{"title":"A test of the mechanistic process behind the convergent agonistic character displacement hypothesis.","authors":"Shannon Buckley Luepold, Sandro Carlotti, Gilberto Pasinelli","doi":"10.1093/beheco/arae072","DOIUrl":null,"url":null,"abstract":"<p><p>In this era of rapid global change, understanding the mechanisms that enable or prevent species from co-occurring has assumed new urgency. The convergent agonistic character displacement (CACD) hypothesis posits that signal similarity enables the co-occurrence of ecological competitors by promoting aggressive interactions that reduce interspecific territory overlap and hence, exploitative competition. In northwestern Switzerland, ca. 10% of <i>Phylloscopus sibilatrix</i> produce songs containing syllables that are typical of their co-occurring sister species, <i>Phylloscopus bonelli</i> (\"mixed singers\"). To examine whether the consequences of <i>P. sibilatrix</i> mixed singing are consistent with CACD, we combined a playback experiment and an analysis of interspecific territory overlap. Although <i>P. bonelli</i> reacted more aggressively to playback of mixed <i>P. sibilatrix</i> song than to playback of typical <i>P. sibilatrix</i> song, interspecific territory overlap was not reduced for mixed singers. Thus, the CACD hypothesis was not supported, which stresses the importance of distinguishing between interspecific aggressive interactions and their presumed spatial consequences.</p>","PeriodicalId":8840,"journal":{"name":"Behavioral Ecology","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11457480/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Behavioral Ecology","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1093/beheco/arae072","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/11/1 0:00:00","PubModel":"eCollection","JCR":"Q2","JCRName":"BEHAVIORAL SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
In this era of rapid global change, understanding the mechanisms that enable or prevent species from co-occurring has assumed new urgency. The convergent agonistic character displacement (CACD) hypothesis posits that signal similarity enables the co-occurrence of ecological competitors by promoting aggressive interactions that reduce interspecific territory overlap and hence, exploitative competition. In northwestern Switzerland, ca. 10% of Phylloscopus sibilatrix produce songs containing syllables that are typical of their co-occurring sister species, Phylloscopus bonelli ("mixed singers"). To examine whether the consequences of P. sibilatrix mixed singing are consistent with CACD, we combined a playback experiment and an analysis of interspecific territory overlap. Although P. bonelli reacted more aggressively to playback of mixed P. sibilatrix song than to playback of typical P. sibilatrix song, interspecific territory overlap was not reduced for mixed singers. Thus, the CACD hypothesis was not supported, which stresses the importance of distinguishing between interspecific aggressive interactions and their presumed spatial consequences.
期刊介绍:
Studies on the whole range of behaving organisms, including plants, invertebrates, vertebrates, and humans, are included.
Behavioral Ecology construes the field in its broadest sense to include 1) the use of ecological and evolutionary processes to explain the occurrence and adaptive significance of behavior patterns; 2) the use of behavioral processes to predict ecological patterns, and 3) empirical, comparative analyses relating behavior to the environment in which it occurs.