Contextualized niche shifts upon independent invasions by the dung beetle Onthophagus taurus

Silva, Daniel P.; Vilela, Bruno; Buzatto, Bruno A.; Moczek, Armin P.; Hortal, Joaquín

doi:10.1007/s10530-016-1204-4

Cited by 55 publications

(96 citation statements)

References 64 publications

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“…Warren, Price, Graham, Forstenhaeusler, & VanDerWal, ; Warren et al, ), but can also be used to directly extract environmental variables at species’ locations to draw macroecological inferences (e.g. Savage & Vellend, ; Silva, Vilela, Buzatto, Moczek, & Hortal, ).…”

Section: Introductionmentioning

confidence: 99%

High correlation between species‐level environmental data estimates extracted from IUCN expert range maps and from GBIF occurrence data

Alhajeri

Fourcade

2019

Journal of Biogeography

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Aim The International Union for Conservation of Nature (IUCN) expert range maps and the Global Biodiversity Information Facility (GBIF) species occurrence data are commonly used to estimate species’ geographic range. Macroecological studies often cross‐reference geographic range data with a climate dataset, to extract the mean environmental conditions encountered by a species within its geographic range. We aimed to assess the consistency of the environmental data estimates derived from IUCN versus GBIF geographic range data, and to test whether such differences may affect estimates of ecogeographical relationships, such as Bergmann's rule. Location Worldwide. Time period Around 2000. Taxa Rodents (Rodentia). Methods We first assessed the correlation between environmental data estimates (19 bioclimatic variables and elevation) derived from IUCN versus GBIF geographic range data of 1,315 rodent species, comparing how range size, conservation status, habitat, zoogeographic realm or elevation changed these correlations. Then, we compared the association between body mass and climate (mean temperature and precipitation) when the latter are derived from IUCN or GBIF data. Results There was high correlation between environmental data estimates derived from IUCN versus GBIF data, especially when excluding GBIF occurrences outside of IUCN polygons. Species’ characteristics, or using the mean or median, did not change the consistency between estimates. Overall, GBIF occurrence data and IUCN range maps produced similar patterns of body mass—climate correlations. Main conclusions At the large spatial and taxonomic scale employed in this study, there does not seem to be any considerable differences in the average environmental data estimates derived from IUCN versus GBIF geographic range data. This result indicates that both sources of geographic range data could be used independently or in concert for macroecological inferences that involve summarizing species’ niches by a single estimate of the average of their used environments.

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Section: Introductionmentioning

confidence: 99%

High correlation between species‐level environmental data estimates extracted from IUCN expert range maps and from GBIF occurrence data

Alhajeri

Fourcade

2019

Journal of Biogeography

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“…The exotic populations have become established and expanded their range across both continents (Silva et al. ), and Western Australian populations, in particular, have grown explosively, and can reach exceptionally high densities in the field–‐sometimes exceeding 5000 adults per dung pad (Hunt et al. ).…”

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confidence: 99%

Population density mediates the interaction between pre‐ and postmating sexual selection

2018

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When females mate with more than one male, sexual selection acts both before and after mating. The interaction between pre- and postmating episodes of selection is expected to be context dependent, but few studies have investigated how total sexual selection changes under different ecological conditions. We examined how population density mediates the interaction between pre- and postmating sexual selection by establishing replicate populations of the horned dung beetle Onthophagus taurus at low, medium, and high densities, and then using microsatellite-based parentage analyses to measure male fitness. We found that mating success and fertilization success were positively correlated at all three densities, but the strength of the correlation decreased with increasing density. We also found a shift from negative to positive linear selection on testes mass as density increased, and opposing selection on weapons and testes at high densities. These patterns suggest that the importance of postmating processes increases with increasing population density, which reduces the selective advantage of weapons for premating contest competition, and increases the selective advantage of large ejaculates for postmating sperm competition. We expect that density-dependent selection on testes mass has contributed to the phenotypic variation observed between natural populations of O. taurus that differ in density.

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“…While originally restricted to its native Mediterranean distribution, in the 1970s this species was introduced to Eastern and Western Australia to help control cow dung and dung-breeding flies (Tyndale-Biscoe, 1996) as well as to the Eastern United States by accident (Fincher & Woodruff, 1975). This differentiation has likely been the product of differential adaptations to local dung beetle densities (very high in Western Australia, low in the Eastern US) and the resulting divergent intensity of mate and resource competition (Moczek, 2003; Figure 2a), as well as an expansion of the Eastern US population into a colder and more humid climatic niche (Silva, Vilela, Buzatto, Moczek, & Hortal, 2016). This differentiation has likely been the product of differential adaptations to local dung beetle densities (very high in Western Australia, low in the Eastern US) and the resulting divergent intensity of mate and resource competition (Moczek, 2003; Figure 2a), as well as an expansion of the Eastern US population into a colder and more humid climatic niche (Silva, Vilela, Buzatto, Moczek, & Hortal, 2016).…”

Section: Through Developmental Plasticitymentioning

confidence: 99%

“…As discussed above, diverse Onthophagus species have been introduced around the world, and some of these introductions, such as that of O. taurus into the Eastern United States, have resulted in remarkable climatic niche expansions (Silva et al, 2016). It is clear, for instance, that both processes are capable of biasing the nature of phenotypic variation that results from ontogeny, that they lend resilience to development in the presence of ecological challenges, and that their effects are evolvable at the level of populations and species.…”

Section: Figure 3 Continuedmentioning

confidence: 99%

Developmental bias in horned dung beetles and its contributions to innovation, adaptation, and resilience

Linz

Parker

et al. 2019

Evolution and Development

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Contextualized niche shifts upon independent invasions by the dung beetle Onthophagus taurus

Cited by 55 publications

References 64 publications

High correlation between species‐level environmental data estimates extracted from IUCN expert range maps and from GBIF occurrence data

High correlation between species‐level environmental data estimates extracted from IUCN expert range maps and from GBIF occurrence data

Population density mediates the interaction between pre‐ and postmating sexual selection

Developmental bias in horned dung beetles and its contributions to innovation, adaptation, and resilience

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