Rapid recovery of Patagonian plant-insect associations after the end-Cretaceous extinction

被引:75
作者
Donovan, Michael P. [1 ]
Iglesias, Ari [2 ]
Wilf, Peter [1 ]
Labandeira, Conrad C. [3 ,4 ,5 ]
Cuneo, N. Ruben [6 ]
机构
[1] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA
[2] Univ Nacl Comahue, CONICET, Inst Invest Biodiversidad & Medioambiente, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
[3] Smithsonian Inst, Natl Museum Nat Hist, Dept Paleobiol, Washington, DC 20013 USA
[4] Univ Maryland, Ecol Evolut & Systemat Program, Dept Entomol & Behav, College Pk, MD 20742 USA
[5] Capital Normal Univ, Sch Life Sci, Beijing 100048, Peoples R China
[6] Consejo Nacl Invest Cient & Tecn, Museo Paleontol Egidio Feruglio, RA-9100 Trelew, Argentina
基金
美国国家科学基金会;
关键词
SAN JORGE BASIN; MASS EXTINCTION; NEW-ZEALAND; PALEOCENE; IMPACT; ENVIRONMENTS; BOUNDARY;
D O I
10.1038/s41559-016-0012
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
The Southern Hemisphere may have provided biodiversity refugia after the Cretaceous/Palaeogene (K/Pg) mass extinction. However, few extinction and recovery studies have been conducted in the terrestrial realm using well-dated macrofossil sites that span the latest Cretaceous (late Maastrichtian) and early Palaeocene (Danian) outside western interior North America (WINA). Here, we analyse insect-feeding damage on 3,646 fossil leaves from the latest Maastrichtian and three time slices of the Danian in Chubut, Patagonia, Argentina (palaeolatitude approximately 50 degrees S). We test the southern refugial hypothesis and the broader hypothesis that the extinction and recovery of insect herbivores, a central component of terrestrial food webs, differed substantially from WINA at locations far south of the Chicxulub impact structure in Mexico. We find greater insect- damage diversity in Patagonia than in WINA during both the Maastrichtian and Danian, indicating a previously unknown insect richness. As in WINA, the total diversity of Patagonian insect damage decreased from the Cretaceous to the Palaeocene, but recovery to pre-extinction levels occurred within approximately 4 Myr compared with approximately 9 Myr in WINA. As for WINA, there is no convincing evidence for survival of any of the diverse Cretaceous leaf miners in Patagonia, indicating a severe K/Pg extinction of host-specialized insects and no refugium. However, a striking difference from WINA is that diverse, novel leaf mines are present at all Danian sites, demonstrating a considerably more rapid recovery of specialized herbivores and terrestrial food webs. Our results support the emerging idea of large-scale geographic heterogeneity in extinction and recovery from the end-Cretaceous catastrophe.
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页数:5
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