permanova

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    Unbalanced designs in PERMANOVA and Resampling Methods

    Dear all, I am a new member here, working mainly in Ecology. I hope this is the right section to ask my question. I am dealing with unbalanced designs (I am comparing groups with different sample sizes) in PERMANOVA (Permutational Multivariate Analysis of Variance). The PERMANOVA runs...
  2. Y

    Unbalanced designs in PERMANOVA and Resampling Methods

    Dear all, I am a new member and I have to say I am not sure if this is the right section for my question (I am working in ecology). I am dealing with unbalanced designs (I am comparing groups with different sample sizes) in PERMANOVA (Permutational Multivariate Analysis of Variance). The...
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    Have 4 dependent and 10 independent variables - which test should I use?

    Hi all, I'm interested in the potential effects of water pollution on feather color of a bird. For this, I calculated 4 color variables for each individual (brightness, hue, blue chroma and UV chroma), which are my 4 dependent variables. My independent variables (explanatory) are the...
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    How to run an unbalanced Permanova in Primer

    Dear all, I have data on disease occurrences in coral reefs. I have the following factors: Exposure (fixed, two levels: outer and inner) and Site (random and nested in Exposure with three levels for outer and two levels for inner). At each site, I have four transects except at one of the...
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    Option for post-hoc test after permanova for community data?

    Hi there, Thank you for reading my post and hopefully someone can provide me with some help! For my master's thesis, I have used microbial community identification with QIIME. I have 47 samples spread over 4 different treatments and 4 different time points (2 different years and 2...
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    what stats to use?

    Dear All, As I am not experienced in stats I would like to ask for some stats suggestions for a study. study one: control impact with one impacted site and one reference site. Two species and biometrics taken. I need to see if the the impacted site increases biometrics. study two...
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    Permanova using adonis, comparing a focus group with the rest (all other groups)

    Dear all I would like to compare the community composition of a certain region, against the composition of the neighbouring regions. This is an attempt to validate the ecoregion itself (its species composition is significantly different from that of its neighbours, or needs to be reassessed...
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    Permanova + T-test

    Hello, I have a question regarding the data analysis listed below. I am trying to run a similar study but I can't truly understand why a PERMANOVA was used. Any help would be greatly appreciated. In my study, I am comparing prey species composition, abundance, pecking rate, and swimming...
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    PERMANOVA vs GAMM

    Dear all, I have been looking everywhere for answers (forums, books, websites etc.) but I am still struggling with a few statistical questions. I hope this forum will help me get some answers! My research question deals with diseases affecting benthic organisms. We conducted 6...
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    [R] permanova for multivariate repeat measures toxicology data set

    Hello, I would like to use a permanova to analyze my repeated measures, multivariate data set using the package vegan (adonis function) in R. I have several explanatory variables and many clinical biochemistry/hematological response variables (all continuous, non-normally distributed). I...
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    perMANOVA using Adonis in Program R (DF and Multiple Comparisions)

    Hello there, I’ve been having some concerns with the degrees of freedom R has been giving me from PERMANOVA (adonis), and I was hoping someone could shed some light on this. I have been looking over my R books and manuals, general statistics books for calculating DF, and surfed the stats...
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    Complex PERMANOVA mixed model nested design in PRIMER

    Hi All, I am trying to use a complex ANOVA design with the Permanova function in PRIMER. I have been working on this for a while with no significant progress, so any ideas or help would be greatly appreciated. The SAS code for my design is: proc mixed data=treatment; class Gap Wood...
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    PERMANOVA - choice of distance measure

    Hi, I want to run a (PRIMER based) PERMANOVA analysis on my univariate data (output var.= weight of organisms, and 3 factors = 2 fixed, 1 random) and I'm wondering which distance measure (Bray-Curtis or Euclidean distance) to use to create the resemblance matrix. In most literature that I...
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    [Primer-E] Behaviours- PCA then ANOVA on factor scores, or PERMANOVA on original data

    Hello, I am hoping someone could give me some advice on an approach to analysing my data. I have a set of behavioural data (39 behavioural variables such as time spent foraging, number of foraging bouts, time spent vigilant etc), which were measured for 34 sites over 3 nights. Each of the 34...
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    PERMANOVA in R adonis function

    Please ignore question no longer need help - thank you for all of your responses!