Groundwater salinity in a floodplain forest impacted by saltwater intrusion

Kaplan, D. A.; Muñoz‐Carpena, Rafael

doi:10.1016/j.jconhyd.2014.04.005

Cited by 12 publications

(7 citation statements)

References 42 publications

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“…Initially developed for analysis of economic models (Engle & Watson, ; Geweke, ), DFA has more recently been applied to better understand a variety of physical and biological processes, from commercial fisheries production (Begoña Santos et al, ; Erzini et al, ; Pérez‐Rodríguez, ; Scarcella et al, ; Zuur & Pierce, ), to groundwater and soil moisture dynamics (Kaplan & Muñoz‐Carpena, , ; Kaplan, Muñoz‐Carpena, & Ritter, ; Kovács, Márkus, & Gábor, ; Ritter & Muñoz‐Carpena, ), to large‐scale variation in rainfall and vegetation cover (Campo‐Bescós et al, ; Kuo, Chu, Pan, & Yu, ), and links between long‐term climate and tree growth (Linares & Camarero, ; Linares & Tíscar, ).…”

Section: Methodsmentioning

confidence: 99%

Hydrological controls of fisheries production in a major Amazonian tributary

Lima

Kaplan

2017

Ecohydrology

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Amazonian rivers are characterized by a strongly seasonal flood pulse, which is being altered by ongoing and planned hydropower development across the basin. Changes in hydrology have a cascade of physical, ecological, and social effects, and some ecohydrological changes in the Amazon are expected to be irreversible. To better understand these linkages, we investigated shared trends and causal factors driving fish catch in a major Amazonian tributary before dam construction to derive relationships between catch and natural hydrologic dynamics that can be used to assess likely post‐dam fisheries impacts. We applied a time series‐based dimension reduction technique (dynamic factor analysis) to investigate dynamics in fish catch across 10 commercially important species using daily fish landings and hydrological data. We found a 4‐trend dynamic factor model to best fit the observed data, with fitted trends exhibiting variation representative of seasonal and longer‐term hydrologic variation. We next considered 11 candidate explanatory time series and found the best dynamic factor model used 4 explanatory variables: maximum water level, flooding duration, previous year's flow, and rate of change in flow; however, each species showed a unique response to this set of hydrological variables. Species‐specific responses suggested that future dam operating rules need to closely mimic the natural hydrologic regime in order to maintain the biological dynamics of this and similarly diverse systems. In particular, high flows associated with increased catch the following year are important to maintain, but may be difficult to achieve in the context of reservoir regulation and energy production goals.

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Section: Methodsmentioning

confidence: 99%

Hydrological controls of fisheries production in a major Amazonian tributary

Lima

Kaplan

2017

Ecohydrology

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“…During periods of drought, brackish and freshwater wetlands face stress from reductions in rainfall and freshwater flows with subsequent influences on SWI in surface water and groundwater (Kaplan et al. , b, Kaplan and Muñoz‐Carpena ). Without relief from saltwater stress, vegetation dies back, eventually converting to salt marsh or open water (Drexler and Ewell ).…”

Section: Drivers Of Saltwater Intrusion In Coastal Wetlandsmentioning

confidence: 99%

Restore or retreat? saltwater intrusion and water management in coastal wetlands

White

Kaplan

2017

Ecosyst Health Sustain

159

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Coastal wetlands perform a unique set of physical, chemical, and biological functions, which provide billions of dollars of ecosystem services annually. These wetlands also face myriad environmental and anthropogenic pressures, which threaten their ecological condition and undermine their capacity to provide these services. Coastal wetlands have adapted to a dynamic range of natural disturbances over recent millennia, but face growing pressures from human population growth and coastal development. These anthropogenic pressures are driving saltwater intru sion (SWI) in many coastal systems. The position of coastal wetlands at the terrestrial-marine interface also makes them vulnerable to increasing rates of sea level rise and changing climate. Critically, anthropogenic and natural stressors to coastal wetlands can act synergistically to create negative, and sometimes catastrophic, consequences for both human and natural systems. This review focused on the drivers and impacts of SWI in coastal wetlands and has two goals: (1) to synthesize understanding of coastal wetland change driven by SWI and (2) to review approaches for improved water management to mitigate SWI in impacted systems. While we frame this review as a choice between restoration and retreat, we acknowledge that choices about coastal wetland management are context-specific and may be confounded by competing management goals. In this setting, the choice between restoration and retreat can be prioritized by identifying where the greatest return in ecosystem services can be achieved relative to restoration dollars invested. We conclude that restoration and proactive water management is feasible in many impacted systems.

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“…They conclude that degradation rates were limited by both availability of electron acceptors and phosphate. The second paper by Kaplan and Muñoz-Carpena (2014-in this issue) looks at how saltwater intrusion interacts with a forested floodplain through groundwater. High resolution water quality data revealed seasonal and annual dynamics and helped in the development of a multilinear model that could be used to investigate management scenarios.…”

Section: This Special Issuementioning

confidence: 99%