Open Access
Translator Disclaimer
1 July 2014 Climate Change and Advanced Primary Moult in Eurasian Golden Plovers Pluvialis apricaria
Joop Jukema, Popko Wiersma
Author Affiliations +

We measured primary moult scores of 1051 Eurasian Golden Plovers Pluvialis apricaria staging in pastures in The Netherlands from 1978 to 2011. We hypothesized that moult may have advanced due to earlier breeding resulting from global climate change. At the same time, intensification of agricultural practices has changed the environment on which the Golden Plovers depend during migration and staging, which may have affected their condition and moult schedule.

Primary moult has advanced by 8 days from 1990 to 2011, without visible changes preceding 1990. This suggests that long-term changes in weather might have caused the change in moult timing. In the absence of the variable year, the North Atlantic Oscillating (NAO) index, averaged over September–October, significantly correlated with timing of moult. However, this was a weaker relationship than that of year and timing of moult. Apparently, year correlates better with relevant weather parameters than NAO. Because moult speed at the staging areas has not changed from 1978 to 2011, the birds must have started moult earlier. Advanced breeding has been shown to have occurred in several bird species breeding in northern temperate latitudes. Golden Plovers start to moult during breeding, and therefore we think that the advancement of moult has been the result of an earlier start of breeding and not of changes in agricultural practice in The Netherlands.

Many animals living in seasonal environments move between geographically distinct breeding and nonbreeding areas, tracking optimal weather or food conditions or avoiding high predation risks. It may be expected that changes in the environment will affect the timing of such events, due to altered availability of resources or simply due to changes in timing of preceding life-cycle stages (Carey 2009, Barshep et al. 2011). During the last few decades, the earth's climate has changed significantly (Møller et al. 2010). At the same time, major changes have occurred in agricultural landscapes in western Europe through the intensification of farming practices. In many cases this has come at the demise of natural values and biodiversity (Fuller et al. 1995; Robinson & Sutherland 2002; Wretenberg et al. 2006). Because the timing of life-history events is influenced by environmental factors, such as weather, food availability and predation pressure, many changes may have occurred in the phenology of migratory species during the last few decades, especially those species heavily relying on agricultural areas.

We analysed timing of moult of primary feathers in Eurasian Golden Plovers Pluvialis apricaria, hereafter referred to as Golden Plover, systematically collected in The Netherlands during a period of 34 years. Golden Plovers depend on pastures and arable fields during migration and wintering (Jukema et al. 2001; Lindström 2010). They breed from south-eastern Greenland to the Khatanga River in western Siberia and those staging and wintering in The Netherlands originate mainly from Fennoscandia and NW Russia, although a significant proportion is made up of birds from further east, up to western Siberia (Speek & Speek 1984, Jukema et al. 2001, Piersma et al. 2005). The species is monotypic and no geographically distinct populations are recognised (Byrkjedal & Thompson 1998).

The birds arrive in staging areas in north-western Europe in early August. Depending on the severity of winter, large numbers winter in those areas or move further south, mainly to northern France. In The Netherlands, numbers peak in October–November (Kleefstra et al. 2009) and again in March ( 2012). Occasional counts, organised between 1976 and 2008, showed that numbers ranged roughly between 200,000 and 400,000 birds (Bijlsma et al. 2001, Kleefstra et al. 2014). Large numbers are present on pastures and, to a lesser extent, on arable fields (Gillings et al. 2007, Kleefstra et al. 2014), where they feed on various subterranean prey, in particular earthworms (Lumbricidae; Cramp & Simmons 1983, Thompson & Barnard 1984, Gillings & Sutherland 2007), but in the 1980s a shift seems to have occurred from inland, agricultural areas to marine coastal areas (Kleefstra et al. 2014). Potentially, these birds still feed inland, but only aggregate to roost on the Wadden Sea coast. Alternatively, growing numbers may feed on intertidal mudflats, but unfortunately relevant data is anecdotal (Gillings et al. 2006). From May until July the birds are virtually absent from The Netherlands.

