Phosphorus Dynamics and Availability in the Nearshore of Eastern Lake Erie: Insights From Oxygen Isotope Ratios of Phosphate
Blooms of filamentous benthic algae that plagued Lake Erie in the 1950s through 1970s were largely reduced through reductions of phosphorus (P) loading from point sources. Since the mid-1990s, these blooms have returned despite a period of relatively stable external P inputs. While increased loadings of dissolved P have been causally linked to cyanobacterial blooms in some parts of the lake, the impacts of ecosystem changes such as the effect of invasive species on nutrient cycling and availability have not been fully elucidated, leading to uncertainty as to the effectiveness of additional non-point P management actions. Here we use the oxygen isotope ratios (δ18OP) of phosphate in concert with measures of water quality along the northern shore of the east basin of Lake Erie to identify sources and pathways of P cycling and infer potential importance in relation to annual blooms of Cladophora that foul the shorelines of eastern Lake Erie. δ18OP data indicate that potential external source signatures are rapidly overprinted by biological cycling of P by the plankton community and that much of the available phosphate in the nearshore waters is derived from hydrolysis of dissolved organic P compounds. Near the dreissenid-colonized lake bed, δ18OP was persistently and significantly enriched in 18O relative to δ18OP measured in surface waters and was similar to δ18OP of phosphate excreted by dreissenid mussels in incubations. These results implicate dreissenid mussels as key agents in nearshore P cycling and highlight the importance of considering ecosystem changes in the development of nutrient management strategies designed to ameliorate symptoms of eutrophication.
For more information and data please visit: https://open.canada.ca/data/en/dataset/4497ebe5-f45e-4b13-9e98-e9edd016fc66
Basic view
Metadata Record Information
- File Identifier
- 18ee3bb5-f78a-4999-bf4b-4a5aa46c635b XML
- Date Stamp
- 2022-06-29T20:26:52
- Metadata language
-
eng; CAN
- Character set
- UTF8
- Hierarchy Level
- Dataset
https://www.canada.ca/en/environment-climate-change.html
Data identification
- Date (Creation)
- 2013-04-02
- Date (Publication)
- 2018-11-30
- Status
- Completed
- Metadata language
-
eng; CAN
- Character set
- UTF8
- Topic category
-
- Inland waters
- Maintenance and Update Frequency
- As needed
- Spatial representation type
- Text, table
Keywords
- Theme
-
-
nutrients
-
Observation/Measurement
-
Great Lakes Nutrient Intiative (GLNI)
-
oxygen iostopes
-
phosphorus
-
- Place
-
-
Lake Erie
-
-
Government of Canada Core Subject Thesaurus
-
-
Water quality
-
-
ECCC Information Category EN
-
-
Water - Quality
-
-
Business Functions
-
-
Oversee and Manage Site Conditions
-
Designate and Manage Areas of Interest or Concern
-
-
Geography
-
-
Water - Drainage regions - Great Lakes
-
Ontario (ON)
-
-
external.theme.EC_Branch
-
-
Science and Technology Branch
-
-
external.theme.EC_Directorate
-
-
Water Science and Technology
-
-
external.theme.EC_Program_PAA
-
-
1.3.4. Great Lakes
-
-
external.theme.GC_Security_Level
-
-
Unclassified
-
- Use Limitation
-
Open Government Licence - Canada ( http://open.canada.ca/en/open-government-licence-canada )
- Access Constraints
- License
- Use Constraints
- License
- Begin Date
- 2013-04-02
- End Date
- 2015-11-18
Extent
Ref. system Reference Systems
- Reference system identifier
- http://www.epsg-registry.org / EPSG:3978 /
Distribution
Distribution Formats
- Distribution format
-
-
CSV
(
unkown
)
-
CSV
(
unkown
)
https://www.canada.ca/en/environment-climate-change.html