Landscapes - People - Global change

Tag: salt marsh restoration (Page 1 of 2)

New paper on the the limits of ecosystem service assumptions

I’m popping my head up at the end of three weeks being locked out by Dalhousie to share news of a new ResNet paper published this morning in Ecosystems and People, Proximity, benefit transfer and trade-offs: the limits of ecosystem service assumptions in an anthropogenic rural coastal setting. I led this one but had a strong support team, including postdocs Lara Cornejo and Brooke McWherter, and Masters students Sam Howard and Alex Legault. I’m so pleased with the big picture insight we were able to glean from our relatively low-effort survey question about ecosystem service benefits from dykes, dykelands and tidal wetlands around the Bay of Fundy. Very few benefits were associated with proximity, especially for dykelands and tidal wetlands. Very different ‘hotspot’ patterns showed the limits of benefit transfer practices even within relatively close and homogenous places. Where hotspots don’t exist, for instance for tidal wetlands, this does not mean there is not benefit flow: benefits may simply be more distributed. This suggests proximity is a poor predictor of stakeholdership. And finally, assumptions of trade-offs in converting between landforms may not play out as expected: we saw many people getting the same benefits from dykes, dykelands and tidal wetlands. In the face of managed dyke realignment that converts some former dykeland back to tidal wetland, it is useful to learn that the very different landforms seem to many to belong together. With some exceptions (e.g., food, safety), this means that trade-offs may not be as significant as might otherwise be assumed, especially in places where multifunctionality is desired and the dyke remains contiguous and accessible for transportation.

Small multiple maps of hotspots and coldspots for various landforms and benefits.

Small multiple maps of hotspots and coldspots for various landforms and benefits (Figure 2 in Sherren et al., 2025, Ecosystems and People).

Atlantic Voice documentary

I had forgotten about my interview with local journalist Moira Donovan until an email from a colleague alerted me that the documentary she produced for CBC’s Atlantic Voice aired this morning. The short (26 minute) documentary is called Breaching Tradition, and does a nice job of telling the story of the challenges facing Bay of Fundy dykelands. Collaborators Danika van Proosdij (SMU) and Tony Bowron (CBWES) are featured as well, and several residents of areas like Nappan and Advocate Harbour whose communities and livelihoods are threatened. Donovan also put together a CBC news article by the same name: Breaching tradition: Salt marshes replacing Nova Scotia’s dikes. This is the setting and challenging management context for the case study I am co-leading in a new 5-year national NSERC project called ResNet.

Institutional entrepreneurship paper

Institutional entrepreneurship in Nova Scotia dyke realignment and salt marsh restoration, illustrated.

Institutional entrepreneurship in Nova Scotia dyke realignment and salt marsh restoration, illustrated.

Congratulations to Tuihedur for his first paper from the postdoctoral fellowship that sees him working across Dalhousie and Saint Mary’s, out today open access in Sustainability. He used his knowledge of the institutional literature to ground our existing case study of the North Onslow dyke realignment and salt marsh restoration project–first written as the Canadian chapter in an OECD report Responding to Rising Seas–and analyzed it through the lens of institutional entrepreneurship. This involved synthesizing the characteristics of such entrepreneurs from the literature, mapping the existing jurisdictional responsibilities around coastal management in Nova Scotia, and demonstrating how those responsibilities were leveraged in the flood-prone Truro area. Even in the absence of coastal protection legislation, three government departments were able to collaborate to create a new ‘way of doing things’ that served their own objectives with coastal adaptation and flood mitigation as a happy by-product.

OECD Rising Seas report release

OECD ad for new Rising Seas report

OECD ad for new Rising Seas report

Last summer I led the writing of a case study on an innovative coastal adaptation project underway in Truro, Nova Scotia, a place plagued by flooding for decades. A confluence of provincial department interests enabled collaboration on a dyke realignment and salt marsh restoration project in the absence of overarching climate adaptation or coastal protection policy. That case study was Canada’s contribution to an OECD report (featuring case studies also from New Zealand, Germany and the United Kingdom). That report , “Responding to Rising Seas: OECD Country Approaches to Tackling Coastal Risk“, was released this week with a webinar from Paris (slides here). I was proud that OECD’s Lisa Danielson, who also joined us in Halifax for our workshop on the case study last November, highlighted the Truro case during the session. The report features some excellent synthesis of learnings from the four case studies, as well as some novel analysis on cost-benefit ratios for adaptation action for the world’s coasts: sadly rural areas aren’t going to pay for themselves this way, so novel finance options will be needed.

OECD's Lisa Danielson speaks to the Truro case study at the Rising Seas webinar, March 6, 2019

OECD’s Lisa Danielson speaks to the Truro case study at the Rising Seas webinar, March 6, 2019

Talk for World Wetlands Day

Thanks to the folks at Ducks Unlimited Canada (DUC) and the Dalhousie Biology graduate students for the invite to talk about the social aspects of salt marsh restoration yesterday at Dalhousie’s LSC. DUC’s Lee Millett led the way with a scientific backgrounder, and then I summarized a few studies of mine that help us understand the public (and thus) responses to salt marsh restoration. Nick Hill concluded with some preliminary analyses of restoration projects underway with DUC in the Jijuktu’kwejk (Cornwallis) river. A fun way to spend a Friday afternoon.

Fernhill Institute's Nick Hill excited about spartina

Fernhill Institute’s Nick Hill excited about spartina

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