Results 81 to 90 of about 4,122,773 (336)

Network topology drives population temporal variability in experimental habitat networks

Population Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source

On the impact of wave-like disturbances on turbulent fluxes and turbulence statistics in nighttime conditions: a case study [PDF]

Biogeosciences, 2013
The interpretation of flux measurements in nocturnal conditions is typically fraught with challenges. This paper reports on how the presence of wave-like disturbances in a time series, can lead to an overestimation of turbulence statistics, errors when ...
D. J. Durden, C. J. Nappo, M. Y. Leclerc, H. F. Duarte, G. Zhang, M. J. Parker, R. J. Kurzeja   +6 more
doaj   +1 more source

Geographic variation in walking activity in the red flour beetle Tribolium castaneum

Population Ecology, EarlyView.
This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley   +1 more source

Limit theorems for nonparametric conditional U-statistics smoothed by asymmetric kernels

AIMS Mathematics
$ U $-statistics represent a fundamental class of statistics used to model quantities derived from responses of multiple subjects. These statistics extend the concept of the empirical mean of a $ d $-variate random variable $ X $ by considering sums over
Salim Bouzebda, Amel Nezzal, Issam Elhattab   +2 more
doaj   +1 more source

An Edgeworth Expansion for $U$-Statistics

The Annals of Statistics, 1980
It is shown that, under some regularity conditions on the kernel, a one-sample $U$-statistic with kernel of degree two admits an asymptotic expansion with remainder term $o(N^{-1})$.
Callaert, H., Janssen, P., Veraverbeke, N.   +2 more
openaire   +3 more sources

occumb: An R package for site occupancy modeling of eDNA metabarcoding data

Population Ecology, EarlyView.
This study introduces a new R package, occumb, for the convenient application of site occupancy modeling using environmental DNA (eDNA) metabarcoding data. We outline a data analysis workflow, including data setup, model fitting, model assessment, and comparison of potential study settings based on model predictions, all of which can be performed using
Keiichi Fukaya, Yuta Hasebe
wiley   +1 more source

Urinary Podocalyxin as a Biomarker to Diagnose Membranous Nephropathy. [PDF]

PLoS ONE, 2016
BACKGROUND:A non-invasive diagnostic marker of membranous nephropathy (MN) is desirable. The urinary level of podocalyxin (PCX) is higher in various glomerular diseases, including MN.
Takahiro Imaizumi, Masahiro Nakatochi, Shin'ichi Akiyama, Makoto Yamaguchi, Hiroyuki Kurosawa, Yoshiaki Hirayama, Takayuki Katsuno, Naotake Tsuboi, Masanori Hara, Shoichi Maruyama   +9 more
doaj   +1 more source

Limit theorems for U-statistics of Bernoulli data [PDF]

, 2019
In this paper, we consider U-statistics whose data is a strictly stationary sequence which can be expressed as a functional of an i.i.d. one. We establish a strong law of large numbers, a bounded law of the iterated logarithms and a central limit theorem
D. Giraudo
semanticscholar   +1 more source

Social context prevents heat hormetic effects against mutagens during fish development

FEBS Letters, EarlyView.
This study shows that sublethal heat stress protects fish embryos against ultraviolet radiation, a concept known as ‘hormesis’. However, chemical stress transmission between fish embryos negates this protective effect. By providing evidence for the mechanistic molecular basis of heat stress hormesis and interindividual stress communication, this study ...
Lauric Feugere, Claudio Silva De Freitas, Adam Bates, Kenneth B. Storey, Pedro Beltran‐Alvarez, Katharina C. Wollenberg Valero   +5 more
wiley   +1 more source

Protonophore activity of short‐chain fatty acids induces their intracellular accumulation and acidification

FEBS Letters, EarlyView.
The protonated form of butyrate, as well as other short‐chain fatty acids (SCFAs), is membrane permeable. In acidic extracellular environments, this can lead to intracellular accumulation of SCFAs and cytosolic acidification. This phenomenon will be particularly relevant in acidic environments such as the large intestine or tumor microenvironments ...
Muwei Jiang, Frans Bianchi, Geert van den Bogaart   +2 more
wiley   +1 more source