Cryptic niche conservatism among evolutionary lineages of an invasive lizard.
Cryptic niche conservatism among evolutionary lineages of an invasive lizard.
复制标题
DOI：
10.1111/j.1466-8238.2011.00665.x
复制
发表时间：
2012-02
影响因子：
6.4
通讯作者：
Ulrich Schulte;A. Hochkirch;S. Lötters;D. Rödder;Silke Schweiger;T. Weimann;M. Veith
中科院分区：
文献类型：
--
作者：
Ulrich Schulte;A. Hochkirch;S. Lötters;D. Rödder;Silke Schweiger;T. Weimann;M. Veith
目的越来越多的证据表明，生态位的质量和广度随着个体、种群、进化谱系的不同而不同，因此也会跨越物种的范围。因此，充分了解不同支系之间的生态位差异可能对预测物种的入侵潜力至关重要。我们首次测试了入侵物种的进化谱系是否会在气候生态位和入侵潜力上有所不同。此外，我们还测试了特定于线性的模型是否表现出比组合模型更好的性能。位置欧洲。方法利用物种分布模型(SDMS)对入侵壁蜥线粒体DNA(MtDNA)分支的种内生态位差异进行了检验。使用DNA条形码，我们将中欧的77个入侵种群划分为8个地理上不同的进化谱系。评估了不同谱系之间的生态位相似性，并利用所有谱系的汇集记录，比较了分支特异性SDM组合和组合SDM的预测能力。结果我们在中欧记录到8个不同的侵袭性mtDNA分支。被分析的分支在其原生和入侵范围内具有相当相似的已实现生态位，而分支间的生态位分化相对较强。然而，我们发现，地理起源(即线粒体DNA分支)与侵袭性事件之间只有微弱的相关性。已经实现的生态位狭窄的分支仍然成为了成功的入侵者，远远超出了它们的原生范围，这很可能是因为更广泛的基本生态位。使用所有侵袭性血统数据的组合模型实现了对侵袭性潜力的更好预测。结论我们的结果表明，进化谱系之间的生态位分化主要是由生态位实现驱动的，而不是由基本生态位的差异驱动的。这种隐晦的生态位保守主义可能会阻碍特定支系生态位模型的成功。隐晦的生态位保守主义通常可以解释物种在明显不适合气候的地区入侵成功的原因。
Aim There is increasing evidence that the quality and breadth of ecological niches vary among individuals, populations, evolutionary lineages and therefore also across the range of a species. Sufficient knowledge about niche divergence among clades might thus be crucial for predicting the invasion potential of species. We tested for the first time whether evolutionary lineages of an invasive species vary in their climate niches and invasive potential. Furthermore, we tested whether lineagespecific models show a better performance than combined models. Location Europe. Methods We used species distribution models (SDMs) based on climatic information at native and invasive ranges to test for intra-specific niche divergence among mitochondrial DNA (mtDNA) clades of the invasive wall lizard Podarcis muralis. Using DNA barcoding, we assigned 77 invasive populations in Central Europe to eight geographically distinct evolutionary lineages. Niche similarity among lineages was assessed and the predictive power of a combination of cladespecific SDMs was compared with a combined SDM using the pooled records of all lineages. Results We recorded eight different invasive mtDNA clades in Central Europe. The analysed clades had rather similar realized niches in their native and invasive ranges, whereas inter-clade niche differentiation was comparatively strong. However, we found only a weak correlation between geographic origin (i.e. mtDNA clade) and invasive occurrences. Clades with narrow realized niches still became successful invaders far outside their native range, most probably due to broader fundamental niches. The combined model using data for all invasive lineages achieved a much better prediction of the invasive potential. Conclusions Our results indicate that the observed niche differentiation among evolutionary lineages is mainly driven by niche realization and not by differences in the fundamental niches. Such cryptic niche conservatism might hamper the success of clade-specific niche modelling. Cryptic niche conservatism may in general explain the invasion success of species in areas with apparently unsuitable climate.