Members' Wetland Webinar Series

ASWM Member Webinar

The Association of State Wetland Managers (ASWM) holds a webinar each month for its members. ASWM Member webinars cover a variety of topics encompassing wetland science, policy, program implementation, and legal issues. These webinars, including recordings for past webinars are available to ASWM members. If you are not a member, you are invited to join ASWM. For information about membership, click here.

For more information about this  webinar series, please contact Laura Burchill at or (207) 892-3399.

Future Members' Webinar Schedule

ASWM Members webinars are generally held the fourth Wednesday of the month unless the date and time needs to be adjusted for when the presenter(s) is available.

If you haven’t used Go To Webinar before or you just need a refresher, please view our guide prior to the webinar here.

If you would like to participate in the webinar but believe there is not enough time to join and register, please contact Laura at or call 207-892-3399.


Mapping tidal wetlands and their losses on the U.S. West Coast: New methods, new insights

January 31, 2018 - 3:00 p.m.-4:30 p.m. EST

PRESENTER

Laura Brophy, Director, Estuary Technical Group, Institute for Applied Ecology, Corvallis, Oregon, USA

ABSTRACT

Co-investigators: Correigh Greene1, Van Hare2, Brett Holycross2, Andy Lanier3, Hiroo Imaki1, Tanya Haddad3, Randy Dana3, Walter Heady4, Kevin O'Connor5

How can we be more effective in our work to conserve and restore estuarine wetlands on the U.S. West Coast, both under current conditions and projected future sea level rise? The first step is to make sure we have accurately mapped the historical and current extent of estuarine wetlands. Existing comprehensive tidal wetland mapping (the National Wetland Inventory) has limitations for these purposes: it does not explicitly map former tidal wetlands (which represent restoration opportunities), nor does it use water level models or high-resolution elevation data (e.g. LIDAR) to accurately identify areas within tide range. Therefore, our team, coordinated through the Pacific Marine and Estuarine Fish Habitat Partnership (PMEP), recently generated new maps of current and historical tidal wetlands for the entire contiguous U.S. West Coast (Washington, Oregon, and California). The new maps use LIDAR digital elevation models (DEMs) and NOAA water level models to establish the maximum extent of tidal wetlands, and they represent a major step forward in accuracy and utility for restoration planning and analysis of wetland loss and conversion. The maps include former tidal wetlands within current tide range (such as diked lands), which represent restoration opportunities. Using this new mapping, total current and historical tidal wetland area for the West Coast is approximately 360,000 to 370,000 hectares. Building from this new base, our team developed an indirect method for mapping tidal wetland losses, and created maps of these losses for 55 estuaries on the West Coast; these 55 estuaries represent about 98% of historical West Coast tidal wetland area. Based on this assessment, about 85% of tidal wetlands have been lost from West Coast estuaries; losses were highest for major river delta systems. The new maps will help interested groups develop improved action plans for estuarine wetland habitat restoration and conservation, and will also provide a base for understanding and predicting future changes with projected sea level rise.

Co-investigator affiliations:
1 NOAA Fisheries, Seattle, WA
2 Pacific States Marine Fisheries Commission, Portland, OR
3 Oregon Coastal Management Program, Dept. of Land Conservation and Development, Salem, OR
4 The Nature Conservancy
5 Moss Landing Marine Labs

BIO

Laura Brophy is the Director of the Estuary Technical Group at the Institute for Applied Ecology in Corvallis, Oregon. She provides leadership in science-based decision support for estuary restoration and conservation priorities in the Pacific Northwest. Her current work focuses on West Coast estuarine habitat mapping and prioritization; analysis of climate change threats and strategic planning for sustainability of Pacific Northwest wetland ecosystems; and effectiveness monitoring at Oregon's largest tidal wetland restoration projects. 


Members' Wetland Webinar Series

There is no charge for current members. To register, click here.

ASWM Members' Wetland Webinar SeriesIf you would like to register for this and future ASWM Member Webinars and are not a current member, please click on Join ASWM”. After receiving your membership payment you will be sent a confirmation email and you can return to this page to register.

If you would like to participate in the webinar but believe there is not enough time to join and register, please contact Laura at or call 207-892-3399.



To view Past Members' Wetland Webinars:

Members You must be logged in.

Nonmembers To view recent Members' Webinars, please join ASWM.

To view 2012 webinars (publicly available), click here





To view Past Members' Wetland Webinars:

Members You must be logged in.

Nonmembers To view recent Members' Webinars, please join ASWM.

To view 2012 webinars (publicly available), click here.