Habitat segregation and ecological character displacement in cryptic African malaria mosquitoes.
Habitat segregation and ecological character displacement in cryptic African malaria mosquitoes.
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DOI：
10.1111/eva.12242
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发表时间：
2015-04
影响因子：
4.1
通讯作者：
Costantini C
中科院分区：
文献类型：
--
作者：
Tene Fossog B;Ayala D;Acevedo P;Kengne P;Ngomo Abeso Mebuy I;Makanga B;Magnus J;Awono-Ambene P;Njiokou F;Pombi M;Antonio-Nkondjio C;Paupy C;Besansky NJ;Costantini C
理解趋异选择如何产生适应性表型和种群多样性，为最近分离的物种对的物种形成提供了一个机械解释。为了实现这一目标，我们寻找了神秘的疟疾媒介按蚊coluzzii和冈比亚按蚊之间的分歧的生态梯度，然后寻找可能导致这种分歧的生理特征。利用大量的发生记录和生态地理信息，我们建立了一个分布模型来预测这两个物种在同域分布范围内的优势。我们的模型预测了两个新的梯度沿着物种分离：距离海岸线和海拔。科氏按蚊呈双峰分布，主要分布在西非干旱大草原和沿着非洲西部沿海边缘。为了测试是否在耐盐性的差异，这种栖息地隔离的基础上，我们评估了急性剂量死亡率的反应，从中非的32个幼虫种群的盐度。与其沿海优势一致，科氏按蚊总体上比冈比亚按蚊更耐受。然而，这两个物种的耐盐性，收敛在城市地区，大概反映了人为污染物的渗透胁迫的适应性反应。当比较程度的宽容与水平的同调，我们发现的证据，字符位移在这一特点。
Understanding how divergent selection generates adaptive phenotypic and population diversification provides a mechanistic explanation of speciation in recently separated species pairs. Towards this goal, we sought ecological gradients of divergence between the cryptic malaria vectors Anopheles coluzzii and An. gambiae and then looked for a physiological trait that may underlie such divergence. Using a large set of occurrence records and eco-geographic information, we built a distribution model to predict the predominance of the two species across their range of sympatry. Our model predicts two novel gradients along which the species segregate: distance from the coastline and altitude. Anopheles coluzzii showed a ‘bimodal’ distribution, predominating in xeric West African savannas and along the western coastal fringe of Africa. To test whether differences in salinity tolerance underlie this habitat segregation, we assessed the acute dose–mortality response to salinity of thirty-two larval populations from Central Africa. In agreement with its coastal predominance, Anopheles coluzzii was overall more tolerant than An. gambiae. Salinity tolerance of both species, however, converged in urban localities, presumably reflecting an adaptive response to osmotic stress from anthropogenic pollutants. When comparing degree of tolerance in conjunction with levels of syntopy, we found evidence of character displacement in this trait.
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DOI：
10.4269/ajtmh.2008.78.169
发表时间：
2008-01-01
影响因子：
3.3
作者：
Calzetta, Maria;Santolamazza, Federica;Petrarca, Vincenzo
通讯作者：
Petrarca, Vincenzo
影响因子：
4.9
作者：
Cassone BJ;Kamdem C;Cheng C;Tan JC;Hahn MW;Costantini C;Besansky NJ
通讯作者：
Besansky NJ
影响因子：
3
作者：
Caputo B;Nwakanma D;Jawara M;Adiamoh M;Dia I;Konate L;Petrarca V;Conway DJ;della Torre A
通讯作者：
della Torre A
影响因子：
6.8
作者：
AKAIKE, H
通讯作者：
AKAIKE, H
影响因子：
56.9
作者：
Coluzzi, M;Sabatini, A;Petrarca, V
通讯作者：
Petrarca, V