Species time-share the acoustic space to minimize signal interference
Evidence
During a dawn chorus many species and individuals sing with a temporal turnover to minimize the interference effect. … Time partitioning was observed by Luther (2008): among 106 species of birds that sang at dawn in Alta Forest, Mato Grosso, Brazil, 34 species sang in a 30-min or 1-h time. Of these species, 2 sang within 30 min of sunrise: the white-browed antbird (Myrmoborus leucophrys) and warbling antbird (Hypocnemis cantator striata). Two other species, the chestnut-backed antshrike (Thamnophilus palliatus palliatus) and the black-faced antthrush (Formicarius analis), sang more frequently during 1–2 h after sunrise (Fig. 4.11). Playback experiments were conducted with these 4 species, receiving replies from each species during the typical song time. Response outside the typical song period was observed but was less intense and less immediate. This experiment has proved that some species use temporal partitioning to reduce acoustic interference. — Almo Farina, Soundscape Ecology, 750
Categorization
- XREF: connects to: Species in a habitat partition acoustic space into distinct non-overlapping bandwidths. — Bernie Krause and Almo Farina, Using Ecoacoustic Methods to Survey the…, 39; Each species occupies a distinct acoustic niche to avoid signal competition — Almo Farina, Soundscape Ecology: Principles,…, 387; Acoustic niche partitioning operates through both spatial movement and temporal scheduling — Almo Farina, Soundscape Ecology: Principles,…, 474 (+2 more)
Broader Connections
- Species shift calls to ultrasonic frequencies to escape constant noise masking
#exemplifies(0.95) — Almo Farina, Soundscape Ecology, 1288 - Habitat-specific ambient noise can drive the evolution of animal signals
#expands(0.80) — Almo Farina, Soundscape Ecology, 336