Aquatic Plant Survey 2023

**This Aquatic Plant Survey is also posted on the BC Stewardship 2023 Page**

Aquatic Plant Survey

Aboard Joanne Delage & Ron Burton’s floating barge, Kitty Lloyd, Winona Pugh & Lori James Derry collected samples of lake plants.

Prospect Lake Aquatic Plant Survey
Sampling Date: September 23, 2023
Volunteers: Ron Delange, Joanne Delange, Lori James Derry, Winona Pugh
Due to extreme low water levels there is a significant difference in depth sample sites
Plant Sampling Sites:
Site # 1: North 4830’25” X West 12326’29”
Site # 2: North 4830’28” X West 12326’41”
Site # 3: North 4830’47” X West 12326’48”
Site # 4: North 4830’47 X West 12326’27”
Site # 5: North 4831’ 5” X West 12326’25”
Site # 6: North 4830’47” X West 12326’29”
Site # 7: North 4830’47” X West 12326’54
Site # 8: North 4830’47” X west 123 26’54”

We have 8 sites we stop at, and collect plants from 3 depths at each site: 2, 4 & 6 meters. Where you see no photos after the site/ depth location, it means we couldn’t get to that shallow of depth because of the density of plants.

Using plant density rating charts from the BCLSS:

Density rating chart – rake (modified from Wandell and Wolfson, 2000)
Rake recovery of aquatic plant Density rating

Dense (D)
Moderate (M)
Sparse (S)

Sample Location:
Site 1 Southern Bay

@ 2 meters

@ 4 meters

 Ceratophyllum demersum (coontail) – dense
 Myriophyllum sibericum (northern water milfoil) native Myrophyllum spicatum (eurasian water milfoil) invasive – dense
 Elodea canadensis (Canada waterweed) – sparse

@ 6 meters – lake level too low

Site 2: Blethman Creek

@ 2 meters

• weeds too thick to access site

@ 4 meters

• Myriophyllum sibericum (northern water milfoil) native Myrophyllum spicatum (eurasian water milfoil) invasive dense
• Ceratophyllum demersum (coontail) dense
• Elodea canadensis (Canada waterweed) sparse

@ 6 meters

• Ceratophyllum demersum (coontail) – dense
• Myriophyllum sibericum (northern water milfoil) native Myrophyllum spicatum (eurasian water milfoil) invasive – moderate

Site 3 Estelline Bay

@ 2 meters

 weeds too thick to access site

@ 4 meters

 Myriophyllum sibericum (northern water milfoil) native Myrophyllum spicatum (eurasian water milfoil) invasive – dense
 Ceratophyllum demersum (coontail) – dense
 Elodea canadensis (Canada waterweed)

@ 6 meters

 Myriophyllum sibericum (northern water milfoil) native Myrophyllum spicatum (eurasian water milfoil) invasive – dense
 Ceratophyllum demersum (coontail) – dense

Site 4 Northwest Bay

@ 2 meters: weeds too thick to access site

@ 4 meters

 Elodea canadensis (Canada waterweed) – moderate
 Vallisneria americana (eel grass) – sparse
 Myriophyllum sibericum (northern water milfoil) native Myrophyllum spicatum (eurasian water milfoil) invasive – dense
 Ceratophyllum demersum (coontail) – dense

@ 6 meters

 Ceratophyllum demersum (coontail) – dense
 Myriophyllum sibericum (northern water milfoil) native Myrophyllum spicatum (eurasian water milfoil) invasive – dense
 Myriophyllum sibericum (northern water milfoil) native Myrophyllum spicatum (eurasian water milfoil) invasive – dense
 Elodea canadensis (Canada waterweed) – moderate
 Potamogeton pectinatus (Sago pondweed) now Stuckinia pectinata

Site 5: Killarney Creek

@ 2 meters

 weeds too thick too access site

@ 4 meters

 Ceratophyllum demersum (coontail) – dense
 Myriophyllum sibericum (northern water milfoil) native Myrophyllum spicatum (eurasian water milfoil) invasive – dense
 Elodea canadensis (Canada waterweed) – moderate
 Vallisneria americana (eel grass) – sparse
 Oedogonium – sparse

@ 6 meters –

 Ceratophyllum demersum (coontail)
 Myriophyllum sibericum (northern water milfoil) native Myrophyllum spicatum (eurasian water milfoil) invasive – moderate

Site 6: Echo Bay
@ 2 meters

• too much weed to access site

@ 4 meters

 Ceratophyllum demersum (coontail)
 Myriophyllum sibericum (northern water milfoil) native /Myriophyllum spicatum (eurasian water milfoil) invasive
 Nitella (algae) / Oedogonium – sparse

@ 6 meters

 Ceratophyllum demersum (coontail) – dense
 Potamogeton robbinsii (fern pondweed) – sparse

Site 7: shallow shelf

@ 2 meters

 Potamogeton robbinsii (fern pondweed) – sparse
 Vallisneria americana (eel grass) – sparse
 Myriophyllum sibericum (northern water milfoil) native /Myriophyllum spicatum (eurasian water milfoil) invasive – dense
 Elodea canadensis (Canada waterweed) – moderate
 Ceratophyllum demersum (coontail) – moderate

@ 4 meters

 Vallisneria americana (eel grass) – sparse
 Myriophyllum sibericum (northern water milfoil) native /Myriophyllum spicatum (eurasian water milfoil) invasive – dense
 Potamogeton amplifolius (big leaf pondweed) – sparse
 Elodea canadensis (Canada waterweed) – moderate
 Ceratophyllum demersum (coontail) – moderate

@ 6 meters

 Potamogeton robbinsii (fern pondweed) – sparse
 Ceratophyllum demersum (coontail)
 Myriophyllum sibericum (northern water milfoil) native /Myriophyllum spicatum (eurasian water milfoil) invasive

Site 8: shoreline extremely sloping to deepest point of the lake at 14 meters 2021 Samples taken from shoreline

@ 2 meters

no samples

@ 4 meters

no samples

@ 6 meters

 Potamogeton robbinsii (fern pondweed) – sparse
 Ceratophyllum demersum (coontail) – sparse
 Elodea canadensis (Canada waterweed) – sparse
 Vallisneria americana (eel grass) – sparse