Did the animal move? A cross-wavelet approach to geolocation data reveals year-round whereabouts of a resident seabird

Roy, Amédée; Delord, Karine; Nunes, Guilherme Tavares; Barbraud, Christophe; Bugoni, Leandro; Lanco-Bertrand, Sophie

doi:10.1007/s00227-021-03923-x

Cited by 6 publications

(17 citation statements)

References 62 publications

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“…Furthermore, the masked booby remains on Fernando de Noronha in both the rainy and dry seasons, moving to foraging grounds eastward but returning regularly (Roy et al . 2021). This behaviour provides year‐round nutrient input, mainly for soil and primary producers (Caut et al .…”

Section: Discussionmentioning

confidence: 99%

“…Thus, these groups could have contributed to the transport of marine nutrients towards the SScol transect. Furthermore, the masked booby remains on Fernando de Noronha in both the rainy and dry seasons, moving to foraging grounds eastward but returning regularly (Roy et al 2021). This behaviour provides year-round nutrient input, mainly for soil and primary producers (Caut et al 2012;Mallory et al 2015), which explains the lack of a difference between dry and rainy seasons for groups assessed on the SDcol transect.…”

Section: Horizontal and Temporal Dimensionsmentioning

confidence: 93%

“…Sulidae seabirds (boobies and gannets) perform foraging trips 100 km or more away from their nests and feed in areas up to 300 km 2 , staying at sea for some hours or up to approximately 2-4 days (Young et al 2015;Lerma et al 2020a;Roy et al 2021). In the Fernando de Noronha Archipelago, tropical Atlantic Ocean, two central place foragers breed on a small islet during distinct periods.…”

Section: Introductionmentioning

confidence: 99%

“…In the Fernando de Noronha Archipelago, tropical Atlantic Ocean, two central place foragers breed on a small islet during distinct periods. The masked booby (Sula dactylatra) resides on the island over the entire annual cycle (Roy et al 2021) but breeds only during part of the rainy season (March-June) by establishing a colony with approximately 400 individuals nesting on the ground. The red-footed booby (Sula sula) colony holds ~1500 individuals on trees during part of the dry season (August-November), making sparse nests when the branches are leafless, and most individuals leave the island after the breeding season (authors' unpubl.…”

Section: Introductionmentioning

confidence: 99%

“…2020a; Roy et al . 2021). In the Fernando de Noronha Archipelago, tropical Atlantic Ocean, two central place foragers breed on a small islet during distinct periods.…”

Section: Introductionmentioning

confidence: 99%

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Dissipation of seabird‐derived nutrients in a terrestrial insular trophic web

2022

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Highly mobile organisms can transport nutrients and energy among distinct ecosystems, such as between oceanic foraging areas and terrestrial breeding sites. Seabirds are great nutrient carriers and potentially play a key role in the maintenance of trophic webs on islands. In this study, we assessed three dimensions of marine nutrient dissipation-horizontal, temporal and vertical-on the tropical Meio Island of Fernando de Noronha Archipelago, Brazil. For this, C 3 and C 4 plants, ants and spiders found in a 100 m long transect between colonies of masked (Sula dactylatra) and red-footed boobies (Sula sula) were sampled during the rainy (the masked booby breeding period) and dry seasons (the red-footed booby breeding period). The marine contribution to the terrestrial trophic web was analysed using Bayesian mixing models from a carbon and nitrogen stable isotope data set. The main findings indicate that marine nutrients in the terrestrial trophic web dissipated horizontally as the distance from the colony increased, which was more marked during the rainy season. On the vertical axis, the relative contribution of marine nutrients in terrestrial consumers was strongly related to food habits but not necessarily to the trophic level, dissipating rather than increasing, due to variable omnivory and the use of terrestrial food sources. The breeding strategy of the masked booby (i.e. incubating eggs on the ground), in addition to a larger body size and larger colony, could produce a more concentrated pulse of nutrients in comparison to seabirds nesting sparsely on trees, contributing more efficiently to the enrichment of marine nutrients on land. The importance of seabirds for the maintenance of interconnected ecosystems has been demonstrated, and the role of marine-derived nutrients in the enrichment of nutrient-poor tropical islands.

