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7 results for “Eastern water dragons”
Data from: City life alters the gut microbiome and stable isotope profiling of the eastern water dragon (Intellagama lesueurii)
Urbanisation is one of the most significant threats to biodiversity, due to the rapid and large-scale environmental alterations it imposes on the natural landscape. It is, therefore, imperative that we understand the consequences of, and mechanisms by which, species can respond to it. In recent years, research has shown that plasticity of the gut microbiome may be an important mechanism by which animals can adapt to environmental change, yet empirical evidence of this in wild non-model species remains sparse. Using an empirical replicated study system, we show that city life alters the gut microbiome of a wild native non-model species – the eastern water dragon (Intellagama lesueurii). City dragons exhibit a more diverse gut microbiome than their native riparian counterparts and show gut microbial signatures of a high fat and plant rich diet. These results highlight the role that gut microbial plasticity plays in an animals' response to human-altered landscapes.
Selection in the city: Rapid and fine scale evolution of urban eastern water dragons
<p>Oceanic archipelagos have long been treated as a petri dish for studies of evolutionary and ecological processes. Like archipelagos, cities exhibit similar patterns and processes, such as the rapid phenotypic divergence of a species between urban and non-urban environments. However, on a local scale, cities can be highly heterogenous, where geographically close populations can experience dramatically different environmental conditions. Nevertheless, we are yet to understand the evolutionary and ecological implications for populations spread across a heterogenous cityscape. To address this, we compared neutral genetic divergence to quantitative trait divergence within three native riparian and four city park populations of an iconic urban adapter, the eastern water dragon. We demonstrated that selection is likely acting to drive divergence of snout-vent length and jaw width across native riparian populations that are geographically isolated and across city park populations that are geographically close yet isolated by urbanisation. City park populations as close as 0.9 kms exhibited signs of selection driven divergence to the same extent as native riparian populations isolated by up to 114.5 kms. These findings suggest that local adaptation may be occurring over exceptionally small geographic and temporal scales within a single metropolis, demonstrating that city parks can act as archipelagos for the study of rapid evolution.</p>
Selection in the city: Rapid and fine scale evolution of urban eastern water dragons
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Data from: City life alters the gut microbiome and stable isotope profiling of the eastern water dragon (Intellagama lesueurii)
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Data from: Predictable males and unpredictable females: repeatability of sociability in eastern water dragons
There is growing evidence for consistent among-individual variation in individual sociability (e.g., tendency to be sociable) in a number of species. However, sexes often differ in their social behaviors, as well as the selection pressures which they experience. This may translate into differences in repeatability of sociability, although this has not yet been tested. Here, we investigated whether eastern water dragons (Intellegama leseurii) exhibited evidence of consistent among-individual variation (i.e., repeatability) in 4 different measurements of sociability. Specifically, we measured sociability in 4 ways (degree, centrality, proportion of time spent being social, and number of preferences), and tested whether there was evidence for sex differences in the repeatability of these sociability measurements, or whether observed levels of repeatability could be explained by a stable social environment. Our findings provide new evidence for sex differences in social personality: we found that males were significantly repeatable in 3 of 4 sociability measurements (degree, centrality, and proportion of time spent being social), whereas females were not. Further, we found that these differences were not a result of differences in the dynamics of the social environment. We discuss our findings in the context of sexual selection, as well as sex differences in the evolutionary drivers of social behavior.
Data from: Predictable males and unpredictable females: repeatability of sociability in eastern water dragons
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Archival chromatin sequencing in eastern water dragon museum specimens
GEO Series GSE256157. Intellagama lesueurii lesueurii. 8 samples. Type: Genome binding/occupancy profiling by high throughput sequencing.
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