Phylogenetic correlates of extinction risk in mammals: species in older lineages are not at greater risk
Phylogenetic correlates of extinction risk in mammals: species in older lineages are not at greater risk
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DOI：
10.1098/rspb.2013.1092
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发表时间：
2013-08-22
影响因子：
4.7
通讯作者：
Fisher, Diana O.
中科院分区：
文献类型：
--
作者：
Arregoitia, Luis Darcy Verde;Blomberg, Simon P.;Fisher, Diana O.
系统发育信息正在成为评估保护重点的公认基础，但灭绝风险与系统发育特性（如多样化率和系统发育谱系年龄）之间的关系尚不清楚。有限的分类群特异性分析表明，较老谱系的物种面临更大的风险。我们计算了哺乳动物系统发育的定量特性，并以国际自然保护联盟红色名录分类为基础，建立了灭绝风险的序数指数模型。我们测试了3308种陆生哺乳动物的谱系年龄、分支大小、进化独特性和灭绝风险之间的关系。我们没有显示出显著的全球或区域关联，在分类群中有三个显著的关系。进化上独特的灵长类动物的灭绝风险增加，当狐猴被排除在外时，灭绝风险随着谱系年龄的增长而降低。近亲较多的兔、野兔和鼠兔受到的威胁较小。我们研究了173个属的净多样化率与灭绝风险之间的关系，没有发现任何模式。我们的结论是，尽管在谱系年龄的频率分布中代表性不足，但在更古老、进化更慢和独特的谱系中，物种并不更容易受到威胁或灭绝。然而，它们的灭绝将代表着独特进化史的不成比例的损失。
Phylogenetic information is becoming a recognized basis for evaluating conservation priorities, but associations between extinction risk and properties of a phylogeny such as diversification rates and phylogenetic lineage ages remain unclear. Limited taxon-specific analyses suggest that species in older lineages are at greater risk. We calculate quantitative properties of the mammalian phylogeny and model extinction risk as an ordinal index based on International Union for Conservation of Nature Red List categories. We test for associations between lineage age, clade size, evolutionary distinctiveness and extinction risk for 3308 species of terrestrial mammals. We show no significant global or regional associations, and three significant relationships within taxonomic groups. Extinction risk increases for evolutionarily distinctive primates and decreases with lineage age when lemurs are excluded. Lagomorph species (rabbits, hares and pikas) that have more close relatives are less threatened. We examine the relationship between net diversification rates and extinction risk for 173 genera and find no pattern. We conclude that despite being under-represented in the frequency distribution of lineage ages, species in older, slower evolving and distinct lineages are not more threatened or extinction-prone. Their extinction, however, would represent a disproportionate loss of unique evolutionary history.