Drought in Africa Caused Delayed Arrival of European Songbirds

Tøttrup, Anders P.; Klaassen, Raymond H. G.; Willemoes, Mikkel; Strandberg, Roine; Vardanis, Yannis; Lindström, Åke; Rahbek, Carsten; Alerstam, Thomas; Thorup, Kasper

doi:10.1126/science.1227548

Cited by 152 publications

(187 citation statements)

References 9 publications

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“…Differences in fundamental niches alone are insufficient to explain, for instance, the striking differences, in some cases, between the wintering grounds and migration routes of closely related species, such as found in Ficedula flycatchers [8,9] and Luscinia nightingales [10,11]. Such patterns could be caused by different population histories (potentially explaining why birds circumvent the Mediterranean via the eastern or the western flyway) or competitive exclusion.…”

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confidence: 97%

Annual spatiotemporal migration schedules in three larger insectivorous birds: European nightjar, common swift and common cuckoo

Jacobsen

Jensen²,

Willemoes

et al. 2017

Anim Biotelemetry

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Background: Knowledge of spatiotemporal migration patterns is important for our understanding of migration ecology and ultimately conservation of migratory species. We studied the annual migration schedules of European nightjar, a large nocturnal insectivore and compared it with two other larger migratory insectivores, common swift and common cuckoo. All species breed in North Europe and winter in sub-Saharan Africa, but estimating their spatiotemporal non-breeding distributions from observations is complicated by the occurrence of similar local African species. We used geolocators to track the annual migrations of nightjars and swifts and compared these with satellite tracking of cuckoo migration.Results: Individuals of the three species migrated to wintering grounds centered in Central Africa, except some common swifts that remained in West Africa, crossing or circumventing the Sahara along different routes in spring and fall. Overall, all species showed similar regional and seasonal use of several stopover areas during migration. Among the three species, European nightjars and common cuckoos showed the most similar spatiotemporal migration patterns. The nightjars wintered in SW Central Africa and breeding and wintering made up by far the two longest stationary periods. Swifts were generally more mobile, and some individuals progressively visited areas further east in East Africa during winter and further west in West Africa on spring migration; this species also spent less time on stopovers, but more on wintering areas. Cuckoos were intermediate in their extent of movements. The speed of nightjar spring migration was equal to that of fall migration, in contrast to the two other species where spring return to breeding areas was faster. Conclusions: Ecological requirements are potentially useful for understanding spatiotemporal migration patterns and causes of declines in migratory species.

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confidence: 97%

Annual spatiotemporal migration schedules in three larger insectivorous birds: European nightjar, common swift and common cuckoo

Jacobsen

Jensen²,

Willemoes

et al. 2017

Anim Biotelemetry

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“…Impacts include loss of life, crop failures and food shortages, health issues, and mass migration [1] and the consequences on society and the environment are far reaching. For example, Tøttrup et al [2] have reported the impact of drought at the Horn of Africa on the phenology of the songbirds' migrations to Europe. The environmental effects of droughts in Amazonia, a very humid region, have included forest fires, reductions of biomass, and forest mortality [3].…”

Section: Introductionmentioning

confidence: 99%

Water Availability of São Francisco River Basin Based on a Space-Borne Geodetic Sensor

Sun

Ferreira

et al. 2016

Water

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Brazil has recently experienced one of its worst droughts in the last 80 years, with wide-ranging consequences for water supply restrictions, energy rationing, and agricultural losses. Northeast and Southeast Brazil, which share the São Francisco River basin (SFRB), have experienced serious precipitation reduction since 2011. We used terrestrial water-storage (TWS) fields, inverted from the Gravity Recovery and Climate Experiment (GRACE) mission measurements, to assess and quantify the ongoing drought over the SFRB. We found a water loss rate of 3.30 km 3 /year over the time-span of April 2002 to March 2015. In addition, the TWS drought index (TWSDI) showed the extension of the recent drought that has jeopardized the SFRB since January 2012, and which reached its maximum in July 2015 (the end of TWS time series). In this sense there seems to be a linkage between the TWSDI (wetness/dryness) and the El Niño Southern Oscillation (ENSO), in terms of the wavelet coherence, at the semi-annual and biennial bands, suggesting a relationship between the two. While acknowledging that further investigation is needed, we believe that our findings should contribute to the water management policies by quantifying the impact of this drought event over the SFRB.

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“…There is an urgent and dire need to progress on various fronts of drought mitigation such as early warning and forecasting, building the resilience of the societies, shortterm relief efforts, long-term planning and capacity building (e.g. Calow et al, 2010;Clarke et al, 2012;Dondero, 1985;Falkenmark and Rockström, 2008;GFDRR, 2011;IFAD, 2010IFAD, , 2011aLogar and van den Bergh, 2013;Mishra and Singh, 2010;Msangi, 2004;Sehmi and Kundzewicz, 1997;Tadesse et al, 2008;Tøttrup et al, 2012;UNISDR, 2004UNISDR, , 2010Vicento-Serrano et al, 2012;Vogel et al, 2010;World Bank and GFDRR, 2010).…”

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confidence: 99%

A review of droughts on the African continent: a geospatial and long-term perspective

Masih

Maskey

Mussá

et al. 2014

Hydrol. Earth Syst. Sci.

520

250

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Abstract. This paper presents a comprehensive review and analysis of the available literature and information on droughts to build a continental, regional and country level perspective on geospatial and temporal variation of droughts in Africa. The study is based on the review and analysis of droughts occurred during 1900-2013, as well as evidence available from past centuries based on studies on the lake sediment analysis, tree-ring chronologies and written and oral histories and future predictions from the global climate change models. Most of the studies based on instrumental records indicate that droughts have become more frequent, intense and widespread during the last 50 years. The extreme droughts of

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Drought in Africa Caused Delayed Arrival of European Songbirds

Cited by 152 publications

References 9 publications

Annual spatiotemporal migration schedules in three larger insectivorous birds: European nightjar, common swift and common cuckoo

Annual spatiotemporal migration schedules in three larger insectivorous birds: European nightjar, common swift and common cuckoo

Water Availability of São Francisco River Basin Based on a Space-Borne Geodetic Sensor

A review of droughts on the African continent: a geospatial and long-term perspective

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