Deep drilling reveals massive shifts in evolutionary dynamics after formation of ancient ecosystem.
Deep drilling reveals massive shifts in evolutionary dynamics after formation of ancient ecosystem.
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DOI:
10.1126/sciadv.abb2943
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发表时间:
2020-09
期刊:
影响因子:
13.6
通讯作者:
Wagner B
中科院分区:
文献类型:
--
作者:
Wilke T;Hauffe T;Jovanovska E;Cvetkoska A;Donders T;Ekschmitt K;Francke A;Lacey JH;Levkov Z;Marshall CR;Neubauer TA;Silvestro D;Stelbrink B;Vogel H;Albrecht C;Holtvoeth J;Krastel S;Leicher N;Leng MJ;Lindhorst K;Masi A;Ognjanova-Rumenova N;Panagiotopoulos K;Reed JM;Sadori L;Tofilovska S;Van Bocxlaer B;Wagner-Cremer F;Wesselingh FP;Wolters V;Zanchetta G;Zhang X;Wagner B
A volatile assemblage of short-lived endemic species developed into a stable community of long-lived species in Lake Ohrid. The scarcity of high-resolution empirical data directly tracking diversity over time limits our understanding of speciation and extinction dynamics and the drivers of rate changes. Here, we analyze a continuous species-level fossil record of endemic diatoms from ancient Lake Ohrid, along with environmental and climate indicator time series since lake formation 1.36 million years (Ma) ago. We show that speciation and extinction rates nearly simultaneously decreased in the environmentally dynamic phase after ecosystem formation and stabilized after deep-water conditions established in Lake Ohrid. As the lake deepens, we also see a switch in the macroevolutionary trade-off, resulting in a transition from a volatile assemblage of short-lived endemic species to a stable community of long-lived species. Our results emphasize the importance of the interplay between environmental/climate change, ecosystem stability, and environmental limits to diversity for diversification processes. The study also provides a new understanding of evolutionary dynamics in long-lived ecosystems.
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