Data from: Spatio-temporal modelling of auk abundance after the Erika oil spill and implications for conservation ...

• Main Authors: Le Rest, Kévin, Certain, Grégoire, Debétencourt, Benjamin, Bretagnolle, Vincent
• Format: Dataset
• Language: English
• Published: Dryad 2016
• Subjects: Sardina pilchardus; Auks; Spatio-temporal autocorrelation; 1985 to 2015; Sprattus sprattus; Ammodytes sp.; Uria aalge; Population trends; November 2001 to March 2002; November 2011-February 2012; Fratercula arctica; Engraulis encrasicolus; Bay of Biscay; Small pelagic fish; Clupea harengus; Erika oil spill; November 2001-March 2002; November 2011 to February 2012; Alca torda; Dynamic distribution; fratercula; uria
• Online Access: https://dx.doi.org/10.5061/dryad.1hv28; https://datadryad.org/stash/dataset/doi:10.5061/dryad.1hv28

Species distribution models are widely used in applied ecology and conservation. While accounting for spatial dependences is now the rule, temporal dependences have rarely been dealt with explicitly. In this study, we analyse wintering auk distribution in the Bay of Biscay and English Channel and estimate changes in abundance within and between years while accounting for space–time dependencies. We then propose a retrospective estimate of the impact of the Erika oil spill that occurred in December 1999. Two series of extensive aerial surveys, repeated at intervals of 1–2 months, were carried out at a 10-year interval off the French Atlantic coast (2001–2002 and 2011–2012). Spatially and temporally explicit Bayesian models were fitted to these data to provide spatio-temporal predictions of auk abundance. These were then used to compare abundances within the area affected by the Erika oil spill two and twelve years after the catastrophe. The results showed that 1·55 million auks wintered in the study area in ... : The SAMM data (RData)The 2011-2012 data analysed in this paper. List of variables: POSIX.time: Date and hours of the counts; GroupTime: Group of time used for analysis (see paper); SeaState: Sea state at Beaufort scale; CloudCover: Cloud cover from 0 to 8; GlareSeverity: Glare severity from 1 to 3 (0 when no glare); GlareArea: Width of the glare in degree (from 0 to 220°, see paper); DistCoast: Distance from the coast in kilometers; AtlanticArea: Atlantic (1) vs. English Channel (0) area; Alcides: Number of auks counted within segments from both sides; SegmentLength: Length of the segment in meters.data.SAMM.RDataThe ROMER data (RData)The 2001-2002 data analysed in this paper. List of variables: MonthfromOctober: ID of month from October 2001, e.g. 2 stands for November 2001; Alcides: Number of auks counted within 5km segments from the side without glare; SeaState: Sea state at Beaufort scale; CloudCover: Cloud cover from 0 to 4; DistCoast: Distance from the coast in kilometers.data.ROMER.RDataSmall pelagic ...