Effects of environmental variability on different trophic levels of the North Atlantic food web

Paiva, Vítor H.; Geraldes, Pedro; Marques, Vítor; Rodríguez, Rula; Garthe, Stefan; Ramos, Jaime A.

doi:10.3354/meps10180

Cited by 57 publications

(47 citation statements)

References 55 publications

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“…The positive values of SSTa, low Chl a, and low values of the NAO index observed in 2011 may have resulted in lower marine productivity and prey abundance in the North Atlantic (Paiva et al, 2013a;Ramos et al, 2015). In this area, years with a lower NAO index like in 2010/2011 are associated with an unusually strong upwelling along the Portuguese and African coasts.…”

Section: Environmental Factors Influencing Breeding Parametersmentioning

confidence: 98%

“…This has been linked with reductions in prey abundance and availability for North Atlantic summer-breeding seabirds (Paiva et al, 2013a). Values of the environmental predictors (Chl a and SSTa) from inside the 50% kernel utilisation distribution (likely to represent the main foraging area; Paiva et al, 2013a) were extracted within R with the extract function from the raster package (Hijmans and van Etten, 2014).…”

Section: At-sea Distribution and Environmental Variabilitymentioning

confidence: 99%

“…The delayed laying season, greater number of deserted eggs, lower hatching success, chicks' lighter body mass and shorter wings in 2011 compared to 2012 could be related to inter-annual fluctuations in food supply, given the poor oceanographic conditions in 2011, and may have been a consequence of changes in water mass driven by climate and stochastic variation in prey abundance and availability (Neves et al, 2012;Paiva et al, 2013a;Ramos et al, 2015). Availability of food to seabird populations is difficult to measure but is clearly influenced by oceanic conditions within the foraging range of the individuals (e.g., Abrams and Underhill, 1986;Ballance, 2007;Elliott et al, 2008).…”

Section: Environmental Factors Influencing Breeding Parametersmentioning

confidence: 99%

“…In this area, years with a lower NAO index like in 2010/2011 are associated with an unusually strong upwelling along the Portuguese and African coasts. This phenomenon drives fish larvae and plankton offshore and causes their mortality (Santos et al, 2004(Santos et al, , 2007, resulting in low recruitment of small pelagic prey for seabirds (Santos et al, 2004;Paiva et al, 2013a). Selvagens archipelagos .…”

Section: Environmental Factors Influencing Breeding Parametersmentioning

confidence: 99%

“…Annual or medium-term variations in sea surface temperature (SST) and chlorophyll a (Chl a) concentration have been linked to fluctuations in the distribution and reproductive success of seabirds (e.g., Durant et al, 2003;Quillfeldt et al, 2007;Paiva et al, 2013a;Berlincourt and Arnould, 2015) and have generally been analysed in the context of large-scale (spatial and temporal) atmospheric processes such as the El Niño Southern Oscillation (ENSO) in the Pacific Ocean, or the North Atlantic Oscillation (NAO) in the North Atlantic Ocean (e.g., Ramos et al, 2002;Durant et al, 2003;Sandvik et al, 2005). Increasing SST and subsequent higher SST anomalies (SSTa) may block nutrient-rich up-welling zones that can influence primary productivity and impact seabird breeding success through changes in prey availability (Ramos et al, cavities of winter-breeding Procellariiformes appear to be more concealed than nest cavities of summer-breeding species, but this aspect has received very little attention.…”

Section: Introductionmentioning

confidence: 99%

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Breeding biology of a winter-breeding procellariiform in the North Atlantic, the Macaronesian shearwater Puffinus lherminieri baroli

Fagundes¹,

Ramos

et al. 2016

Zoology

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Breeding biology of a winter-breeding procellariiform in the North Atlantic, the Macaronesian shearwater Puffinus lherminieri baroli.Zoology http://dx.doi.org/10. 1016/j.zool.2016.05.014 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.  Climatic stochasticity events have an effect on foraging and breeding success. ABSTRACTThe breeding success of burrow-nesting seabirds may be influenced by both nest site characteristics and oceanographic conditions influencing food availability at sea. In this study we describe the breeding biology of the winter-breeding Macaronesian shearwater (Puffinus lherminieri baroli), including nest site characteristics and interspecific competition. We also evaluate the possible effects of changing oceanographic conditions on breeding phenology and breeding success. The study was carried out over two breeding seasons on two islands in the North Atlantic Ocean, Cima Islet and Selvagem Grande. Oceanographic characteristics differed between years. On a regional scale, the North Atlantic Oscillation (NAO) index was low and negative in 2011, and on a local scale, birds used areas with significantly lower values of chlorophyll a concentration and significantly higher values of sea surface temperature anomalies.Hatching success was higher in 2012 than in 2011. At both colonies, egg cracking was the main cause of hatching failure, but in 2011 several eggs on Selvagem Grande were deserted. In 2012 birds laid earlier and chicks had longer wings and were heavier. At both colonies, nests that were deeper, were sheltered from prevailing winds and had small chambers and a soil substrate had a higher probability of being used successfully by the birds. Nests occupied solely by Macaronesian shearwaters were much deeper and had less volume than nests shared with other species. Our study suggests that the breeding success of Macaronesian shearwaters is strongly related to nest site characteristics and that at-sea environmental conditions exert a strong influence on reproductive parameters, with birds breeding in a poor year (evaluated in terms of lower marine productivity) laying much later and their chicks growing at a slower rate than in a good year. The influence of nest site characteristics and environmental conditions may be very important for understanding the breeding ecology of Procellariiformes and may help explain the negative population trend of Macaronesian shearwaters.

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Section: Environmental Factors Influencing Breeding Parametersmentioning

confidence: 98%

Section: At-sea Distribution and Environmental Variabilitymentioning

confidence: 99%