Influence of Watershed Runoff on Nutrient Dynamics in a Southern California Salt Marsh

Page, Henry M.; Petty, Robert L.; Meade, Daniel E.

doi:10.1006/ecss.1995.0059

Cited by 55 publications

(23 citation statements)

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“…1). Carpinteria Reef (CA), located directly offshore (0.1 to 0.2 km) of a small salt marsh (93 ha) and coastal plain developed for intensive agriculture (Page et al 1995, Robinson 2006) was expected to be more influenced by freshwater runoff and to possess a lower standing crop of giant kelp than the other reefs. The reefs at Arroyo Quemado (AQ) and Mohawk (MO) were located 0.1 to 0.2 km offshore and had historically abundant giant kelp, whereas Naples Reef (NA), located further offshore (1.8 km), was anticipated to be less influenced by freshwater inputs and to have more variable giant kelp.…”

Section: Study Reefsmentioning

confidence: 99%

“…The streams draining the coastal plain contain exceptionally high concentrations of dissolved and particulate N, which is discharged to the coastal ocean (Page et al 1995, Robinson 2006. Dissolved inorganic N may be taken up by algae directly, whereas particulate bound N species may be deposited on the benthos and become available for assimilation through remineralization to inorganic N over time.…”

mentioning

confidence: 99%

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Assessing the importance of land and marine sources of organic matter to kelp forest food webs

Page¹,

Reed²,

Brzezinski³

et al. 2008

Mar. Ecol. Prog. Ser.

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We used stable isotope analysis to investigate the relative importance of marine and terrestrial sources of organic matter to the food web of 4 nearshore reefs in the Santa Barbara Channel (California, USA) over a 4 yr period that included substantial variability in the availability of marine and terrestrial organic matter. We measured stable C and N isotope values of ocean-and landderived sources of organic matter and of different types of consumers on reefs that varied in exposure to freshwater runoff and in biomass of giant kelp. δ

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Section: Study Reefsmentioning

confidence: 99%

mentioning

confidence: 99%

Assessing the importance of land and marine sources of organic matter to kelp forest food webs

Page¹,

Reed²,

Brzezinski³

et al. 2008

Mar. Ecol. Prog. Ser.

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“…The region has a semiarid climate typical of southern California, with annual average temperatures ranging from 10.2 to 21.7°C and an annual average rainfall of 44.7 cm, 92% of which falls from November through April. The CSM has historically received elevated levels of nitrate from upland agricultural activities (57).…”

Section: Methodsmentioning

confidence: 99%

“…How denitrifier communities and their functions may vary with environmental and pollutant factors in salt marshes remains largely unknown. Therefore, the objective of this study was to examine, for a salt marsh system with high nitrate loading (57), the spatial gradients of microbial community composition and denitrification enzyme activities (DEAs), the relationships of community composition and function to environmental factors as well as to each other, and the potential effects of metals considered here to be sedimentary pollutants that could affect denitrifiers and denitrification (12,18).…”

mentioning

confidence: 99%

Microbial Community Composition and Denitrifying Enzyme Activities in Salt Marsh Sediments

Cao

Green

Holden

2008

Appl Environ Microbiol

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Denitrifying microbial communities and denitrification in salt marsh sediments may be affected by many factors, including environmental conditions, nutrient availability, and levels of pollutants. The objective of this study was to examine how microbial community composition and denitrification enzyme activities (DEA) at a California salt marsh with high nutrient loading vary with such factors. Sediments were sampled from three elevations, each with different inundation and vegetation patterns, across 12 stations representing various salinity and nutrient conditions. Analyses included determination of cell abundance, total and denitrifier community compositions (by terminal restriction fragment length polymorphism), DEA, nutrients, and eluted metals. Total bacterial (16S rRNA) and denitrifier (nirS) community compositions and DEA were analyzed for their relationships to environmental variables and metal concentrations via multivariate direct gradient and regression analyses, respectively. Community composition and DEA were highly variable within the dynamic salt marsh system, but each was strongly affected by elevation (i.e., degree of inundation) and carbon content as well as by selected metals. Carbon content was highly related to elevation, and the relationships between DEA and carbon content were found to be elevation specific when evaluated across the entire marsh. There were also lateral gradients in the marsh, as evidenced by an even stronger association between community composition and elevation for a marsh subsystem. Lastly, though correlated with similar environmental factors and selected metals, denitrifier community composition and function appeared uncoupled in the marsh.

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“…Masukan elemen dari darat (elemen alogenik) melalui aliran air sungai serta pengaruh kondisi hidrodinamika perairan (arus) juga berpengaruh terhadap fluktuasi tersebut (Page et al, 1995;Renshun, 1992).…”

Section: Pendahuluanunclassified

Sebaran Material Organik dan Zat Hara Oleh Arus Pasang Surut di Muara Sungai Demaan, Jepara (The Distribution of Organic Matter and Nutrients by Tidal Current at Demaan Estuary, Jepara)

2015

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Influence of Watershed Runoff on Nutrient Dynamics in a Southern California Salt Marsh

Cited by 55 publications

References 0 publications

Assessing the importance of land and marine sources of organic matter to kelp forest food webs

Assessing the importance of land and marine sources of organic matter to kelp forest food webs

Microbial Community Composition and Denitrifying Enzyme Activities in Salt Marsh Sediments

Sebaran Material Organik dan Zat Hara Oleh Arus Pasang Surut di Muara Sungai Demaan, Jepara (The Distribution of Organic Matter and Nutrients by Tidal Current at Demaan Estuary, Jepara)

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