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Papers by Danika Van Proosdij

AGU Fall Meeting Abstracts, Dec 1, 2012

Frontiers in Ecology and Evolution

IntroductionTidal wetland restoration in the Bay of Fundy involves restoring tidal hydrology to s... more IntroductionTidal wetland restoration in the Bay of Fundy involves restoring tidal hydrology to sites with tidal restrictions. Most have focused on salt marsh sites close to the mouth of estuaries, but there are also many tidally restricted wetlands closer to the freshwater end of tidal rivers. Recovery of salt marsh vegetation has been rapid in past projects, but little is known about sediment and vegetation dynamics post restoration in tidal brackish or freshwater environments.MethodsWe implemented tidal wetland restoration projects on two tidal rivers near the inland limit of saltwater. Hydrological restoration involved breaching (St. Croix) or realigning agricultural dykes (Belcher Street). We monitored hydrology, sediment accretion and vegetation at replicated plots on restoration sites and nearby reference tidal marshes; and conducted habitat mapping and elevation surveys using drones.ResultsAfter re-establishing tidal flow, sediment accretion was very rapid, leading to a deep...

EGU General Assembly Conference Abstracts, Apr 1, 2019

Sustainability, 2019

Sea-levels have been rising at a faster rate than expected. Because of the maladaptive outcomes o... more Sea-levels have been rising at a faster rate than expected. Because of the maladaptive outcomes of engineering-based hard coastal protection infrastructure, policy makers are looking for alternative adaptation approaches to buffer against coastal flooding—commonly known as nature-based coastal adaptation (NbCA). However, how to implement NbCA under an institutional structure demonstrating ‘inertia’ to alternative adaptation approaches is a question that seeks scientific attention. Building on a case study derived from a highly climate-vulnerable Canadian province, this study shows how the entrepreneurial use of scientific information and institutional opportunities helped institutional actors overcome the inertia. Drawing on secondary document analysis and primary qualitative data, this study offers five key lessons to institutional actors aiming at implementing NbCA: (i) develop knowledge networks to help avoid uncertainty; (ii) identify and utilize opportunities within existing in...

Salt marshes are a type of coastal wetland that are affected by dynamic coastal processes. Ice bl... more Salt marshes are a type of coastal wetland that are affected by dynamic coastal processes. Ice blocks and wrack (mats of plant debris) regularly float onto northern marshes and become stranded, affecting vegetation and soil accretion. There is little research regarding the capacity of ice and wrack to transport viable plant propagules onto marshes where they can colonize, which may be particularly important at barren new salt marsh restoration sites. Contributions of sediment by ice may also be important at restoration sites to raise the marsh platform to elevations appropriate for plant colonization. We collected ice (n = 27) and wrack (n = 18) samples at marshes in the Bay of Fundy, ran germination trials with the contents, and measured the quantity of sediment in the ice. We found viable propagules from halophytic and non-halophytic species in wrack, and viable propagules of Sporobolus pumilus in ice. Additionally, we found sediment densities between 0.01 and 4.75 g·cm−3 in ice b...

Danika van Proosdij1, Tim Milligan2, Gary Bugden2, and Karl Butler3 1. Department of Geography, S... more Danika van Proosdij1, Tim Milligan2, Gary Bugden2, and Karl Butler3 1. Department of Geography, Saint Mary’s University, 923 Robie St. Halifax, NS, B3H 3C3 Canada ¶ 2. Fisheries and Oceans Canada, Habitat Ecology Section, Bedford Institute of Oceanography, P.O. Box 1006, Halifax, NS, B2Y 4A2 Canada ¶ 3. Department of Geology, University of New Brunswick, P.O. Box 4400, Fredericton, NB, E3B 5A3 Canada

<p>This presentation will examine factors influencing the restoration traje... more <p>This presentation will examine factors influencing the restoration trajectory of tidal wetland restoration projects in Nova Scotia, Canada, and considerations for long term resilience.  Rates of relative sea level rise in Nova Scotia are projected up to 1.5 m by 2100 (RCP 8.5) and restoration of tidal wetlands are important for climate change adaptation and mitigation.  Over the last 15 years, CBWES, Saint Mary’s University and the Province have restored close to 400 ha of tidal wetland habitat by enlarging culverts or realigning dyke infrastructure.  Comprehensive pre and 5-year post restoration monitoring and insights from the <em>Making Room for Wetlands </em>project reveal marked differences in the rate of vegetation recolonization, surface elevation change and overall restoration trajectory between Atlantic and Fundy marshes.   Differences are also recorded between sites in the Lower Bay (6 m tidal range) and Upper Bay of Fundy (16 m tidal range).  This presentation will focus on the influence of sediment supply, tidal range (inundation frequency and duration), restoration design and seasonal timing of re-introduction of tidal flow on the rate of vegetation recolonization and implications for long term resilience.  </p>

EGU General Assembly Conference Abstracts, Apr 1, 2019

This repository contains Supplementary Data accompanying an initial submission of the article &qu... more This repository contains Supplementary Data accompanying an initial submission of the article "Automated Rapid Artefact Surface Area Measurement from Imagery with Computer Vision" submitted to the Journal of Lithic Studies.

