scholarly journals Climatic shifts drove major contractions in avian latitudinal distributions throughout the Cenozoic

2019 ◽  
Vol 116 (26) ◽  
pp. 12895-12900 ◽  
Author(s):  
Erin E. Saupe ◽  
Alexander Farnsworth ◽  
Daniel J. Lunt ◽  
Navjit Sagoo ◽  
Karen V. Pham ◽  
...  
Keyword(s):  
Ecological Niche Modeling ◽  
Suitable Habitat ◽  
Coarse Scale ◽  
Climate Variable ◽  
Biogeographic History ◽  
Stem Lineage ◽  
History Of ◽  
Geographic Distributions ◽  
The Tropics ◽  
Early Cenozoic

Many higher level avian clades are restricted to Earth’s lower latitudes, leading to historical biogeographic reconstructions favoring a Gondwanan origin of crown birds and numerous deep subclades. However, several such “tropical-restricted” clades (TRCs) are represented by stem-lineage fossils well outside the ranges of their closest living relatives, often on northern continents. To assess the drivers of these geographic disjunctions, we combined ecological niche modeling, paleoclimate models, and the early Cenozoic fossil record to examine the influence of climatic change on avian geographic distributions over the last ∼56 million years. By modeling the distribution of suitable habitable area through time, we illustrate that most Paleogene fossil-bearing localities would have been suitable for occupancy by extant TRC representatives when their stem-lineage fossils were deposited. Potentially suitable habitat for these TRCs is inferred to have become progressively restricted toward the tropics throughout the Cenozoic, culminating in relatively narrow circumtropical distributions in the present day. Our results are consistent with coarse-scale niche conservatism at the clade level and support a scenario whereby climate change over geological timescales has largely dictated the geographic distributions of many major avian clades. The distinctive modern bias toward high avian diversity at tropical latitudes for most hierarchical taxonomic levels may therefore represent a relatively recent phenomenon, overprinting a complex biogeographic history of dramatic geographic range shifts driven by Earth’s changing climate, variable persistence, and intercontinental dispersal. Earth’s current climatic trajectory portends a return to a megathermal state, which may dramatically influence the geographic distributions of many range-restricted extant clades.

scholarly journals Novel insights into the historical biogeography of the streak-breasted scimitar babbler complex (Aves: Timaliidae: Pomatorhinus ruficollis complex)

2015 ◽  
Vol 61 (5) ◽  
pp. 910-921 ◽  
Author(s):  
Sushma Reddy ◽  
Árpád S. Nyári
Keyword(s):  
Ecological Niche ◽  
Ecological Niche Modeling ◽  
Southern China ◽  
Hainan Island ◽  
Central China ◽  
Integrative Approach ◽  
Suitable Habitat ◽  
Ecological Niche Models ◽  
Last Interglacial ◽  
History Of

Abstract The Streak-breasted Scimitar Babblers of the Pomatorhinus ruficollis species complex are found in most of the forested habitats across southern and eastern Asia. The diversification history of this group is obscured by high plumage variation across populations and conflicting genetic signal across loci. We combined genetic and geographic data from several recent studies to investigate how these species diversified across China using both phylogenetic and ecological niche modeling analyses. These two lines of evidence are consistent in showing that two well-sampled species, P. reconditus and P. nigrostellatus, in central and southern China respectively, likely experienced a history of isolation and expansion as suitable habitat contracted during the last interglacial and expanded in patchy extent during the glacial maximum. The genetic analysis showed that populations of P. nigrostellatus on Hainan Island are very similar to the ones in nearby mainland southern China. We recovered two well-supported clades within P. reconditus that were not geographically structured with both containing individuals from the same localities across central China. This phylogenetic result corresponded to the ecological niche models that showed expansion from refugia since the last interglacial. This study illustrates the value of using an integrative approach and detailed geographic sampling to help understand the recent diversification of birds in China.

scholarly journals Amazonia as the Origin and Diversification Area of Didelphidae (Mammalia: Metatheria), and a Review of the Fossil Record of the Clade

2021 ◽  
Author(s):  
Mariela C. Castro ◽  
Murilo J. Dahur ◽  
Gabriel S. Ferreira
Keyword(s):  
South America ◽  
Amazon Basin ◽  
Parametric Models ◽  
Isthmus Of Panama ◽  
Biogeographic History ◽  
Early Diversification ◽  
Northern Portion ◽  
History Of ◽  
Environmental Events ◽  
Fossil Records

