A Comparison of Water Quality Between Low- and High-Flow River Conditions in a Tropical Estuary, Hilo Bay, Hawaii

Wiegner, Tracy N.; Mead, Lucas H.; Molloy, Stephanie L.

doi:10.1007/s12237-012-9576-x

Cited by 21 publications

(22 citation statements)

References 70 publications

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“…2). Previous research has shown that the Wailuku River's discharge directly affects conditions in the Bay and is the only gauged river in the watershed (Wiegner et al 2013).…”

Section: Methodsmentioning

confidence: 99%

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Spatial and temporal microbial pollution patterns in a tropical estuary during high and low river flow conditions

Wiegner

Edens

Abaya

et al. 2017

Marine Pollution Bulletin

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Spatial and temporal patterns of coastal microbial pollution are not well documented. Our study examined these patterns through measurements of fecal indicator bacteria (FIB), nutrients, and physiochemical parameters in Hilo Bay, Hawai'i, during high and low river flow. >40% of samples tested positive for the human-associated Bacteroides marker, with highest percentages near rivers. Other FIB were also higher near rivers, but only Clostridium perfringens concentrations were related to discharge. During storms, FIB concentrations were three times to an order of magnitude higher, and increased with decreasing salinity and water temperature, and increasing turbidity. These relationships and high spatial resolution data for these parameters were used to create Enterococcus spp. and C. perfringens maps that predicted exceedances with 64% and 95% accuracy, respectively. Mapping microbial pollution patterns and predicting exceedances is a valuable tool that can improve water quality monitoring and aid in visualizing FIB hotspots for management actions.

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“…2). Previous research has shown that the Wailuku River's discharge directly affects conditions in the Bay and is the only gauged river in the watershed (Wiegner et al 2013).…”

Section: Methodsmentioning

confidence: 99%

“…is likely from the environment or animals as the occurrence of human-associated molecular markers did not correspond with elevated levels of Enterococcus spp. (Knee et al 2008, Vijayavel et al 2010, Wiegner et al 2013).…”

Section: Spatial Microbial Pollution Patternsmentioning

confidence: 99%

Spatial and temporal microbial pollution patterns in a tropical estuary during high and low river flow conditions

Wiegner

Edens

Abaya

et al. 2017

Marine Pollution Bulletin

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“…The robustness of the budgets were assessed in two ways. First, errors were assigned to each of the budget terms that were the product of two terms (e.g., benthic N 2 loss 5 benthic N 2 efflux rate x area) using the following formula (modified from (Eyre 1995): Table 2. Nitrogen loss via net denitrification and burial in different benthic habitats in the Hastings River Estuary, Camden Haven, and Wallis Lake.…”

Section: Nitrogen Budget Frameworkmentioning

confidence: 99%

“…Ecosystem scale budgets are a useful tool for constraining our knowledge about the sources and sinks of N in coastal systems (Nixon 1987;Eyre 1995). As such, there are many published N budgets for coastal systems, but few have directly measured rates of denitrification (e.g., Yoon and Benner 1992;Tuominen et al 1998;Eyre and Mckee 2002) or N burial (Eyre 1995) and even fewer have directly measured rates of denitrification and burial (Boynton et al 1995;Deutsch et al 2010), despite these two pathways being important internal sinks for N. Further, these N coastal budgets that include both measured rates of denitrification and burial are all in deep, nutrient enriched west European and eastern United States systems. In these studies, denitrification and burial measurements are typically only undertaken at muddy subtidal sites, although a recent Patuxent River Estuary budget on the east coast of the United States also included measurements in tidal marshes (Boynton et al 2008).…”

mentioning

confidence: 99%

The contribution of denitrification and burial to the nitrogen budgets of three geomorphically distinct Australian estuaries: Importance of seagrass habitats

Eyre

Maher

Sanders

2016

Limnology & Oceanography

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Nitrogen (N) loss from different benthic habitats via net denitrification and burial was quantified, and first-order N budgets were constructed, for three geomorphically distinct shallow warm temperate SouthEast Australian barrier estuaries. Seagrass communities were the most important benthic habitats for N loss via net denitrification due to a combination of their area and high denitrification rates. Similarly, the largest N loss via burial occurred in the seagrass communities in the Hastings River Estuary and Wallis Lake, but in contrast, the largest annual loss of N via burial in the Camden Haven occurred in the subtidal muds due to their large area. N inputs to the river-dominated Hasting River Estuary were dominated by diffuse sources from the catchment. Budget deficits in Camden Haven and Wallis Lake suggest that the largest input of N may have been from the ocean, although missing N-fixation and/or groundwater cannot be excluded. Export to the ocean was the largest loss of N in the Hasting River Estuary followed by net denitrification and then burial. Net denitrification was the largest loss of N in the Camden Haven and Wallis Lake followed by burial. As the systems mature (evolve) the burial of N per m 2 , the loss of N via denitrification per m 2 and the % of the total N load that is removed as fish per m 2 , all decrease. Overall N loss via denitrification for a given residence time may be higher in shallow and oligotrophic coastal systems with extensive seagrass habitats than deeper temperate systems.

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“…High water can dilute some pollutants but also entrain others, such as nitrogen leaching from flooded farmland (BryantMason et al, 2013;Wiegner et al, 2013). But even within the same river basin, differences in the source regions of the flood water can result in very different levels of dissolved nitrogen, phosphorus, and suspended solids (Morris, 2012).…”

Section: Floodsmentioning

confidence: 99%

Changes in weather and climate extremes: State of knowledge relevant to air and water quality in the United States

Peterson

Karl

Kossin

et al. 2013

Journal of the Air & Waste Management Association

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Air and water quality are impacted by extreme weather and climate events on time scales ranging from minutes to many months. This review paper discusses the state of knowledge of how and why extreme events are changing and are projected to change in the future. These events include heat waves, cold waves, floods, droughts, hurricanes, strong extratropical cyclones such as nor'easters, heavy rain, and major snowfalls. Some of these events, such as heat waves, are projected to increase, while others, with cold waves being a good example, will decrease in intensity in our warming world. Each extreme's impact on air or water quality can be complex and can even vary over the course of the event.Implications: Because extreme weather and climate events impact air and water quality, understanding how the various extremes are changing and are projected to change in the future has ramifications on air and water quality management.

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A Comparison of Water Quality Between Low- and High-Flow River Conditions in a Tropical Estuary, Hilo Bay, Hawaii

Cited by 21 publications

References 70 publications

Spatial and temporal microbial pollution patterns in a tropical estuary during high and low river flow conditions

Spatial and temporal microbial pollution patterns in a tropical estuary during high and low river flow conditions

The contribution of denitrification and burial to the nitrogen budgets of three geomorphically distinct Australian estuaries: Importance of seagrass habitats

Changes in weather and climate extremes: State of knowledge relevant to air and water quality in the United States

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