Life Cycle


Berberis nervosa, and its cousin, Mahonia nervosa are species of Oregon Grape. They grow slowly to about two feet in the Douglas-fir forests of the Pacific Northwest.

Pollinators love its yellow flowers, which typically emerge in late March/early April, flowering through April and May depending on the amount of shade.

The resulting berries are a dusty-blue, and are what earn this plant the name “grape”. Don’t be fooled! These berries are edible, but quite tart - making them better suited for jams than wine.

Phenology – biological events that depend on climate


We collected data from March to May 2021: spanning growth of inflorescence (a cluster of flowers), emergence of racemes (flower stalks), blossoming, and fruit sets.

This data is multimodal, and comprised of:

Weather


The growth of the Oregon Grape is influenced by environmental variables: shade, rain, air quality, etc. We’re using video footage and environment measures to learn about how these factors interact, and what this means for the plants and visiting pollinators!

Air Quality


You can read more on different ways that we measure the air in our Air Quality Story

Flower-insect timed (FIT) counts

FIT Counts for April 20th-21st 2021
Bumble bees Honey bees Other bees Hover flies Bee flies Other Total
April 20 2021
09:00 1 0 0 0 0 0 1
11:00 4 0 0 0 0 0 4
13:00 5 0 0 0 1 0 6
15:40 4 0 0 1 1 0 6
Day Total 17
April 21 2021
09:00 1 0 0 0 0 0 1
11:00 2 0 0 0 0 0 2
13:00 3 0 2 0 0 3 8
15:40 5 0 2 0 0 0 7
Day Total 18

FIT counts provide an estimate of the proportion of pollinators seen in time lapse pictures

Details

Weather conditions

Total number of pollinators over 40min of observation

More pollinators in afternoon than morning

Pollenator counts from video footage

Counts from Video Footage April 22nd 2021
Time Number of Pollinators
10:05 - 12:00 4
12:00 - 16:00 12
16:00 - 20:20 18
Total 34

Video footage was collected from April 21st - May 4th. Our cameras were det to collect 4 min of footage every 5 min. Video counts provide an estimate of the proportion of pollinators seen in time lapse pictures.

Details

Weather conditions

Total number of pollinators over 8 hrs of observation

More pollinators in afternoon than morning

Pollinator visits during peak blooming

FIT Counts and Video Footage counts give similar results
Flower-Insect Timed Counts Video Footage Counts
Dates April 20th-21st April 22nd
Number of hours observed 14 10
Number of inflorescences observed 48 7
Average number of pollinator visits per hour 26 4.25
Number of pollinators per hour per inflorence 0.54 0.61

Having good estimates is important for when we want to make use of time-lapse images. Collection of these time-lapse images started in March, and is ongoing.

With these images, we’re collecting training data for a neural network that in the future we can use to automatically determine number of pollinators visiting the Oregon Grape.

Thanks to the Young Entomologists at Biodiversity Galiano, who are helping us identify pollinator species, we will be able to train the neural network to detect and count the visitation habits of different pollinator species to the Oregon Grape during bloooming