The evolution of contact calls in isolated and overlapping populations of two white-eye congeners in East Africa (Aves, Zosterops).
The evolution of contact calls in isolated and overlapping populations of two white-eye congeners in East Africa (Aves, Zosterops).
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DOI：
10.1186/1471-2148-14-115
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发表时间：
2014-06-02
影响因子：
3.4
通讯作者：
Habel JC
中科院分区：
文献类型：
--
作者：
Husemann M;Ulrich W;Habel JC
密切相关的物种往往出现在地理隔离，但有时形成接触区的潜力杂交。合子前障碍可能会阻止此类接触区的杂交繁殖。在东非，绣眼鸟已经进化成不同的物种，栖息在不同的栖息地类型。Zosterops poliogaster分布于高海拔凉爽潮湿的云雾林中，而Z.阿比西尼亚分布在干热的低地稀树草原。在大多数地区，这两个种发生异地，但在接触地带，山满足稀树萨凡纳，这些种的分布有时重叠（parapatry），并在少数地区的两个类群发生同域。声音交流被认为是鸟类重要的物种识别机制，也是影响杂交的前合子障碍。我们记录了接触呼叫的低地和高地物种在（一）不同的人群（allopatry），（二）沿着接触区（parapatry），和（iii）在重叠的人群（同域），以测试物种和种群分化。我们发现，在调用特性之间的显着差异，高地和低地物种，除了调用分化的物种。Z高地。poliogaster在当地种群中显示出强烈的叫声分化，伴随着种群内它们的接触叫声的相对较低的变异性（即小的声学空间）。相比之下，低地Z.阿比西尼亚没有分化的地方网站，但显示相对较高的变化，在单一的人口呼吁。在这两个物种的呼叫模式显示地理倾斜的纬度和经度。从parapatric人口从这两个物种的电话表现出更大的相似性，其他类群相比，异种种群中发现的allopatry。然而，当这两个物种同域发生时，两个物种的接触呼叫彼此之间的差异比在异域或parapatric种群中的差异更大。对比模式反映了不同的空间分布：高地Z。poliogaster种群是高度分离的，而Z.阿比西尼亚低地种群是相互联系的。异种种群的接触叫声相似性较高，可能是由于混杂。与此相反，同域种群表现出生殖特征位移，导致强烈分歧的呼叫模式。
Closely related species often occur in geographic isolation, yet sometimes form contact zones with the potential to hybridize. Pre-zygotic barriers may prevent cross breeding in such contact zones. In East Africa, White-eye birds have evolved into various species, inhabiting different habitat types. Zosterops poliogaster is found in cool and moist cloud forests at higher elevations, whereas Z. abyssinicus is distributed across the dry and hot lowland savannahs. In most areas, these two species occur allopatrically, but in the contact zone where the mountain meets the savannah, the distributions of these species sometimes overlap (parapatry), and in a few areas the two taxa occur sympatrically. Acoustic communication is thought to be an important species recognition mechanism in birds and an effective prezygotic barrier for hybridisation. We recorded contact calls of both the lowland and highland species in (i) distinct populations (allopatry), (ii) along contact zones (parapatry), and (iii) in overlapping populations (sympatry) to test for species and population differentiation. We found significant differences in call characteristics between the highland and lowland species, in addition to call differentiation within species. The highland Z. poliogaster shows a strong call differentiation among local populations, accompanied by comparatively low variability in their contact calls within populations (i.e. a small acoustic space). In contrast, calls of the lowland Z. abyssinicus are not differentiated among local sites but show relatively high variability in calls within single populations. Call patterns in both species show geographic clines in relation to latitude and longitude. Calls from parapatric populations from both species showed greater similarity to the other taxon in comparison to heterospecific populations found in allopatry. However, where the two species occur sympatrically, contact calls of both species are more distinct from each other than in either allopatric or parapatric populations. The contrasting patterns reflect divergent spatial distributions: the highland Z. poliogaster populations are highly disjunct, while Z. abyssinicus lowland populations are interconnected. Higher similarity in contact calls of heterospecific populations might be due to intermixing. In contrast, sympatric populations show reproductive character displacement which leads to strongly divergent call patterns.
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影响因子：
2.1
作者：
Haavie, J;Borge, T;Sætre, GP
通讯作者：
Sætre, GP
影响因子：
2.2
作者：
Habel, Jan Christian;Cox, Siobhan;Lens, Luc
通讯作者：
Lens, Luc
影响因子：
2.4
作者：
Beltman, JB;Haccou, P;ten Cate, C
通讯作者：
ten Cate, C
DOI：
10.1111/j.1095-8312.2010.01532.x
发表时间：
2010-12-01
影响因子：
1.9
作者：
Cole, Jeffrey A.
通讯作者：
Cole, Jeffrey A.
影响因子：
3.3
作者：
Clegg, Sonya M.;Frentiu, Francesca D.;Owens, Ian P. F.
通讯作者：
Owens, Ian P. F.