Habitat fragmentation affects culture transmission: patterns of song matching in Dupont's lark
Habitat fragmentation affects culture transmission: patterns of song matching in Dupont's lark
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DOI：
10.1111/j.1365-2664.2005.01093.x
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发表时间：
2005-12-01
影响因子：
5.7
通讯作者：
Tella, JL
中科院分区：
文献类型：
--
作者：
Laiolo, P;Tella, JL
1.许多鸟类的雄性在领地互动中与邻居一起唱歌。虽然鸟类的拟声行为受到了广泛的关注，但对鸟类的拟声行为与生态因子（如景观几何学和栖息地破碎化）之间的关系仍知之甚少，而且以往的研究大多局限于一个物种的一个或几个种群。本研究分析了一种稀有的草原雀形目杜氏雀雀鸣唱匹配的空间格局和生态决定因素。通过记录来自21个西班牙和摩洛哥地方的鸟类歌声，我们分析了栖息地破碎化和适宜草原栖息地的可用性对杜邦云雀歌声匹配模式的影响，控制了其他潜在的决定因素，如繁殖季节的时间，竞争的强度，地理位置和个体的空间分布.两个歌曲类型共享（匹配的曲目中的歌曲类型）和spectrotemporal匹配（收敛在相同的歌曲类型的声学特征）之间的反唱邻居比非邻居，和空间自相关（唱歌的个人之间的相似性）只发生在短距离。研究地点不同的个体之间的整体声学匹配的量，似乎是由于当地的差异，在男性竞争的强度和合适的栖息地的可用性。非邻居之间的歌曲类型共享的水平趋于增加和邻居之间的减少与草原可用性的增加。此外，现有的邻居和非邻居之间的共享的差异受到草原的碎片化因素的存在显着影响。在破碎化的栖息地中，邻居之间的歌曲分享得到了加强，可能是因为对有限资源的竞争更加激烈;相反，非邻居之间的分享下降，可能是因为被栖息地障碍隔离的个体之间缺乏互动。合成与应用。人为的栖息地障碍可能会改变鸟类感知的空间分布的竞争对手的距离，导致收缩的空间范围的个人声学生态位。我们建议，通信系统的生境敏感的物种可能会被用来作为一个行为指标的人为环境恶化。由于其迅速演变的文化性质，鸟类的叫声可能成为一个早期预警系统，在相对较短的时间内，在其他指标（如遗传标记）显示任何变化之前，检测碎片化的影响。
1. Males of many bird species match song with neighbours during territorial interactions. Although bird vocal mimicry has received much attention, the relationships between song variation and ecological factors such as landscape geometry and habitat fragmentation are still poorly known, and most previous research has been limited to one or a few populations of a species. In this study we analysed the spatial patterns and ecological determinants of song matching in Dupont's lark Chersophilus duponti, a rare and specialized steppe passerine.2. By recording bird songs from 21 Spanish and Moroccan localities, we analysed the effect of habitat fragmentation and the availability of suitable steppe habitat on the patterns of song matching in Dupont's lark, controlling for other potential determinants such as period in the breeding season, intensity of competition, geographical location and spatial distribution of individuals.3. Both song-type sharing (match of song types in the repertoire) and spectrotemporal matching (convergence in the acoustic features of the same song type) were greater between counter-singing neighbours than between non-neighbours, and spatial autocorrelation (similarities between singing individuals) only occurred at short distances. The study localities differed in the amount of overall acoustic matching between individuals, seemingly as a consequence of local differences in the intensity of male competition and in the availability of suitable habitat.4. The levels of song-type sharing between non-neighbours tended to increase and those among neighbours to decrease with the increase of steppeland availability. Moreover, the existing differences in sharing between neighbours and non-neighbours were significantly affected by the presence of elements of fragmentation in the steppe. In fragmented habitats, song sharing among neighbours was enhanced, possibly because of harsher competition for limited resources; conversely, sharing among non-neighbours dropped, probably because of the lack of interactions among individuals isolated by habitat barriers.5. Synthesis and applications. Anthropogenic habitat barriers could alter bird perception of the spatial distribution of rivals over distance, leading to a contraction of the spatial range of the individual acoustic niche. We suggest that communication systems of habitat-sensitive species might be used as a behavioural indicator of anthropogenic environmental deterioration. Because of their rapidly evolving cultural nature, bird vocalizations might become an early warning system detecting the effects of fragmentation over relatively short times and before other indicators (such as genetic markers) show any change.