AGU Fall Meeting Abstracts, Dec 1, 2012

Frontiers in Ecology and Evolution

IntroductionTidal wetland restoration in the Bay of Fundy involves restoring tidal hydrology to s... more IntroductionTidal wetland restoration in the Bay of Fundy involves restoring tidal hydrology to sites with tidal restrictions. Most have focused on salt marsh sites close to the mouth of estuaries, but there are also many tidally restricted wetlands closer to the freshwater end of tidal rivers. Recovery of salt marsh vegetation has been rapid in past projects, but little is known about sediment and vegetation dynamics post restoration in tidal brackish or freshwater environments.MethodsWe implemented tidal wetland restoration projects on two tidal rivers near the inland limit of saltwater. Hydrological restoration involved breaching (St. Croix) or realigning agricultural dykes (Belcher Street). We monitored hydrology, sediment accretion and vegetation at replicated plots on restoration sites and nearby reference tidal marshes; and conducted habitat mapping and elevation surveys using drones.ResultsAfter re-establishing tidal flow, sediment accretion was very rapid, leading to a deep...

EGU General Assembly Conference Abstracts, Apr 1, 2019

Sustainability, 2019

Sea-levels have been rising at a faster rate than expected. Because of the maladaptive outcomes o... more Sea-levels have been rising at a faster rate than expected. Because of the maladaptive outcomes of engineering-based hard coastal protection infrastructure, policy makers are looking for alternative adaptation approaches to buffer against coastal flooding—commonly known as nature-based coastal adaptation (NbCA). However, how to implement NbCA under an institutional structure demonstrating ‘inertia’ to alternative adaptation approaches is a question that seeks scientific attention. Building on a case study derived from a highly climate-vulnerable Canadian province, this study shows how the entrepreneurial use of scientific information and institutional opportunities helped institutional actors overcome the inertia. Drawing on secondary document analysis and primary qualitative data, this study offers five key lessons to institutional actors aiming at implementing NbCA: (i) develop knowledge networks to help avoid uncertainty; (ii) identify and utilize opportunities within existing in...

Salt marshes are a type of coastal wetland that are affected by dynamic coastal processes. Ice bl... more Salt marshes are a type of coastal wetland that are affected by dynamic coastal processes. Ice blocks and wrack (mats of plant debris) regularly float onto northern marshes and become stranded, affecting vegetation and soil accretion. There is little research regarding the capacity of ice and wrack to transport viable plant propagules onto marshes where they can colonize, which may be particularly important at barren new salt marsh restoration sites. Contributions of sediment by ice may also be important at restoration sites to raise the marsh platform to elevations appropriate for plant colonization. We collected ice (n = 27) and wrack (n = 18) samples at marshes in the Bay of Fundy, ran germination trials with the contents, and measured the quantity of sediment in the ice. We found viable propagules from halophytic and non-halophytic species in wrack, and viable propagules of Sporobolus pumilus in ice. Additionally, we found sediment densities between 0.01 and 4.75 g·cm−3 in ice b...

Danika van Proosdij1, Tim Milligan2, Gary Bugden2, and Karl Butler3 1. Department of Geography, S... more Danika van Proosdij1, Tim Milligan2, Gary Bugden2, and Karl Butler3 1. Department of Geography, Saint Mary’s University, 923 Robie St. Halifax, NS, B3H 3C3 Canada ¶ 2. Fisheries and Oceans Canada, Habitat Ecology Section, Bedford Institute of Oceanography, P.O. Box 1006, Halifax, NS, B2Y 4A2 Canada ¶ 3. Department of Geology, University of New Brunswick, P.O. Box 4400, Fredericton, NB, E3B 5A3 Canada

<p>This presentation will examine factors influencing the restoration traje... more <p>This presentation will examine factors influencing the restoration trajectory of tidal wetland restoration projects in Nova Scotia, Canada, and considerations for long term resilience.  Rates of relative sea level rise in Nova Scotia are projected up to 1.5 m by 2100 (RCP 8.5) and restoration of tidal wetlands are important for climate change adaptation and mitigation.  Over the last 15 years, CBWES, Saint Mary’s University and the Province have restored close to 400 ha of tidal wetland habitat by enlarging culverts or realigning dyke infrastructure.  Comprehensive pre and 5-year post restoration monitoring and insights from the <em>Making Room for Wetlands </em>project reveal marked differences in the rate of vegetation recolonization, surface elevation change and overall restoration trajectory between Atlantic and Fundy marshes.   Differences are also recorded between sites in the Lower Bay (6 m tidal range) and Upper Bay of Fundy (16 m tidal range).  This presentation will focus on the influence of sediment supply, tidal range (inundation frequency and duration), restoration design and seasonal timing of re-introduction of tidal flow on the rate of vegetation recolonization and implications for long term resilience.  </p>

EGU General Assembly Conference Abstracts, Apr 1, 2019

This repository contains Supplementary Data accompanying an initial submission of the article &qu... more This repository contains Supplementary Data accompanying an initial submission of the article "Automated Rapid Artefact Surface Area Measurement from Imagery with Computer Vision" submitted to the Journal of Lithic Studies.