153 Works

Primary detection records for aquatic nonindigenous species in global estuarine and marine ecosystems and the Great Lakes

Sarah Bailey, Lyndsay Brown, Marnie Campbell, João Canning-Clode, James Carlton, Nuno Castro, Paula Chainho, Farrah Chan, Joel Creed, Amelia Curd, John Darling, Paul Fofonoff, Bella Galil, Chad Hewitt, Graeme Inglis, Inti Keith, Nicholas Mandrak, Agnese Marchini, Cynthia McKenzie, Anna Occhipinti-Ambrogi, Henn Ojaveer, Larissa Pires-Teixeira, Tamara Robinson, Gregory Ruiz, Kimberley Seaward … & Aibin Zhan
Aim The introduction of aquatic non-indigenous species (ANS) has become a major driver for global changes in species biogeography. We examined spatial patterns and temporal trends of ANS detections since 1965 to inform conservation policy and management. Location Global Methods We assembled an extensive dataset of first records of detection of ANS (1965-2015) across 49 aquatic ecosystems, including the i) year of first collection, ii) population status and iii) potential pathway(s) of introduction. Data were...

Data from: Prenatal acoustic programming of mitochondrial function for high temperatures in an arid-adapted bird

Eve Udino, Julia George, Matthew McKenzie, Anaïs Pessato, Ondi Crino, Katherine Buchanan & Mylene Mariette
Sound is an essential source of information in many taxa and can notably be used by embryos to program their phenotypes for postnatal environments. While underlying mechanisms are mostly unknown, there is growing evidence for the implication of mitochondria – main source of cellular energy (i.e. ATP) – in developmental programming processes. Here, we tested whether prenatal sound programs mitochondrial metabolism. In the arid-adapted zebra finch, prenatal exposure to “heat-calls” – produced by parents incubating...

Data from: Light environment change induces differential expression of guppy opsins in a multi-generational evolution experiment

Alexandrea Megan Kranz, Leonard G. Forgan, Gemma Louise Cole & John A. Endler
Light environments critically impact species that rely on vision to survive and reproduce. Animal visual systems must accommodate changes in light that occur from minutes to years, yet we do not know how they respond to divergent spectral changes over longer time scales. Here we used a laboratory experiment where replicate guppy populations were kept different light environments for up to 8-12 generations to explore possible differences in the expression levels of nine guppy opsin...

Data from: Identifying the African wintering grounds of hybrid flycatchers using a multi–isotope (δ2H, δ13C, δ15N) assignment approach

Thor Veen, Mårten B. Hjernquist, Steven L. Van Wilgenburg, Keith A. Hobson, Eelke Folmer, Laura Font & Marcel Klaassen
Migratory routes and wintering grounds can have important fitness consequences, which can lead to divergent selection on populations or taxa differing in their migratory itinerary. Collared (Ficedula albicollis) and pied (F. hypoleuca) flycatchers breeding in Europe and wintering in different sub-Saharan regions have distinct migratory routes on the eastern and western sides of the Sahara desert, respectively. In an earlier paper, we showed that hybrids of the two species did not incur reduced winter survival,...

Data from: Resource availability and sexual size dimorphism: differential effects of prey abundance on the growth rates of tropical snakes

Gregory P. Brown, Thomas R.L. Madsen, Richard Shine, Thomas R. L. Madsen & Rick Shine
1. Broad phylogenetic patterns in sexual size dimorphism (SSD) are shaped by sex differences in net selection pressures (e.g., sexual selection, fecundity selection, survival selection), but environmental and ecological factors can also affect the expression of SSD. 2. Discussions of proximate ecological influences on SSD have focused on niche divergence; for example, increase in a prey type used by only one sex can elevate growth rates of that sex but not the other. Food limitation...

Data from: Species co-occurrence networks show reptile community reorganization under agricultural transformation

Geoffrey M. Kay, Ayesha Tulloch, Philip S. Barton, Saul A. Cunningham, Don A. Driscoll & David B. Lindenmayer
Agricultural transformation represents one of the greatest threats to biodiversity, causing degradation and loss of habitat, leading to changes in the richness and composition of communities. These changes in richness and composition may, in turn, lead to altered species co-occurrence, but our knowledge of this remains limited. We used a novel co-occurrence network approach to examine the impact of agricultural transformation on reptile community structure within two large (> 172 000 km2; 224 sites) agricultural...

