Diversification Patterns of Lanternfishes Reveal Multiple Rate Shifts in a Critical Mesopelagic Clade Targeted for Human Exploitation.
| Autor: | Denton JSS; Department of Vertebrate Paleontology, American Museum of Natural History, Central Park West @ 79th Street, New York, NY 10024, USA. Electronic address: jdenton@amnh.org. |
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| Jazyk: | angličtina |
| Zdroj: | Current biology : CB [Curr Biol] 2018 Mar 19; Vol. 28 (6), pp. 933-940.e4. Date of Electronic Publication: 2018 Mar 08. |
| DOI: | 10.1016/j.cub.2018.01.082 |
| Abstrakt: | The mesopelagic (midwater) and deep-sea environments together comprise over 90% of the volume of the world ocean [1] and provide services that are only recently becoming recognized [2]. One of the most significant of these services relates to midwater fish biomass, recently estimated to be two orders of magnitude larger than the current worldwide fisheries catch [3, 4]. Calls to exploit midwater fish biomass have increased despite warnings about the unknown recovery potential of such organisms [2] and despite existing data suggesting that deep-sea fishes could be classified as endangered [5]. Here, to provide a null model for the respondability of midwater fishes, I use lanternfishes-which comprise the majority of worldwide midwater fish biomass [6]-to examine the diversification response of a critical midwater clade to oceanic changes over evolutionary timescales, including several extinction and turnover events. Using a time-calibrated molecular phylogeny based on seven autosomal protein-coding loci, with over 50% species sampling and three ingroup node calibrations, I show that lanternfishes exhibit a continuously increasing diversification rate, consistent with nonequilibrium speciation dynamics, and three major evolutionary rate shift locations with timing that is similar to those of marine clades in more well-known environments. These results suggest that lanternfish diversification patterns overlapped with major events in the physical partitioning of the ocean volume and that the clade has responded positively to a range of pre-Anthropocene extinction drivers [7]. However, lanternfish respondability to modern extinction drivers-habitat loss and overexploitation-is best addressed with populational and ecological data and remains largely unknown. (Copyright © 2018 Elsevier Ltd. All rights reserved.) |
| Databáze: | MEDLINE |
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