Mapping the ranges and relative abundance of the two principal African malaria vectors, Anopheles gambiae sensu stricto and An-arabiensis, using climate data
Mapping the ranges and relative abundance of the two principal African malaria vectors, Anopheles gambiae sensu stricto and An-arabiensis, using climate data
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DOI：
10.1098/rspb.1998.0369
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发表时间：
1998-05-22
影响因子：
4.7
通讯作者：
Thomas, CJ
中科院分区：
文献类型：
--
作者：
Lindsay, SW;Parson, L;Thomas, CJ
冈比亚按蚊复合体的成员是非洲主要的疟疾病媒。我们测试的假设，范围和相对丰度的两个主要载体在复杂的，一个。gambiae sensu stricto和An.可以用气候来定义。通过使用地理信息系统从气候表面提取每个地点的数据，确定蚊子调查地点的气候特征。年降水量以及年和雨季温度确定了这两个矢量的范围，并用于绘制适宜的气候区。利用西非的数据，我们发现，在物种同域分布的地方，An。冈比亚公司在饱和环境中占主导地位，和一个。在干燥的部位，阿拉伯斑更为常见（r（2）= 0.875，P < 0.001）。我们使用最能描述这种关系的非线性方程来绘制整个非洲的栖息地适宜性。这个简单的模型准确地预测了两种载体在坦桑尼亚的相对丰度（r（s）= 0.745，p = 0.002），物种组成是高度可变的。物种分布范围和相对丰度的综合地图与已发表的地图非常吻合。这一技术是绘制大面积疟疾病媒分布图的一种新方法，可促进针对具体物种的病媒控制活动。
Members of the Anopheles gambiae complex are major malaria vectors in Africa. We tested the hypothesis that the range and relative abundance of the two major vectors in the complex, An. gambiae sensu stricto and An. arabiensis, could be defined by climate. Climate was characterized at mosquito survey sites by extracting data for each location from climate surfaces using a Geographical Information System. Annual precipitation, together with annual and wet season temperature, defined the ranges of both vectors and were used to map suitable climate zones. Using data from West Africa, we found that where the species were sympatric, An. gambiae s.s. predominated in saturated environments, and An. arabiensis was more common in sites subject to desiccation (r(2) = 0.875, p < 0.001). We used the nonlinear equation that best described this relationship to map habitat suitability across Africa. This simple model predicted accurately the relative abundance of both vectors in Tanzania (r(s) = 0.745, p = 0.002), where species composition is highly variable. The combined maps of species' range and relative abundance showed very good agreement with published maps. This technique represents a new approach to mapping the distribution of malaria vectors over large areas and may facilitate species-specific vector control activities.