Ecotone analysis: assessing the impact of vehicle transit on saltmarsh crab population and ecosystem

Trave, Claudia; Sheaves, Marcus

doi:10.1186/2193-1801-3-655

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…high population but less impact). Furthermore, disturbance by recreational vehicles, livestock and feral pigs is major threats to coastal wetlands, including tidal marshes (Trave & Sheaves, 2014; Wegscheidl et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Current and future carbon stocks in coastal wetlands within the Great Barrier Reef catchments

Costa

Lovelock

Waltham

et al. 2021

Global Change Biology

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Australia's Great Barrier Reef (GBR) catchments include some of the world's most intact coastal wetlands comprising diverse mangrove, seagrass and tidal marsh ecosystems. Although these ecosystems are highly efficient at storing carbon in marine sediments, their soil organic carbon (SOC) stocks and the potential changes resulting from climate impacts, including sea level rise are not well understood. For the first time, we estimated SOC stocks and their drivers within the range of coastal wetlands of GBR catchments using boosted regression trees (i.e. a machine learning approach and ensemble method for modelling the relationship between response and explanatory variables) and identified the potential changes in future stocks due to sea level rise. We found levels of SOC stocks of mangrove and seagrass meadows have different drivers, with climatic variables such as temperature, rainfall and solar radiation, showing significant contributions in accounting for variation in SOC stocks in mangroves. In contrast, soil type accounted for most of the variability in seagrass meadows. Total SOC stock in the GBR catchments, including mangroves, seagrass meadows and tidal marshes, is approximately 137 Tg C, which represents 9%–13% of Australia's total SOC stock while encompassing only 4%–6% of the total extent of Australian coastal wetlands. In a global context, this could represent 0.5%–1.4% of global SOC stock. Our study suggests that landward migration due to projected sea level rise has the potential to enhance carbon accumulation with total carbon gains between 0.16 and 0.46 Tg C and provides an opportunity for future restoration to enhance blue carbon.

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Section: Discussionmentioning

confidence: 99%

Current and future carbon stocks in coastal wetlands within the Great Barrier Reef catchments

Costa

Lovelock

Waltham

et al. 2021

Global Change Biology

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“…In contrast with terrestrial systems, there has been little examination of the importance of patch size and habitat width in most marine ecosystems (Jackson et al 2006). Edge effects have been shown to be important in the distribution of fish and mobile crustaceans in salt marshes (Minello and Rozas 2002;Minello et al 2008Minello et al , 2012Sousa and Dangremond 2011;Trave and Sheaves 2014) and seagrass (Smith et al 2011), but there is currently no understanding of the importance of patch width on habitat use by fish in mangroves (Faunce and Serafy 2006).…”

Section: Introductionmentioning

confidence: 99%

Effects of forest width on fish use of fringing mangroves in a highly urbanised tropical estuary

Dunbar

Baker

Sheaves

2017

Mar. Freshwater Res.

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The size and shape of a habitat patch can influence patterns of species utilisation. The present study examined how the width of fringing mangrove habitats affects the composition and use patterns of the fish assemblage using mangrove edge habitats on the flooding tide. Underwater cameras surveyed fish approaching mangrove habitats, ranging from a thin fringe 5m wide to forests over 75m wide, in a highly modified tropical estuary. The fish assemblage composition was similar across all mangrove widths, although the temporal patterns of use varied among mangrove widths for some species. The mean maximum number of individuals in the field of view was similar among mangrove widths, but fish were visible for a significantly greater proportion of time in videos from narrow (<20m) than wide (≥20m) mangrove stands (15v. 3% respectively). At least some fish were visible in the field of view in narrow mangrove fringes throughout the first hour of the flood tide, whereas in wide mangroves areas the presence of fish declined over time. The findings suggest that estuarine fish are using mangrove edge habitat regardless of width, making narrow mangroves viable habitats for estuarine fish.

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Assessing Tidal Hydrodynamics in a Tropical Seascape Using Structure‐from‐Motion Photogrammetry and 2D Flow Modelling

Vulliet,

Koci,

Jarihani

et al. 2023

Estuaries and Coasts

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Tidal wetlands continue to be threatened by changes in seascape hydrological regime and connectivity resulting from human activities (e.g. urbanisation, engineered barriers) and climate change. Reliable and parsimonious models that can be used by managers and practitioners to simulation tidal wetland hydroperiod dynamics (duration, depth, and frequency of tidal inundation) at high-resolution are limited presumably because these ecosystems have very low elevation across their flooding plain. Here, we developed a two-dimensional hydrodynamic model parameterised using a high-resolution (3 cm) and accurate (8-cm RMSE elevation error) digital elevation model (DEM) and land cover map (2-cm resolution) derived from unoccupied aerial vehicles (UAVs) structure from motion photogrammetry (SfM) to assist in the understanding of tidal wetland hydroperiod and hydrological connectivity of an upper tidal Australian tropical seascape. Ground-based water level datasets were used to calibrate and validate the model with higher accuracy (RMSE = 7 cm between maximum observed and simulated depth). The high-resolution approach demonstrates how small changes in topography such as vehicle tracks can interfere with hydrological connectivity. Centimetre-changes in tidal height resulted in important variations (10 ha) in the total area of the wetland being inundated, suggesting that small anthropogenic modifications of tidal inputs (e.g. culverts and sea-level rise) might have important implications on tidal wetland inundation patterns. Despite challenges related to reconstructing topography in densely vegetated areas and obtaining bathymetric data, the method developed here represents an accurate and cost-effective approach to quantify tidal wetland hydroperiod. This approach assists in planning, defining, and implementing effective and measurable restoration and protection projects of tidal wetland ecosystems. Graphical Abstract

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Ecotone analysis: assessing the impact of vehicle transit on saltmarsh crab population and ecosystem

Cited by 5 publications

References 31 publications

Current and future carbon stocks in coastal wetlands within the Great Barrier Reef catchments

Current and future carbon stocks in coastal wetlands within the Great Barrier Reef catchments

Effects of forest width on fish use of fringing mangroves in a highly urbanised tropical estuary

Assessing Tidal Hydrodynamics in a Tropical Seascape Using Structure‐from‐Motion Photogrammetry and 2D Flow Modelling

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