Data from: Prenatal acoustic communication programs offspring for high post-hatching temperatures in a songbird

Mylene M. Mariette & Katherine L. Buchanan
In many species, embryos can perceive and learn external sounds. Yet, the possibility that parents may use these embryonic capacities to alter their offspring’s developmental trajectories has not been considered. Here, we demonstrate that zebra finch parents acoustically signal high ambient temperatures (above 26°C) to their embryos. We show that exposure of embryos to these acoustic cues alone adaptively alters subsequent nestling begging and growth in response to nest temperature and influences individuals’ reproductive success...

Data from: Socio-demographic, social-cognitive, health-related and physical environmental variables associated with context-specific sitting time in Belgian adolescents: a one-year follow-up study

Cedric Busschaert, Nicola D. Ridgers, Ilse De Bourdeaudhuij, Greet Cardon, Jelle Van Cauwenberg & Katrien De Cocker
Introduction: More knowledge is warranted about multilevel ecological variables associated with context-specific sitting time among adolescents. The present study explored cross-sectional and longitudinal associations of ecological domains of sedentary behaviour, including socio-demographic, social-cognitive, health-related and physical-environmental variables with sitting during TV viewing, computer use, electronic gaming and motorized transport among adolescents. Methods: For this longitudinal study, a sample of Belgian adolescents completed questionnaires at school on context-specific sitting time and associated ecological variables. At baseline,...

Data from: Assessing reliance on vector navigation in the long-distance oceanic migrations of green sea turtles

Giulia Cerritelli, Giuseppe Bianco, Giacomo Santini, Annette C. Broderick, Brendan J. Godley, Graeme C. Hays, Paolo Luschi & Susanne Åkesson
Vector navigation, i.e. maintaining a constant heading for a given amount of time, is hypothesized to provide a viable basis for the navigational feats of a number of long-distance animal migrants. Since animals following this strategy are subject to drift by wind or by ocean current, performing long migrations relying on vector navigation is particularly challenging. We tested whether vector navigation could be involved in the migrations of green turtles (Chelonia mydas) that migrate between...

Data from: Anticipatory flexibility: larval population density in moths determines male investment in antennae, wings and testes

Tamara L. Johnson, Matthew R.E. Symonds, Mark A. Elgar & Matthew R. E. Symonds
Developmental plasticity provides individuals with a distinct advantage when the reproductive environment changes dramatically. Variation in population density, in particular, can have profound effects on male reproductive success. Females may be easier to locate in dense populations, but there may be a greater risk of sperm competition. Thus, males should invest in traits that enhance fertilization success over traits that enhance mate location. Conversely, males in less dense populations should invest more in structures that...

Data from: An experimental evaluation of the effects of geolocator design and attachment method on between-year survival on whinchats Saxicola rubetra

Emma Blackburn, Malcolm Burgess, Benedictus Freeman, Alice Riseley, Arin Izang, Sam Ivande, Chris Hewson, Will Cresswell & Alice Risely
Data from location logging tags have revolutionised our understanding of migration ecology, but methods of tagging that do not compromise survival need to be identified. We compared resighting rates for 156 geolocator-tagged and 316 colour ringed-only whinchats on their African wintering grounds after migration to and from eastern Europe in two separate years. We experimentally varied both light stalk length (0, 5 and 10 mm) and harness material (elastic or non-elastic nylon braid tied on,...

Data from: A genetic assessment of the human-facilitated colonization history of black swans in Australia and New Zealand

Valeria Montano, Wouter F.D. Van Dongen, Micheal A. Weston, Raoul A. Mulder, Randall W. Robinson, Mary Cowling, Patrick-Jean Guay & Michael A. Weston
Movement of species beyond their indigenous distribution can fundamentally alter the conservation status of the populations involved. If introductions are human-facilitated, introduced species could be considered pests. Characterizing the colonization history of introduced species can, therefore, be critical to formulating the objectives and nature of wildlife management strategies. The black swan (Cygnus atratus) is native to Australia but is considered a reintroduced species in New Zealand, where the endemic population was reported extinct during the...

