HerbVar data summary 3 by Will Wetzel https://padlet.com/williamwetzel/pub8m4ml1clwntxs en-us 2021-08-05 03:27:03 UTC 2025-11-24 16:48:28 UTC hello@padlet.com https://padlet.net/icons/png/1f41b.png Rather than phylogeny per se, perhaps variability is modulated by host plant specialisation - whether that be degree of local/regional endemism or niche breadth... https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670542042 2021-08-06 01:13:04 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670542042 How is likely covariation between latitude and biome considered in the models? https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670544949 2021-08-06 01:15:41 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670544949 Very nice trend for GINI... appears to be sampling bias to latitudes around +30-50... accounted for in the model? https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670547736 2021-08-06 01:18:15 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670547736 Would be interesting to test interaction of latitude with altitude, especially as altitude will account for more local/regional climate variability. Likewise, productivity will be driven by regional climate (latitude) but also geological/soil context (do we have information for this?) https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670551285 2021-08-06 01:21:47 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670551285 Annual v Perennial? https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670552263 Is there the same pattern of higher variability among plants at higher latitudes for annuals? Wondering if the same plants get hit year after year -- i.e. higher variability among plants at higher latitudes is due to some plants that get hit repeatedly -- or if between growing seasons the plants who got hit last year do not get hit the next year. (I guess this would cause the pattern to appear more strongly in perennials then in annuals, or this is what I would predict.)]]> 2021-08-06 01:22:42 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670552263 May be hard to have same species across a wide range of latitudes but maybe congeners could be used to compare? kopturs https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670558555 2021-08-06 01:29:35 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670558555 What drivers GINI and herbivory responses to latitude? Might plant functional group covary with latitude, thus explaining the symmetry vs. asymmetry question? https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670558694 2021-08-06 01:29:41 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670558694 Also, specialisation being indexed by spatial distribution ... might predict that GINI increases as host plant distribution decreases? https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670560548 2021-08-06 01:31:36 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670560548 https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670561203 Is the survey sp native or exotic? Especially useful for the focal species. Could explain patterns of herbivory in the presence and absence of native suite of herbivores.]]> 2021-08-06 01:32:16 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670561203 Does latitudinal symmetry break down (or is maintained) for cosmopolitan species... or species like taraxacum now growing in latitudes where it is non-native? https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670562069 2021-08-06 01:33:11 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670562069 The diversity of herbivores explains latitudinal symmetry? filipeufla https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670563759 Could the symmetric shape curve for mean herbivory/variability among plants and leaves be related to the herbivore diversity? Higher diversity and abundance of herbivores near Equator means higher mean herbivory overall, but also lower variability among plants (more herbivore explore more plants/leaves)? ]]> 2021-08-06 01:34:47 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670563759 Given how strongly seasonal these sampling sites are, is the magnitude of increase in GINI really strong/meaningful (0.7-0.8)? https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670564796 2021-08-06 01:35:44 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670564796 Annual-perennial https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670565594 How does seasonal variability vary depending on whether plants are annual or perennial? 

