Rates of surface elevation change and accretion in coastal NPS marshes in the northeast U.S.: Trend Analyses for Northeast Coastal and Barrier Network (NCBN), Northeast Temperate Network (NETN) and National Capital Region Network (NCRN) Parks
Tredennick, AT, Tabak M, Lombardi J, Starcevich LA. 2021. Rates of surface elevation change and accretion in coastal NPS marshes in the northeast U.S.: Trend Analyses for Northeast Coastal and Barrier Network (NCBN), Northeast Temperate Network (NETN) and National Capital Region Network (NCRN) Parks. Western EcoSystems Technology, Inc.. Cheyenne, WY
Wetland elevation change was selected as a Vital Sign for the Northeast Coastal and Barrier Network (NCBN), the National Capital Region Network (NCRN), and the Northeast Temperate Network (NETN) so the resilience of wetland communities may be monitored in response to potential effects of climate change. Data on marsh elevation and vertical accretion have been collected at nine parks in NCBN, NCRN, and NETN beginning as early as 1998. Each park contains marshes where sediment elevation change is monitored with surface elevation tables (SETs) and sediment accretion is measured with marker horizons obtained from applied artificial soil layers. The goals of this project were to: • Determine trends for each Sampling Station, Site and Park using a GLMM or GAMM based on elevation and accretion data over the full length of the dataset. • Compare elevation and accretion trends to each other for each Sampling Station and Site, as well as to local rates of sea level rise (SLR), • Provide guidance based for when to consider analyzing the SET dataset over shorter time periods, as well as compare accretion and elevation linear trends based on fall and spring sampling dates to determine if sampling frequency can be limited to once per year.
- Type
- Unpublished Report
- Authors
- Tredennick,, Andrew; Tabak, Mikey; Lombardi, John; Starcevich, Leigh
- Date of Issue
- 2021-11-08
- Publisher
- Western EcoSystems Technology, Inc.
- Units
- NCBN , NCRN , NETN
- Keywords
- accretion, analysis, elevation, marker horizon, monitoring, Northeast, salt marsh, sediment, sediment elevation table, SET, trend