Golden Plovers are exceptional, although not unique, among migratory birds in that they start wing moult during breeding to complete it in autumn in staging or wintering areas (Byrkjedal & Thompson 1998, Jukema et al. 2001). Birds usually do not moult flight feathers during breeding, which may either be due to the predation risks it could incur or due to the high energetic or nutritious costs of both moult and reproduction precluding their simultaneous occurrence (Hoye & Buttemer 2011). Apparently, Golden Plovers can afford to start wing moult during breeding, which may be due to low predation risks or sufficient energy reserves. Timing of breeding of Golden Plovers depends partly on spring temperature (Pearce-Higgins et al. 2005), and during the last few decades spring and summer temperatures have increased significantly in the northern hemisphere (Møller et al. 2010) while evidence is mounting that many bird species have advanced their laying dates in response to this temperature change (Dunn & Winkler 2010). We predict that the increase in temperature has advanced the timing of breeding of Golden Plovers and thereby their moult schedule. In the meantime, agricultural intensification has led to decreasing numbers of breeding meadow birds (Donald et al. 2001, Donald et al. 2006); partly due to effects on food availability (Newton 2004, Kleijn et al. 2011). Many of the same factors affecting breeding meadow birds may impair foraging conditions of staging and wintering Golden Plovers. We hypothesize that this may have resulted in slower moulting of primary feathers.


Golden Plovers were caught in pastures on the mainland of the northwest of the province of Fryslân, in the north of The Netherlands, as well as on the island of Terschelling, 50–80 km north of the mainland catching sites. Birds were caught using wilsternets - a centuries old catching technique that relies on a catcher using a flute and decoys to draw birds to a large clap net that is pulled over when birds are landing (Jukema et al. 2001). We analysed data from 1051 birds that were caught between 1978 and 2011 on 65 successful catching days between 2 August and 2 October. Per successful day between 2 and 81 adult birds were caught and measured. The extent of primary moult was assessed by measuring the length of each of the 10 primary feathers on an ordinal scale ranging from 0 to 5, where 0 indicates the presence of an old feather, 1 indicates the absence of a feather where an old feather has been shed to make room for a new one, and 5 the presence of a fully grown new feather (Ginn & Melville 1983). The moult score is the summed scores of the 10 primaries of one wing, therefore ranging between 0 and 50. Left and right wing moult symmetrically. Sexes cannot be distinguished based on biometrics (Jukema & Piersma 1992, Byrkjedal & Thompson 1998). Onset of primary moult can be earlier in males as Yalden & Pearce-Higgins (2002) showed in a population in the UK, but this does not seem to be a general pattern, as Byrkjedal (1978) did not detect sex differences in Norway. Birds were ringed with metal rings and immediately released after measuring. Primary moult score increases faster in the early stages of moult (Henriksen 1985), but in the range of moult scores contained in our data, scores proceeded linearly with time. All analyses were performed on adult birds of one year old or older.

Data on snow cover in the breeding areas is not available for this time span. We used the North Atlantic Oscillation (NAO) index as a covariate in our analyses because the index is correlated with weather parameters over a wide area in the northern hemisphere (Hurrell 1995, Sanz 2003). The mean index of September to November (NAOSON) is correlated with the onset and period of continuous snow cover in northern Norway, while the mean index of December to February (NAODJF) correlates with snow depth (Theakstone 2013). The index for May (NAOM) was used because it coincides with the start of the breeding season.


Data were analysed using Generalised Linear Models (GLMs) in SPSS (v.22, IBM Corp.). Because normality tests tend to be overly conservative with large data sets, the distributions of residual values were visually inspected and found to follow a distribution close to normality but negatively skewed. Because of this nonparametric distribution of the data, we used bootstrapping to estimate model parameters and robust estimates of the covariance matrix (also called Huber/ White/sandwich estimates) which provide consistent estimates of the covariance, correcting the covariance matrix for model misspecification and sampling design. Models were compared using the Akaike Information Criterion (AIC). All statistics are shown ±1 SE.


