Are communication activities shaped by environmental constraints in reverberating and absorbing forest habitats?

Anais da Academia Brasileira de Ciências

Nicolas Manthevon²  Thierry Aubin²  Torben Dabelsteen¹  Jacques M.e. Vielliar¹ 

[1] ,Université Paris-SudOrsay

关键词: acoustic communication;    propagation-induced modifications;    environmental constraints;    evolution of communication;    comunicação acústica;    modificações induzidas pela propagação;    limitações ambientais;    evolução da comunicação;   

DOI  :  10.1590/S0001-37652004000200011

来源: SciELO

【 摘 要 】

In the dense vegetation of temperate or tropical forests, communication processes are constrained by propagation-induced modifications of the transmitted sounds. The presence of leaves, trunks and branches induces important sound reverberation and absorption leading to diminution of the signal energy as well as qualitative modifications. The aim of this paper is to briefly review the different strategies used by birds to manage with these constraints. At the emitter's level, an adapted emission behavior which takes into account both the physical heterogeneities of the forest environment and the temporal variations of the acoustic constraints, is especially useful to control the active space of signaling. The coding of information into acoustic parameters that have different susceptibility to propagation constraints is also of great interest. At the receiver's level, an adaptive reception behavior (listening post) and a great tolerance to sound degradation during the decoding process are the keys to an optimal communication process.

【 授权许可】

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