Functional estimation of diversity profiles

2020 ◽  
Vol 31 (8) ◽  
Author(s):  
Francesca Fortuna ◽  
Stefano Antonio Gattone ◽  
Tonio Di Battista
Keyword(s):  
Functional Estimation ◽  
Diversity Profiles

scholarly journals Functional Estimation of Plate Type Evaporator with Communication Wick for Two-Phase Fluid Loop in Space

2006 ◽  
Vol 72 (719) ◽  
pp. 1781-1788
Author(s):  
Haruo KAWASAKI ◽  
Ryoji IMAI ◽  
Kanji OHONISHI ◽  
Kengou OHKUBO ◽  
Terushige FUJII
Keyword(s):  
Two Phase ◽  
Functional Estimation ◽  
Phase Fluid ◽  
Plate Type

scholarly journals Functional estimation of extreme conditional expectiles

2021 ◽  
Author(s):  
Stéphane Girard ◽  
Gilles Stupfler ◽  
Antoine Usseglio-Carleve
Keyword(s):  
Functional Estimation

scholarly journals Dramatic differences in gut bacterial densities help to explain the relationship between diet and habitat in rainforest ants

2017 ◽  
Author(s):  
Jon G Sanders ◽  
Piotr Lukasik ◽  
Megan E Frederickson ◽  
Jacob A Russell ◽  
Ryuichi Koga ◽  
...  
Keyword(s):  
16S Rrna ◽  
Microbial Diversity ◽  
Tropical Rainforest ◽  
Amplicon Sequencing ◽  
Sequencing Data ◽  
Lowland Tropical Forest ◽  
16S Rrna Amplicon Sequencing ◽  
Microbial Symbionts ◽  
Microbial Symbiosis ◽  
Diversity Profiles

AbstractAbundance is a key parameter in microbial ecology, and important to estimates of potential metabolite flux, impacts of dispersal, and sensitivity of samples to technical biases such as laboratory contamination. However, modern amplicon-based sequencing techniques by themselves typically provide no information about the absolute abundance of microbes. Here, we use fluorescence microscopy and quantitative PCR as independent estimates of microbial abundance to test the hypothesis that microbial symbionts have enabled ants to dominate tropical rainforest canopies by facilitating herbivorous diets, and compare these methods to microbial diversity profiles from 16S rRNA amplicon sequencing. Through a systematic survey of ants from a lowland tropical forest, we show that the density of gut microbiota varies across several orders of magnitude among ant lineages, with median individuals from many genera only marginally above detection limits. Supporting the hypothesis that microbial symbiosis is important to dominance in the canopy, we find that the abundance of gut bacteria is positively correlated with stable isotope proxies of herbivory among canopy-dwelling ants, but not among ground-dwelling ants. Notably, these broad findings are much more evident in the quantitative data than in the 16S rRNA sequencing data. Our results help to resolve a longstanding question in tropical rainforest ecology, and have broad implications for the interpretation of sequence-based surveys of microbial diversity.

scholarly journals What are the main local drivers determining richness and fishery yields in tropical coastal fish assemblages?

2018 ◽  
Vol 35 ◽  
pp. 1-12
Author(s):  
Cynthia Diniz Souza ◽  
Vandick S. Batista ◽  
Nidia Noemi Fabré
Keyword(s):  
Wind Speed ◽  
Rainy Season ◽  
Fish Assemblages ◽  
Principal Component ◽  
Dry Season ◽  
Community Diversity ◽  
Tropical Species ◽  
Coastal Fish ◽  
Wide Range ◽  
Diversity Profiles

Seasonal ecological effects caused by temperature and photoperiod are typically considered minimal in the tropics. Nevertheless, annual climate cycles may still influence the distribution and abundance of tropical species. Here, we investigate whether seasonal patterns of precipitation and wind speed influence the structure of coastal fish assemblages and fishing yields in northeast Brazil. Research trips were conducted during the rainy and dry seasons using commercial boats and gear to sample the fish community. Diversity was analyzed using abundance Whittaker curves, diversity profiles and the Shannon index. Principal Component Analysis (PCA) was used to analyze associations between the abundance of species and various environmental variables related to seasonality. A total of 2,373 fish were collected, representing 73 species from 34 families – 20 of which were classified as both frequent and abundant. Species richness was greater and more equitable during the rainy season than the dry season – driven by changes in the precipitation rather than to wind speed. Species diversity profiles were slightly greater during the rainy season than the dry season, but this difference was not statistically significant. Using PCA was identified three groups of species: the first associated with wind speed, the second with precipitation, and the third with a wide range of sampling environments. This latter group was the largest and most ecologically heterogeneous. We conclude that tropical coastal fish assemblages are largely influenced by local variables, and seasonally mediated by annual changes related to precipitation intensity and wind speed, which in turn influences fishery yields.

Functional estimation of spatiotemporal heterogeneities

2007 ◽  
Vol 18 (7) ◽  
pp. 775-792 ◽  
Author(s):  
María D. Ruiz-Medina ◽  
José M. Angulo
Keyword(s):  
Functional Estimation
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