Species splitting increases estimates of evolutionary history at risk

被引:18
|
作者
Robuchon, Marine [1 ,2 ]
Faith, Daniel P. [3 ]
Julliard, Romain [1 ]
Leroy, Boris [2 ]
Pellens, Roseli [4 ]
Robert, Alexandre [1 ]
Thevenin, Charles [5 ]
Veron, Simon [1 ,4 ]
Pavoine, Sandrine [1 ]
机构
[1] Sorbonne Univ, CESCO, Museum Natl Hist Nat, CNRS, 57 Rue Cuvier,CP 135, F-75005 Paris, France
[2] Univ Antilles, Univ Caen Normandie, Museum Natl Hist Nat, CNRS,IRD,Sorbonne Univ,BOREA, F-75005 Paris, France
[3] Australian Museum, Res Inst, Sydney, NSW 2010, Australia
[4] Univ Antilles, Museum Natl Hist Nat, CNRS, ISYEB,EPHE,Sorbonne Univ, 45 Rue Buffon,CP 50, F-75005 Paris, France
[5] Sorbonne Univ, CNRS, INRA, IEES,IRD, Pl Jussieu, F-75005 Paris, France
关键词
Cryptic species; Extinction risk; ExpPDloss; HEDGE; Phylogenetic diversity; Prioritization strategies; PHYLOGENETIC DIVERSITY; CONSERVATION PRIORITIES; PATTERNS; TAXONOMY; WINDOW;
D O I
10.1016/j.biocon.2019.03.041
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
Changes in species concepts and the rapid advances in DNA-based taxonomy and phylogeny of the past decades have led to increasing splits of single species into several new species. The consequences of such splits include the delineation of post-split species that may have restricted ranges and potentially increased extinction risks. Species splitting also leads to a re-evaluation of phylogenetic trees, with post-split trees having more species, but species that are less evolutionarily distinctive compared to pre-split trees. Such changes in extinction risks and distinctiveness may influence strategies for the conservation of phylogenetic diversity (PD). In this study, we evaluated the effect of splitting a species into two sister species on two widely used measures to evaluate PD at risk: (i) the expected loss of phylogenetic diversity associated with a set of species and, (ii) for each species, the gain in the expected phylogenetic diversity if the species is saved from extinction. We developed theoretical predictions and then explored these in a real-world case study of species splitting in the Rhinocerotidae family. Species splitting increases both of our measures related to PD at risk, implying underestimation of PD at risk when valid species splitting is not recognised. This bias may lead to suboptimal conservation decisions: the subset of species or sites given priority for conservation may be different from the subset that actually deserves priority conservation attention. We discuss how our findings can be applied to more complex studies and the perspectives this highlights for accommodating new taxonomic knowledge in conservation strategies.
引用
收藏
页码:27 / 35
页数:9
相关论文
共 50 条