Salmon Increase Forest Bird Abundance and Diversity

Resource type
Date created
2019-02-06
Authors/Contributors
Abstract
Resource subsidies across ecosystems can have strong and unforeseen ecological impacts. Marine-derived nutrients from Pacific salmon (Onchorhycus spp.) can be transferred to streams and riparian forests through diverse food web pathways, fertilizing forests and increasing invertebrate abundance, which may in turn affect breeding birds. We quantified the influence of salmon on the abundance and composition of songbird communities across a wide range of salmon-spawning biomass on 14 streams along a remote coastal region of British Columbia, Canada. Point-count data spanning two years were combined with salmon biomass and 13 environmental covariates in riparian forests to test for correlates with bird abundance, foraging guilds, individual species, and avian diversity. We show that bird abundance and diversity increase with salmon biomass and that watershed size and forest composition are less important predictors. This work provides new evidence for the importance of salmon to terrestrial ecosystems and information that can inform ecosystem-based management.
Document
Published as
Wagner MA, Reynolds JD (2019) Salmon increase forest bird abundance and diversity. PLoS ONE 14(2): e0210031. DOI: 10.1371/journal.pone.0210031
Publication title
PLoS ONE
Document title
Salmon increase forest bird abundance and diversity
Date
2019
Volume
14
Issue
2
Publisher DOI
10.1371/journal.pone.0210031
Copyright statement
Copyright is held by the author(s).
Scholarly level
Peer reviewed?
Yes
Language
Member of collection
Attachment Size
journal.pone_.0210031.pdf 1.52 MB