Sentences with phrase «species abundance»

Human impact on biodiversity is usually measured by decreases in species abundance or richness.

For this study, Passy developed a novel conceptual framework explaining the variability in species abundance distribution as a function of two gradients — environmental favorability and species stress tolerance.

One of the most popular explanations for species abundance holds that seemingly homogeneous habitats consist of many niches.

«With the business as usual scenario, roughly half of the Amazon will be deforested in 2050, leading to similar losses in mean species abundances.»

Benin also had significant increases in mammal species abundance.»

«Under benign conditions, both tolerant and sensitive groups can reproduce and grow in numbers, giving rise to a much more equitable species abundance distribution with low disparity between common and rare species.»

For instance, the Human Microbiome Project (HMP)(Turnbaugh et al, 2007; Peterson et al, 2009; Huttenhower et al, 2012) and MetaHIT (Qin et al, 2010) have generated maps of bacterial species abundances throughout the human body, reference genomes, and catalogs of more than 100 million microbial genes assembled from shotgun sequencing of in vivo communities.

Sediment from ice cores have been used to look at species abundances 2000 years before present and to track previous extinctions associated with glacial events.

For more than two decades this dedication to hawk counting and conservation has helped capture the bigger picture of raptor species abundance and migration patterns.

I think this paper, and a few others like it that have been published in recent years, indicate that the response of differernt coccolithophore species to changing CO2 is species dependent and more studies will be required to determine how these responses from different species might cause a shift in species abundances in the oceans and the ecosystem as a whole.

Notable differences in species abundance were found between the three groups, including — caries - free: Streptococcus intermedius and Capnocytophaga; restored disease: Actinomyces odontolyticus and Streptococcus australis; and «untreated» disease: Streptococcus mutans.

They believe that the fluctuations in species abundance may herald an overall transformation of the lake ecosystem.

As a result, the species abundance distribution becomes highly unequal with a few species dominating the community and most species remaining rare» Passy said.

«If the environment drives the species abundance distribution, then we can also start predicting which species may become extinct and move to protect them, which is a vital step forward,» Khaledi said.

Even in the well - studied human gut microbiome, it was estimated, on average, 43 % of species abundance could not be captured by available microbial reference analysis methods.

(A firmer conclusion would be that reducing the planet's species abundance and richness can not be good for H. sapiens.)