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Questions related from Valérie Coudrain
I have a data set of species abundances with different taxonomic groups measured in different units. I would like to add the abundances of some of these groups into a single variable. I think I...
11 November 2014 5,159 26 View
Papers about the temporal dynamics of species communities are scarce, certainly because most studies considering species communities are conducted over only a single or few years. Do you think it...
09 September 2014 8,910 16 View
I conducted a Constrained Analysis of Principal Coordinates (CAP) to analyse species composition in relation to environmental factors. I found a significant effect and I would like to go deeper by...
11 November 2013 734 32 View
For me the difference between both would be that the kleptoparasite only consume food provisions of the (developing) host without directly killing host, whereas the kleptoparasitoid would consume...
10 October 2013 8,998 5 View
I would like to observe the behavior of some insects at night using infrared light, but I fear that infrared attracts insects and thus biases observations. Has anybody used this method?
10 October 2013 1,253 11 View
I am looking for a possibility to survey insects in the field using video cameras, possibly also at night. Does anybody have some good or bad experience with this kind of survey and some...
09 September 2013 9,074 6 View
Bees may rely on different flower resources that are only temporally available. Therefore mapping the amount of the different used flower types may not provide a correct assessment of the...
07 July 2013 6,875 15 View
I would like to investigate the effect of an environmental factor simultaneously on a species abundance matrix and a functional trait related to these species. To be clearer: I have sampled...
02 February 2013 6,836 56 View
I am studying host-parasitoid interaction networks and I computed different indices that are common in food web studies such as linkage density, connectance, generality, orinteraction diversity....
02 February 2013 7,803 10 View
I would like to know if the diet of a species corresponds to the food availability in the landscape, or if some food items are over-represented in the diet. Does anyone know a good method? I...
12 December 2012 8,223 29 View
I've recently read about the possibility to substract a distance matrix from one year from the distance matrix from a previous year to analyze temporal changes in species communities. Does anybody...
11 November 2012 9,745 13 View
I would like to know if it is meaningful to compare species diversity and eveness between sites that range from 3 individuals to up to several hundred individuals. Especially for eveness, I have...
10 October 2012 8,012 51 View
I sampled a community of insects in different sites in three years and I would like to calculate the between site and between year differences respective change in species composition. I do not...
09 September 2012 5,406 45 View
