10 Works

Data from: Individual heterogeneity in fitness in a long-lived herbivore

Madeleine Lohman, Thomas Riecke, Perry Williams & James Sedinger
Heterogeneity in the intrinsic quality and nutritional condition of individuals affects reproductive success and consequently fitness. Black brant (Branta bernicla nigricans) are long-lived, migratory, specialist herbivores. Long migratory pathways and short summer breeding seasons constrain the time and energy available for reproduction, thus magnifying life-history trade-offs. These constraints, combined with long lifespans and trade-offs between current and future reproductive value, provide a model system to examine the role of individual heterogeneity in driving life-history strategies...

Data from: Tropical deforestation reduces plant mating quality by shifting the functional composition of pollinator communities

Felipe Torres-Vanegas, Adam S. Hadley, Urs G. Kormann, F. Andrew Jones, Matthew G. Betts & Helene H. Wagner
Deforestation can impact the quality of pollen received by target plants (i.e., delivery of incompatible pollen, self-pollen, or pollen from closely related individuals). Such reductions in plant mating quality may be direct, when deforestation reduces plant population size and the availability of pollen donors, or indirect, when decreased mating quality results, for example, from shifts in the composition of the pollinator community. As most flowering plants depend on animal pollinators for reproduction, there is a...

Scale dependency of joint species distribution models challenges interpretation of biotic interactions

Christian König, Rafael O. Wüest, Catherine H. Graham, Dirk Nikolaus Karger, Thomas Sattler, Niklaus E. Zimmermann & Damaris Zurell
Aim: Separating the biotic and abiotic factors controlling species distributions has been a long-standing challenge in ecology and biogeography. Joint species distribution models (JSDMs) have emerged as a promising statistical framework towards this objective by simultaneously modeling the environmental responses of multiple species and approximating species associations based on patterns in their (co-)occurrences. However, the signature of biotic interactions should be most evident at fine spatial resolutions. Here, we test how the resolution of input...

Bird species co-occurrence patterns in an Alpine environment supports the stress gradient hypothesis

Vicente García-Navas, Thomas Sattler, Hans Schmid & Arpat Ozgul
Understanding the relative contribution of different biotic interactions in shaping species assemblages constitutes a major goal in community ecology and consequently, multiple methods aimed at inferring the nature of these associations have emerged during the last decade. In this framework, the stress-gradient hypothesis (SGH) predicts that prevalent biotic interactions shift from competition to facilitation as abiotic stress increases (and productivity decreases). This hypothesis originally raised by plant ecologists has been barely applied to faunal communities....

Behavioural change during dispersal and its relationship to survival and reproduction in a cooperative breeder

Natasha Harrison, Nino Maag, Paul Haverkamp, André Ganswindt, Marta Manser, Tim Clutton-Brock, Arpat Ozgul & Gabriele Cozzi
(1) The ability of dispersing individuals to adjust their behaviour to changing conditions is instrumental in overcoming challenges and reducing dispersal costs, consequently increasing overall dispersal success. Understanding how dispersers’ behaviour and physiology change during the dispersal process, and how they differ from resident individuals, can shed light on the mechanisms by which dispersers increase survival and maximise reproduction. (2) By analysing individual behaviour and concentrations of faecal glucocorticoid metabolites (fGCM), a stress-associated biomarker, we...

Data from: The genetic regulation of avian migration timing: combining candidate genes and quantitative genetic approaches in a long-distance migrant

Miloš Krist, Pavel Munclinger, Martins Briedis & Peter Adamík
Plant and animal populations can adapt to prolonged environmental changes if they have sufficient genetic variation in important phenological traits. The genetic regulation of annual cycles can be studied either via candidate genes or through the decomposition of phenotypic variance by quantitative genetics. Here we combined both approaches to study the timing of migration in a long-distance migrant, the collared flycatcher (Ficedula albicollis). We found that none of the four studied candidate genes (CLOCK, NPAS2,...

Seasonal and daily movement patterns of an alpine passerine suggest high flexibility in relation to environmental conditions

Arnaud Barras, Felix Liechti & Raphaël Arlettaz
Mountains naturally offer variable habitat conditions, but their biodiversity is currently facing the extra challenge of adapting to rapid environmental shifts that are much more pronounced than in the lowlands. Among adaptive responses, intra- and inter-seasonal movements represent potentially important coping strategies for wildlife that remain largely unexplored. We investigated the seasonal and daily movements of the ring ouzel Turdus torquatus, a European mountain bird species that is declining in many parts of its distribution....

Experimental evaluation of herbicide use on biodiversity, ecosystem services, and timber production tradeoffs in forest plantations

Thomas Stokely, Urs Kormann, Jake Verschuyl, Andrew Kroll, David Frey, Scott Harris, Doug Mainwaring, Douglas Maguire, Jeff Hatten, James Rivers, Stephen Fitzgerald & Matthew Betts
The value of non-commodity ecosystem services provided by forests is widely recognized, but intensive forest management practices are increasing, with uncertain consequences for a multitude of these services. Quantitative relationships among biodiversity conservation, timber production, and other ecosystem services remain poorly understood, especially during the early successional period of intensively managed forestlands. We manipulated management intensity in regenerating forest plantations to test the prediction that treatments aimed at maximizing timber production decrease biodiversity conservation and...

Dataset: Experimental evaluation of herbicide use on biodiversity, ecosystem services and timber production tradeoffs in forest plantations.

Thomas D Stokely
This dataset consists of species richness of native plants, pollinators, and birds, ecosystem service response variables, and timber and revenue projections from forest plantations of the Oregon Coast Range, collected during the first 6 years of stand establishment (2011-2016). The objectives of the Intensive Forest Management experiment were to quantify the effects of herbicide use on biodiversity and ecosystem services and the relative tradeoffs between timber production and ecosystem services.

Data from: Sharing detection heterogeneity information among species in community models of occupancy and abundance can strengthen inference

Thomas Riecke, Dan Gibson, Marc Kéry & Michael Schaub
1. The estimation of abundance and distribution and factors governing patterns in these parameters is central to the field of ecology. The continued development of hierarchical models that best utilize available information to inform these processes is a key goal of quantitative ecologists. However, much remains to be learned about simultaneously modeling true abundance, presence, and trajectories of ecological communities. 2. Simultaneous modeling of the population dynamics of multiple species provides an interesting mechanism to...

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