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25977 research data, page 1 of 2598

Phenology effects on invasion success: insights from coupling field experiments to coexistence theory

Oscar Godoy; Levine, Jonathan M. (2016)
Publisher: Figshare
Ecologists have identified a growing number of functional traits that promote invasion. However, whether trait differences between exotic and native species promote invasion success by enhancing niche differences or giving invaders competitive advantages is poorly understood. We explored the mechanisms by which phenology determines invasion success in a California annual plant community by quantifying how the seasonal timing of growth relates to niche differences that stabilize coexistence, a...

FIRE INCREASES INVASIVE SPREAD OF MOLINIA CAERULEA MAINLY THROUGH CHANGES IN DEMOGRAPHIC PARAMETERS

Hans Jacquemyn; Rein Brys; Neubert, Michael G. (2016)
Publisher: Figshare
We investigated the effects of fire on population growth rate and invasive spread of the perennial tussock grass Molinia caerulea. During the last decades, this species has invaded heathland communities in Western Europe, replacing typical heathland species such as Calluna vulgaris and Erica tetralix. M. caerulea is considered a major threat to heathland conservation. In 1996, a large and unintended fire destroyed almost one-third of the Kalmthoutse Heide, a large heathland area in northern B...

ARE ADULT NONBREEDERS PRUDENT PARENTS? THE KITTIWAKE MODEL

Understanding evolutionary consequences of intermittent breeding (nonbreeding in individuals that previously bred) requires investigation of the relationships between adult breeding state and two demographic parameters: survival probability and subsequent breeding probability. One major difficulty raised by comparing the demographic features of breeders and nonbreeders as estimated from capture–recapture data is that breeding state is often suspected to influence recapture or resighting proba...

Plant traits mediate consumer and nutrient control on plant community productivity and diversity

Anu Eskelinen; Susan Harrison; Maria Tuomi (2016)
Publisher: Figshare
The interactive effects of consumers and nutrients on terrestrial plant communities, and the role of plant functional traits in mediating these responses, are poorly known. We carried out a six-year full-factorial field experiment using mammalian herbivore exclusion and fertilization in two habitat types (fertile and infertile alpine tundra heaths) that differed in plant functional traits related to resource acquisition and palatability. Infertile habitats were dominated by species with trait...

Calcareous nannofossils from the Paleocene-Eocene Thermal Maximum of the equatorial Atlantic, supplement to: Mutterlose, Jörg; Linnert, Christian; Norris, Richard D (2007): Calcareous nannofossils from the Paleocene-Eocene Thermal Maximum of the equatorial Atlantic (ODP Site 1260B): Evidence for tropical warming. Marine Micropaleontology, 65(1-2), 13-31

Mutterlose, Jörg; Linnert, Christian; Norris, Richard D (2007)
Publisher: PANGAEA - Data Publisher for Earth & Environmental Science
Independent geological and micropaleontological lines of evidence suggest a ~200 kyr, period of intense warming covering the Paleocene/Eocene boundary interval (PETM). It has been suggested that this warming was initiated by a massive release of methane from the continental slopes. Among other groups of organisms, calcareous nannofossils are characterized by a remarkable increase of warm water taxa during this interval. Here we report the tropical response of calcareous nannofossils to the Pa...

Report on the International Workshop on Contributorship and Scholarly Attribution, May 16, 2012

Irene Hames (2012)
Publisher: Figshare
  On May 16, 2012, individuals from a wide range of sectors with interests in scholarly publishing gathered together at an invitation-only workshop at Harvard University to discuss authorship, contributorship and attribution, and to explore alternative models. The report summarises the problems identified with current attribution and citation practices, details the discussions and recommendations from the breakout groups on how they could be improved, and lists the projects being taken for...

Downscaling the environmental associations and spatial patterns of species richness

Petr Keil; Walter Jetz (2016)
Publisher: Figshare
We introduce a method that enables the estimation of species richness–environment association and prediction of geographic patterns of species richness at grains finer than the original grain of observation. The method is based on a hierarchical model that uses coarse-grain values of species richness and fine-grain environmental data as input. In the model, the (unobserved) fine-grain species richness is linked to the observed fine-grain environment and upscaled using a simple species–area re...