Results 31 to 40 of about 95,404 (302)

Moving in the Dark: Enlightening the Spatial Population Ecology of European Cave Salamanders

Population Ecology, EarlyView.
We assessed individual interactions, movement ecology and activity patterns of a subterranean population of Speleomantes strinatii, applying spatial capture–recapture modeling to a photographic dataset of 104 individuals. ABSTRACT Space use and movement are fundamental aspects of organisms' ecology, mirroring individual fitness, behavior, and life ...
Giacomo Rosa, Andrea Costa, Sebastiano Salvidio   +2 more
wiley   +1 more source

The Evolution of Stellar X-Ray Activity and Angular Momentum as Seen by eROSITA, TESS, and Gaia

The Astrophysical Journal Letters
We have assembled a sample of ∼8200 stars with spectral types F5V–M5V, all having directly measured X-ray luminosities from eROSITA and rotation periods from TESS and having empirically estimated ages via their membership in stellar clusters and groups ...
Keivan G. Stassun, Marina Kounkel
doaj   +1 more source

Masses of subgiant stars from asteroseismology using the coupling strengths of mixed modes

, 2012
Since few decades, asteroseismology, the study of stellar oscillations, enables us to probe the interiors of stars with great precision. It allows stringent tests of stellar models and can provide accurate radii, masses and ages for individual stars.
Aizenman, Bedding, Bedding, Bedding, Christensen-Dalsgaard, Eggleton, Gough, Grevesse, Kjeldsen, Kurucz, Mathur, Metcalfe, Osaki, Rogers, Stello, Stello, Vandakurov   +16 more
core   +1 more source

Infection Models for Pine Wilt Disease on the Basis of Vector Behaviors

Population Ecology, EarlyView.
Infection models for pine wilt disease without vector density were built to estimate the transmission coefficient of the pathogenic nematode. The models successfully simulated the annual change in the density of infected trees for four pine stands. ABSTRACT Pine wilt disease is caused by the pinewood nematode (Bursaphelenchus xylophilus Steiner et ...
Katsumi Togashi
wiley   +1 more source

Star formation properties of galaxy cluster A1767

, 2015
Abell 1767 is a dynamically relaxed, cD cluster of galaxies with a redshift of 0.0703. Among 250 spectroscopically confirmed member galaxies within a projected radius of 2.5r_{200}, 243 galaxies (~ 97%) are spectroscopically covered by the Sloan Digital ...
Li, Feng, Yan, Peng-Fei, Yuan, Qi-Rong
core   +1 more source

The double sub-giant branch of NGC 6656 (M22): a chemical characterization [PDF]

, 2012
We present an abundance analysis of 101 subgiant branch (SGB) stars in the globular cluster M22. Using low resolution FLAMES/GIRAFFE spectra we have determined abundances of the neutron-capture strontium and barium and the light element carbon.
A. Aparicio, A. F. Marino, A. P. Milone, Alonso, Anderson, Anderson, Arlandini, Bekki, Bekki, Bellini, Bergemann, C. Sneden, Carretta, Carretta, Carretta, Casagrande, Cassisi, Charbonnel, Clampin, Cohen, Collet, Collet, Cristallo, Da Costa, Da Costa, de Mink, Decressin, Dickens, D’Antona, D’Antona, D’Antona, D’Ercole, Ferraro, Freeman, G. Piotto, G. Wallerstein, Gallagher, Gratton, Gratton, Gray, Harris, Hill, I. U. Roederer, Johnson, K. Lind, Kappeler, Kraft, Kurucz, Lee, Lodders, M. Asplund, M. Bergemann, M. Hilker, M. Zoccali, Mandushev, Marcolini, Marino, Marino, Marino, Marino, Marino, Mashonkina, Milone, Milone, Milone, Momany, Norris, P. B. Stetson, Pasquini, Pasquini, Peterson, Piotto, R. L. Bedin, R. P. Kraft, Ramírez, Richter, Roederer, S. Cassisi, Sbordone, Short, Simmerer, Sirianni, Sneden, Sollima, Stetson, Stetson, Straniero, Suntzeff, Sweigart, The, Ventura, Ventura, Y. Momany, Yong, Yong, Yong   +95 more
core   +2 more sources

Speciation Through the Lens of Population Dynamics: A Theoretical Primer on How Small and Large Populations Diverge

Population Ecology, EarlyView.
Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi, Hidaka Kubo, Tokuya Ogawa, Hayate Omura   +3 more
wiley   +1 more source

Relations of Rotation and Chromospheric Activity to Stellar Age for FGK Dwarfs from Kepler and LAMOST

The Astrophysical Journal Supplement Series
The empirical relations between rotation period, chromospheric activity, and age can be used to estimate stellar age. To calibrate these relations, we present a catalog, including the masses and ages of 52,321 FGK dwarfs, 47,489 chromospheric activity ...
Lifei Ye, Shaolan Bi, Jinghua Zhang, Tiancheng Sun, Liu Long, Zhishuai Ge, Tanda Li, Xianfei Zhang, Xunzhou Chen, Yaguang Li, Jianzhao Zhou, Maosheng Xiang   +11 more
doaj   +1 more source

Microbial exopolysaccharide production by polyextremophiles in the adaptation to multiple extremes

FEBS Letters, EarlyView.
Polyextremophiles are microorganisms that endure multiple extreme conditions by various adaptation strategies that also include the production of exopolysaccharides (EPSs). This review provides an integrated perspective on EPS biosynthesis, function, and regulation in these organisms, emphasizing their critical role in survival and highlighting their ...
Tracey M Gloster, Ebru Toksoy Öner
wiley   +1 more source

The California Legacy Survey. VI. The Fate of Activity Cycles in Sun-like Stars

The Astronomical Journal
We analyze the spectra of 91 solar-type G- and K-type main-sequence dwarfs in the solar neighborhood to assess activity trends with stellar properties.
Howard Isaacson, Stephen R. Kane, Brad Carter, Andrew W. Howard   +3 more
doaj   +1 more source