Collapse of a protector species drives secondary endangerment in waterbird communities

Show simple item record Poysa, Hannu Lammi, Esa Poysa, Silvo Vaananen, Veli-Matti 2020-12-18T02:53:08Z 2021-12-17T22:45:41Z 2019-02
dc.identifier.citation Poysa , H , Lammi , E , Poysa , S & Vaananen , V-M 2019 , ' Collapse of a protector species drives secondary endangerment in waterbird communities ' , Biological Conservation , vol. 230 , pp. 75-81 .
dc.identifier.other PURE: 125081060
dc.identifier.other PURE UUID: c7bfd4fd-8868-4dad-9392-cf59a928ed0f
dc.identifier.other WOS: 000468703700011
dc.identifier.other Scopus: 85058554177
dc.description.abstract Interactions and dependence between species can transmit the effects of species declines within and between trophic levels, resulting in secondary endangerments and, in some cases, extinctions. Many mixed-species avian breeding aggregations commonly have a protector species whose aggressive nest defense is used by other species to defend their nests. Disappearance of the protector species may have population demographic consequences on the dependent species. Aggressive nest defense behavior of small colonial gulls, such as the black-headed gull (Chroicocephalus ridibundus), is used by many waterbird species to gain protection against predators. We used data from 15 local waterbird communities in Finland to study long-term changes and dynamics of breeding numbers of other waterbirds as a response to long-term changes and dynamics of black-headed gull colonies. We found that breeding numbers of many species tracked long-term changes in the size of black-headed gull colonies. This was true even after controlling for a common trend in the size of the black-headed gull colony and the breeding numbers of the other species. The trend-controlled positive temporal association with black-headed gull was relatively stronger in species that nest in similar habitats of a lake as the black-headed gull, and in species that have a more critical conservation status due to drastic population decline. Our results suggest that the overall decline of black-headed gull colonies has resulted in secondary endangerment of many other species in waterbird communities. en
dc.format.extent 7
dc.language.iso eng
dc.relation.ispartof Biological Conservation
dc.rights cc_by_nc_nd
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Conservation status
dc.subject Gull colony
dc.subject Population trend
dc.subject Secondary endangerment
dc.subject Species interaction
dc.subject Threatened species
dc.subject MANN-KENDALL
dc.subject GULL COLONIES
dc.subject POPULATION
dc.subject DUCKS
dc.subject ASSOCIATION
dc.subject PREDATORS
dc.subject ABUNDANCE
dc.subject REMOVAL
dc.subject 1181 Ecology, evolutionary biology
dc.subject 119 Other natural sciences
dc.title Collapse of a protector species drives secondary endangerment in waterbird communities en
dc.type Article
dc.contributor.organization Department of Forest Sciences
dc.contributor.organization Wetland Ecology Group
dc.contributor.organization Forest Ecology and Management
dc.description.reviewstatus Peer reviewed
dc.relation.issn 0006-3207
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

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