Unexpected diversity in socially synchronized rhythms of shorebirds

Bulla, Martin; Vâlcu, Mihai; Dokter, Adriaan M.; Dondua, Alexei G.; Kosztolányi, András; Rutten, Anne L.; Helm, Barbara; Sandercock, Brett K.; Casler, Bruce; Ens, Bruno J.; Spiegel, Caleb S.; Hassell, Chris J.; Küpper, Clemens; Minton, Clive; Burgas, Daniel; Lank, David B.; Payer, David C.; Loktionov, E. Yu.; Nol, Erica; Kwon, Eunbi; Smith, Fletcher M.; Gates, H. River; Vitnerová, Hana; Prüter, Hanna; Johnson, James A.; Clair, James J. H. St; Lamarre, Jean François; Rausch, Jennie; Reneerkens, Jeroen; Conklin, Jesse R.; Burger, Joanna; Liebezeit, Joe; Bêty, Joël; Coleman, Jonathan T.; Figuerola, Jordi; Hooijmeijer, Jos C.E.W.; Alves, José A.; Smith, Joseph A.; Weidinger, Karel; Koivula, Kari; Gosbell, Ken; Exo, Klaus‐Michael; Niles, Larry; Koloski, Laura; McKinnon, Laura; Praus, Libor; Klaassen, Marcel; Giroux, Marie Andreé; Sládeček, Martin; Boldenow, Megan L.; Goldstein, Michael I.; Šálek, Miroslav; Senner, Nathan R.; Rönkä, Nelli; Lecomte, Nicolas; Gilg, Olivier; Vincze, Orsolya; Johnson, Oscar W.; Smith, Paul A.; Woodard, Paul; Tomkovich, Pavel S.; Battley, Phil F.; Bentzen, Rebecca L.; Lanctot, Richard B.; Porter, Ron; Saalfeld, Sarah T.; Freeman, Scott; Brown, Stephen C.; Yezerinac, Stephen M.; Székely, Tamás; Montalvo, Tomás; Piersma, Theunis; Loverti, Vanessa; Pakanen, Veli Matti; Tijsen, Wim; Kempenaers, Bart

doi:10.1038/nature20563

Cited by 109 publications

(122 citation statements)

References 57 publications

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“…Incubation duration is proximally adjusted by the foraging conditions for incubating adults, nest attentiveness, and microclimate conditions in the nest (Boersma, 1982). Both sandpiper species in our study provide biparental incubation and attend their clutch with high constancy (Bulla, Valcu, Rutten, & Kempenaers, 2014; Bulla et al., 2016), and ambient temperature during the incubation stage was similar between the two decades (Kwon, 2016). One possible mechanism for a biparental species with near‐constant nest attentiveness to shorten the incubation period is through adjusting the heat influx to their eggs while incubating, which has been shown for Arctic‐breeding sanderling ( C. alba , Reneerkens, Grond, Schekkerman, Tulp, & Piersma, 2011).…”

Section: Discussionmentioning

confidence: 98%

Delayed egg‐laying and shortened incubation duration of Arctic‐breeding shorebirds coincide with climate cooling

