Re: [maxent] Digest for maxent@googlegroups.com - 3 updates in 1 topic

[Jillian Schat]

Hi Gourev, do you have an error message from R that you can share?

I haven't used the projected dataset from worldclim, but I think you can integrate them into your typical maxent analysis almost as is. Since the bioclimatic variables seem to download as one file, it's likely that each bioclim variable is stored as a layer in the tif file. I think Gebreyohannes was saying that you'll need to separate these layers in R, so that R can treat each bioclim variable as a separate entity. This page might help: https://gis.stackexchange.com/questions/424616/how-can-i-select-which-layers-i-want-to-keep-in-a-new-spatraster

If you load each of these tifs into R, and run something like this:

environmental_variable <- terra::rast("your_file.tif")

environmental_variable

it should tell you if the tif file has multiple layers. 

Best,

Jillian

On Sun, Jul 20, 2025 at 11:14 AM <max...@googlegroups.com> wrote:

max...@googlegroups.com

Google Groups

Topic digest
View all topics

• Future climatic variables - 3 Updates

Future climatic variables

Gourav Devtalla <devtall...@gmail.com>: Jul 19 10:42PM -0700 I need help in predicting distribution of a species with future climatic scenarios. I have downloaded ssp1 and ssp5 file for the year 2021-2040 and 2041-2060 but as I am opening the file it has several bands. I don't know what to do.

Gebreyohannes Zenebe <zege...@gmail.com>: Jul 20 05:15PM +0300 Hello,   If you downloaded daily or monthly data, it comes with layers, not bands. I'm not sure which data provider you used, but I suggest downloading the 19 bioclimatic variables directly. Alternatively, you can aggregate your daily data to a monthly basis and then generate the 19 Bioclim variables using the biovars function from the dismo package in R.   -- With kind regards,   Gebreyohannes Zenebe MSc. in Geo-Information and Earth Observation Science for Natural Resources Management Mobile: +251930527887 +251993155395 email: gebreyohan...@mu.edu.et; g.ze...@seefconsult.com https://orcid.org/0000-0002-6100-4908   On Sun, Jul 20, 2025, 8:42 AM Gourav Devtalla <devtall...@gmail.com> wrote:

Gourav Devtalla <devtall...@gmail.com>: Jul 20 10:53PM +0530 I downloaded the data from worldclim database. I've already done the niche distribution for present scenario and I'm aware of that process. The problem I'm having is with the future climatic variables that I've downloaded from world clim for the year 2021-2040 and 2041-60. This data had four variables namely bio , tn tx and prec now i want to know how to process this data on maxent and before that i want to learn how to process this data on arcmap or qgis. Hope i was specific about my query.   On Sun, 20 Jul, 2025, 19:45 Gebreyohannes Zenebe, <zege...@gmail.com> wrote:

Back to top

You received this digest because you're subscribed to updates for this group. You can change your settings on the group membership page. To unsubscribe from this group and stop receiving emails from it send an email to maxent+un...@googlegroups.com.

[Jillian Schat]

Sorry Gourav, just realized I misspelled your name