounds produced by ground-dwelling arthropods to characterize the vibroscape of a deciduous forest floor using inexpensive contact microphone arrays followed by automated sound filtering and detection in large audio datasets. Through the collected data, we tested the hypothesis that closely related species of <em>Schizocosa</em> wolf spider partition their acoustic niche. In contrast to previous studies on acoustic niche partitioning, two closely related species - <em>S. stridulans</em> and <em>S. uetzi</em> - showed high acoustic niche overlap across space, time, and/or signal structure. Finally, we examined whether substrate-borne noise, including anthropogenic noise (e.g., airplanes) and heterospecific signals, promotes behavioral plasticity in signaling behavior to reduce the risk of signal interference. We found that all three focal <em>Schizocosa</em> species increased the dominant frequency of their vibratory courtship signals in noisier signaling environments. Also, <em>S. stridulans</em> males displayed increased vibratory signal complexity with an increased abundance of <em>S. uetzi</em>, their sister species with which they are highly overlapped in the acoustic niche.</p>
Figs 27–28 in The Phanaeus tridens species group (Coleoptera: Scarabaeoidea): a dung beetle group with genital morphological stasis but a changing ecological niche
Figs 27–28. Phanaeus victoriae Moctezuma sp. nov. 27 – holotype male; 28 – paratype female. Scale bar = 1.0 mm.
Figs 19–21. Phanaeus furiosus Bates, 1887. 19 in The Phanaeus tridens species group (Coleoptera: Scarabaeoidea): a dung beetle group with genital morphological stasis but a changing ecological niche
Figs 19–21. Phanaeus furiosus Bates, 1887. 19 – male green phase; 20 – male red phase; 21 – lectotype and labels (by Mario Cupello, UFPR). Scale bar = 1.0 mm.
Figs 16–18. Phanaeus herbeus Bates, 1887, stat. rev. 16 in The Phanaeus tridens species group (Coleoptera: Scarabaeoidea): a dung beetle group with genital morphological stasis but a changing ecological niche
Figs 16–18. Phanaeus herbeus Bates, 1887, stat. rev. 16 – male green phase; 17 – holotype and labels (by Mario Cupello, UFPR); 18 – P. tricornis Olsoufieff, 1924, junior subjective synonymy, redrawn from OLSOUFIEFF (1924). Scale bar = 1.0 mm.
Figs 10–12. Phanaeus daphnis Harold, 1863. 10 in The Phanaeus tridens species group (Coleoptera: Scarabaeoidea): a dung beetle group with genital morphological stasis but a changing ecological niche
Figs 10–12. Phanaeus daphnis Harold, 1863. 10 – male green phase; 11 – male deep blue-green phase; 12 – lectotype and labels (by Christophe Rivier, MNHN). Scale bar = 1.0 mm.
Figs 43–54 in The Phanaeus tridens species group (Coleoptera: Scarabaeoidea): a dung beetle group with genital morphological stasis but a changing ecological niche
Figs 43–54. Lateral view of pronotum of major male. 43 – P. tridens Castelnau, 1840; 44 – P. moroni Arnaud, 2001, stat. rev.; 45 – P. balthasari Arnaud, 2001; 46 – P. daphnis Harold, 1863; 47 – P. coeruleus Bates, 1887, stat. rev. (holotype, by Keita Matsumoto, BMNH); 48 – P. substriolatus Balthasar, 1939, stat. rev.; 49 – P. herbeus Bates, 1887, stat. rev. (green-red phase); 50 – P. furiosus Bates, 1887 (green phase); 51 – P. pseudofurcosus Balthasar, 1939, stat. rev.; 52 – P. nimrod Harold, 1863; 53 – P. victoriae Moctezuma sp. nov. (holotype); 54 – P. eximius Bates, 1887. Scale bar = 1.0 mm.
Fig. 64 in The Phanaeus tridens species group (Coleoptera: Scarabaeoidea): a dung beetle group with genital morphological stasis but a changing ecological niche
Fig. 64. Predicted distribution of P. tridens Castelnau, 1840, P. moroni Arnaud, 2001 and P. balthasari Arnaud, 2001. The distribution of P. coeruleus Bates, 1887 was not modelled because it is only known from a single locality that needs confirmation.
Figs 24–26. Phanaeus nimrod Harold, 1863. 24 in The Phanaeus tridens species group (Coleoptera: Scarabaeoidea): a dung beetle group with genital morphological stasis but a changing ecological niche
Figs 24–26. Phanaeus nimrod Harold, 1863. 24 – male green-red phase; 25 – lectotype and labels (by Christophe Rivier, MNHN); 26 – P. babori Balthasar, 1939, junior subjective synonymy, holotype and labels (by Jiří Hájek, NMPC). Scale bar = 1.0 mm.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
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.