Kwon

English

Weiser

et al. 2017

Ecology and Evolution

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Biological impacts of climate change are exemplified by shifts in phenology. As the timing of breeding advances, the within‐season relationships between timing of breeding and reproductive traits may change and cause long‐term changes in the population mean value of reproductive traits. We investigated long‐term changes in the timing of breeding and within‐season patterns of clutch size, egg volume, incubation duration, and daily nest survival of three shorebird species between two decades. Based on previously known within‐season patterns and assuming a warming trend, we hypothesized that the timing of clutch initiation would advance between decades and would be coupled with increases in mean clutch size, egg volume, and daily nest survival rate. We monitored 1,378 nests of western sandpipers, semipalmated sandpipers, and red‐necked phalaropes at a subarctic site during 1993–1996 and 2010–2014. Sandpipers have biparental incubation, whereas phalaropes have uniparental incubation. We found an unexpected long‐term cooling trend during the early part of the breeding season. Three species delayed clutch initiation by 5 days in the 2010s relative to the 1990s. Clutch size and daily nest survival showed strong within‐season declines in sandpipers, but not in phalaropes. Egg volume showed strong within‐season declines in one species of sandpiper, but increased in phalaropes. Despite the within‐season patterns in traits and shifts in phenology, clutch size, egg volume, and daily nest survival were similar between decades. In contrast, incubation duration did not show within‐season variation, but decreased by 2 days in sandpipers and increased by 2 days in phalaropes. Shorebirds demonstrated variable breeding phenology and incubation duration in relation to climate cooling, but little change in nonphenological components of traits. Our results indicate that the breeding phenology of shorebirds is closely associated with the temperature conditions on breeding ground, the effects of which can vary among reproductive traits and among sympatric species.

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Section: Discussionmentioning

confidence: 98%

Delayed egg‐laying and shortened incubation duration of Arctic‐breeding shorebirds coincide with climate cooling

Kwon

English

Weiser

et al. 2017

Ecology and Evolution

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“…Although the sampling interval varied from continuous to 30 min sampling between methods (table 3) and populations, as well as within some populations, the incubation variables were independent of sampling interval (table 2 in the Extended Data of [12]). …”

Section: (A) Incubation Rhythms Of Biparental Shorebirdsmentioning

confidence: 99%

“…Specifically, we discuss monitoring methods used to reveal the diversity in incubation rhythms of biparental shorebirds [12] and demonstrate the use of GPS-tracking to derive novel data on diverse foraging activity patterns of raptors [42].…”

Section: Integrating Old and New Approaches To Record Rhythms In The mentioning

confidence: 99%

“…A recent study [12] used an array of monitoring methods (RFIDs, light loggers, GPS-based systems, radio-tags, video recordings and continuous observations; table 4) to reveal unprecedented within-and between-species diversity in incubation rhythms across 729 nests of 91 populations of 32 biparentally incubating shorebird species (figure 1).…”

Section: (A) Incubation Rhythms Of Biparental Shorebirdsmentioning

confidence: 99%

“…For instance, recent telemetry work on arctic shorebirds has revealed unexpected inter-and intra-specific variation in their behavioural rhythms under the continuous daylight of arctic summer [11][12][13], and the combination of automatic radiotelemetry and EEG loggers demonstrated a link between activity and fitness in a polygynous shorebird [14]. Also, combining GPS-tracking, accelerometers and EEG loggers revealed unprecedented sleep-wake cycles of frigatebirds (Fregata minor) flying over the ocean for up to 10 days uninterruptedly [15].…”

Section: Introductionmentioning

confidence: 99%

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Methods in field chronobiology

Dominoni

Åkesson

Klaassen

et al. 2017

Phil. Trans. R. Soc. B

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Chronobiological research has seen a continuous development of novel approaches and techniques to measure rhythmicity at different levels of biological organization from locomotor activity (e.g. migratory restlessness) to physiology (e.g. temperature and hormone rhythms, and relatively recently also in genes, proteins and metabolites). However, the methodological advancements in this field have been mostly and sometimes exclusively used only in indoor laboratory settings. In parallel, there has been an unprecedented and rapid improvement in our ability to track animals and their behaviour in the wild. However, while the spatial analysis of tracking data is widespread, its temporal aspect is largely unexplored. Here, we review the tools that are available or have potential to record rhythms in the wild animals with emphasis on currently overlooked approaches and monitoring systems. We then demonstrate, in three question-driven case studies, how the integration of traditional and newer approaches can help answer novel chronobiological questions in free-living animals. Finally, we highlight unresolved issues in field chronobiology that may benefit from technological development in the future. As most of the studies in the field are descriptive, the future challenge lies in applying the diverse technologies to experimental set-ups in the wild.

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