scholarly journals Functional diversity plays a role in driving β-diversity: Or does it?

2019 ◽  
Author(s):  
David Murray-Stoker
Keyword(s):  
Model Selection ◽  
Path Analysis ◽  
Functional Diversity ◽  
Environmental Variation ◽  
Species Pool ◽  
Β Diversity ◽  
Theory And Modeling

AbstractPatrick and Brown (2018) suggest that functional diversity of the species pool has an important role in generating β-diversity. Using a combination of path analysis and model selection, they ostensibly provide support for this hypothesis; however, they neglected to put theory and modeling into proper ecological and statistical context. Here, I present a re-analysis of their data. I conclude that the drivers of β-diversity are variable, with functional diversity typically having a reduced, if any, role compared to consistently stronger roles played by γ-diversity or environmental variation on structuring β-diversity.

Species Pool Functional Diversity Plays a Hidden Role in Generating β-Diversity

2018 ◽  
Vol 191 (5) ◽  
pp. E159-E170 ◽  
Author(s):  
Christopher J. Patrick ◽  
Bryan L. Brown
Keyword(s):  
Functional Diversity ◽  
Species Pool ◽  
Β Diversity

scholarly journals Military L2 immersion

2017 ◽  
Vol 8 (2) ◽  
pp. 273-287
Author(s):  
Laszlo Vincze ◽  
Nick Joyce ◽  
Kimmo Vehkalahti
Keyword(s):  
Model Selection ◽  
Longitudinal Data ◽  
Path Analysis ◽  
Military Service ◽  
Bayesian Model ◽  
Selection Procedure ◽  
Ideal Self ◽  
L2 Proficiency ◽  
Cross Sectional ◽  
Positive Attitudes

Abstract The purpose of the present study was to examine some of the motivations and longitudinal consequences of military service in L2 Swedish for L1 Finnish conscripts in Finland’s only Swedish language garrison. Cross-sectional data (N = 42), analyzed with Bayesian path analysis, indicates that promotional instrumentality enhanced participants’ L2 ideal selves, but integrative orientation did not. The L2 ideal self predicts L2 learning intentions in the army, but only among learners with low L2 proficiency at the beginning of military service. Longitudinal data (N = 17), analyzed with a Bayesian model selection procedure, shows that after six months in the army, participants reported higher levels of L2 proficiency, lower levels of L2 use anxiety and more positive attitudes towards L2 speakers than at the beginning of military service.

scholarly journals Functional diversity underlies demographic responses to environmental variation in European forests

2016 ◽  
Vol 26 (2) ◽  
pp. 128-141 ◽  
Author(s):  
Paloma Ruiz-Benito ◽  
Sophia Ratcliffe ◽  
Alistair S. Jump ◽  
Lorena Gómez-Aparicio ◽  
Jaime Madrigal-González ◽  
...  
Keyword(s):  
Functional Diversity ◽  
Environmental Variation ◽  
European Forests ◽  
Demographic Responses

scholarly journals Responses of Free-Living Vibrio Community to Seasonal Environmental Variation in a Subtropical Inland Bay

2020 ◽  
Vol 11 ◽  
Author(s):  
Xing Chen ◽  
Huaxian Zhao ◽  
Gonglingxia Jiang ◽  
Jinli Tang ◽  
Qiangsheng Xu ◽  
...  
Keyword(s):  
Inorganic Nitrogen ◽  
Environmental Variation ◽  
Mantel Test ◽  
Beibu Gulf ◽  
Test Analysis ◽  
Dissolved Phosphorus ◽  
Dissolved Nitrogen ◽  
Β Diversity ◽  
Total Dissolved Nitrogen ◽  
Filtering Effect

Vibrio are widely distributed in aquatic environments and strongly associated with eutrophic environments and human health through the consumption of contaminated seafood. However, the response of the Vibrio community to seasonal variation in eutrophic environments is poorly understood. In this study, we used a Vibrio-specific 16S rRNA sequencing approach to reveal the seasonal distribution pattern and diversity of the Vibrio community in the Maowei Sea, Beibu Gulf of China. The Shannon diversity of the Vibrio community was highest in the summer, while β-diversity analysis showed that Vibrio community structures were significantly different between seasons. Distance-based redundancy analysis (dbRDA) and Mantel test analysis suggested that total dissolved nitrogen (TDN), total dissolved phosphorus (TDP), dissolved inorganic nitrogen (DIN), salinity, and temperature were the key environmental factors shaping the Vibrio community structure, indicating a strong filtering effect of trophic condition on Vibrio communities. Furthermore, through random forest analysis, V. fluvialis, V. alginolyticus, V. proteolyticus, V. splendidus, and the other eight Vibrio species were more sensitive to eutrophic changes. This study revealed seasonal changes in Vibrio communities and the influence of environmental variation on Vibrio community composition, contributing to a better understanding of their potential ecological roles in a subtropical inland bay.