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Section: Discussionmentioning

confidence: 99%

Section: Horizontal and Temporal Dimensionsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…2020a; Roy et al . 2021). In the Fernando de Noronha Archipelago, tropical Atlantic Ocean, two central place foragers breed on a small islet during distinct periods.…”

Section: Introductionmentioning

confidence: 99%

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Dissipation of seabird‐derived nutrients in a terrestrial insular trophic web

2022

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Variations in inter‐specific and sex‐related niche partitioning in pelagic boobies during their annual cycle

Lerma,

Dehnhard,

Castillo‐Guerrero

et al. 2024

Ecology and Evolution

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Animals that co‐occur in a region (sympatry) may share the same environment (syntopy), and niche differentiation is expected among closely related species competing for resources. The masked booby (Sula dactylatra) and smaller congeneric red‐footed booby (Sula sula) share breeding grounds. In addition to the inter‐specific size difference, females of both species are also larger than the respective males (reversed sexual size dimorphism). Although both boobies consume similar prey, sometimes in mixed‐species flocks, each species and sex may specialize in terms of their diet or foraging habitats. We examined inter‐ and intra‐specific differences in isotopic values (δ13C and δ15N) in these pelagically feeding booby species during the incubation period at Clarion Island, Mexico, to quantify the degrees of inter‐ and intra‐specific niche partitioning throughout the annual cycle. During incubation, both species preyed mainly on flyingfish and squid, but masked boobies had heavier food loads than red‐footed boobies. There was no overlap in isotopic niches between masked and red‐footed boobies during breeding (determined from whole blood), but there was slight overlap during the non‐breeding period (determined from body feathers). Female masked boobies had a higher trophic position than conspecific males during breeding; however, no such pattern was detected in red‐footed boobies. These results provide evidence of inter‐ and intra‐specific niche partitioning in these tropical seabird species, particularly during the breeding period and in the more‐dimorphic species. Our results suggest that these closely related species use different strategies to cope with the same tropical marine environment.

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Nutritional state variations in a tropical seabird throughout its breeding season

et al. 2022

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Individual body condition is frequently used to explain differences in foraging and breeding ecology in seabirds. However, little is known about the covariations of body mass with the nutritional state of animals as measured through plasma metabolites and how these different measures vary between and within individuals during breeding. Here, we assessed intra-individual variations of plasma metabolites (triglycerides, cholesterol, protein, and ß-hydroxybutyrate concentrations) and in body mass of Blue-footed boobies (Sula nebouxii) throughout their breeding season 2011–2012 in Isla El Rancho, Mexico. We found breeding-stage and sex-specific variations in individuals’ plasma metabolite concentrations, but these did not mirror variations in body mass. Before egg-laying, females had higher triglycerides, cholesterol, and protein concentrations than males. In contrast, males used their nutritional reserves (higher ß-hydroxybutyrate concentrations) more than females during the breeding season (except for early chick-rearing). At the individual level, males gained weight during the breeding season, whereas females lost weight. We also found that between-individual differences in plasma metabolite concentrations and changes in body mass were not consistent throughout the breeding season, while individual body mass was significantly repeatable. This study contributes to a better understanding of seabird breeding ecology and physiology by showing that sex-specific breeding roles might highly influence the nutritional state. Similar patterns might occur in other seabird species, helping to explain why we can find stage- and sex-specific foraging behaviors even in monomorphic species.

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Did the animal move? A cross-wavelet approach to geolocation data reveals year-round whereabouts of a resident seabird

Cited by 6 publications

References 62 publications

Dissipation of seabird‐derived nutrients in a terrestrial insular trophic web

Dissipation of seabird‐derived nutrients in a terrestrial insular trophic web

Variations in inter‐specific and sex‐related niche partitioning in pelagic boobies during their annual cycle

Nutritional state variations in a tropical seabird throughout its breeding season

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