Tempo and mode in the replacement of trilobite evolutionary faunas from the Cordillera Oriental basin (Northwestern Argentina)

Arcerito, Facundo René Meroi; Halpern, Karen; Balseiro, Diego; Waisfeld, Beatriz G.

doi:10.1016/j.crpv.2017.09.001

Cited by 7 publications

(12 citation statements)

References 35 publications

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“…Marengo ; Balseiro & Waisfeld ; Waisfeld & Balseiro ; Meroi Arcerito et al . ); G/S: generic richness vs. specific richness; α : Fisher's alpha diversity.…”

Section: Methodsmentioning

confidence: 99%

“…; Waisfeld & Balseiro ; Albanesi & Ortega ; Muñoz & Benedetto ; Meroi Arcerito et al . ; Tortello et al . , among others).…”

Section: Geological Settingunclassified

“…A wealth of palaeontological information, including the biostratigraphical context, systematics of different invertebrate groups, and palaeobiogeographical and palaeoecological analyses, is available from ostracod-bearing units (e.g. Benedetto 2003;Benedetto et al 2009Salas 2011;Balseiro & Waisfeld 2014;Cichowolski et al 2014;Benedetto & Muñoz 2015Toro et al 2015;Waisfeld & Balseiro 2016;Albanesi & Ortega 2016;Muñoz & Benedetto 2016;Meroi Arcerito et al 2017;Tortello et al 2016, among others).…”

Section: Geological Settingmentioning

confidence: 99%

“…O/T: the number of samples with ostracods vs. the total number of samples derived from systematic collections made for palaeoecological/taphonomic studies in the basin (e.g. Marengo 2011;Balseiro & Waisfeld 2014;Waisfeld & Balseiro 2016;Meroi Arcerito et al 2017); G/S: generic richness vs. specific richness; a: Fisher's alpha diversity.…”

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confidence: 99%

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Radiation, diversity and environmental expansion of Early Ordovician ostracods: a view from the Southern Hemisphere

Salas

Waisfeld

Muñoz

2019

LET

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Tremadocian–Floian siliciclastic successions in the Argentine Cordillera Oriental are of great interest for the study of early ostracod radiation. Four genera and five species of ostracods have so far been documented in the basin from the Early–Late Tremadocian (Tr2). This contrasts with occurrences from other palaeocontinental areas, where typically only one species is described. Patterns of environmental distribution and ecological approaches of ostracod assemblages were analysed on the basis of richness, Fisher's alpha diversity, relative abundance and occupancy. Ecological patterns remained stable throughout the studied interval, mostly with one genus notably dominant over the others. At the regional scale, dominant taxa occur at a relatively large number of sites, which display high occupancy. The literature data on carbonate successions from the Baltoscandian basin show a similar pattern, with a single taxon dominant over the others in local assemblages and wide regional distribution of these dominants. This ecological pattern would therefore have persisted at least until the Dapingian, independently of the sedimentary regime. Ostracods were already present along the onshore–offshore gradient during the initial stages of radiation, showing a strong preference for deep subtidal settings during Tr2 and then spreading to shallower environments in Tr3 and to deeper ones in the Floian (Fl2–Fl3). A compilation of ostracod diversity data from several regions shows a remarkable increase during the Darriwilian. Based on the regions studied herein, this rise in diversity is decoupled from the environmental expansion of ostracods, as they were already recorded along the onshore–offshore profile early in their history on both siliciclastic and carbonate shelves. The Argentine Cordillera Oriental could be considered as a cradle of diversity, with an important role in the subsequent radiation of the group.

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“…Marengo ; Balseiro & Waisfeld ; Waisfeld & Balseiro ; Meroi Arcerito et al . ); G/S: generic richness vs. specific richness; α : Fisher's alpha diversity.…”

Section: Methodsmentioning

confidence: 99%

“…; Waisfeld & Balseiro ; Albanesi & Ortega ; Muñoz & Benedetto ; Meroi Arcerito et al . ; Tortello et al . , among others).…”

Section: Geological Settingunclassified

Section: Geological Settingmentioning

confidence: 99%

mentioning

confidence: 99%

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Radiation, diversity and environmental expansion of Early Ordovician ostracods: a view from the Southern Hemisphere

Salas

Waisfeld

Muñoz

2019

LET

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“…, b; Balseiro & Waisfeld ; Waisfeld & Balseiro ; Meroi Arcerito et al . , ), and compiled from the literature (Harrington & Leanza ; Tortello et al . ; Tortello & Rao ; Zeballo & Tortello ; Esteban & Tortello ; Tortello & Esteban , ) (Serra et al .…”

Section: Methodsmentioning

confidence: 99%

Diversity patterns in upper Cambrian to Lower Ordovician trilobite communities of north‐western Argentina

2019

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The hierarchical structure of biodiversity from a regional scale analysis has received much attention as an alternative approach to unravelling the principal drivers of biodiversification. To better understand the processes that control the diversification of Cambro‐Ordovician trilobite communities from the Argentine Cordillera Oriental, we explore patterns of occupancy and diversity trajectories at the local and regional scales through seven intervals (Furongian, loTr1, upTr1, loTr2, upTr2, Tr3 and Fl2–3), and across an onshore‐offshore profile. Our results indicate: (1) a decrease in regional diversity from the upper Tr2 onwards, mainly caused by a reduction in the number of rare taxa, coupled with stable beta diversity at regional scale and a constant rise in beta diversity in deep subtidal environments; (2) a higher proportion of regional diversity allocated to the within‐habitat beta component; and (3) that changes in gamma diversity are driven primarily by changes in alpha diversity during the Furongian–Tr3, whereas in the Floian, beta diversity seems to modulate regional diversity. These trends and associated patterns indicate increasing ecological differences among taxa, shifting from metacommunities where most taxa have similar ecological preferences or ‘Hubbell type’ to metacommunities with high niche differentiation or ‘Hutchinson type’. Interestingly, the timing of this shift coincides with the regional‐scale turnover between trilobite evolutionary faunas suggesting that the rise in niche differentiation among these genera may be related to the transition. Superimposed on this general trend, particular diversity structures can be understood in the light of metacommunity dynamics, such as dispersal limitation and mass effect.

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Morphospace trends underlying a global turnover: Ecological dynamics of trilobite assemblages at the onset of the Ordovician Radiation

Serra

Balseiro

Waisfeld

2023

Palaeogeography, Palaeoclimatology, Palaeoecology

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Tempo and mode in the replacement of trilobite evolutionary faunas from the Cordillera Oriental basin (Northwestern Argentina)

Cited by 7 publications

References 35 publications

Radiation, diversity and environmental expansion of Early Ordovician ostracods: a view from the Southern Hemisphere

Radiation, diversity and environmental expansion of Early Ordovician ostracods: a view from the Southern Hemisphere

Diversity patterns in upper Cambrian to Lower Ordovician trilobite communities of north‐western Argentina

Morphospace trends underlying a global turnover: Ecological dynamics of trilobite assemblages at the onset of the Ordovician Radiation

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