Primary moult was scored for 1051 birds and scores ranged between 9 and 50 with a mean of 36.5 ± 0.2 and a median value of 37.0. We tested models with arrangements of the variables year, NAO and day number as predicting variables (Table 1). The best model included year, day and year-squared. Adding the interaction of year and day did not significantly improve the fit with moult score. Adding NAO in the presence of year also did not improve estimates of moult scores and NAO without year made worse predictions of moult score. Moult scores increased by an average of 0.35 ± 0.01 per day and also increased with year: from 1977, each year moult scores were on average 0.08 ± 0.01 higher. The yearly increase was not linear but accelerating (Figure 1), as shown by the significant, positive year-squared variable (Table 1). This resulted in no discernible differences in moult scores from 1977 to 2000, but an increase with, on average, 0.25 per year during the last decade (Figure 2). Assuming that moult score increased linearly through time, start of moult - when moult score equals 0 - would be around 26 May in the first two decades and 18 May in 2011. Completion of moult - when moult score equals 50 - is estimated to be around 15 October in the first two decades and 7 October in 2011. Note that in reality moult scores do not change linearly at the start and end of moult, which introduces a bias in these estimates. Moult duration estimated in this way was 142 days and would not have changed through the years.

Figure 1.

Average moult scores (±SE) per day in the course of a year, based on catches between 1977 and 2011.


Table 1.

Results of GLM analysis relating moult score with Year, North Atlantic Oscillation indices and Day of the year, showing parameter estimates, standard errors and P-values of all significant variables after backward deletion of non-significant variables and their interaction terms. Akaike's Information Criterion (AIC) is a measure of model fit and is used to compare models.


Figure 2.

Predicted moult scores per year adjusted to the average catching date, i.e. 24 August, following model 2 shown in Table 1.



Primary moult in Golden Plovers caught in The Netherlands has advanced by 8 days from 1990 to 2011, while there was no change in timing of moult during the preceding 12 years (Figures 1, 2). There has not been a shift in the speed of moult and therefore we assume that the start of moult gradually shifted to an earlier date in later years. Primary moult starts in the breeding areas, even during incubation (Byrkjedal & Thompson 1998), and we hypothesize that earlier moulting is an effect of earlier breeding. Because moult scores increase faster early during moult and because moult can be interrupted, we cannot predict the actual starting date of moult from our data. Indeed, over a wide geographical range, moulting started late June to early July (Byrkjedal 1978), which is at least a month later than the date estimated by extrapolating from our sample. This is in accordance with our estimate of moult duration, which is at least two weeks longer than what is indicated by more comprehensive analyses (Henriksen 1985; P. Machin unpubl. data).

No direct evidence is available of advanced breeding in Golden Plovers from Fennoscandia or Russia, but several findings indicate that it is likely to have occurred. During the last decades, spring snow cover has diminished in the northern hemisphere (Møller et al. 2010), affecting availability of nesting and feeding sites (Høye et al. 2007, Rakhimberdiev et al. 2007), and many Arctic birds arrive earlier in their breeding areas (Høye et al. 2007, Huntley et al. 2007). In Iceland, Golden Plovers arrived 0.43 d earlier each year from 1988 to 2009, and this pattern was correlated with mean local temperature (Gunnarsson & Tómasson 2011). In the period 1978–2000, spring arrival in northern Norway has advanced by almost 8 days (Barrett 2002), which suggests that the start of the breeding season has shifted likewise. In The Netherlands, south of the Golden Plovers' breeding range, another member of the Charadridae, the Northern Lapwing Vanellus vanellus, advanced laying by 10 days from 1950 to 2003 in response to increasing spring temperatures (Both et al. 2005). Although we used NAO as an integrated measure of weather conditions in the breeding range in our analyses, correlations with weather conditions vary spatially across northern Europe (Sæther et al. 2003). This variation may have weakened correlations with NAO. As a case in point, in the mountains of the Scandinavian Peninsula, winter precipitation has increased leading to later snow melt and probably later breeding (Byrkjedal pers. com.).

