6 Works

Data from: Community disassembly and invasion of remnant native grasslands under fluctuating resource supply

Pedro Maximiliano Tognetti & Enrique Jose Chaneton
1. Native vegetation fragments embedded in anthropogenic landscapes are increasingly threatened by land-use intensification. Managing disturbance regimes and nutrient inputs may help maintain species diversity in such remnants. Yet it is unclear the extent to which changes in resource availability due to reduced capture by resident plants and/or increased supply rates may trigger native community disassembly and exotic invasions. 2. We examined how mowing disturbance and N fertilizer addition affected plant community recovery after a...

Data from: Episodic bamboo die-off, neighbourhood interactions, and tree seedling performance in a Patagonian mixed forest

Fernando D. Caccia, Thomas Kitzberger & Enrique J. Chaneton
1. Episodic mass flowering and subsequent die-off of bamboo understories may generate rare opportunities for tree regeneration by altering consumer-seedling interactions as much as by increasing light availability to seedlings. We hypothesized that bamboo dieback interacts with canopy neighbourhood composition in creating recruitment microsites for tree seedling species with varied shade tolerance and susceptibility to herbivory. 2. We conducted a 2-year experiment in a Patagonian mixed forest altered by extensive, but patchy dieback of the...

Data from: The gastropod family Aporrhaidae in the Lower Cretaceous of the Neuquén Basin, west-central Argentina

Cecilia S. Cataldo
The gastropod fauna of the Lower Cretaceous of the Argentinian Neuquén Basin contains three aporrhaid species. Protohemichenopus neuquensis Camacho, 1953 is the most abundant, longest-lived, and most geographically widespread of the aporrhaids of this basin, and its protoconch and early teleoconch whorls were unknown until now. The new species Dimorphosoma weaveri features convex to subtly angular spire whorls with opisthocyrt collabral ribs that are more prominent towards the mid-whorl, a bicarinate last whorl with small...

Data from: Broad-scale variation of fungal-endophyte incidence in temperate grasses

María Semmartin, Marina Omacini, Pedro E. Gundel & Ignacio M. Hernández-Agramonte
1. The strength of many interactions between plants and other organisms changes across regional gradients. For example, the relevance of plant-herbivore interactions increases with primary production. Likewise, biotic interactions collectively become more intense from the poles to the equator. Yet, the regional variation of the interaction between grasses and systemic fungal endophytes, which provide resistance to biotic and abiotic environmental factors (i.e. herbivory and drought), is poorly understood. 2. We compiled 1008 records of the...

Data from: The youngest South American rhynchocephalian, a survivor of the K/Pg extinction

Sebastian Apesteguía, Raúl O. Gómez, Guillermo W. Rougier & R. O. Gomez
Rhynchocephalian lepidosaurs, though once widespread worldwide, are represented today only by the tuatara (Sphenodon) of New Zealand. After their apparent early Cretaceous extinction in Laurasia, they survived in southern continents. In South America, they are represented by different lineages of Late Cretaceous eupropalinal forms until their disappearance by the Cretaceous/Palaeogene (K/Pg) boundary. We describe here the only unambiguous Palaeogene rhynchocephalian from South America; this new taxon is a younger species of the otherwise Late Cretaceous...

Data from: Pinus ponderosa alters nitrogen dynamics and diminishes the climate footprint in natural ecosystems of Patagonia

Laura J. T. Hess & Amy T. Austin
1. Evaluating climate effects on plant-soil interactions in terrestrial ecosystems remains challenging due to the fact that floristic composition co-varies with climate, particularly along rainfall gradients. It is difficult to separate effects of precipitation per se from those mediated indirectly through changes in species composition. As such, afforestation (the intentional planting of woody species) in terrestrial ecosystems provides an ecological opportunity to assess the relative importance of climate and vegetation controls on ecosystem processes. 2....

Registration Year

  • 2014
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Resource Types

  • Dataset
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Affiliations

  • University of Buenos Aires
    6
  • Stanford University
    1
  • University of Louisville
    1
  • National University of Comahue
    1
  • National Scientific and Technical Research Council
    1