Data from: Determinants of individual foraging specialisation in large marine vertebrates, the Antarctic and Subantarctic fur seals

Laëtitia Kernaléguen, John P. Y. Arnould, Christophe Guinet & Yves Cherel
1. The degree of individual specialization in resource use differs widely among wild populations where individuals range from fully generalized to highly specialized. This interindividual variation has profound implications in many ecological and evolutionary processes. A recent review proposed four main ecological causes of individual specialization: interspecific and intraspecific competition, ecological opportunity and predation. 2. Using the isotopic signature of subsampled whiskers, we investigated to what degree three of these factors (interspecific and intraspecific competition...

Data from: Plumage coloration follows Gloger’s rule in a ring species

Raoul F. H. Ribot, Mathew L. Berg, Emanuel Schubert, John A. Endler & Andrew T. D. Bennett
Aim: Animal coloration is expected to differ between populations in different habitats according to Gloger’s rule, with darker animals found in more humid, vegetated or warmer environments. Yet despite considerable support across the globe, the mechanisms behind this biogeographical rule are currently still unclear. Exploiting a ring species with plumage coloration from crimson to pale yellow, we test Gloger’s rule and the mechanisms behind phenotypic divergence. Location: South-eastern Australia. Major taxa studied: Crimson rosellas (Platycercus...

Data from: Geochemical analyses reveal the importance of environmental history for blue carbon sequestration

Jeffrey J. Kelleway, Neil Saintilan, Peter I. Macreadie, Jeff A. Baldock, Hendrik Heijnis, A. Zawadzkis, Patricia Gadd, Geraldine Jacobsen & Peter J. Ralph
Coastal habitats including saltmarshes and mangrove forests can accumulate and store significant blue carbon stocks, which may persist for millennia. Despite this implied stability, the distribution and structure of intertidal-supratidal wetlands is known to respond to changes imposed by geomorphic evolution, climatic, sea level and anthropogenic influences. In this study, we reconstruct environmental histories and biogeochemical conditions in four wetlands of similar contemporary vegetation in SE Australia. The objective is to assess the importance of...

Data from: Evolution of the additive genetic variance–covariance matrix under continuous directional selection on a complex behavioural phenotype

Vincent Careau, Matthew E. Wolak, Patrick A. Carter & Theodore Garland
Given the pace at which human-induced environmental changes occur, a pressing challenge is to determine the speed with which selection can drive evolutionary change. A key determinant of adaptive response to multivariate phenotypic selection is the additive genetic variance–covariance matrix (G). Yet knowledge of G in a population experiencing new or altered selection is not sufficient to predict selection response because G itself evolves in ways that are poorly understood. We experimentally evaluated changes in...

Data from: Eradicating abundant invasive prey could cause unexpected and varied biodiversity outcomes: the importance of multi-species interactions

Miguel Lurgi, Euan G. Ritchie & Damien A. Fordham
1. Abundant and widely-distributed invasive prey can negatively affect co-occurring native species by competing for food and/or shelter, removing vegetation cover and reducing habitat complexity (changing predation risk), and by sustaining elevated abundances of invasive mesopredators. However, information regarding the community and trophic consequences of controlling invasive prey, and their temporal dynamics, remain poorly understood. 2. We used multi-species ecological network models to simulate the consequences of changing European rabbit Oryctolagus cuniculus abundance in an...

Data from: Compact cities or sprawling suburbs? optimising the distribution of people in cities to maximise species diversity

Andrew Geschke, Simon James, Andrew F. Bennett & Dale G. Nimmo
1. Conservation of biodiversity in urban environments depends on the responses of species to the intensity of urban development. ‘Land sharing’ and ‘land sparing’ represent alternate ends of a gradient that conceptualises a trade-off between the human population and biodiversity. We used a linear optimisation procedure to 1) identify the optimal allocation of land for people and nature, 2) assess whether the optimal allocation is more similar to land sparing or land sharing, and 3)...

