Spatial and temporal patterns in sediment and water column nutrients in a eutrophic Southern California estuary

Boyle, Karleen A.; Kamer, Krista; Fong, Peggy

doi:10.1007/bf02803530

Cited by 34 publications

(30 citation statements)

References 57 publications

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“…Most previous work on spectral responses to nutrient enrichment has been conducted primarily in the laboratory with terrestrial plants lacking the high water and salt contents that characterize Salicornia and other succulent salt marsh plants. The few previous studies exploring use of spectral indices as temporal integrators of estuarine nutrient enrichment (Fong et al, 1998;Runcie et al, 2004;Boyle et al, 2004;Boyer & Fong, 2005;Cohen & Fong, 2006) were conducted either in experimental settings in the field under controlled conditions, or in laboratory microcosms that primarily used macro-algae.…”

Section: Discussionmentioning

confidence: 99%

“…The concentration of nutrients in the tissues of macro-algae or saltmarsh plants has been suggested as one such integrator of enrichment or eutrophication potential (Fong et al, 1998;Runcie et al, 2004;Boyle et al, 2004;Boyer & Fong, 2005;Cohen & Fong, 2006). Macro-algae and saltmarsh plants respond to seasonal and other variation by taking up nutrients differentially and using them partly for immediate growth; but they also store excess nutrients for future growth (Boyer et al, 2001;Kamer et al, 2001;Martins et al, 2001;Cohen & Fong, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Evaluating hyperspectral imaging of wetland vegetation as a tool for detecting estuarine nutrient enrichment

Siciliano

Wasson

Potts

et al. 2008

Remote Sensing of Environment

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluating hyperspectral imaging of wetland vegetation as a tool for detecting estuarine nutrient enrichment

Siciliano

Wasson

Potts

et al. 2008

Remote Sensing of Environment

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“…Re-mineralization processes in benthic sediments may be particularly important in coastal ecosystems that are characterized by episodic or low primary production; in these systems, nutrient release from benthic sediments could potentially provide a significant amount of dissolved nitrogen at critical times for sustaining productivity (see Boyle et al 2004;Cowan et al 1996;Rowe et al 1975). The majority of existing studies of benthic mineralization have focused on fine muddy sediments with high organic content (e.g., Berelson et al 1998;Boyer and Fong 2005;Boyle et al 2004;Cowan et al 1996). Nutrient cycling in coarse permeable sediments, including intertidal and continental shelf sands, has received considerably less attention (Rocha 2008).…”

Section: Introductionmentioning

confidence: 99%

Marine Macrophyte Wrack Inputs and Dissolved Nutrients in Beach Sands

Dugan

Hubbard

Page

et al. 2011

Estuaries and Coasts

123

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We investigated the role of sandy beaches in nearshore nutrient cycling by quantifying macrophyte wrack inputs and examining relationships between wrack accumulation and pore water nutrients during the summer dry season. Macrophyte inputs, primarily giant kelp Macrocystis pyrifera, exceeded 2. -N, and dissolved organic nitrogen (DON) in intertidal pore water varied significantly among beaches (ranges=1 to 6,553 μM and 7 to 2,006 μM, respectively). Intertidal DIN and DON concentrations were significantly correlated with wrack biomass. Surf zone concentrations of DIN were also strongly correlated with wrack biomass and with intertidal DIN, suggesting export of nutrients from re-mineralized wrack. Our results suggest beach ecosystems can process and re-mineralize substantial organic inputs and accumulate dissolved nutrients, which are subsequently available to nearshore waters and primary producers.

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“…TN varied with months, weeks, and days, and like TKN, larger temporal scales were more important, indicating that TN was temporally more consistent within a site than other nutrients. Literature suggests that TKN can vary with seasons (Boyle et al 2004) and months (EPA 2008), with differences often detected among consecutive (monthly) sampling times (EPA 2008). From the limited data available for TN, temporal variation appears less than that for other nutrients (TKN, NO x , etc.…”

Section: Temporal Variationmentioning

confidence: 99%

Spatial and temporal monitoring of coastal water quality: refining the way we consider, gather, and interpret patterns

Elsdon

Connell²

2009

Aquat. Biol.

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Environmental scientists are expected to provide interpretations about patterns across broad scales of space and time, but face the challenge that the environment can vary at smaller spatial scales than commonly recognised. We described spatial and temporal variability in nutrients and associated environmental parameters at sites associated with historical impacts to assess appropriate monitoring practices. Sites were selected on the basis of past research into nutrient-driven habitat change. Temporal variability was examined using a nested sampling design (i.e. days within weeks, weeks within months) that included monitoring nutrients and environmental parameters such as secchi depth, chlorophyll a, ammonia, total Kjeldahl nitrogen, total nitrogen (TN), and oxidised nitrogen. Impacted and control sites differed in nutrient concentration and Secchi depth, although sites did not differ on every sampling occasion. Impacted sites always ranked higher, based on means, in nutrient concentrations and were more turbid than control sites. In general, one impacted site had greater nutrient concentration and was more turbid than the other impacted site. Control sites typically had low and stable concentrations of TN. Variation over small time scales of days was large relative to variation at scales of weeks and months; these results warn that monitoring of long-term trends must be mindful of short-term variation and its capacity to confuse interpretations over broader time scales. In this regard, we make suggestions to improve the way we consider, gather, and interpret patterns in environmental data that almost always vary on small scales.

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Spatial and temporal patterns in sediment and water column nutrients in a eutrophic Southern California estuary

Cited by 34 publications

References 57 publications

Evaluating hyperspectral imaging of wetland vegetation as a tool for detecting estuarine nutrient enrichment

Evaluating hyperspectral imaging of wetland vegetation as a tool for detecting estuarine nutrient enrichment

Marine Macrophyte Wrack Inputs and Dissolved Nutrients in Beach Sands

Spatial and temporal monitoring of coastal water quality: refining the way we consider, gather, and interpret patterns

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