An assessment of anthropogenic and climatic stressors on estuaries using a spatio-temporal GIS-modelling approach for sustainability: Towamba estuary, southeastern Australia

Al-Nasrawi, Ali K. M.; Hamylton, Sarah; Jones, Brian G.

doi:10.1007/s10661-018-6720-5

Cited by 13 publications

(8 citation statements)

References 42 publications

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“…In the face of changes in the frequency and intensity of rainfall as well as changes in temperature and sea levels, the salinity equilibrium in estuaries will also be altered ( Short and Neckles, 1999 ; Alongi, 2008 ; Dolbeth et al, 2011 ). The Amazon River Basin is considered a hotspot for exposure to natural hazards ( de Almeida et al, 2016 ) since significant changes in hydrology caused by rising temperatures (evaporation, stream flow and estuarine mixing of the sea and the river) will lead to more complex effects on ecosystem dynamics ( Gillanders and Kingsford, 2002 ; Day et al, 2008 ; Milliman et al, 2008 ). Changes in the tidal regime, salinity and hydrology lead to changes in the structural development and distribution of estuarine species ( Schaeffer-Novelli et al, 2002 ; Cunha-Lignon et al, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Extremophiles as a Model of a Natural Ecosystem: Transcriptional Coordination of Genes Reveals Distinct Selective Responses of Plants Under Climate Change Scenarios

et al. 2018

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The goal of this research was to generate networks of co-expressed genes to explore the genomic responses of Rhizophora mangle L. populations to contrasting environments and to use gene network analysis to investigate their capacity for adaptation in the face of historical and future perturbations and climatic changes. RNA sequencing data were generated for R. mangle samples collected under field conditions from contrasting climate zones in the equatorial and subtropical regions of Brazil. A gene co-expression network was constructed using Pearson’s correlation coefficient, showing correlations among 78,364 transcriptionally coordinated genes. Each region exhibited two distinct network profiles; genes correlated with the oxidative stress response showed higher relative expression levels in subtropical samples than in equatorial samples, whereas genes correlated with the hyperosmotic salinity response, heat response and UV response had higher expression levels in the equatorial samples than in the subtropical samples. In total, 992 clusters had enriched ontology terms, which suggests that R. mangle is under higher stress in the equatorial region than in the subtropical region. Increased heat may thus pose a substantial risk to species diversity at the center of its distribution range in the Americas. This study, which was performed using trees in natural field conditions, allowed us to associate the specific responses of genes previously described in controlled environments with their responses to the local habitat where the species occurs. The study reveals the effects of contrasting environments on gene expression in R. mangle, shedding light on the different abiotic variables that may contribute to the genetic divergence previously described for the species through the use of simple sequence repeats (SSRs). These effects may result from two fundamental processes in evolution, namely, phenotypic plasticity and natural selection.

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Section: Introductionmentioning

confidence: 99%

Extremophiles as a Model of a Natural Ecosystem: Transcriptional Coordination of Genes Reveals Distinct Selective Responses of Plants Under Climate Change Scenarios

et al. 2018

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“…In general, studies that only consider inter-annual dynamics have longer temporal frames than those concentrating on intra-annual dynamics (Figure 5a,b). Of the studies that only monitor inter-annual dynamics, many studies investigate long Landsat time series-the longest going back to the first available scenes from Landsat 1 [70,[90][91][92][93][94][95][96]. Few studies consider even longer timeframes, all of those make use of "niche" satellite sensors that were not originally developed for EO but for espionage [27,[97][98][99][100] or historic aerial imagery [101].…”

Section: Spatial and Temporal Scales Of The Studiesmentioning

confidence: 99%

“…LIDAR systems as well as hyperspectral optical sensors are not used for water surface delineation in any of the studies reviewed. Even though a number of studies successfully include LIDAR datasets as auxiliary topographic datasets and for altimetry [4,90,98,137,[143][144][145][146] most studies analyzing water storage use auxiliary altimetry datasets. There are approaches that investigate the storage-area relationship based on optical and topographic or bathymetric data [147][148][149][150].…”

Section: Sensors and Sensor Typesmentioning

confidence: 99%

Remote Sensing of Surface Water Dynamics in the Context of Global Change—A Review