The effect of temperature on appetite in fish

Fredrik Jutfelt, Tommy Norin, Eirik Åsheim, Lauren Rowsey, Anna Andreassen, Rachael Morgan, Timothy Clark & Ben Speers-Roesch
Temperature has a dramatic effect on the physiology of ectothermic animals, impacting most of their biology. When temperatures increase above optimal for an animal, their growth gradually decreases. The main mechanism behind this growth rate reduction is unknown. Here, we suggest the ‘aerobic scope protection’ hypothesis as a mechanistic explanation for the reduction in growth. After a meal, metabolic rate, and hence oxygen consumption rate, transiently increases in a process called specific dynamic action (SDA)....

Physiological costs and age constraints of a sexual ornament: an experimental study in a wild bird

Alexandra McQueen, Kaspar Delhey, Beatrice Szecsenyi, Ondi Crino, Michael Roast & Anne Peters
Sexual ornaments are often considered honest signals of quality because potential costs or constraints prevent their display by low-quality individuals. Testing for potential physiological costs of ornaments is difficult, as this requires experimentally forcing individuals to produce and display elaborate ornaments. We use this approach to test whether a sexually selected trait is physiologically costly to male superb fairy-wrens (Malurus cyaneus). Male fairy-wrens moult from brown to blue breeding plumage at different times of the...

Human impact overrides bioclimatic drivers of red fox home range size globally

Michael Main, Robert Davis, David Blake, Harriet Mills & Tim Doherty
Aim Identifying the variables that influence animal home range size is important for understanding the biological requirements of individuals and their social interactions. Given their often broad distributions, carnivores are model organisms for studying range-wide determinants of home range size. Here we test predictions about environmental determinants of home range size for one of the world’s most widely distributed carnivores, the red fox (Vulpes vulpes). Location Global Methods We compiled a database of 70 mean...

Dataset from: Positive indirect effects of top-predators on the survival and behaviour of juvenile fishes

Maria Palacios & Mark McCormick
Top-predators can suppress mesopredator behaviour through risk effects. However, there is limited understanding of whether such behavioural suppression can dampen the lethal and sub-lethal effects of mesopredators on bottom level prey. Here, we document a field experiment that examines whether the presence of top-predator cues (visual and chemical stimuli from a coral trout) can cascade to indirectly influence the behaviour and survival of juvenile fish prey of different species (Pomacentrus amboinensis and P. chrysurus) and...

Genetic data and climate niche suitability models highlight the vulnerability of a functionally important plant species from south-eastern Australia

Adam Miller, Craig Nitschke, Andrew Weeks, William Weatherly, Simon Heyes, Steven Sinclair, Owen Holland, Aggie Stevenson, Linda Broadhurst, Susan Hoebee, Craig D. H. Sherman & John Morgan
Habitat fragmentation imperils the persistence of many functionally important species, with climate change a new threat to local persistence due to climate-niche mismatching. Predicting the evolutionary trajectory of species essential to ecosystem function under future climates is challenging but necessary for prioritizing conservation investments. We use a combination of population genetics and niche suitability models to assess the trajectory of a functionally important, but highly fragmented, plant species from south-eastern Australia (Banksia marginata, Proteaceae). We...

Data from: Reptile responses to anthropogenic habitat modification: a global meta-analysis

Tim S. Doherty, Sara Balouch, Kristian Bell, Thomas Burns, Anat Feldman, Charles Fist, Timothy Garvey, Tim Jessop, Shai Meiri & Don Driscoll
Aim To determine how reptile populations respond to anthropogenic habitat modification and determine if species traits and environmental factors influence such responses. Location Global. Time period 1981–2018. Major taxa studied Squamata. Methods We compiled a database of 56 studies reporting how habitat modification affects reptile abundance, and calculated standardised mean differences in abundance (Hedges’ g). We used Bayesian meta-analytical models to test whether responses to habitat modification depended on body size, clutch size, reproductive mode,...

Year-round at-sea movements of fairy prions from south-eastern Australia

Aymeric Fromant, Yonina Eizenberg, Timothee Poupart, Paco Bustamante & John Arnould
Effective conservation assessments require detailed information of species’ ecological niches during the whole annual cycle. For seabirds, this implies investigating the at-sea distribution and foraging behaviour during both the breeding and non-breeding periods. However, until recently, collecting information about the smallest species has been precluded by the excessive size of the required devices. This lack of knowledge is exacerbated in the case of polytypic genera with species sharing very similar appearance and behaviour, such as...

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