scholarly journals Diversity Patterns of Different Life Forms of Plants along an Elevational Gradient in Crete, Greece

Diversity ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 200 ◽  
Author(s):  
Maria Lazarina ◽  
Athanasios Charalampopoulos ◽  
Maria Psaralexi ◽  
Nikos Krigas ◽  
Danai-Eleni Michailidou ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Large Scale ◽  
Regional Scale ◽  
Elevational Gradient ◽  
Life Forms ◽  
Species Pool ◽  
Diversity Patterns ◽  
Β Diversity ◽  
Α Diversity

Elevational gradients provide a unique opportunity to explore species responses to changing environmental conditions. Here, we focus on an elevational gradient in Crete, a climate-vulnerable Mediterranean plant biodiversity hotspot and explore the diversity patterns and underlying mechanisms of different plant life forms. We found that the significant differences in life forms’ elevational and environmental ranges are reflected in α- diversity (species richness at local scale), γ-diversity (species richness at regional scale) and β-diversity (variation in species composition). The α- and γ-diversity decreased with elevation, while β-diversity followed a hump-shaped relationship, with the peak varying between life forms. However, β-deviation (deviation from null expectations) varied significantly with elevation but was life formindependent. This suggests that species composition is shaped by the size of the available species pool which depends on life form, but also by other deterministic or stochastic processes that act in a similar way for different life forms. The strength of these processes varies with elevation, with hotter–drier conditions and increased human activities filtering species composition at lowlands and large-scale processes determining the species pool size overriding local ecological processes at higher elevations.

Species pool and local ecological assembly processes shape the β-diversity of diazotrophs in grassland soils

2021 ◽  
pp. 108338
Author(s):  
Yansu Wang ◽  
Chaonan Li ◽  
Bo Tu ◽  
Yongping Kou ◽  
Xiangzhen Li
Keyword(s):  
Species Pool ◽  
Grassland Soils ◽  
Β Diversity

scholarly journals Effects of Fishing and Regional Species Pool on the Functional Diversity of Fish Communities

PLoS ONE ◽  
2012 ◽  
Vol 7 (8) ◽  
pp. e44297 ◽  
Author(s):  
Gustavo M. Martins ◽  
Francisco Arenas ◽  
Ana I. Neto ◽  
Stuart R. Jenkins
Keyword(s):  
Functional Diversity ◽  
Fish Communities ◽  
Species Pool ◽  
Regional Species Pool

scholarly journals Profiling the Functional Diversity of Termite Mound Soil Bacteria as Revealed by Shotgun Sequencing

Genes ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 637 ◽  
Author(s):  
Ben Jesuorsemwen Enagbonma ◽  
Bukola Rhoda Aremu ◽  
Olubukola Oluranti Babalola
Keyword(s):  
Functional Diversity ◽  
Chemical Properties ◽  
Shotgun Sequencing ◽  
Functional Categories ◽  
Termite Mound ◽  
Β Diversity ◽  
Α Diversity ◽  
Significant Difference ◽  
Commercial Applications ◽  
Physical And Chemical

Profiling the metabolic processes performed by bacteria is vital both for understanding and for manipulating ecosystems for industrial or research purposes. In this study we aim to assess the bacterial functional diversity in termite mound soils with the assumption that significant differences will be observed in the functional diversity of bacteria between the termite mound soils and their surrounding soils and that each environment has a distinguishing metabolic profile. Here, metagenomic DNA extracted from termite mound soils and their corresponding surrounding soils, which are 10 m apart, were sequenced using a shotgun sequencing approach. Our results revealed that the relative abundances of 16 functional categories differed significantly between both habitats. The α diversity analysis indicated no significant difference in bacterial functional categories within the habitats while the β diversity showed that the bacterial functional categories varied significantly between the termite mound soils and the surrounding soil samples. The variations in soil physical and chemical properties existing between the two environments were held accountable for the differences in bacterial functional structure. With the high relative abundance of functional categories with unknown function reported in this study, this could signify the likelihood of getting novel genes from termite mound soils, which are needed for research and commercial applications.

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