scholarly journals A dynamic continental moisture gradient drove Amazonian bird diversification

2019 ◽  
Vol 5 (7) ◽  
pp. eaat5752 ◽  
Author(s):  
Sofia Marques Silva ◽  
A. Townsend Peterson ◽  
Lincoln Carneiro ◽  
Tibério César Tortola Burlamaqui ◽  
Camila C. Ribas ◽  
...  
Keyword(s):  
Drainage Basin ◽  
Primary Source ◽  
Moisture Gradient ◽  
Landscape Dynamics ◽  
Basin Evolution ◽  
Terra Firme ◽  
Pleistocene Climate ◽  
Diversity Gradients ◽  
Pleistocene Climate Change ◽  
East West

The Amazon is the primary source of Neotropical diversity and a nexus for discussions on processes that drive biotic diversification. Biogeographers have focused on the roles of rivers and Pleistocene climate change in explaining high rates of speciation. We combine phylogeographic and niche-based paleodistributional projections for 23 upland terra firme forest bird lineages from across the Amazon to derive a new model of regional biological diversification. We found that climate-driven refugial dynamics interact with dynamic riverine barriers to produce a dominant pattern: Older lineages in the wetter western and northern parts of the Amazon gave rise to lineages in the drier southern and eastern parts. This climate/drainage basin evolution interaction links landscape dynamics with biotic diversification and explains the east-west diversity gradients across the Amazon.

scholarly journals Late Pleistocene climate change and landscape dynamics in the Eastern Alps: the inner-alpine Unterangerberg record (Austria)

2013 ◽  
Vol 68 ◽  
pp. 17-42 ◽  
Author(s):  
Reinhard Starnberger ◽  
Ruth Drescher-Schneider ◽  
Jürgen M. Reitner ◽  
Helena Rodnight ◽  
Paula J. Reimer ◽  
...  
Keyword(s):  
Climate Change ◽  
Late Pleistocene ◽  
Eastern Alps ◽  
Landscape Dynamics ◽  
Pleistocene Climate ◽  
Pleistocene Climate Change

The effects of Pleistocene climate change on biotic differentiation in a montane songbird clade from Wallacea

2017 ◽  
Vol 114 ◽  
pp. 353-366 ◽  
Author(s):  
Nathaniel S.R. Ng ◽  
Peter R. Wilton ◽  
Dewi Malia Prawiradilaga ◽  
Ywee Chieh Tay ◽  
Mochamad Indrawan ◽  
...  
Keyword(s):  
Climate Change ◽  
Pleistocene Climate ◽  
Pleistocene Climate Change ◽  
Biotic Differentiation

Towards an elementary theory of drainage basin evolution: II. A computational evaluation

1997 ◽  
Vol 23 (8) ◽  
pp. 823-849 ◽  
Author(s):  
Terence R. Smith ◽  
George E. Merchant ◽  
Bjorn Birnir
Keyword(s):  
Drainage Basin ◽  
Elementary Theory ◽  
Basin Evolution ◽  
Computational Evaluation

scholarly journals A multidisciplinary study of ecosystem evolution through early Pleistocene climate change from the marine Arda River section, Italy

2018 ◽  
Vol 89 (2) ◽  
pp. 533-562 ◽  
Author(s):  
Gaia Crippa ◽  
Andrea Baucon ◽  
Fabrizio Felletti ◽  
Gianluca Raineri ◽  
Daniele Scarponi
Keyword(s):  
Climate Change ◽  
Integrated Approach ◽  
Early Pleistocene ◽  
Tectonic Activity ◽  
Delta Front ◽  
Multidisciplinary Study ◽  
Sedimentary Evolution ◽  
Pleistocene Climate ◽  
Pleistocene Climate Change ◽  
Uplift And Erosion

AbstractThe Arda River marine succession (Italy) is an excellent site to apply an integrated approach to paleoenvironmental reconstructions, combining the results of sedimentology, body fossil paleontology, and ichnology to unravel the sedimentary evolution of a complex marine setting in the frame of early Pleistocene climate change and tectonic activity. The succession represents a subaqueous extension of a fluvial system, originated during phases of advance of fan deltas affected by high-density flows triggered by river floods, and overlain by continental conglomerates, indicating a relative sea level fall and the establishment of a continental environment. An overall regressive trend is observed through the section, from prodelta to delta front and intertidal settings. The hydrodynamic energy and the sedimentation rate are not constant through the section, but they are influenced by hyperpycnal flows, whose sediments were mainly supplied by an increase in Apennine uplift and erosion, especially after 1.80 Ma. The Arda section documents the same evolutionary history of coeval successions in the Paleo-Adriatic region, as well as the climatic changes of the early Pleistocene. The different approaches used complement quite well one another, giving strength and robustness to the obtained results.

Isostasy amplifies relative sea-level change on continental-scale deltas

2021 ◽  
Author(s):  
Sara Morón ◽  
Mike Blum ◽  
Tristan Salles ◽  
Bruce Frederick ◽  
Rebecca Farrington ◽  
...  
Keyword(s):  
Sea Level ◽  
Drainage Basin ◽  
Sediment Accumulation ◽  
River Mouth ◽  
Feedback Mechanism ◽  
Landscape Dynamics ◽  
Passive Margin ◽  
Sea Level Changes ◽  
Isostatic Compensation ◽  
Continental Scale

<p>The nature and contribution of flexural isostatic compensation to subsidence and uplift of passive margin deltas remains poorly understood. We performed a series of simulations to investigate flexural isostatic responses to high frequency fluctuations in water and sediment load associated with climatically-driven sea-level changes. We use a parallel basin and landscape dynamics model, BADLANDS, (an acronym for BAsin anD LANdscape DynamicS) that combines erosion, sedimentation, and diffusion with flexure, where the isostatic compensation of the load is computed by flexural compensation. We model a large drainage basin that discharges to a continental margin to generate a deltaic depocenter, then prescribe synthetic and climatic-driven sea-level curves of different frequencies to assess flexural response. Results show that flexural isostatic adjustments are bidirectional over 100-1000 kyr time-scales and mirror the magnitude, frequency, and direction of sea-level fluctuations, and that isostatic adjustments play an important role in driving along-strike and cross-shelf river-mouth migration and sediment accumulation. Our findings demonstrate that climate-forced sea-level changes set up a feedback mechanism that results in self-sustaining creation of accommodation into which sediment is deposited and plays a major role in delta morphology and stratigraphic architecture.</p>

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