Comparative ecological dynamics of Permian-Triassic communities from the Karoo, Luangwa, and Ruhuhu Basins of southern Africa

Roopnarine, Peter D.; Angielczyk, Kenneth D.; Olroyd, Savannah L.; Nesbitt, Sterling J.; Botha‐Brink, Jennifer; Peecook, Brandon R.; Day, Michael O.; Smith, Roger M. H.

doi:10.1080/02724634.2018.1424714

Cited by 19 publications

(26 citation statements)

References 121 publications

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“…The succeeding Lystrosaurus Assemblage Zone (LAZ) has been noted for its unusually rich amphibian fauna (30,38), numerical dominance of the herbivorous therapsid Lystrosaurus (38), accelerated ontogenetic development of some tetrapods (18,19), and unusual ecological dynamics (21,32). Our results show that both variation of guild richnesses (Fig.…”

Section: Introductionmentioning

confidence: 48%

“…The general procedure for compiling the data underlying our trophic networks, or food web of interactions between species, and the construction of the networks themselves, are described in detail by Roopnarine et al (31,32) and Roopnarine and Angielczyk (34, 35), and have not been altered for the present paper. We recognized a total of 26 guilds in our paleocommunities (table S1).…”

Section: Cc-by-nc-nd 40 International License It Is Made Available Umentioning

confidence: 99%

“…The dataset presented here is a modification of our previous works on the food webs of the Permo-Triassic communities of the Karoo Basin (30)(31)(32)(33)(34)(35). We subdivided the Permian data to reflect Viglietti et al's (36, 37) subdivision Hancox et al (38) proposed an informal three-fold subdivision of the Middle Triassic Cynognathus zone, and this subdivision has been widely adopted by subsequent workers.…”

Section: Paleocommunity Datasetsmentioning

confidence: 99%

“…Tetrapod size classes overlap strongly in the guilds on which they prey if those size classes are contiguous. The range of prey size classes is based on the fact that predators can often prey on species whose maximum body sizes exceed the maximum for that predator, but whose ontogenetic and adult size variance fall within the range of expected prey (32).…”

Section: Cc-by-nc-nd 40 International License It Is Made Available Umentioning

confidence: 99%

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Stability, incumbency and ecological reorganization after the Permian-Triassic mass extinction

Roopnarine

Weik

Angielczyk

et al. 2018

Preprint

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One sentence summary: Biotic incumbency at the end of the Paleozoic, based on community functional organization, was destroyed by the Permian-Triassic mass extinction, allowing the development of novel community types.The Permian-Triassic mass extinction (PTME) altered macroevolutionary landscapes by removing incumbent biota. Here, using terrestrial paleocommunities of the Karoo Basin spanning the PTME, we show that a pre-extinction incumbent configuration of biotic interactions made significant ecological reorganizations or macroevolutionary innovations unlikely. The post-PTME ecosystem initially was more likely to be reorganized, but incumbency was re-established by the Middle Triassic. We argue that the stability of the pre-PTME ecosystem, its subsequent loss, and replacement, resulted from the influence of community-level structure and dynamics on species evolution and survival.

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Section: Introductionmentioning

confidence: 48%

Section: Cc-by-nc-nd 40 International License It Is Made Available Umentioning

confidence: 99%

Section: Paleocommunity Datasetsmentioning

confidence: 99%

Section: Cc-by-nc-nd 40 International License It Is Made Available Umentioning

confidence: 99%

See 2 more Smart Citations

Stability, incumbency and ecological reorganization after the Permian-Triassic mass extinction

Roopnarine

Weik

Angielczyk

et al. 2018

Preprint

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“…; Roopnarine et al . ). It is interesting to note that the distances separating the mid‐Permian localities around Fauresmith and Jagersfontein presented here from contemporaneous rocks in the well‐sampled southwestern corner of the basin (300–550 km) is similar to the distances separating the basins of Ruhuhu (Tanzania), Luangwa (Zambia), mid‐Zambezi (Zambia and Zimbabwe) and Metangula (Mozambique), as well as the Chiweta beds of Malawi (see Catuneanu et al .…”

Section: Discussionmentioning

confidence: 97%

Vertebrate assemblages from the north-central Main Karoo Basin, South Africa, and their implications for mid-Permian biogeography

Groenewald

Day

Rubidge

2019

LET

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The rich fossil vertebrate record from the Beaufort Group, Main Karoo Basin, provides a global standard for mid‐Permian to Mid‐Triassic continental faunas. However, recent studies have demonstrated variability in the composition of contemporaneous faunas across Gondwana. This raises the question of how much the vertebrate faunas differ within the Karoo, where the taxonomic composition of vertebrate assemblage zones (AZs) is mostly considered to be uniform. Although fossil material is known from across the outcrop of the Beaufort Group, the lowest Beaufort strata have received little attention, particularly north of S31°10′. Here, we report two fossil tetrapod assemblages from the lowest Beaufort Group in the southern Free State Province, which represent the northernmost point at which the lowest Beaufort has been targeted for collecting. The lower assemblage is characterized by an abundance of the small dicynodont Eosimops and can thus be attributed to the Tapinocephalus AZ (Guadalupian), but the absence of dinocephalian or pareiasaurian material is unlike contemporaneous assemblages found further south. This suggests that the Tapinocephalus AZ was not uniform across the entire basin and highlights that the abundance, distribution and taxonomic composition of Karoo biozones may vary more than currently appreciated. The upper assemblage, characterized by the dicynodonts Oudenodon, Aulacephalodon and Dinanomodon, is attributable to the upper Cistecephalus AZ to lower Daptocephalus AZ. The juxtaposition of the lower Tapinocephalus AZ and upper Cistecephalus\lower Daptocephalus AZ in the southern Free State implies a stratigraphic gap from the Middle to Late Permian of up to 6 million years.

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A new tusked cistecephalid dicynodont (Therapsida, Anomodontia) from the upper Permian upper Madumabisa Mudstone Formation, Luangwa Basin, Zambia

Angielczyk

Benoît

Rubidge

2019

Papers in Palaeontology

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Comparative ecological dynamics of Permian-Triassic communities from the Karoo, Luangwa, and Ruhuhu Basins of southern Africa

Cited by 19 publications

References 121 publications

Stability, incumbency and ecological reorganization after the Permian-Triassic mass extinction

Stability, incumbency and ecological reorganization after the Permian-Triassic mass extinction

Vertebrate assemblages from the north-central Main Karoo Basin, South Africa, and their implications for mid-Permian biogeography

A new tusked cistecephalid dicynodont (Therapsida, Anomodontia) from the upper Permian upper Madumabisa Mudstone Formation, Luangwa Basin, Zambia

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