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Niche divergence and paleo-distributions of Lutzomyia longipalpis mitochondrial haplogroups (Diptera: Psychodidae).
Acta Tropica ( IF 2.7 ) Pub Date : 2020-06-27 , DOI: 10.1016/j.actatropica.2020.105607
David A Moo-Llanes 1 , Angélica Pech-May 2 , Ana C Montes de Oca-Aguilar 3 , Oscar D Salomón 4 , Janine M Ramsey 1
Affiliation  

Lutzomyia longipalpis is a complex of species which has a wide but discontinuous distribution from southeastern Mexico to northern Argentina and Uruguay. To date, eight mitochondrial haplogroups have been identified along its distribution although key environmental tolerances and ecological niche models have been analyzed only at the complex level. The aim of the present study was to analyze whether genetic diversification using three mitochondrial genes of the Lu. longipalpis complex is associated with niche divergence and to explore evolution of distributional projections of all haplogroups between the Last Glacial Maximum (LGM; 21,000 yrs ago) and the present. Current occurrence of all haplogroups was used to develop ecological niche models (ENM) and these were projected in both periods to quantify and identify geographic area shifts. Environmental space was used to estimate niche similarity between major clades and pairwise between individual haplogroups. The two major Lu. longipalpis clades (Mex, CA, Col and Ven vs Arg and Bra) had significantly different environmental space, indicating niche divergence. Environmental space overlap of southern haplogroups was variable, with divergent niche, except between Arg and ArgBra. The most suitable regions for the ArgBra haplogroup were northeastern and southeastern Brazil, and the Gran Chaco region. In contrast, ENM of haplogroups within the northern major clade have significantly similar niche, with highest geographic ENM suitability along both the Caribbean and Pacific coasts. The intensity and coverage of high suitability areas in the LGM decreased for most haplogroups in the present. Integrating ENM and phylogenetic analyses has allowed us to test hypotheses of niche similarity between Lu. longipalpis haplogroups and major clades, and to identify conserved distributional areas of haplogroups since the LGM, with the exception of Arg. Evidence for distributional shifts and overlap of haplogroups is important to analyze Leishmaniasis´ eco-epidemiology and to successfully monitor and control transmission.



中文翻译:

Lutzomyia longipalpis线​​粒体单倍群的生态位散布和古分布(双翅目:Psychodidae)。

Lutzomyia longipalpis是一个复杂的物种,从墨西哥东南部到阿根廷北部和乌拉圭分布广泛但不连续。迄今为止,尽管仅在复杂水平上分析了关键的环境耐受性和生态位模型,但已沿其分布确定了八个线粒体单倍群。本研究的目的是分析是否使用Lu的三个线粒体基因进行遗传多样化。ip鱼复合体与生态位发散有关,并探讨了最后一个冰期最大值(LGM; 21,000年前)与现在之间所有单倍群的分布预测的演变。所有单倍群的当前发生都被用于开发生态位模型(ENM),并且在两个时期都进行了预测,以量化和确定地理区域的变化。环境空间用于估计主要进化枝之间以及成对的单倍体之间成对的生态位相似性。两大。ip鱼进化枝(Mex,CA,Col和Ven与Arg和Bra相比)具有明显不同的环境空间,表明利基差异。除了Arg和ArgBra之间,南部单倍群的环境空间重叠是可变的,具有不同的生态位。最适合ArgBra单倍群的区域是巴西的东北和东南部以及格兰查科地区。相反,北部主要进化枝内的单倍群的ENM具有非常相似的生态位,在加勒比海和太平洋沿岸的ENM地理适用性最高。目前,大多数单倍群在LGM中高适应性区域的强度和覆盖范围有所下降。将ENM与系统发育分析相结合,使我们能够检验Lu之间的生态位相似性假设。ip鱼单倍体和主要进化枝,并确定自LGM以来,单倍体的保守分布区域,Arg除外。单倍群分布转移和重叠的证据对于分析利什曼病的生态流行病学以及成功地监测和控制传播很重要。

更新日期:2020-06-30
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