2022

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Inland surface water is often the most accessible freshwater source. As opposed to groundwater, surface water is replenished in a comparatively quick cycle, which makes this vital resource—if not overexploited—sustainable. From a global perspective, freshwater is plentiful. Still, depending on the region, surface water availability is severely limited. Additionally, climate change and human interventions act as large-scale drivers and cause dramatic changes in established surface water dynamics. Actions have to be taken to secure sustainable water availability and usage. This requires informed decision making based on reliable environmental data. Monitoring inland surface water dynamics is therefore more important than ever. Remote sensing is able to delineate surface water in a number of ways by using optical as well as active and passive microwave sensors. In this review, we look at the proceedings within this discipline by reviewing 233 scientific works. We provide an extensive overview of used sensors, the spatial and temporal resolution of studies, their thematic foci, and their spatial distribution. We observe that a wide array of available sensors and datasets, along with increasing computing capacities, have shaped the field over the last years. Multiple global analysis-ready products are available for investigating surface water area dynamics, but so far none offer high spatial and temporal resolution.

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“…There are very few studies that have investigated a relationship between land cover, wetland change, and metrics that describe the physical geography of a location. Other than erosion/accretion related to shoreline change and area of coastal features [60][61][62], most studies do not holistically investigate changing coastal riverine dynamics and land cover change. Therefore, one of the main contributions of this research was to investigate these metrics to see if there is a pattern and to measure the spatial and statistical relationships among several characteristics through time.…”

Section: Compare Land Cover Change and Physical Geography Characterismentioning

confidence: 99%

A Multi-Decadal Investigation of Tidal Creek Wetland Changes, Water Level Rise, and Ghost Forests

Magolan

Halls

2020

Remote Sensing

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Coastal wetlands play a vital role in protecting coastlines, which makes the loss of forested and emergent wetlands devastating for vulnerable coastal communities. Tidal creeks are relatively small hydrologic areas that feed into larger estuaries, are on the front lines of the interface between saltwater and freshwater ecosystems, and are potentially the first areas to experience changes in sea level. The goal of this study was to investigate wetland changes through time at two tidal creeks (Smith Creek and Town Creek) of the Cape Fear River estuary in southeastern North Carolina, USA, to determine if there is a spatial relationship between habitat change, physical geography characteristics, and the rate of wetland migration upstream. Historic aerial photography and recent satellite imagery were used to map land cover and compute change through time and were compared with derived physical geography metrics (sinuosity, creek width, floodplain width, floodplain elevation, and creek slope). The primary results were: (1) there was a net gain in emergent wetlands even accounting for the area of wetlands that became water, (2) wetlands have migrated upstream at an increasing rate through time, (3) land cover change was significantly different between the two creeks (P = 0.01) where 14% (67.5 ha) of Smith Creek and 18% (272.3 ha) of Town Creek transitioned from forest to emergent wetland, and (4) the transition from emergent wetland to water was significantly related to average change in creek width, floodplain elevation, and average water level. In conclusion, this research correlated habitat change with rising water level and identified similarities and differences between neighboring tidal creeks. Future research could apply the methodologies developed here to other coastal locations to further explore the relationships between tides, sea level, land cover change, and physical geography characteristics.The coastal counties surrounding the Cape Fear River have experienced a large increase in urban population where, from 1970 to 2010, New Hanover County experienced a 144% increase in population and Brunswick County a 343% increase [24]. With population growth, and the potential loss of natural areas including forested wetlands, there is an increased coastal vulnerability to storm surge inundation and pluvial flooding. To investigate land cover change under increasing tidal range, relative sea-level rise, and urban development, two tidal creeks of the Cape Fear River estuary, Smith Creek (34.257029, -77.929373) and Town Creek (34.135822, -78.001620) were investigated in this study (Figure 1). Town Creek, 33 km from the mouth of the Cape Fear River, is characterized by expansive wetlands, and is very long for a tidal creek at 53 km [25]. Further upstream, 18 km from Town Creek, is Smith Creek which is much shorter in length (17 km) and is surrounded by urban development. While Smith Creek and Town Creek have notable differences, these creeks were chosen because: (1) they are in close proximity, which is good for compari...

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An assessment of anthropogenic and climatic stressors on estuaries using a spatio-temporal GIS-modelling approach for sustainability: Towamba estuary, southeastern Australia

Cited by 13 publications

References 42 publications

Extremophiles as a Model of a Natural Ecosystem: Transcriptional Coordination of Genes Reveals Distinct Selective Responses of Plants Under Climate Change Scenarios

Extremophiles as a Model of a Natural Ecosystem: Transcriptional Coordination of Genes Reveals Distinct Selective Responses of Plants Under Climate Change Scenarios

Remote Sensing of Surface Water Dynamics in the Context of Global Change—A Review

A Multi-Decadal Investigation of Tidal Creek Wetland Changes, Water Level Rise, and Ghost Forests

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