نتایج جستجو برای: blanquet combined abundance

تعداد نتایج: 453737  

2005
Joël M. Durant Dag Ø. Hjermann Tycho Anker-Nilssen Grégory Beaugrand Atle Mysterud Nathalie Pettorelli

Joël M. Durant, Dag Ø. Hjermann, Tycho Anker-Nilssen, Grégory Beaugrand, Atle Mysterud, Nathalie Pettorelli and Nils Chr. Stenseth* Abstract Climatic changes are disrupting otherwise tight trophic interactions between predator and prey. Most of the earlier studies have primarily focused on the temporal dimension of the relationship in the framework of the match–mismatch hypothesis. This hypothe...

2012
STEPHANIE A. LINDE STEVEN D. ROBERTS WILLIAM R. CLARK

We combined observations of bobcats (Lynx rufus) from bowhunters with remotely-sensed data to build models that describe habitat and relative abundance of this species in the agricultural landscape of Iowa, USA. We calculated landscape composition and configuration from publicly available land cover, census, road, hydrologic, and elevation data. We used multiple regression models to examine cou...

Journal: :American journal of botany 2016
J Arvid Ågren Hui-Run Huang Stephen I Wright

PREMISE OF THE STUDY Shifts in ploidy affect the evolutionary dynamics of genomes in a myriad of ways. Population genetic theory predicts that transposable element (TE) proliferation may follow because the genomewide efficacy of selection should be reduced and the increase in gene copies may mask the deleterious effects of TE insertions. Moreover, in allopolyploids, TEs may further accumulate b...

2005
Zhaofei Fan David R. Larsen

In central hardwood forests, mean cavity-tree abundance increases with increasing standsize class (seedling/sapling, pole, sawtimber, old-growth). However, within a size class, the number of cavity trees is highly variable among 0.1-ha inventory plots. Plots in young stands are most likely to have no cavity trees, but some plots may have more than 50 cavity trees/ha. Plots in old-growth stands ...

Journal: :Acta Biologica Sibirica 2021

The syntaxonomic analysis of pine forests with Acer negundo occurring on fluvio-glacial sandy deposits Altai Krai (South-East Siberia) was made based 93 releves. It established that takes a different phytocenotic part in 2 associations, variants, and 6 no-ranked communities 4 classes orders according to the Braun-Blanquet approach. method detrended correspondence (DCA coordination) implemented ...

Journal: :Ecosphere 2023

Dominant plant species are locally abundant and have large impacts on ecological communities via a variety of mechanisms. However, few studies evaluated the influence dominant both within among trophic levels key ecosystem functions such as productivity. In this study, we effect Solidago canadensis arthropod in an old-field southeastern Michigan. We found that S. negatively correlated with rich...

Journal: :Chemical communications 2007
Hans J Jakobsen Anders R Hove Henrik Bildsøe Jørgen Skibsted Michael Brorson

We report the first (33)S chemical shift anisotropy (CSA) data as obtained from a combined determination of (33)S CSA and quadrupole coupling parameters utilizing the observation of both the (33)S (I = 3/2) central and satellite transitions in a natural abundance (33)S MAS NMR study aimed at characterizing the two important tetrathiometallates (NH4)(2)MoS(4) and (NH4)(2)WS(4).

Journal: :Nucleic Acids Research 2005
L. Li D. Techel N. Gretz A. Hildebrandt

We have designed a novel transcriptome subtraction method for the genome-scale analysis of differential gene expression in highly complex eukaryotes, in which suppression subtractive hybridization (SSH) is performed first to enrich the target and, after exchange of adapters, negative subtraction chain (NSC) is then used to eliminate the remaining background. NSC evolved from differential subtra...

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