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Testing the abundant-centre hypothesis using intertidal porcelain crabs along the chilean coast: linking abundance and life-history variation
(BLACKWELL SCIENTIFIC PUBLICATIONS, 2010)
Testing the abundant-centre hypothesis using intertidal porcelain crabs along the chilean coast: linking abundance and life-history variation
(BLACKWELL SCIENTIFIC PUBLICATIONS, 2010)
CNO and F abundances in the globular cluster M22 (NGC 6656)
(EDP SCIENCES S ALES ULIS CEDEX A, 2012)
Context. Recent studies have confirmed the long standing suspicion that M 22 shares a metallicity spread and complex chemical enrichment history similar to that observed in omega Cen. M 22 is among the most massive Galactic ...
Chemical abundances of Seyfert 2 AGNs, I: comparing oxygen abundances from distinct methods using SDSS
(Wiley Blackwell Publishing, Inc, 2020-02)
We compare the oxygen abundance (O/H) of the narrow-line regions (NLRs) of Seyfert 2 AGNs obtained through strong-line methods and from direct measurements of the electron temperature (Te-method). The aim of this study is ...
The importance of pollinator generalization and abundance for the reproductive success of a generalist plant
(Public Library Science, 2013-10-07)
Previous studies have examined separately how pollinator generalization and abundance influence plant reproductive success, but none so far has evaluated simultaneously the relative importance of these pollinator attributes. Here we evaluated the extent to which pollinator generalization and abundance influence plant reproductive success per visit and at the population level on a generalist plant, Opuntia sulphurea (Cactaceae). We used field experiments and path analysis to evaluate whether the per-visit effect is determined by the pollinator?s degree of generalization, and whether the population level effect (pollinator impact) is determined by the pollinator?s degree of generalization and abundance. Based on the models we tested, we concluded that the per-visit effect of a pollinator on plant reproduction was not determined by the pollinators? degree of generalization, while the population-level impact of a pollinator on plant reproduction was mainly determined by the pollinators? degree of generalization. Thus, generalist pollinators have the greatest species impact on pollination and reproductive success of O. sulphurea. According to our analysis this greatest impact of generalist pollinators may be partly explained by pollinator abundance. However, as abundance does not suffice as an explanation of pollinator impact, we suggest that vagility, need for resource consumption, and energetic efficiency of generalist pollinators may also contribute to determine a pollinator?s impact on plant reproduction....
Abundance and diversity of small-bird assemblages in the Monte desert, Argentina
(Academic Press Ltd - Elsevier Science Ltd, 2005-12)
Assemblages of small bird species (o90 gbody mass) from the Monte desert in Argentinawere studied to analyze spatial and temporal variation in abundance and species richness.Mean species richness was higher during breeding ...
Gauging the Helium Abundance of the Galactic Bulge RR Lyrae Stars
(Institute of Physics Publishing, 2018)
We report the first estimate of the He abundance of the population of RR Lyrae stars in the Galactic bulge. This is done by comparing the recent observational data with the latest models. We use the large samples of ab-type ...