Evidence map›Paper›PMID 34772460›Full record

ArticleMovement ecology2021

GPS tracking reveals landfill closures induce higher foraging effort and habitat switching in gulls.

Liam P Langley, Stuart Bearhop, Niall H K Burton, Alex N Banks, Tim Frayling, Chris B Thaxter, Gary D Clewley, Emily Scragg, Stephen C Votier

Abstract read
In one paragraph

Article in Movement ecology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Liam P LangleyCentre for Ecology and Conservation, University of Exeter, Penryn, TR10 9EZ, UK. liam.langley@exeter.ac.uk.
Stuart BearhopCentre for Ecology and Conservation, University of Exeter, Penryn, TR10 9EZ, UK.
Niall H K BurtonBritish Trust for Ornithology, The Nunnery, Thetford, IP24 2PU, UK.
Alex N BanksNatural England, Sterling House, Exeter, EX1 1QA, UK.
Tim FraylingNatural England, Sterling House, Exeter, EX1 1QA, UK.
Chris B ThaxterBritish Trust for Ornithology, The Nunnery, Thetford, IP24 2PU, UK.
Gary D ClewleyBritish Trust for Ornithology, The Nunnery, Thetford, IP24 2PU, UK.
Emily ScraggBritish Trust for Ornithology, The Nunnery, Thetford, IP24 2PU, UK.
Stephen C VotierLyell Centre, Heriot-Watt University, Edinburgh, UK. s.c.votier@hw.ac.uk.

Funding

Natural Environment Research Council NE/ N009045/1
6 · The paper itself

Abstract

backgroundLandfills are a major subsidy for some animals, with implications for their life history and demography. Gulls feed extensively on food from landfills and closures are expected to have ecological consequences, but how this influences movement ecology is virtually unknown.

methodsWe used GPS-tracking to quantify foraging behaviour and habitat choice of lesser black-backed gulls (Larus fuscus) breeding at two colonies before and after closure of two nearby landfills.

resultsFollowing closure, gulls from both colonies travelled further and for longer to forage. Gulls also changed habitat selection, although this differed by colony - birds from one colony shifted to agricultural habitats, while at the other, increased their use of urban areas. These behavioural responses had no effect on adult body condition but hint at potential direct effects of higher foraging costs and indirect impacts by shifting to new habitats.

conclusionsOur results demonstrate how landfill availability influences gull foraging movements and habitat selection. We also emphasize the value of biologging to detect rapid behavioural responses in contrast to more conventional demographic approaches, which is especially important for animals that spend the majority of their lives away from direct observation.

Indexed as

Anthropogenic ChangeGeneralistsLarus fuscusLesser Black-backed GullManagementPAFS

Identifiers

PMID34772460
PMCPMC8588598

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.