1,721,187 research outputs found
Diversification history and morphological evolution of larks
No full textEcomorphological and biogeographical data for all lark species included in the study.R code employed to conduct the analyses. Please, note that we did not incorporate in the manuscript all analyses explored in the R script; in some cases, we built similar models using different approaches and R packages (‘PANDA’, ‘DDD’, ‘laser’, ‘diversitree’) to test the consistency of our results. Thus, this is not an exhaustive set of code but serves to demonstrate the approaches employed in this study.Peer reviewe
Species delimitation based on multiple criteria: the Spotted Bush WarblerBradypterus thoracicuscomplex (Aves: Megaluridae)
No full textAlström, Per, Rasmussen, Pamela C., Olsson, Urban, Sundberg, Per (2008): Species delimitation based on multiple criteria: the Spotted Bush Warbler Bradypterus thoracicus complex (Aves: Megaluridae). Zoological Journal of the Linnean Society 154 (2): 291-307, DOI: 10.1111/j.1096-3642.2008.00418.x, URL: https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2008.00418.
Niltavinae, a new taxon of Old World flycatchers (Aves : Muscicapidae)
No full textSangster, George, Alström, Per, Forsmark, Emma, Olsson, Urban (2016): Niltavinae, a new taxon of Old World flycatchers (Aves: Muscicapidae). Zootaxa 4196 (3): 428-429, DOI: http://doi.org/10.11646/zootaxa.4196.3.
-A-new-genus-for-the-White-tailed-Flycatcher-Cyornis-concretus- (Aves:-Muscicapidae)
No full textSangster, George, Alström, Per, Gaudin, Jimmy, Olsson, Urban (2021): -A-new-genus-for-the-White-tailed-Flycatcher-Cyornis-concretus- (Aves:-Muscicapidae). Zootaxa 5072 (6): 599-600, DOI: https://doi.org/10.11646/zootaxa.5072.6.
Diversification history and morphological evolution of larks
No full textLarks (Alaudidae) constitute one of the avian families best adapted to xeric environments, having colonized a wide suite of open habitats including deserts. Although their highest diversity is in Africa, larks occur on all nonpolar continents. We tested whether larks exhibit exceptional and/or correlated shifts in the tempos of speciation and ecological trait diversification in the face of open ecological space. We employed a near-complete phylogeny and a morphological dataset including several recently recognized species. We found homogeneity in diversification dynamics across the family and evidence for a diversity‐dependent slowdown in cladogenesis, which indicates that Alaudidae may approach their ‘ecological limit’. We did not observe an early burst in phenotypic diversification, as would be expected in a ‘classic’ adaptive radiation. Our findings suggest that the morphology of larks shows a high level of evolutionary conservatism and overall lack of ecomorphological convergence: ecological variables (diet and habitat)—which by contrast display a higher lability—explain little of shape/size variation except beak shape. Both adaptation to aridity and dietary transitions have evolved independently in multiple lineages across subfamilies. This study supports the idea that continental radiations in open habitats may reach an equilibrium faster than those in tropical forests, due to differences in ecological opportunities.V.G.N. was supported by the ‘Ramón y Cajal’ programme (ref. RYC2019-026703-I) and the research project COMEVO (ref. PID2021-123304NA-I00) of the Spanish Ministry of Science and Innovation. P.A. was supported by the National Swedish Research Council (grant No. 2019-04486) and the Jornvall Foundation.Peer reviewe
Figure 2 in Species delimitation based on multiple criteria: the Spotted Bush Warbler Bradypterus thoracicus complex (Aves: Megaluridae)
No full textFigure 2. Principal components analysis of morphometric data for the members of the Bradypterus thoracicus complex. See Table 4 for summary statistics.Published as part of Alström, Per, Rasmussen, Pamela C., Olsson, Urban & Sundberg, Per, 2008, Species delimitation based on multiple criteria: the Spotted Bush Warbler Bradypterus thoracicus complex (Aves: Megaluridae), pp. 291-307 in Zoological Journal of the Linnean Society 154 (2) on page 296, DOI: 10.1111/j.1096-3642.2008.00418.x, http://zenodo.org/record/544679
Figure 1 in Morphological, vocal and genetic divergence in the Cettia acanthizoides complex (Aves: Cettiidae)
No full textFigure 1. Point map and extrapolated distributional ranges of the taxa in the Cettia acanthizoides complex. One-letter abbreviations indicate specimen localities, either studied by us or reported by museums and/or in the literature (Ludlow & Kinnear, 1944; Vaurie, 1972; Cheng, 1987; Inskipp & Inskipp, 1991; Wang et al., 1991; Rasmussen & Anderton, 2005; Spierenburg, 2005). See text for specimen locality marked 'b?'.Published as part of Alström, Per, Olsson, Urban, Rasmussen, Pamela C., Yao, Cheng-Te, Ericson, Per G. P. & Sundberg, Per, 2007, Morphological, vocal and genetic divergence in the Cettia acanthizoides complex (Aves: Cettiidae), pp. 437-452 in Zoological Journal of the Linnean Society 149 (3) on page 438, DOI: 10.1111/j.1096-3642.2007.00250.x, http://zenodo.org/record/542903
FIGURE3. Maximum-likelihood tree inferred from 998 bp of CR using a HKY+G substitution model implemented in MEGAX (Kumar et al. 2018). Bootstrap values are indicated on the nodes. in --Molecular--and--acoustic--evidence--support--the--species--status--of--Anthus rubescens rubescens and--Anthus [rubescens] japonicus--(Passeriformes:--Motacillidae)
No full textFIGURE3. Maximum-likelihood tree inferred from 998 bp of CR using a HKY+G substitution model implemented in MEGAX (Kumar et al. 2018). Bootstrap values are indicated on the nodes.Published as part of Doniol-Valcroze, Paul, Coiffard, Paul, Alström, Per, Robb, Magnus, Dufour, Paul & Crochet, Pierre-André, 2023, --Molecular--and--acoustic--evidence--support--the--species--status--of--Anthus rubescens rubescens and--Anthus [rubescens] japonicus--(Passeriformes:--Motacillidae), pp. 173-192 in Zootaxa 5343 (2) on page 180, DOI: 10.11646/zootaxa.5343.2.4, http://zenodo.org/record/832439
FIGURE5. Sonograms of various calls from Anthus [rubescens] japonicus: A) M-shaped calls (xeno-canto.org: XC267502); B) and C) common calls (xeno-canto.org: XC437043 & The Sound Approach: 02.050. MR. 01938.02) and A. r. rubescens: D and E common calls (xeno-canto.org: XC598639, XC599314). in --Molecular--and--acoustic--evidence--support--the--species--status--of--Anthus rubescens rubescens and--Anthus [rubescens] japonicus--(Passeriformes:--Motacillidae)
No full textFIGURE5. Sonograms of various calls from Anthus [rubescens] japonicus: A) M-shaped calls (xeno-canto.org: XC267502); B) and C) common calls (xeno-canto.org: XC437043 & The Sound Approach: 02.050. MR. 01938.02) and A. r. rubescens: D and E common calls (xeno-canto.org: XC598639, XC599314).Published as part of Doniol-Valcroze, Paul, Coiffard, Paul, Alström, Per, Robb, Magnus, Dufour, Paul & Crochet, Pierre-André, 2023, --Molecular--and--acoustic--evidence--support--the--species--status--of--Anthus rubescens rubescens and--Anthus [rubescens] japonicus--(Passeriformes:--Motacillidae), pp. 173-192 in Zootaxa 5343 (2) on page 183, DOI: 10.11646/zootaxa.5343.2.4, http://zenodo.org/record/832439
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