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Cover Picture and Issue Information
Publication year - 2019
Publication title -
methods in ecology and evolution
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 3.425
H-Index - 105
ISSN - 2041-210X
DOI - 10.1111/2041-210x.13051
Subject(s) - quantile regression , cover (algebra) , quantile , geocoding , boundary (topology) , computer science , reciprocal , econometrics , artificial intelligence , geography , mathematics , machine learning , cartography , linguistics , engineering , mechanical engineering , mathematical analysis , philosophy
This month’s cover shows a dark‐eyed junco ( Junco hyemalis ) singing. Boundary trade‐offs often limit the co‐distribution of behavioural, ecological, life‐history, and other traits. In this issue, Cardoso uses birdsong as a case study to evaluate how well quantile regression estimates distances to boundary trade‐offs. While quantile regression tests for the existence of boundary trade‐offs, it provides a poor indication of distances from individual data points to the real boundary limits. Using double quantile regression instead (the consensus of reciprocal quantile regressions) robustly assesses distances to these boundaries. Photo credit: © David Levinson