Apart from the availability of snow-free areas for breeding and feeding, advanced breeding may also result from earlier emergence of invertebrate prey. Pearce-Higgins et al. (2005) showed that Golden Plovers breeding in the northern UK advanced hatching by 6 days from the 1980s to the 1990s in response to the earlier emergence of crane fly (Tipulidae) larvae. Although British birds do not migrate to The Netherlands, similar processes are likely to occur in northern Scandinavia and Russia. On the Taymir Peninsula, in the Siberian Arctic, arthropod abundance is predicted to have advanced by 7 days from 1973 to 2003 (Tulp & Schekkerman 2008), which would lead to an earlier optimal hatching date of Arctic breeding waders. Advanced insect abundance in the breeding areas could also lead to an earlier start of moult in the absence of advanced breeding, if food availability triggers the start of moult. A functional connection between moult and breeding is therefore difficult to discern.

During the recent decades, post-breeding, staging Golden Plovers have redistributed to some degree over Europe, with higher numbers lingering on closer to the breeding areas (e.g. Sweden, Poland and Denmark; Jukema et al. 2001, Kleefstra et al. 2014). Apart from changing temperatures, this may also have been an effect of decreasing hunting pressure (Jukema et al. 2001). This would only have had an effect on the average moult stages we find in The Netherlands if birds with different timing of moult redistributed differently, and there is no indication that this occurs.

Based on the examples above, in combination with our finding of advanced wing moult, we conclude that Golden Plovers probably started breeding earlier during the last few decades in response to increasing spring temperatures, and that this has led to advanced moulting. But may the simultaneously occurring agricultural intensification in staging areas also have affected moult? During the last decades, grassland habitat has shrunk and farmers have created extensive monocultures of rye grasses Lolium spec., while water tables have been lowered to enable more frequent fertilisation and mowing (Donald et al. 2001). While this has had strong negative effects on most bird species breeding in farmland (Newton 2004, Donald et al. 2006, Kleijn et al. 2010), effects on birds that are staging or wintering in pastures or on arable fields might be different (Lindström et al. 2010). Fertilisation may actually lead to increased availability of earthworms in grassland (Standen 1984, Curry et al. 2008), thereby positively affecting staging or wintering birds, such as Golden Plovers (Atkinson et al. 2005). Moult speed, however, has not changed in the staging birds, implying that changes in agricultural practises have had no effect on moult.


JJ is grateful for the assistance of the late Durk Posthumes who over many years shared his knowledge and experience of ‘wilsterflappen’, the traditional method for catching Golden Plovers. Maurine Dietz, Theunis Piersma and Ingrid Tulp provided helpful information. We like to thank Ingvar Byrkjedal and Lucie Schmalz for commenting on an early draft of the manuscript.



P.W. Atkinson , R.J. Fuller , J.A. Vickery , G.J. Conway , J.R.B. Tallowin , R.E.N. Smith , K.A. Haysom , T.C. Ingst , E.J. Asteraki & V.K. Brown 2005. Influence of agricultural management, sward structure and food resources on grassland field use by birds in lowland England. J. Appl. Ecol. 42: 932–942. Google Scholar


R.T. Barrett 2002. The phenology of spring bird migration to north Norway. Bird Study 49: 270–277. Google Scholar


Y. Barshep , C. Minton , L.G. Underhill & M. Remisiewicz 2011. The primary moult of Curlew Sandpipers Calidris ferruginea in North-Western Australia shifts according to breeding success. Ardea 99: 43–51. Google Scholar


R.G. Bijlsma , F. Hustings & C.J. Camphuysen 2001. Common and scarce birds of the Netherlands. KNNV Uitgeverij, Utrecht. (In Dutch with English summary) Google Scholar


C. Both , T. Piersma & M. Roodbergen 2005. Climatic change explains much of the 20th century advance in laying date of Northern Lapwing Vanellus vanellus in The Netherlands. Ardea 93: 79–88. Google Scholar


I. Byrkjedal 1978. Altitudinal differences in breeding schedules of Golden Plovers Pluvialis apricaria in South Norway. Sterna 17: 1–20. Google Scholar


I. Byrkjedal & D. Thompson 1998. Tundra plovers: The Eurasian, Pacific and American Golden Plovers and Grey Plover. Princeton University Press, Princeton. Google Scholar


