When Bergmann's rule fails: evidences of environmental selection pressures shaping phenotypic diversification in a widespread seabird

Ecography ◽  
2016 ◽  
Vol 40 (3) ◽  
pp. 365-375 ◽  
Author(s):  
Guilherme Tavares Nunes ◽  
Patrícia Luciano Mancini ◽  
Leandro Bugoni

2019 ◽  
Author(s):  
Mark C. Mainwaring ◽  
Sally E. Street

AbstractSpecies’ geographic ranges and range limits are thought to be determined by climate, and across climatic gradients the morphology of populations varies non-randomly. Ecogeographic rules seek to characterise such variation, with Bergmann’s rule positing that organisms inhabiting colder environments are typically larger-bodied than those inhabiting warmer environments. While Bergmann’s rule has been supported across a range of taxonomic groups, how organisms’ behaviour may moderate its effect remains unclear. Here we investigate whether conformity to Bergmann’s rule among birds of the Western Palearctic varies in relation to nest design and migratory behaviour, using phylogenetic comparative analyses. We test predictions using data on nest structure and location, migration, body mass, latitudinal distribution, annual mean temperature and phylogenetic relatedness for a sample of >500 species. We find that conformity to Bergmann’s rule depends strongly on migratory behaviour: non-migratory species breeding at colder, more northerly latitudes are larger-bodied, while body mass is unaffected by climate in short- and long-distance migrants. Among non-migratory species, conformity to Bergmann’s rule depends, further, on nest design: species with more open nests, who are thus most exposed to adverse climatic conditions while breeding, conform most strongly to Bergmann’s rule. Our findings suggest that enclosed nesting and migration allow smaller bodied species to breed in colder environments than their body size would otherwise allow. Therefore, we conclude that organisms’ behaviour can strongly affect exposure to environmental selection pressures.



2005 ◽  
Vol 32 (10) ◽  
pp. 1827-1833 ◽  
Author(s):  
Jason Jones ◽  
Christine E. Gibb ◽  
Susanne C. Millard ◽  
Jennifer J. Barg ◽  
M. Katharine Girvan ◽  
...  




Ecography ◽  
2021 ◽  
Author(s):  
Max D. Campbell ◽  
David S. Schoeman ◽  
William Venables ◽  
Rana Abu‐Alhaija ◽  
Sonia D. Batten ◽  
...  


2015 ◽  
Vol 7 (3) ◽  
pp. 750-767 ◽  
Author(s):  
Juan J. Pierella Karlusich ◽  
Romina D. Ceccoli ◽  
Martín Graña ◽  
Héctor Romero ◽  
Néstor Carrillo


2010 ◽  
Vol 27 (12) ◽  
pp. 939-945 ◽  
Author(s):  
Takuya Oishi ◽  
Kohji Uraguchi ◽  
Alexei V. Abramov ◽  
Ryuichi Masuda


2018 ◽  
Vol 44 (2) ◽  
pp. 249-254 ◽  
Author(s):  
Susana Pallarés ◽  
Michele Lai ◽  
Pedro Abellán ◽  
Ignacio Ribera ◽  
David Sánchez-Fernández


2019 ◽  
Author(s):  
Vikram E. Chhatre ◽  
Karl C. Fetter ◽  
Andrew V. Gougherty ◽  
Matthew C. Fitzpatrick ◽  
Raju Y. Soolanayakanahally ◽  
...  

AbstractWithin a species’ range, intraspecific diversity in the form of adaptive standing genetic variation (SGV) may be non-randomly clustered into different geographic regions, reflecting the combined effects of historical range movements and spatially-varying natural selection. As a consequence of a patchy distribution of adaptive SGV, populations in different parts of the range are likely to vary in their capacity to respond to changing selection pressures, especially long-lived sessile organisms like forest trees. However, the spatial distribution of adaptive SGV across the landscape is rarely considered when predicting species responses to environmental change. Here, we use a landscape genomics approach to estimate the distribution of adaptive SGV along spatial gradients reflecting the expansion history and contemporary climatic niche of balsam poplar, Populus balsamifera (Salicaceae), a widely distributed forest tree with a transcontinental distribution in North America. By scanning the genome for signatures of spatially varying local adaptation, we estimated how adaptive SGV has been shaped by geographic distance from the rear range edge (expansion history) versus proximity to the current center of the climatic niche (environmental selection). We found that adaptive SGV was strongly structured by the current climatic niche, with surprisingly little importance attributable to historical effects such as migration out of southern refugia. As expected, the effect of the climatic niche on SGV was strong for genes whose expression is responsive to abiotic stress (drought), although genes upregulated under biotic (wounding) stress also contained SGV that followed climatic and latitudinal gradients. The latter result could reflect parallel selection pressures, or co-regulation of functional pathways involved in both abiotic and biotic stress responses. Our study in balsam poplar suggests that clustering of locally adaptive SGV within ranges primarily reflects spatial proximity within the contemporary climatic niche – an important consideration for the design of effective strategies for biodiversity conservation and avoidance of maladaptation under climate change.



Evolution ◽  
2004 ◽  
Vol 58 (8) ◽  
pp. 1674 ◽  
Author(s):  
Alan de Queiroz ◽  
Kyle G. Ashton


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