New to R

Hai Mary,

afaik there is no "Indval" package.

Have a look at indval() in the labdsv package and the indicspecies package.

Edi


Am 28.06.2011 09:45, schrieb mary anto:

Dear Group,



I am new to R and I was wondering if someone could  suggest the appropriate
   R package  for my analysis.

I  have sampled 166  butterfly species present/sighted  along       line
transects  distributed across  5 habitat types in 3 locations during  August
2008 to May 2011 (area located in the Western Ghats biodiversity hotspot),.

  I would like to find out species indicative of  particular habitats. I plan
to use the  Indval  package. Any other suggestions or comments?

Thanks,

Mary Anto


Project Scientist

Forest Entomology

Division of Forest Health

Kerala Forest Research Institute

Peechi, Thrisur, Kerala

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Hi everyone,

I've been asked a few times about how to test for synchrony of
ecological events.  In one case, a researcher has more than a decade of
acorn mast data for several species of oaks and wants to know if
different oaks have synchronous mast years when sympatric.  The other
case, a researcher wants to know if frog calling intensity is
synchronous across a number of ponds. I thought I would first take a
stab at looking at synchrony broadly then I would dig deeper and look at
synchrony and spatial effects.

Any suggestions how to get started?  

Many thanks,

Jeff
*****************************************
Jeffrey A. Stratford, Ph.D.
Department of Health and Biological Sciences
84 W. South St.
Wilkes Univertsity, PA 18766
570-332-2942
http://web.wilkes.edu/jeffrey.stratford/

Hi Jeff

I don't know about any specific test for synchrony as there are many ways of looking at the problem. But there's plenty of literature looking at modelling of synchrony in the aquatic environment which would hopefully help you get started.

e.g. for starters try:

Rusak J.A., Yan N.D. & Somers K.M. (2008) Regional climatic drivers of synchronous zooplankton dynamics in north-temperate lakes. Canadian Journal of Fisheries and Aquatic Sciences 65, 878-889.

Rusak J.A., Yan N.D., Somers K.M. & McQueen D.J. (1999) The Temporal Coherence of Zooplankton Population Abundances in Neighboring North-Temperate Lakes. American Naturalist 153, 46-58.

Zuur A.F. & Pierce G.J. (2004) Common trends in northeast Atlantic squid time series. Journal of Sea Research 52, 57-72.

Regards
Mike


-----Original Message-----
From: r-sig-ecology-bounces at r-project.org [mailto:r-sig-ecology-bounces at r-project.org] On Behalf Of Stratford, Jeffrey
Sent: 30 June 2011 00:18
To: r-sig-ecology at r-project.org
Subject: [R-sig-eco] testing for synchrony

Hi everyone,

I've been asked a few times about how to test for synchrony of
ecological events.  In one case, a researcher has more than a decade of
acorn mast data for several species of oaks and wants to know if
different oaks have synchronous mast years when sympatric.  The other
case, a researcher wants to know if frog calling intensity is
synchronous across a number of ponds. I thought I would first take a
stab at looking at synchrony broadly then I would dig deeper and look at
synchrony and spatial effects.

Any suggestions how to get started?  

Many thanks,

Jeff
*****************************************
Jeffrey A. Stratford, Ph.D.
Department of Health and Biological Sciences
84 W. South St.
Wilkes Univertsity, PA 18766
570-332-2942
http://web.wilkes.edu/jeffrey.stratford/

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R-sig-ecology at r-project.org
https://stat.ethz.ch/mailman/listinfo/r-sig-ecology

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