C. Carey 2009. The impacts of climate change on the annual cycles of birds. Phil. Trans. R. Soc. B. 364: 3321–3330. Google Scholar


S. Cramp & K.E.L. Simmons 1983. The birds of the western Palearctic, Vol. III: Waders to gulls. Google Scholar


J.P. Curry , P. Doherty , G. Purvis & O. Schmidt 2008. Relationships between earthworm populations and management intensity in cattle-grazed pastures in Ireland. Appl. Soil Ecol. 39: 58–64. Google Scholar


P.F. Donald , R.E. Green & M.F. Heath 2001. Agricultural intensification and the collapse of Europe's farmland bird populations. Proc. R. Soc. B 268: 25–29. Google Scholar


P.F. Donald , F.J. Sanderson , I.J. Burfield & F.P.J. van Bommel 2006. Further evidence of continent-wide impacts of agricultural intensification on European farmland birds, 1990–2000. Agricult. Ecosyst. & Environm. 116: 189–196. Google Scholar


P.O. Dunn & D.W. Winkler 2010. Effects of climate change on timing of breeding and reproductive success in birds. In: A.P. Møller , W. Fiedler & P. Berthold (eds) Effects of Climate Change on Birds. Oxford University Press, Oxford, pp. 113–128. Google Scholar


R.J. Fuller , R.D. Gregory , D.W. Gibbons , J.H. Marchant , J.D. Wilson , S.R. Baillie & N. Carter 1995. Population declines and range contractions among lowland farmland birds in Britain. Conserv. Biol. 9: 1425–1441. Google Scholar


S. Gillings & W.J. Sutherland 2007. Comparative diurnal and nocturnal diet and foraging in Eurasian Golden Plovers Pluvialis apricaria and Northern Lapwings Vanellus vanellus wintering on arable farmland. Ardea 95: 243–257. Google Scholar


S. Gillings , G.E. Austin , R.J. Fuller & W.J. Sutherland 2006. Distribution shifts in wintering Golden Plover Pluvialis apricaria and Lapwing Vanellus vanellus in Britain. Bird Study 53: 274–284. Google Scholar


S. Gillings , R.J. Fuller & W.J. Sutherland 2007. Winter field use and habitat selection by Eurasian Golden Plovers Pluvialis apricaria and Northern Lapwings Vanellus vanellus on arable farmland. Ibis 149: 509–520. Google Scholar


H.B. Ginn & D.S. Melville 1983. Moult in birds. BTO Guide 19. BTO, Thetford, UK. Google Scholar


T.G. Gunnarsson & G. Tómasson 2011. Flexibility in spring arrival of migratory birds at northern latitudes under rapid temperature changes. Bird Study 58: 1–12. Google Scholar


K. Henriksen 1985. Postnuptial moult of flight feathers in Golden Plovers Pluvialis apricaria. Dansk Ornithol. Foren. Tidsskr. 79: 141–150. (In Danish). Google Scholar


B.J. Hoye & W.A. Buttemer 2011. Inexplicable Inefficiency of avian molt? Insights from an opportunistically breeding arid-zone species, Lichenostomus penicillatus. PLoS ONE 6: e16230. Google Scholar


T.T. Høye , E. Post , H. Meltofte , N.M. Schmidt & M.C. Forchhammer 2007. Rapid advancement of spring in the High Arctic. Current Biol. 17: R449–R451. Google Scholar


B. Huntley , R.E. Green , Y. Collingham & S.G. Willis 2007. A climatic atlas of European breeding birds. Durham University, RSPB and Lynx Edicions, Durham, Sandy and Barcelona. Google Scholar


J.W. Hurrell 1995. Decadal trends in the North Atlantic Oscillation: regional temperatures and precipitation. Science 269: 676–679. Google Scholar


J. Jukema & T. Piersma 1992. Golden Plovers Pluvialis apricaria do not show sexual dimorphy in external and internal linear dimensions. Limosa 65: 147–154. Google Scholar


