Oecologia

Journal: Oecologia

Abbreviation

Oecologia

Publisher

Springer

ISSN

0029-8549
1432-1939

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Publications 1 - 10 of 70

Spatial variation in abiotic and biotic factors in a floodplain determine anuran body size and growth rate at metamorphosis
Indermaur, Lukas; Schmidt, Benedikt R.; Tockner, Klement; et al. (2010)
Oecologia
Legume species differ in the responses of their functional traits to plant diversity
Roscher, Christiane; Schmid, Bernhard; Buchmann, Nina; et al. (2011)
Oecologia
Using eDNA to understand predator–prey interactions influenced by invasive species
Riaz, Maria; Warren, Dan; Wittwer, Claudia; et al. (2023)
Oecologia
Invasive predatory species may alter population dynamic processes of their prey and impact biological communities and ecosystem processes. Revealing biotic interactions, however, including the relationship between predator and prey, is a difficult task, in particular for species that are hard to monitor. Here, we present a case study that documents the utility of environmental DNA analysis (eDNA) to assess predator–prey interactions between two invasive fishes (Lepomis gibbosus, Pseudorasbora parva) and two potential amphibian prey species, (Triturus cristatus, Pelobates fuscus). We used species-specific TaqMan assays for quantitative assessment of eDNA concentrations from water samples collected from 89 sites across 31 ponds during three consecutive months from a local amphibian hotspot in Germany. We found a negative relationship between eDNA concentrations of the predators (fishes) and prey (amphibians) using Monte-Carlo tests. Our study highlights the potential of eDNA application to reveal predator–prey interactions and confirms the hypothesis that the observed local declines of amphibian species may be at least partly caused by recently introduced invasive fishes. Our findings have important consequences for local conservation management and highlight the usefulness of eDNA approaches to assess ecological interactions and guide targeted conservation action.
²H-enrichment of cellulose and n-alkanes in heterotrophic plants
Cormier, Marc-André; Werner, Roland A.; Leuenberger, Markus C.; et al. (2019)
Oecologia
Explaining long-term inter-individual growth variation in plant populations: persistence of abiotic factors matters
Jansen, Merel; Anten, Niels P.R.; Bongers, Frans; et al. (2017)
Oecologia
An unanswered question in ecology is whether the environmental factors driving short-term performance also determine the often observed long-term performance differences among individuals. Here, we analyze the extent to which temporal persistence of spatial heterogeneity in environmental factors can contribute to long-term inter-individual variation in stem length growth. For a natural population of a long-lived understorey palm, we first quantified the effect of several environmental factors on stem length growth and survival. We then performed individual-based simulations of growth trajectories, in which we varied, for two environmental factors: (1) the strength of the effect on stem length growth and (2) the temporal persistence. Short-term variation in stem length growth was strongly driven by light availability. Auto-correlation in light availability and soil pH increased simulated variation in stem length growth among 20-year-old palms to levels similar to the observed variation. Analyses in which we varied both the strength of the effect on stem length growth and the temporal persistence of the environmental factors revealed that a large fraction of observed long-term growth differences can be explained, as long as one of these effects is strong. This implies that environmental factors that are relatively unimportant for short-term performance can still drive long-term performance differences when the environmental variation is sufficiently persistent over time.
Hummingbird community structure and nectar resources modulate the response of interspecific competition to forest conversion
Guevara, Esteban A.; Bello, Carolina; Poveda, Cristian; et al. (2023)
Oecologia
On-going land-use change has profound impacts on biodiversity by filtering species that cannot survive in disturbed landscapes and potentially altering biotic interactions. In particular, how land-use change reshapes biotic interactions remains an open question. Here, we used selectivity experiments with nectar feeders in natural and converted forests to test the direct and indirect effects of land-use change on resource competition in Andean hummingbirds along an elevational gradient. Selectivity was defined as the time hummingbirds spent at high resource feeders when feeders with both low and high resource values were offered in the presence of other hummingbird species. Selectivity approximates the outcome of interspecific competition (i.e., the resource intake across competing species); in the absence of competition, birds should exhibit higher selectivity. We evaluated the indirect effect of forest conversion on selectivity, as mediated by morphological dissimilarity and flower resource abundance, using structural equation models. We found that forest conversion influenced selectivity at low and mid-elevations, but the influence of morphological dissimilarity and resource availability on selectivity varied between these elevations. At mid-elevation, selectivity was more influenced by the presence of morphologically similar competitors than by resource abundance while at low-elevation resource abundance was a more important predictor of selectivity. Our results suggest that selectivity is influenced by forest conversion, but that the drivers of these changes vary across elevation, highlighting the importance of considering context-dependent variation in the composition of resources and competitors when studying competition.
Litter decomposition across multiple spatial scales in stream networks
Tiegs, Scott D.; Akinwole, Philips O.; Gessner, Mark O. (2009)
Oecologia
Effects of combined ozone and nitrogen deposition on the in situ properties of eleven key plant species of a subalpine pasture
Bassin, Seraina; Werner, Roland A.; Sörgel, Karin; et al. (2009)
Oecologia
Placing biodiversity and ecosystem functioning in context
McKie, Brendan; Schindler, Markus; Gessner, Mark O.; et al. (2009)
Oecologia
Short-term variations in delta C-13 of ecosystem respiration reveals link between assimilation and respiration in a deciduous forest
Werner, Roland A.; Buchmann, Nina; Knohl, Alexander; et al. (2005)
Oecologia

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