Rainfall as an Abiotic Factor at Race Rocks

Rainfall  at Race Rocks. Recorded by a Davis Instruments tipping bucket rain gauge. These graphs are made possible by the website victoriaweather.ca

Hourly Rainfall today at Race Rocks

 

 

Rainfall for the past week at Race Rocks

 

 

Rainfall for the past month

Rainfall for 2020 at Race Rocks

 

 

Rainfall graph for 2019

Rainfall graph for 2018

Rainfall graph for 2017

 

ARCHIVES
2016 Rainfall for 2016
NOTE MISSING DATA in 2016 due to equipment failure
2015: Monthly Totals are shown. ( Includes data and graphs at this site.) 2014: Monthly Totals are shown. ( Includes data and graphs at this site.) 2013: Monthly Totals are shown. ( Includes data and graphs at this site.) 2012: Monthly Totals are shown. ( Includes data and graphs at this site.) 2011: Monthly Totals are shown. ( Includes data and graphs at this site.) 2010: Monthly Totals are shown. ( Includes data and graphs at this site.) 2009: Monthly Totals are shown. ( Includes data and graphs at this site.) Note : Jan to July.. equip failure. 2008: Monthly Totals are shown. ( Includes data and graphs at this site.) equipment failure gives blank records for several days 2007: Monthly Totals are shown. ( Includes data and graphs at this site.) Equip failure February March and part of April of 2007 2006: Monthly Rain Totals (includes data and graphs for part of 2006:  

Extreme values since 2006

 

 

 

The Adaptations and Response of Organisms to the Abiotic factor of Rainfall

Canada geese are dependant on the availability of fresh water at Race Rocks. During the winter, the higher level rock pools are refreshed by rainfall. There is no other natural source of water on the island. By the time their eggs hatch in June, most of the pools have dried up, so they have to take their young off the island and over to the mainland. They may make it past the eagles….(Photo by PB)

Juvenile bald eagles in very wet weather.( Photo by Pam Birley)
The availability of water for vegetation on Race Rocks has major implications for the species of plants which can survive on the island. Not only do they have to survive dessication from salt spray, but abundant water in the winter months and almost a total lack of water from June to September. One of the best grasses to tolerate these conditions is Fescue. Here you can see it growing on the natural rock outcrops on the island. 


Go to this exercise on the Water Cycle , along with other biogeochemical cycles.

Other references:  Google Climate change and Rainfall patterns

Global warming already changing rainfall... 

Wetland Conservation – Threatened by Climate Change


Rainbow West of Great Race Rocks from the remote camera 5. Image by Garry Fletcher,

Recent Posts

Race Rocks ER #97 Warden’s Report May 2025

Ecological Reserve warden Garry Fletcher went out to Race Rocks in May  2025 with Laurag Verhegge and Isabelle Groc on the new Pearson College Boat with College staff Richard Taggart and Mike White and  electrician Jordan Cole, who was going out to test and repair corroded attachments on some of the Solar Panels

mmAt the mouth of Pedder Bay near the small island on the north side we came across a sea otter foraging for crabs. This was a great opportunity for Isabelle to get some good photos for her project she is doing on Sea Otters.

On our arrival at the Ecological Reserve,  we were greeted at the jetty by the Ecoguardian hired by Lester Pearson College, Christine Chourmourzis. Christine will be there through  the next few weeks in July . I might add that I have appreciated her excellent coverage of events at Race Rocks in this log for this website, and she has been an effective warden in looking after the operations on the island.

 

Isabelle Groc and Pearson College Marine Biology teacher Laura Verhegge

7One female elephant summer has stayed on the island for the summer, normally they have all left by now and return later in the year. she is moulting now.   one photogenic California Sea lion also greeted us on arrival.

Chriistine  has also discovered several new plant species on the island . showed these to me and i have posted them on iNaturalist where they can be seen at the following link: Eventually they will get their own page in the Biodiversity section here.

I was not able to find any Romanzoffia or mist maidens in one of their usual spots but the long ago introduced Turkish gladiolus has spread to a few new locations East of the Ecoguardians residence.

 

The Glaucous winged gulls were in full nesting mode and one agressive adult even knocked my hat off while I was on a sidewalk.

One nest contained eggs of different colours .. iI am not sure if that is normal.

Some records are not being recorded on the Davis weather instrument and after a full cleaning some sensors are still not recording so we are looking into that.

 

 

 

 

 

 

 

 

we will be asking BC Parks for a replacement of the ER sign , I has withstood the harsh environment for a good length of time now but is showing wear and missing one section.

 

 

 

Christine did the seawater measurements while we were there, A probe is lowered of the end of the jetty to a metre depth every day near high tide These records are submitted monthly to the Institute of Ocean Sciences at Pat Bay. This link provides the seawater récords for past months .

https://racerocks,ca/tag/seawater-data/

 

One of the ecotourism boats passed by while we were there . In a past agreement made with the ecotourism companies and BC Parks, boats are required to stay in the centre of the channel in order to comply with regulations for marine mammal viewing .

 

I noticed that the concrete and wood refuse left in piles from previous construction and repair work that was supposed to be taken off the island by a BC Parks vessel are still there after many reminders by Pearson College staff.

iPast warden’s reports are at this link

https://racerocks.ca/category/er-warden-report/

 

 

 

 

 

 

 

 

 

 

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