J. Jukema , T. Piersma , J.B. Hulscher , E.J. Bunskoeke , A. Koolhaas & A. Veenstra 2001. Goudplevieren en wilsterflappers - eeuwenoude fascinatie voor trekvogels. [Golden plovers and wilsternetters: a deeply rooted fascination with migrating birds]. Fryske Akademy/KNNV Uitgeverij, Ljouwert/Utrecht. (In Dutch with English summary) Google Scholar


R. Kleefstra , E. van Winden & M. van Roomen 2009. Binnenlandse steltlopertellingen in Nederland: toelichting op gegevens van landelijke tellingen in oktober en november 2008. SOVON-informatierapport 2009/14. Google Scholar


R. Kleefsta , M. van Roomen , E. van Winden & D. Tanger 2014. Eurasian Golden Plovers Pluvialis apricaria and Northern Lapwings Vanellus vanellus in the Netherlands: trends in numbers and distribution since the 1970s. Limosa 87: 20–32. (In Dutch with English summary) Google Scholar


D. Kleijn , H. Schekkerman , W.J. Dimmers , R.J.M. van Kats , D. Melman & W.A. Teunissen 2010. Adverse effects of agricultural intensification and climate change on breeding habitat quality of Black-tailed Godwits Limosa l. limosa in The Netherlands. Ibis 152: 475–486. Google Scholar


D. Kleijn , D. Lammertsma & G. Müskens 2011. The importance of water level and fertilizer for food availability of meadow birds. In: W.A. Teunissen & E. Wymenga (eds) Factors affecting the development of meadow bird populations. Important factors during migration, influence of water level on food availability and vegetation structure on chick survival. Sovon Vogelonderzoek Nederland, Bureau Altenburg & Wymenga, Alterra, Nijmegen, Veenwouden, Wageningen, pp. 41–60. (In Dutch) Google Scholar


Å. Lindström , J. Dänhardt , M. Green , R.H.G. Klaassen & P. Olsson 2010. Can intensively farmed arable land be favourable for birds during migration? The case of the Eurasian golden plover Pluvialis apricaria. J. Avian Biol. 41: 154–162. Google Scholar


A.P. Møller , W. Fiedler & P. Berthold 2010. Introduction. In: A.P. Møller , W. Fiedler , & P. Berthold (eds) Effects of climate change on birds. Oxford University Press, Oxford, pp. 3–8. Google Scholar


I. Newton 2004. The recent declines of farmland bird populations in Britain: an appraisal of causal factors and conservation actions. Ibis 146: 579–600. Google Scholar


J.W. Pearce-Higgins , D.W. Yalden & M.J. Whittingham 2005. Warmer springs advance the breeding phenology of golden plovers Pluvialis apricaria and their prey (Tipulidae). Oecologia 143: 470–476. Google Scholar


T. Piersma , K.G. Rogers , H. Boyd , E.J. Bunskoeke & J. Jukema 2005. Demography of Eurasian Golden Plovers Pluvialis apricaria staging in The Netherlands. Ardea 93: 49–64. Google Scholar


E.N. Rakhimberdiev , A.Y. Soloviev , V.V. Golovnyuk & T.V. Sviridova 2007. The influence of snow cover on selection of nesting grounds by Charadrii waders in south-eastern Taimyr Peninsula. Zool. Zhurn. 86: 1490–1497. Google Scholar


R.A. Robinson & W.J. Sutherland 2002. Post-war changes in arable farming and biodiversity in Great Britain. J. Appl. Ecol. 39: 157–176. Google Scholar


B.-E. Sæther , S. Engen , A.P. Møller , E. Matthysen , F. Adriaensen , W. Fiedler , A. Leivits , M.M. Lambrechts , M.E. Visser , T. Anker-Nilssen , C. Both , A.A. Dhondt , R.H. McCleery , J. McMeeking , J. Potti , O.W. Røstad & D. Thomson 2003. Climate variation and regional gradients in population dynamics of two hole-nesting passerines. Proc. R. Soc. Lond.: Biol. Sc. 270: 2397–2404. Google Scholar


