Phylogeography and climatic niche evolution in live oaks (Quercus series Virentes) from the tropics to the temperate zone

2011 ◽  
Vol 38 (5) ◽  
pp. 962-981 ◽  
Author(s):  
Jeannine Cavender-Bares ◽  
Antonio Gonzalez-Rodriguez ◽  
Annette Pahlich ◽  
Kari Koehler ◽  
Nicholas Deacon
2016 ◽  
Vol 283 (1824) ◽  
pp. 20152458 ◽  
Author(s):  
Camila Gómez ◽  
Elkin A. Tenorio ◽  
Paola Montoya ◽  
Carlos Daniel Cadena

Differences in life-history traits between tropical and temperate lineages are often attributed to differences in their climatic niche dynamics. For example, the more frequent appearance of migratory behaviour in temperate-breeding species than in species originally breeding in the tropics is believed to have resulted partly from tropical climatic stability and niche conservatism constraining tropical species from shifting their ranges. However, little is known about the patterns and processes underlying climatic niche evolution in migrant and resident animals. We evaluated the evolution of overlap in climatic niches between seasons and its relationship to migratory behaviour in the Parulidae, a family of New World passerine birds. We used ordination methods to measure seasonal niche overlap and niche breadth of 54 resident and 49 migrant species and used phylogenetic comparative methods to assess patterns of climatic niche evolution. We found that despite travelling thousands of kilometres, migrants tracked climatic conditions across the year to a greater extent than tropical residents. Migrant species had wider niches than resident species, although residents as a group occupied a wider climatic space and niches of migrants and residents overlapped extensively. Neither breeding latitude nor migratory distance explained variation among species in climatic niche overlap between seasons. Our findings support the notion that tropical species have narrower niches than temperate-breeders, but does not necessarily constrain their ability to shift or expand their geographical ranges and become migratory. Overall, the tropics may have been historically less likely to experience the suite of components that generate strong selection pressures for the evolution of migratory behaviour.


2014 ◽  
Vol 13 ◽  
pp. 84-85
Author(s):  
Luis Felipe Hinojosa ◽  
Francisca Campano ◽  
Francy Carvajal ◽  
Mirta Quattrochio ◽  
María Fernanda Pérez ◽  
...  

2020 ◽  
Vol 47 (2) ◽  
pp. 123-132
Author(s):  
Israel Moreno-Contreras ◽  
Luis A. Sánchez-González ◽  
María del Coro Arizmendi ◽  
David A. Prieto-Torres ◽  
Adolfo G. Navarro-Sigüenza

2016 ◽  
Vol 17 (1) ◽  
pp. 11-28 ◽  
Author(s):  
Diego L. Salariato ◽  
Fernando O. Zuloaga

2012 ◽  
Vol 39 (12) ◽  
pp. 2201-2211 ◽  
Author(s):  
Jan Schnitzler ◽  
Catherine H. Graham ◽  
Carsten F. Dormann ◽  
Katja Schiffers ◽  
H. Peter Linder

Soil Research ◽  
1999 ◽  
Vol 37 (2) ◽  
pp. 245 ◽  
Author(s):  
Wolfgang Wilcke ◽  
Silke Müller ◽  
Nualsri Kanchanakool ◽  
Chalinee Niamskul ◽  
Wolfgang Zech

Little is known about the polychlorinated biphenyl (PCB) pollution of tropical environments, although part of the contribution to global PCB contamination originates in the tropics. The objective of this study was to compare PCB concentrations and patterns in urban soils of Bangkok with data from the temperate zone to detect indications for possible differences in sources and fate of PCBs. The sum of congeners 1, 8, 20, 28, 52, 101, 118, 138, 153, 180, 206, and 209 (=Σ12PCBs) ranged from 0·19 to 11·4 µg/kg, which was lower than values reported for urban soils in the temperate zone. On average, the hexa-chlorinated PCBs 138 (mean of Σ12 PCBs± s.d., 22·7 ± 8·1%) and 153 (19·9 ± 9·0%) were most abundant. The Bangkok soils contained higher percentages of lower chlorinated PCBs (≤ 4 Cl) and correspondingly lower percentages of higher chlorinated PCBs (>4 Cl) than soils in 3 temperate cities. The differences may be explained by different sources, a lower age of contamination and therefore lower volatilisation, or anaerobic dechlorination during water-stagnant periods. The comparison of the PCB profiles in Bangkok soils with those of widely used commercial PCB mixtures indicated that the major PCB sources of Bangkok soils were the highly chlorinated Clophen A60, Aroclor 1260, or similar mixtures dominated by hexa-chlorinated PCBs.


2010 ◽  
Vol 19 (7) ◽  
pp. 1423-1438 ◽  
Author(s):  
SABINE S. JAKOB ◽  
CHRISTOPH HEIBL ◽  
DENNIS RÖDDER ◽  
FRANK R. BLATTNER

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