12 research outputs found
High proportion of cactus species threatened with extinction
This is the author accepted manuscript. The final version is available from Nature Publishing Group via the DOI in this record.Consejo Nacional de Ciencia y Tecnologí
Recommended from our members
Sediment impacts on growth rates of Acropora and Porites corals from fringing reefs of Sulawesi, Indonesia
Small changes in environmental parameters can cause significant changes in growth rates. Often, environmental parameters influencing growth can be multifactorial, so that high energy and high sedimentation together can reduce growth (Cruz-Pinon et al. 2003), while changes in temperature, salinity, and sedimentation can influence not only growth but also diversity and abundance of corals(Lirman et al. 2003). Using digital videophotography and computer image analysis, as well as physical measurements,
we have surveyed the reefs near the island of
Hoga, where a Marine Research Station run by Operation Wallacea is situated. Our studies were to test the hypothesis that sedimentation and insolation on Porites lutea and Acropora valeniennesi corals from fringing reefs of Sulawesi in Indonesia influenced coral growth.
Radial and linear growth rates were measured
DESI 2024 IV: Baryon Acoustic Oscillations from the Lyman Alpha Forest
International audienceWe present the measurement of Baryon Acoustic Oscillations (BAO) from the Lyman- (Ly) forest of high-redshift quasars with the first-year dataset of the Dark Energy Spectroscopic Instrument (DESI). Our analysis uses over Ly forest spectra and their correlation with the spatial distribution of more than quasars. An essential facet of this work is the development of a new analysis methodology on a blinded dataset. We conducted rigorous tests using synthetic data to ensure the reliability of our methodology and findings before unblinding. Additionally, we conducted multiple data splits to assess the consistency of the results and scrutinized various analysis approaches to confirm their robustness. For a given value of the sound horizon (), we measure the expansion at with 2% precision, km/s/Mpc. Similarly, we present a 2.4% measurement of the transverse comoving distance to the same redshift, Gpc. Together with other DESI BAO measurements at lower redshifts, these results are used in a companion paper to constrain cosmological parameters
DESI 2024 IV: Baryon Acoustic Oscillations from the Lyman Alpha Forest
International audienceWe present the measurement of Baryon Acoustic Oscillations (BAO) from the Lyman- (Ly) forest of high-redshift quasars with the first-year dataset of the Dark Energy Spectroscopic Instrument (DESI). Our analysis uses over Ly forest spectra and their correlation with the spatial distribution of more than quasars. An essential facet of this work is the development of a new analysis methodology on a blinded dataset. We conducted rigorous tests using synthetic data to ensure the reliability of our methodology and findings before unblinding. Additionally, we conducted multiple data splits to assess the consistency of the results and scrutinized various analysis approaches to confirm their robustness. For a given value of the sound horizon (), we measure the expansion at with 2% precision, km/s/Mpc. Similarly, we present a 2.4% measurement of the transverse comoving distance to the same redshift, Gpc. Together with other DESI BAO measurements at lower redshifts, these results are used in a companion paper to constrain cosmological parameters
DESI 2024 IV: Baryon Acoustic Oscillations from the Lyman Alpha Forest
International audienceWe present the measurement of Baryon Acoustic Oscillations (BAO) from the Lyman- (Ly) forest of high-redshift quasars with the first-year dataset of the Dark Energy Spectroscopic Instrument (DESI). Our analysis uses over Ly forest spectra and their correlation with the spatial distribution of more than quasars. An essential facet of this work is the development of a new analysis methodology on a blinded dataset. We conducted rigorous tests using synthetic data to ensure the reliability of our methodology and findings before unblinding. Additionally, we conducted multiple data splits to assess the consistency of the results and scrutinized various analysis approaches to confirm their robustness. For a given value of the sound horizon (), we measure the expansion at with 2% precision, km/s/Mpc. Similarly, we present a 2.4% measurement of the transverse comoving distance to the same redshift, Gpc. Together with other DESI BAO measurements at lower redshifts, these results are used in a companion paper to constrain cosmological parameters
DESI 2024 IV: Baryon Acoustic Oscillations from the Lyman Alpha Forest
International audienceWe present the measurement of Baryon Acoustic Oscillations (BAO) from the Lyman- (Ly) forest of high-redshift quasars with the first-year dataset of the Dark Energy Spectroscopic Instrument (DESI). Our analysis uses over Ly forest spectra and their correlation with the spatial distribution of more than quasars. An essential facet of this work is the development of a new analysis methodology on a blinded dataset. We conducted rigorous tests using synthetic data to ensure the reliability of our methodology and findings before unblinding. Additionally, we conducted multiple data splits to assess the consistency of the results and scrutinized various analysis approaches to confirm their robustness. For a given value of the sound horizon (), we measure the expansion at with 2% precision, km/s/Mpc. Similarly, we present a 2.4% measurement of the transverse comoving distance to the same redshift, Gpc. Together with other DESI BAO measurements at lower redshifts, these results are used in a companion paper to constrain cosmological parameters