J.J. Sanz 2003. Large-scale effect of climate change on breeding parameters of pied flycatchers in Western Europe. Ecography 26: 45–50. Google Scholar


B.J. Speek & G. Speek 1984. Thieme's bird migration atlas. Thieme, Zutphen. (In Dutch) Google Scholar


V. Standen 1984. Production and diversity of enchytraeids, earthworms and plants in fertilized hay meadow plots. J. Appl. Ecol. 21: 293–312. Google Scholar


W.H. Theakstone 2013. Long-term variations of the seasonal snow cover in Nordland, Norway: the influence of the North Atlantic Oscillation. Ann. Glaciol. 54: 25–34. Google Scholar


D.B.A. Thompson & C.J. Barnard 1984. Prey selection by plovers: optimal foraging in mixed-species groups. Animal Behav. 32: 554–563. Google Scholar


I. Tulp & H. Schekkerman 2008. Has prey availability for Arctic birds advanced with climate change? Hindcasting the abundance of tundra arthropods using weather and seasonal variations. Arctic 61: 48–60. Google Scholar

45. 2012. Goudplevier - Pluvialis apricaria. Accessed February 2012. Google Scholar


J. Wretenberg , Å. Lindström , S. Svensson , T. Thierfelder & T. Pärt 2006. Population trends of farmland birds in Sweden and England: similar trends but different patterns of agricultural intensification. J. Appl. Ecol. 43: 1110–1120. Google Scholar


D.W. Yalden & J.W. Pearce-Higgins 2002. Biometrics and moult of breeding Eurasian Golden Plovers Pluvialis apricaria. Wader Study Group Bull. 98: 50. Google Scholar



In het najaar van 1978–2011 hebben wij in de provincie Fryslân van 1051 Goudplevieren Pluvialis apricaria de ruiscore van de grote slagpennen bepaald (0 = alle tien slagpennen oud, 50 = alle slagpennen nieuw). De vogels foerageren hier tijdens de trek en gedurende de winter op grasland. We hebben getoetst of de timing van de rui in de loop van de jaren is veranderd en, zo ja, of dit een gevolg zou kunnen zijn van klimaatverandering of door de intensivering van de landbouw wat het biotoop van doortrekkende en overwinterende Goudplevieren heeft veranderd. Uit onze metingen blijkt dat sinds 1990 een bepaalde ruiscore van de grote slagpennen acht dagen eerder in het jaar wordt bereikt dan in de jaren hiervoor. Omdat in die jaren de snelheid waarmee de veren worden vervangen niet is veranderd, nemen we aan dat de vogels in de loop van de tijd eerder met de rui zijn begonnen. Goudplevieren beginnen al tijdens het broeden te ruien en daarom denken we dat de vervroeging van de rui mogelijk een gevolg is van een vroegere start van het broedseizoen sinds 1990. In de gematigde en noordelijke streken is voor verschillende soorten aangetoond dat die in de afgelopen decennia eerder zijn gaan broeden. We vonden ook een correlatie met de Noord-Atlantische Oscillatie-index (NAO), die verband houdt met grootschalige weerpatronen op het noordelijke halfrond. Dit is een aanwijzing dat lange termijn veranderingen in het weer de oorzaak zouden kunnen zijn van de vervroegde rui. Bovenop het effect van de factor ‘jaar’ leverde de factor ‘NAO’ echter geen verbetering van de voorspelling van de timing van de rui op. Blijkbaar correleert de factor ‘jaar’ beter met relevante weersvariabelen dan de factor ‘NAO’. Omdat de snelheid van de rui niet is veranderd, zijn er geen aanwijzingen dat de intensivering van de landbouw een effect heeft gehad op het ruiproces.

Joop Jukema and Popko Wiersma "Climate Change and Advanced Primary Moult in Eurasian Golden Plovers Pluvialis apricaria," Ardea 102(2), 153-160, (1 July 2014).
Received: 28 August 2013; Accepted: 15 October 2014; Published: 1 July 2014

advanced breeding
agricultural intensification
migratory stop-over
North Atlantic Oscillation
wing moult
Get copyright permission
Back to Top