]]> 2021-08-06 01:36:26 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670565594 drivers https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670570417 Of course herbivory is the joint outcome of plant and animal features, but looking at the Mean Herbivory vs Variation among Plants pattterns, I was curious about whether one metric could be more related to herbivores and the other one could be more related to plants. If forced to make a guess, I tend to think that the mean herbivory levels relate more to animals (population size = herbivory pressure) and Variation relates more to plant traits (local level). I would like to explore this, taking advantage of the fact that we got nice symmetrical patterns but we know that abiotic variables differ between the N and S hemispheres: more climatic variability and colder temperatures with latitude in the North (because contrasting size of land masses and the buffering effect of the sea). Will tell you whether something interesting pops up. (Ernesto Gianoli) ]]> 2021-08-06 01:41:07 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670570417 Need to summarize hypotheses related to latitudinal patterns in plant-herbivore systems https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670570508 so many hypotheses...]]> 2021-08-06 01:41:12 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670570508 Don't forget leaf longevity... perhaps using SLA as a surrogate for this... https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670570585 2021-08-06 01:41:17 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670570585 Leaf phenology https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670573004 It might be interesting to see if the variability differ in leaf phenology. For example, there may be herbivores that prefer young and soft leaves in the Spring, which may contribute to large variability. ]]> 2021-08-06 01:43:32 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670573004 Trop Moist Broadleaf Forests as outlier in variability among plants v Mean herbivory https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670582437 This really jumps out at me. Relatively high variability for its mean herbivory...why? 
And naively the habitat where I might expect the longest leaf longevities (this could definitely not be true...)]]> 2021-08-06 01:51:59 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670582437 Could be a nice study using Taraxacum and/or Plantago to examine within and between-plant variability in leaf defence traits during our next sampling bout https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670582641 2021-08-06 01:52:10 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670582641 Plant size and adaptation https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670584566 Large plants have generation times of 10-100s of years, so insects with generation times of weeks could adapt to individual plants and cause decrease in variability.]]> 2021-08-06 01:53:56 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670584566 Test if focal plant cover changes with latitude https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670589310 2021-08-06 01:58:17 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670589310 categorizing variability https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670590498 I wonder...is there a way to estimate whether the patterns of variability among plants are random or not? (more generally, do they fit a null model?). If there is a way, I think we could gain some insights into what is happening there, because the explanations (potential underlying processes) would be different (Ernesto Gianoli)]]> 2021-08-06 01:59:30 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670590498 Latitude and plant cover https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670591627 Check for relationship between latitude and focal plant cover. The last slide has relationships (focal plant cover-mean/variability) that are the opposite of those expected from the latitude-mean/variability relationships.

]]> 2021-08-06 02:00:40 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670591627 Was there a sampling bias in terms of whether people chose the low density versus standard method across the latitude gradient, and whether this may relate to the focal cover analysis https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670591836 2021-08-06 02:00:54 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670591836 look at correlates of latitude williamwetzel https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670595020 include some predictors that are correlates of latitude]]> 2021-08-06 02:04:18 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670595020 seasonality is more complex williamwetzel https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670595389 than latitude]]> 2021-08-06 02:04:42 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670595389 productivity williamwetzel https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670596364 also accounts for soil fertility]]> 2021-08-06 02:05:42 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670596364 https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670597947 Number of cloudy days is potentially worth considering as a predictor]]> 2021-08-06 02:07:05 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670597947 refine the lat gradient using williamwetzel https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670602655 other factors: soil fertility, elevation, precip, temp, seasonality, etc. bioclimatic variables, bioclim]]> 2021-08-06 02:11:37 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670602655 emphasize the pattern in the mean too williamwetzel https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670603570 this is one of the best demonstrations ]]> 2021-08-06 02:12:29 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670603570 Maybe a pipe dream but.. https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670610824 because you have this fabulous data set (thanks for the opportunity to be involved!) could also *one day* assess how these factors vary depending on the known drivers of insect decline - e.g. urbanisation (using light pollution metrics) and land clearing/use change
(Charlotte Mills)]]> 2021-08-06 02:19:15 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1670610824 Gini Coefficient v CV https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1671169555 I'm sure there are good reasons for using the Gini Coefficient over more common metrics of variation that could account for total or mean herbivory, such as the coefficient of variation. Unfortunately, I didn't think to ask about it last night! Was there a reason why CV wasn't used? No need to answer me directly, but I imagine a reviewer might want to know?

Thanks again for the great presentation last night. Super exciting results! (Andrew Merwin)]]> 2021-08-06 15:57:02 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1671169555 Gini cont. https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1671730430 (still thinking about the sweet results) if I'm remembering correctly, a normal distribution was used for the models? But if the Gini Index scales from 0 to 1, reviewers might wonder if a beta distribution might be more appropriate? I'm sure this gets really complicated with the phylogenetic models and what not. ]]> 2021-08-07 15:54:25 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1671730430 Correlation between leaf and plant scales https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1671731594 This was really cool to see -- at least at the biome level. It'd be neat to see the "raw" correlation between the leaf and plant gini indices. ]]> 2021-08-07 15:57:29 UTC https://padlet.com/williamwetzel/pub8m4ml1clwntxs/wish/1671731594