DOI: 10.5061/dryad.3dk6r
title: Data from: Effects of food abundance and early clutch predation on reproductive timing in a high Arctic shorebird exposed to advancements in arthropod abundance

description: Climate change may influence the phenology of organisms unequally across
 trophic levels and thus lead to phenological mismatches between predators
 and prey. In cases where prey availability peaks before reproducing
 predators reach maximal prey demand, any negative fitness consequences
 would selectively favor resynchronization by earlier starts of the
 reproductive activities of the predators. At a study site in northeast
 Greenland, over a period of 17 years, the median emergence of the
 invertebrate prey of Sanderling Calidris alba advanced with 1.27 days per
 year. Yet, over the same period Sanderling did not advance hatching date.
 Thus, Sanderlings increasingly hatched after their prey was maximally
 abundant. Surprisingly, the phenological mismatches did not affect chick
 growth, but the interaction of the annual width and height of the peak in
 food abundance did. Chicks grew especially better in years when the food
 peak was broad. Sanderling clutches were most likely to be depredated
 early in the season, which should delay reproduction. We propose that high
 early clutch predation may favor a later reproductive timing.
 Additionally, our data suggest that in most years food was still abundant
 after the median date of emergence, which may explain why Sanderlings did
 not advance breeding along with the advances in arthropod phenology.
description: Reneerkens et al 2016
 Ecol&Evol -Clutch survivalTable of histories of
 Sanderling (Calidris alba) clutches in Zackenberg, northeast Greenland,
 2007-2013. Columns contain data about (1) “Date found”, the day of the
 breeding season on which the nest was found; (2) “Date last checked when
 alive”, the last day the clutch was checked when alive; (3) “Date last
 checked”, the last day the clutch was checked; (4) “Fate”, the fate of the
 nest (0 = successfully hatched, 1 = depredated) and (5) “Hatch date”, the
 date of hatch, which was observed in case the clutch was successful, or
 estimated based on egg flotation, in case the clutch was not successful.
 Dates are scaled such that 10 June is day 1, the earliest date at which a
 clutch was found. Further information is found in the methods section of
 the publication.Reneerkens et al 2016
 Ecol&Evol - Arthropod abundanceTable of arthropod
 abundance in Zackenberg in the years 1996-2013 (excluding 2010). Columns
 contain data about Year, Date (day of year), and the number of individual
 arthropods per pitfall trap per day for the orders Aranea, Diptera,
 Hemiptera, Hymenoptera, Lepidoptera and Thysanoptera. Further information
 is found in the methods section of the publication. Data have been
 collected within the BioBasis programme of the Greenland Ecosystem
 Monitoring (GEM) and are publicly available via
 http://data.g-e-m.dk/.Reneerkens et al 2016
 Ecol&Evol -Growth curveTable of body mass of
 Sanderling (Calidris alba) chicks of varying ages (in days) at Zackenberg
 and Hochstetter Forland (northeast Greenland). Individuals are identified
 by their ringnumber and the family (NestID). Further information is found
 in the methods section of the publication.Reneerkens et al 2016
 Ecol&Evol -Sanderling hatch datesTable of hatch dates of
 Sanderling (Calidris alba) clutches in Zackenberg, northeast Greenland.
 Hatch dates of clutches that successfully hatched are observed hatch
 dates. Hatch dates of clutches that did not hatch were estimates based on
 egg flotation, and those of broods are based on the estimated age of the
 chicks using a species-specific growth curve of body mass. Further
 information is found in the methods section of the
 publication.Reneerkens et al 2016
 Ecol&Evol -Snow coverTable of snow cover on
 the Aucella mountain in the Zackenberg monitoring area. The location is
 “Aucella_S_low”, where most Sanderling (Calidris alba) clutches were found
 and for which a most complete dataset existed. Snow cover is given as the
 percentage of the total area in the region per date. Data have been
 collected within the GeoBasis programme of the Greenland Ecosystem
 Monitoring and are publicly available via http://data.g-e-m.dk/, where
 also information can be found about the location and size of the daily
 photographed area. Further information is found in the methods section of
 the publication.Reneerkens et al 2016
 Ecol&Evol -Arthropod sizeTable of sizes (and
 biomass) of individual arthropods collected in Zackenberg, summer 2007.
 Each of the 6 plots (ART5, ART 7, INS1, INS2, INS3 and INS4) consisted of
 a line of 10 yellow pitfall traps at ca. 1 meter distance from each other.
 Occasionally, arthropods were identified to the order and, if possible,
 family level. Identified orders were Acari (ACAR), ARAN, Coleoptera
 (COLE), Diptera (DIPT), Hymenoptera (HYME), and Lepidoptera (LEPI).
 Identified families, within the before mentioned orders, were Apidae,
 genus Bombus (BOMB), Calliphoridae (CALL), Chironomidae (CHIR), Culicidae
 (CULI), Gnaphosidae (GNAP), Hemiptera (HEMI), Heteroptera (HETE),
 Linyphiidae (LINY), Lycosidae (LYCO), Muscidae (MUSC), Noctuidae (NOCT),
 Nymphalidae (NYMP), Parasitica (PARA), Phoridae (PHOR), Pieridae (PIER),
 Sciaridae (SCIA), Syrphidae (SYRP), Thomisidae (THOM), Tipulidae (TIPU)
 and Trichoceridae (TRIC). LARV stands for larvae of the specified order or
 families. Further information is found in the appendix S1 of the
 publication.