Centurial and decadal oceanographic influences on changes in northern gannet populations and diets in the north-west Atlantic: implications for climate change

Montevecchi, William A.; Myers, Ransom A.

doi:10.1006/jmsc.1997.0265

Cited by 136 publications

(88 citation statements)

References 19 publications

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“…Herring and mackerel are very common food items of the gannet in the core of its distribution and recently also in northern Norway (Nelson 2002;Barrett 2016) such that their northward expansion made way for the opportunistic spread of the gannet to Bjørnøya. This mirrors the recolonization by gannets of Funk Island, off Newfoundland, in the 1930s and the establishment of new gannet colonies in eastern Iceland in the 1940s when mackerel appeared off the coasts during periods of warm water (Gudmundsson 1953;Montevecchi & Myers 1997;Astthorsson et al 2012;Freydis Vigfúsdottir, pers. comm.).…”

Section: Discussionmentioning

confidence: 80%

On the polar edge: the status of the northern gannet (Morus bassanus) in the Barents Sea in 2015-16

Barrett

Strøm

Melnikov³

2017

Polar Research

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Section: Discussionmentioning

confidence: 80%

On the polar edge: the status of the northern gannet (Morus bassanus) in the Barents Sea in 2015-16

Barrett

Strøm

Melnikov³

2017

Polar Research

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“…For example, changes in population size or reproductive ecology of seabirds may in some circumstances reflect changes in prey availability (Vader et al 1990, Hunt et al 1991, Montevecchi & Myers 1997. Their role as indicators is enhanced by their longevity, mobility, large accessible populations and response to anomalies , Ainley et al 1996.…”

Section: Introductionmentioning

confidence: 99%

Changes in sooty shearwater Puffinus griseuschick production and harvest precede ENSO events

Lyver¹,

Møller²,

Thompson³

1999

Mar. Ecol. Prog. Ser.

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A large-scale decline in the population of an apex marine predator, the sooty shearwater Puffinus griseus, in the North Pacific was corroborated by decreased harvest rates of a muttonbirder between 1979 and 1998 in New Zealand. Between 1989 and 1998 harvest rates decreased by 47% in the nanao (burrow prospecting) period and 42% in the rama (nightly capture of emerging chicks) period. The number of muttonbirders harvesting on Poutama lsland decreased over the 20 yr as chicks became scarcer, suggesting that the harvest is potent~ally self-regulating. Chlck abundance on an u n h a~e s t e d island also declined over the last decade, suggesting that harvest was not a sufficient sole cause for the decline. Changes in harvest rates and burrow occupancies between successive years significantly predicted the direction and intensity of Southern Oscillation and sea-surface temperature anomalies in the following 12 mo. Climatic perturbations may affect food availabi.lity, predominant wind charactenstics, direct and indirect fishery pressure and PCB/DDE redistribution in sooty shearwaters.

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“…In the 90s some papers started to highlight the potential impact of climate warming on seabirds (Burger, 1990;Brown, 1991;Duffy, 1993) and the role played by climate on bottom-up control mechanisms, food availability and its effects on seabird population dynamics (Crawford, 1991;Ainley et al, 1994). Nevertheless, it was not until the end of the 90s that the literature on climate and seabirds exponentially increased (Montevecchi and Myers, 1997;Guinet et al, 1998;Lyver et al, 1999) (see Figure 1) and that the first paper relating climate and adult survival of a seabird appeared using reliable and robust quantitative methods (Barbraud et al, 2000). That exponential phase was likely the result of the increasing interest of the scientific community about climate change in the ecological literature during those years, together with the appearance of new statistical tools and the improvement of computational power (Figure 1) (Green et al, 2005).…”

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confidence: 99%

Seabirds and climate: knowledge, pitfalls, and opportunities

Oró

2014

Front. Ecol. Evol.

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As a physical driver of ecosystem functioning, it is not surprising that climate influences seabird demography and population dynamics, generally by affecting food availability. However, if we zoom in ecologically, seabirds are in fact very heterogeneous, ranging in size from very small to very large species (with a difference of more than two orders of magnitude in body weight), from planktivorous forms to predators of large fish and squid, from benthic to pelagic, from species with small foraging ranges to species feeding throughout the whole circumpolar region, and from resident species (at a spatial mesoscale) to trans-equatorial migrating seabirds that travel large distances across several oceanographic systems. Due to this high variability and the difficulty in obtaining direct reliable estimates of long-term food availability, global climatic indices have been extensively used in studying seabird demography and population dynamics. However, the use made by researchers of these indices has certain conceptual and methodological pitfalls, which I shall address in this review. Other factors, such as anthropogenic impacts (including oil-spills and interaction with fisheries), may further alter or confound the association between climate and seabird demography. These pitfalls and environmental noise, together with the inability to incorporate resilience, may bias our predictions regarding the future impact of global warming on seabirds, many of which have vulnerable populations.Keywords: predictive models, resilience, methodological bias, evolution, global change, climate, seabirds HISTORICAL BACKGROUNDA search performed in June 2014 using the words "climate & seabird" in the ISI Web of Science resulted in 946 items. Even though some of those items dealt with other marine organisms or were focused on some related issues (such as oceanographic processes), that result represents a large number of scientific contributions on the topic of how climate may influence seabird ecology. The influence of climate on marine organisms has been extensively studied in seabirds because, compared to most other species (except some marine mammals such as seals and sealions), their demography and population dynamics can be easily monitored in breeding colonies.Up to the 90s, the changes in demographic parameters and population size in seabirds were explored mostly in relation to intrinsic features of the colonies such as their size or the presence of predators (Hunt et al., 1986). The effects of climate (mostly in the form of oceanographic indices) on seabird ecology were seldom analyzed in those years (Myres, 1979), and research efforts were addressed mostly to determining the distribution of seabirds at sea (Abrams, 1985). The influence of oceanographic features was outlined especially when extreme and anomalous events occurred (such as cyclones or El Niño-Southern Oscillation (ENSO) years (e.g., Blomqvist and Peterz, 1984;Graybill and Hodder, 1985), whereas some pioneering studies dealt with the relationship between climatic ev...

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Centurial and decadal oceanographic influences on changes in northern gannet populations and diets in the north-west Atlantic: implications for climate change

Cited by 136 publications

References 19 publications

On the polar edge: the status of the northern gannet (Morus bassanus) in the Barents Sea in 2015-16

On the polar edge: the status of the northern gannet (Morus bassanus) in the Barents Sea in 2015-16

Changes in sooty shearwater Puffinus griseuschick production and harvest precede ENSO events

Seabirds and climate: knowledge, pitfalls, and opportunities

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