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Ecological stasis in Spinicaudata (Crustacea, Branchiopoda)? Early Cretaceous clam shrimp of the Yixian Formation of north-east China occupied a broader realized ecological niche than extant members of the group
Hethke, Manja1,7; Fuersich, Franz T.1; Jiang, Baoyu2; Wang, Bo (王博)3,4; Chellouche, Patrick1,5; Weeks, Stephen C.6
2019-05-01
Source PublicationPALAEONTOLOGY
ISSN0031-0239
Volume62Issue:3Pages:483-513
Abstract

The palaeoecology of Spinicaudata, the dominant group of benthic invertebrates in many pre-Cenozoic freshwater environments, remains poorly understood. In analogy with extant taxa, it has been oversimplified and often reduced to shallow, temporary environments characterized by few trophic levels, implying ecological stasis from the Devonian to the Recent. We excavated 43 horizons of the Lower Cretaceous Yixian Formation (Anjiagou and Hengdaozi beds) to evaluate whether spinicaudatan ecology can be simplified to such an extent. Sedimentological evidence suggests general perennial conditions during the excavated lake interval. Based on 33226 specimen counts, we identified three arthropod-dominated macrobenthic associations and two assemblages. Response curves indicate that the spinicaudatan Eosestheria middendorfii was exceptionally tolerant to environmental gradients, followed, in decreasing order, by mayfly larvae, water boatmen and oligochaetes. Many spinicaudatan-yielding layers represent death after reproductive senescence rather than mass-mortality events. Spinicaudatan size varies significantly according to faunal association. A forward stepwise regression model suggests that growth responded to population density and diversity: lower densities and higher diversities triggered fast growth, and vice versa. The proposed strong density effect on carapace size has been corroborated by rearing experiments: as for E.middendorfii, natural log regression provided the best fit for the two extant species Eulimnadia texana and Eocyzicus argillaquus. Hence, E.middendorfii was a tolerant and morphologically variable species adapted to perennial waters and the frequent presence of higher trophic levels. Although there are rare records of extant taxa co-occurring with fish, the described Early Cretaceous environment is commonly not inhabited by extant Spinicaudata.

KeywordEcology Eosestheria Middendorfii Fossil Lagerstatte Jianshangou Member Spinicaudata Yixian Formation
DOI10.1111/pala.12412
Language英语
WOS KeywordSihetun Area ; Depositional-environments ; Conchostracans Crustacea ; Jehol-biota ; Lake ; Notostraca ; Laevicaudata ; Diversity ; Australia ; Anostraca
Funding ProjectBundesministerium fur Bildung und Forschung (BMBF)[CN11/019] ; National Natural Science Foundation of China[41572010] ; National Natural Science Foundation of China[41622201] ; National Natural Science Foundation of China[41688103] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB26000000]
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000465874700008
Funding OrganizationBundesministerium fur Bildung und Forschung (BMBF) ; National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/22332
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorHethke, Manja
Affiliation1.Univ Erlangen Nurnberg, GeoZentrum Nordbayern, Loewenichstr 28, D-91054 Erlangen, Germany
2.Nanjing Univ, Sch Earth Sci & Engn, 163 Xianlin Ave, Nanjing 210046, Jiangsu, Peoples R China
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
4.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, 39 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
5.Museum Scholerberg, Abt Geowissensch, Klaus Strick Weg 10, D-49082 Osnabruck, Germany
6.Univ Akron, Dept Biol, Akron, OH 44325 USA
7.Free Univ Berlin, Inst Geol Wissensch, Malteserstr 74-100, D-12249 Berlin, Germany
Recommended Citation
GB/T 7714
Hethke, Manja,Fuersich, Franz T.,Jiang, Baoyu,et al. Ecological stasis in Spinicaudata (Crustacea, Branchiopoda)? Early Cretaceous clam shrimp of the Yixian Formation of north-east China occupied a broader realized ecological niche than extant members of the group[J]. PALAEONTOLOGY,2019,62(3):483-513.
APA Hethke, Manja,Fuersich, Franz T.,Jiang, Baoyu,Wang, Bo ,Chellouche, Patrick,&Weeks, Stephen C..(2019).Ecological stasis in Spinicaudata (Crustacea, Branchiopoda)? Early Cretaceous clam shrimp of the Yixian Formation of north-east China occupied a broader realized ecological niche than extant members of the group.PALAEONTOLOGY,62(3),483-513.
MLA Hethke, Manja,et al."Ecological stasis in Spinicaudata (Crustacea, Branchiopoda)? Early Cretaceous clam shrimp of the Yixian Formation of north-east China occupied a broader realized ecological niche than extant members of the group".PALAEONTOLOGY 62.3(2019):483-513.
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