The bias types and drivers of the Furongian Biodiversity Gap

Du, Minghao; Li, Haifeng; Tan, Jingqiang; Wang, Zhanghu; Wang, Wenhui

doi:10.1016/j.palaeo.2023.111394

Cited by 10 publications

(2 citation statements)

References 86 publications

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“…2019; Du et al . 2023), but emerging evidence suggests a similarly widespread pulse of originations, including the earliest cephalopods (Fang et al . 2019), planktonic graptoloids (Servais et al .…”

Section: Discussionmentioning

confidence: 99%

Ecological novelty at the start of the Cambrian and Ordovician radiations of echinoderms

Novack‐Gottshall,

Purcell,

Sultan

et al. 2024

Palaeontology

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The Cambrian and Ordovician radiations marked the origins of all major echinoderm clades and established their Phanerozoic ecological blueprint. Recent claims of modest innovation of early echinoderms and other animals suggest constraints on novelty during the origins of phyla. Here, we document the life‐habit richness, body size, tiering, habitat usage, mobility, diet and foraging habits of 366 Cambrian–Ordovician echinoderm genera across a time‐scaled phylogeny to identify the timing and impact of novelty. Most early echinoderms were sedentary, filter‐feeding microbivores, and their body sizes, diets and modes of locomotion were largely unchanged through time, despite major volatility in taxonomic composition. Cambrian echinoderms lived close to the seafloor, with stylophorans first evolving semi‐infaunality. Many Ordovician echinoderms lived farther from the seafloor, with more complex filter‐feeding organs and tiering structure, often using other organisms as substrates. Mobile carnivores and mass‐feeders emerge then, too, across diverse asterozoans and echinozoans. Most of these novelties coincide with the origins of individual clades during the early and late Cambrian (Terreneuvian/Series 2 and Furongian), and 10–20 million years pass before most become ecologically important. Life‐habit evolution within most taxa involved new variations in these traits, with crinoids and asterozoans better able to shift strategies. The Ordovician radiation records more new variability in pre‐existing Cambrian life habits rather than radical re‐invention, with important novelties (like mobile carnivory and mass‐feeding, increased height off the seafloor, and biotic substrates) becoming ecologically more impactful. Taxa with these strategies were those best able to capitalize on the newly heterogeneous Ordovician world.

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Section: Discussionmentioning

confidence: 99%

Ecological novelty at the start of the Cambrian and Ordovician radiations of echinoderms

Novack‐Gottshall,

Purcell,

Sultan

et al. 2024

Palaeontology

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“…On the surface this seems like a reasonable effect of the myriad of adverse environmental conditions discussed above. However, this is likely due to a bias in the available rock record with studies of deep marine settings being more common than those in shallow water communities (Harper et al, 2019) or bias in collection records (Du et al, 2023).…”

Section: The Furongian Biodiversity Gapmentioning

confidence: 99%

Miaolingian and Furongian environmental impacts on reef building and carbonate environments: a model for consideration

Cordie¹

2023

Preprint

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Situated between two prominent radiation events, the late Cambrian is understudied due to its lack of rock record, complex marine geochemical record, and low biodiversity. The study of reef evolution during this interval has also received less focus than surrounding intervals because of the lack of metazoan-based reefs, though microbial reefs are prevalent. However, the late Cambrian can provide valuable insights into the environmental controls on early reef development. Using fossil occurrences from the Paleobiology Database, Paleoreef Database, and a review of the primary literature, this study attempts to provide context for the conditions that may have influenced reef development in the Miaolingian and Furongian. Marine dissolved oxygen levels are the primary driver of reef diversity during this period, but ocean acidity, temperature, marine regression, nutrient load, and lack of supporting deep-water habitats may all have impacted metazoan reefs during the late Cambrian. A model is here proposed which suggests that metazoan reef abundances were low during the late Cambrian because of initial surface water anoxia that caused the extinction of metazoan reef builders in the late-early Cambrian, followed by exclusion of metazoans from reef environments due to deep water anoxia and marine regression. These inhibiting conditions were not necessarily concurrent but did collectively inhibit the growth of metazoan reefs until transgression in the Early Ordovician opened more shelf space for new reef development. This model provides a first step in exploration of these conditions during the late Cambrian and for reef development in general.

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Analysis of the environmental impacts affecting Cambrian reef building and carbonate settings during the Miaolingian and Furongian epochs: A hypothesis for consideration

Cordie

2023

Evolving Earth

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The bias types and drivers of the Furongian Biodiversity Gap

Cited by 10 publications

References 86 publications

Ecological novelty at the start of the Cambrian and Ordovician radiations of echinoderms

Ecological novelty at the start of the Cambrian and Ordovician radiations of echinoderms

Miaolingian and Furongian environmental impacts on reef building and carbonate environments: a model for consideration

Analysis of the environmental impacts affecting Cambrian reef building and carbonate settings during the Miaolingian and Furongian epochs: A hypothesis for consideration

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