Pollination farm yield seasons

Software Support
1

Dear users,
I need to use the pollination model to get the potential pollination service on two different crops, flowering on two different seasons.
I am getting zero values on the pdep_y_w and y_wild outputs when I set to zero the fr_[SEASON], and I don’t understand why.

To illustrate the problem I will use the dataset provided with the software, and show the different tests I made.

I only changed the farm.shp file. This is the output :
image

If I want the crops to flower only during one season, I set the other fr_[SEASON] to zero.
image
The almond farm has pollinators (p_abund > 0) but y_wild is 0.

Then I tried to set both crops fr_summer to 1, keeping the almond season set to spring
image
In the almond farm the p_abund is 0 but yet the y_wild is positive.

If I set both crops fr_spring to 1 and fr_summer to 0

image
image1324×100 5.66 KB

It seems only the fr_summer is taken into account to compute y_wild ?
Is it a normal behavior ? Is there something that I am missing ?
I am using the version 3.15.1.

Best regards

2

Hi,
I tried investigating the possible source of the problem.
Using the dataset provided, and :

  • setting to zero the fr_summer for almonds (which is supposed to be pollinated during spring) and to zero the fr_spring for blueberries.
  • adding a season named “z”, for which floral resources of both almonds and blueberries are set to zero.

I get a positive p_abund on farm_results but a nul pdep_y_w and y_wild for both crops.
Looking at the intermediate outputs :

  • half_saturation_[season] seems correct for both spring and summer
  • total_pollinator_abundance_[season] also seems correct for both spring and summer
  • farm_pollinator_[season] is zero for both spring and summer and both crops

So, I suspect there might be a problem with the computation of farm pollinator abundance (FP_season).

Is there someone in the software support team that could look into this, or tell me if I am missing something ?

Thank you for your support.

3

Hi @Gaelle , thanks for describing the issue in detail. It does sound like it could be a bug. I will try to reproduce the problem.

4

Hi Dave,
Thank you for looking into this, I look forward to hearing from you.
Best regards

5

Hi @Gaelle , I think you are correct that this is a bug where only one of the seasons was contributing to the on-farm pollinator abundances. Pollination seasonal on-farm abundance uses the wrong season · Issue #2038 · natcap/invest · GitHub

I believe I have fixed this issue in a development build, if you would like to try it out.
[Mac Installer]
[Windows Installer]

6

Hi @dave,
I ran the model after installing the version you sent, but I get the same results as before.

7

My apologies, @Gaelle . I hastily sent the wrong version. We’re having some issues with our build process, so I don’t have an updated version to share with you yet.

8

Thanks for your patience, @Gaelle , feel free to try this new version:

Windows Installer
Mac Installer

9

Hi @dave, thank you for solving the problem, it seems to work fine with the version you just sent.

10

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.