AbstractDidelphidae is the largest New World radiation of marsupials, and is mostly represented by arboreal, small- to medium-sized taxa that inhabit tropical and/or subtropical forests. The group originated and remained isolated in South America for millions of years, until the formation of the Isthmus of Panama. In this study, we present the first reconstruction of the biogeographic history of Didelphidae including all major clades, based on parametric models and stratified analyses over time. We also compiled all the pre-Quaternary fossil records of the group, and contrasted these data to our biogeographic inferences, as well as to major environmental events that occurred in the South American Cenozoic. Our results indicate the relevance of Amazonia in the early diversification of Didelphidae, including the divergence of the major clades traditionally ranked as subfamilies and tribes. Cladogeneses in other areas started in the late Miocene, an interval of intense shifts, especially in the northern portion of Andes and Amazon Basin. Occupation of other areas continued through the Pliocene, but few were only colonized in Quaternary times. The comparison between the biogeographic inference and the fossil records highlights some further steps towards better understanding the spatiotemporal evolution of the clade. Finally, our results stress that the early history of didelphids is obscured by the lack of Paleogene fossils, which are still to be unearthed from low-latitude deposits of South America.

Evolution and biogeographic history of the Saguinus mystax group (Primates, Callithrichidae)

2021 ◽  
Vol 83 (2) ◽  
Author(s):  
Daysa Athaydes ◽  
Cayo A. R. Dias ◽  
Renato Gregorin ◽  
Fernando A. Perini
Keyword(s):  
Saguinus Mystax ◽  
Biogeographic History ◽  
History Of

Mitochondrial introgression and complex biogeographic history of the genus Picea

2015 ◽  
Vol 93 ◽  
pp. 63-76 ◽  
Author(s):  
Jin-Hua Ran ◽  
Ting-Ting Shen ◽  
Wen-Juan Liu ◽  
Pei-Pei Wang ◽  
Xiao-Quan Wang
Keyword(s):  
Biogeographic History ◽  
Mitochondrial Introgression ◽  
History Of

scholarly journals Ancestry and evolution of seasonal migration in the Parulidae

2011 ◽  
Vol 279 (1728) ◽  
pp. 610-618 ◽  
Author(s):  
Benjamin M. Winger ◽  
Irby J. Lovette ◽  
David W. Winkler
Keyword(s):  
Phylogenetic Signal ◽  
Rapid Change ◽  
Large Family ◽  
Seasonal Migration ◽  
Ancestral State ◽  
Migratory Behaviour ◽  
Wood Warbler ◽  
Wood Warblers ◽  
History Of ◽  
The Tropics

Seasonal migration in birds is known to be highly labile and subject to rapid change in response to selection, such that researchers have hypothesized that phylogenetic relationships should neither predict nor constrain the migratory behaviour of a species. Many theories on the evolution of bird migration assume a framework that extant migratory species have evolved repeatedly and relatively recently from sedentary tropical or subtropical ancestors. We performed ancestral state reconstructions of migratory behaviour using a comprehensive, well-supported phylogeny of the Parulidae (the ‘wood-warblers’), a large family of Neotropical and Nearctic migratory and sedentary songbirds, and examined the rates of gain and loss of migration throughout the Parulidae. Counter to traditional hypotheses, our results suggest that the ancestral wood-warbler was migratory and that losses of migration have been at least as prevalent as gains throughout the history of Parulidae. Therefore, extant sedentary tropical radiations in the Parulidae represent losses of latitudinal migration and colonization of the tropics from temperate regions. We also tested for phylogenetic signal in migratory behaviour, and our results indicate that although migratory behaviour is variable within some wood-warbler species and clades, phylogeny significantly predicts the migratory distance of species in the Parulidae.

Architecture Culture, Humanitarian Expertise:

2017 ◽  
Vol 76 (3) ◽  
pp. 367-384 ◽  
Author(s):  
Anooradha Iyer Siddiqi
Keyword(s):  
Professional Practice ◽  
Building Design ◽  
Joint Activity ◽  
Joint Construction ◽  
Mutual Interest ◽  
History Of ◽  
History Of Architecture ◽  
Anchor Points ◽  
The Tropics ◽  
Shared Mission

Architecture Culture, Humanitarian Expertise: From the Tropics to Shelter, 1953–93 recovers a history of architecture and humanitarianism through an examination of institutions and the development of a subfield of professional practice. Charting mutual interest between major humanitarian agencies and the architecture and planning professions, Anooradha Iyer Siddiqi maps the joint construction of expertise, tying together three sets of concerns: preoccupations with the tropics and climate as anchor points for the science and rationalization behind building design, the institutionalization of humanitarian spatial expertise in the academy and industry, and a tension between models for development and for relief. This joint activity and its discursive themes, from the “tropics” to “shelter”—whether aggrandizing or instrumentalizing the shared mission of architecture and humanitarianism—raised the stakes for architectural expertise as a driver for practice as well as history.

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