نتایج جستجو برای: evenness

تعداد نتایج: 1999  

Journal: : 2022

Purpose: To develop prognosis methodology for road pavement longitudinal evenness, depending on construction durability change (of wearing and ground roadbed) the basis of analysis existing practice relationship estimation between inner deformations undulation occurrence a pavement. Methods: Statistical analytical. Application Palmgren — Miner hypothesis dependence from actual allowable number ...

2014
C. L. Huffard S. von Thun A. D. Sherman K. Sealey K. L. Smith

Pelagic forms of the brown algae (Phaeophyceae) Sargassum spp. and their conspicuous rafts are defining characteristics of the Sargasso Sea in the western North Atlantic. Given rising temperatures and acidity in the surface ocean, we hypothesized that macrofauna associated with Sargassum in the Sargasso Sea have changed with respect to species composition, diversity, evenness, and sessile epibi...

2016
Lionel R. Hertzog Sebastian T. Meyer Wolfgang W. Weisser Anne Ebeling Han Y.H. Chen

Changes in producer diversity cause multiple changes in consumer communities through various mechanisms. However, past analyses investigating the relationship between plant diversity and arthropod consumers focused only on few aspects of arthropod diversity, e.g. species richness and abundance. Yet, shifts in understudied facets of arthropod diversity like relative abundances or species dominan...

2015
Michael A. Postow Manuarii Manuel Phillip Wong Jianda Yuan Zhiwan Dong Cailian Liu Solène Perez Isabelle Tanneau Marlène Noel Anaïs Courtier Nicolas Pasqual Jedd D. Wolchok

BACKGROUND Ipilimumab improves overall survival in a subset of patients with metastatic melanoma. Peripheral blood T cell receptor (TCR) repertoire diversity has been associated with favorable outcomes in patients with cancer, but its relevance as a biomarker for ipilimumab outcomes remains unknown. FINDINGS In this pilot study, we analyzed the pre-treatment peripheral blood TCR repertoire in...

Journal: :Applied and environmental microbiology 2004
Marek K Sliwinski Robert M Goodman

Microbial ecologists have discovered novel rRNA genes (rDNA) in mesophilic soil habitats worldwide, including sequences that affiliate phylogenetically within the division Crenarchaeota (domain Archaea). To characterize the spatial distribution of crenarchaeal assemblages in mesophilic soil habitats, we profiled amplified crenarchaeal 16S rDNA sequences from diverse soil ecosystems by using PCR...

2015
Ariane Ghekiere Benedicte Deforche Lieze Mertens Ilse De Bourdeaudhuij Peter Clarys Bas de Geus Greet Cardon Jack Nasar Jo Salmon Jelle Van Cauwenberg Jake Olivier

BACKGROUND Increasing participation in transportation cycling represents a useful strategy for increasing children's physical activity levels. Knowledge on how to design environments to encourage adoption and maintenance of transportation cycling is limited and relies mainly on observational studies. The current study experimentally investigates the relative importance of micro-scale environmen...

2016
Thomas P McKenna Kathryn A Yurkonis

Plant performance is determined by the balance of intra- and interspecific neighbors within an individual's zone of influence. If individuals interact over smaller scales than the scales at which communities are measured, then altering neighborhood interactions may fundamentally affect community responses. These interactions can be altered by changing the number (species richness), abundances (...

Journal: :international journal of advanced biological and biomedical research 2013
hamid ahani hamid jalilvand

forests are biologically diverse systems, representing some of the richest biological areas on earth. they offer a variety of habitats for plants, animals and micro-organisms. however, forest biodiversity is increasingly threatened as a result of deforestation, fragmentation, climate change and other stressors. biodiversity is the variation of life forms within a given ecosystem, biome, or on t...

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