Sediment structure and physicochemical changes following tidal inundation at a large open coast managed realignment site

Abstract

a n d p hy sico c h e mi c al c h a n g e s followi n g ti d al in u n d a tio n a t a la r g e o p e n c o a s t m a n a g e d r e ali g n m e n t sit e. S ci e n c e of t h e Tot al E nvi ro n m e n t , 6 6 0. p p. 1 4 1 9-1 4 3 2. Do w nlo a d e d fro m: h t t p://i n si g h t. c u m b ri a. a c. u k/i d/ e p ri n t/ 4 5 2 8/ U s a g e o f a n y i t e m s f r o m t h e U n i v e r s i t y o f C u m b r i a' s i n s t i t u t i o n a l r e p o s i t o r y 'I n s i g h t' m u s t c o n f o r m t o t h e f o l l o w i n g f a i r u s a g e g u i d e l i n e s .

Effect of vegetation cover and sediment type on 3D subsurface structure and shear strength in saltmarshes

“…μCT has been applied extensively to agricultural soils to investigate the impact of subsurface structures on crucial soil functions such as water infiltration (Jarvis et al, 2017; Katuwal et al, 2015; Müller et al, 2018; Pot et al, 2020; Tracy et al, 2015), root–pore interactions and patterns of plant growth (Hu et al, 2020; Lucas et al, 2019; Pulido‐Moncada et al, 2020). In recent years, the technique has been extended to saltmarsh substrates (Dale et al, 2019; Spencer et al, 2017; Van Putte et al, 2019); however, distinguishing roots from pores is challenging because their greyscale values overlap due to the partial volume effect (Cnudde & Boone, 2013; Helliwell et al, 2013), especially in these complex heterogeneous substrates. Indeed, saltmarshes are transitional habitats formed by a constant interplay of sediment deposition and erosional processes, and where ground cover and other soil characteristics can vary rapidly both in space and time.…”

Ungrazed salt marsh has well connected soil pores and less dense sediment compared with grazed salt marsh: a CT scanning study

“…Water pathways carrying nutrients through the soil pores (micro and macropores) enhance the understanding of hydrological subsurface in salt marsh (Hu et al, 2018) and that has greater impact on ecosystem service and functions. Within salt marsh research, the application of CT is rather new, but was recently applied for porosity measurements and pore network characterizations to compare natural and restored salt marshes (Dale et al, 2019;Spencer et al, 2017;Van Putte et al, 2019), as well as root and rhizome visualization (Davey et al, 2011;Spencer et al, 2017;Wigand et al, 2016).…”

Nitrogen and Phosphorus Export After Flooding of Agricultural Land by Coastal Managed Realignment

“…4). The decreasing N loss from the soil is not only due to exhaustion of adsorbed NH4 + , but also a consequence of diminished N mineralization due to declining reactivity of organic-bound N in the flooded anoxic soil (French 2006;Burden et al 2013;Dale et al 2019). The lower NH4 + availability through time is also evident from the higher proportion of NO3observed in the overlying water (Fig.…”

“…Managed realignment not only provides a sustainable new line of coastal defense, but it also creates new coastal ecosystems with a potential high value for marine biodiversity and wildlife (Mander et al 2013;Brady and Boda 2017). The approach has over the past couple of decades become more common, but the knowledge of its physicochemical, biogeochemical and ecological implications is still limited (Pétillon et al 2014;Spencer et al 2017;Dale et al 2019).…”