Primary production, plant and detrital biomass, and particle transport in the Columbia River Estuary

Small, Lawrence F.; McIntire, C. David; MacDonald, K. B.; Lara-Lara, José Rubén; Frey, Bruce E.; Amspoker, Michael C.; Winfield, Ted P.

doi:10.1016/0079-6611(90)90007-o

Cited by 62 publications

(59 citation statements)

References 26 publications

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“…Our investigations also support the hypotheses that 1) reduced input of macrodetritus from wetland habitat loss in the estuary has undermined salmonid food webs, and 2) such losses are not compensated by enhanced delivery of phytoplankton and microdetritus to the estuary from upriver reservoirs (Sherwood et al 1990;Small et al 1990;Bottom et al 2005). Juvenile salmon throughout the estuary fed on insect prey produced in wetlands and other shallow habitats, and energy flow to salmon was linked to wetland detritus.…”

Section: Discussionsupporting

confidence: 72%

“…At the same time, enhanced phytoplankton production, which occurs in the reservoirs behind mainstem dams, increased the amount of microdetritus delivered from upriver sources by approximately 31,000 t C year -1 (Sherwood et al 1990). Fluvial phytoplankton now accounts for approximately 58% of the carbon available in the estuary compared with only 37% available from vascular plants (Small et al 1990). …”

Section: Estuarine Food Websmentioning

confidence: 99%

“…Comparison from mixing model results of available organic matter from estimates of total production (mg C year -1 ) to the organic matter utilized by subyearling Chinook salmon. Estimates of production are from Small et al (1990) of 1980 conditions in the Columbia River estuary.…”

Section: Estuarine Food Websmentioning

confidence: 99%

See 2 more Smart Citations

Salmon Life Histories, Habitat, and Food Webs in the Columbia River Estuary: An Overview of Research Results, 2002-2006.

Bottom¹,

Anderson²,

Baptisa³

2008

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Section: Discussionsupporting

confidence: 72%

Section: Estuarine Food Websmentioning

confidence: 99%

See 1 more Smart Citation

Salmon Life Histories, Habitat, and Food Webs in the Columbia River Estuary: An Overview of Research Results, 2002-2006.

Bottom¹,

Anderson²,

Baptisa³

2008

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“…The influence of tides in macrotidal estuaries increases the residence times of both water and suspended matter. This forms MTZs, where photosynthesis is strongly limited by light availability (Cole et al 1992;Fishez et al 1992;Irigoien and Castel 1997) and where allochthonous materials originating from soil erosion and river-borne phytoplankton detritus are predominant (Relexans et al 1988;Small et al 1990;Bianchi et al 1993). Heterotrophic activity, enhanced by high turbidity (Crump et al 1998), results in a net mineralization of a major part of the particulate organic carbon (POC) (Wollast 1983;Smith and Hollibaugh 1993;Keil et al 1996;Gattuso et al 1998), producing CO 2 that interacts with the carbonate system (Kempe and E. Lemaire (DGO) for analytical help.…”

mentioning

confidence: 99%

Oxic/anoxic oscillations and organic carbon mineralization in an estuarine maximum turbidity zone (The Gironde, France)

Abril

Etcheber

Hir³

et al. 1999

Limnology & Oceanography

152

121

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The study of vertical particle dynamics in the highly turbid Gironde Estuary has shown intense cycles of sedimentation and resuspension at both diurnal and neap-spring time scales. Fluid mud, with suspended particulate matter (SPM) concentrations between 50 and 500 g liter ) preferentially reworked at the neap-spring time scale. Due to the alternation of sedimentation and resuspension periods, most of the sediment experienced oxic/anoxic oscillations throughout the neap-spring cycle. Fluid mud resuspension occurred without any observable incidence on the surface-water oxygenation. An increase in total alkalinity was found in the fluid mud, due to both anaerobic respiration and a carbonate dissolution coupled to aerobic respiratory CO 2 generation. This phenomenon significantly affected the inorganic carbon budget of the estuary, increasing the HCO input to the coastal ocean and reducing the CO 2 flux to the atmosphere. An Ϫ 3 accumulation of labile-dissolved organic carbon observed in the fluid mud suggests that these oscillations result in an acceleration of particulate organic matter (POM) decomposition. In the Gironde MTZ, a net loss of refractory land-derived POM occurs. This system acts as an efficient oxic/suboxic ''fluidized bed reactor,'' similar to mobile deltaic muds.Understanding processes affecting carbon distribution through estuaries is of major importance for a better assessment of the contribution of world rivers to the carbon budget of the coastal ocean. The influence of tides in macrotidal estuaries increases the residence times of both water and 1 Present address: Université de Liège, Mécanique des Fluides Géophysiques, Unité d'Océanographie Chimique, Institut de Physique (B5), B-4000 Sart Tilman, Belgium. AcknowledgmentsThis work has been funded by the European Commission in the framework of the Biogest project (ENV4-CT96-0213); this is a contribution of the Eloise Projects network. It was also supported by the URM 13 project, linking IFREMER and the University of Bordeaux I.-DGO-UMR 5805. Fieldwork was carried out onboard the RV Gwen Drez (IFREMER, France), the RVs Côte d'Aquitaine and Côte de la Manche (INSU, France), and the RV Belgica (Belgium); we thank captains and crews. A. De Resseguier (DGO) built the fluid mud sampler and was present on the field for sampling assistance. We are grateful to P. Castaing and A. Sottolichio (DGO) for help in using the OBS and to A. V. Borges (University of Liège)

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“…Unlike streams in nontidal upland regions, semidiurnal and spring-neap variation in water level in the CRE imposes a structuring force on both geophysical features and biota, especially as distance to the mouth of the river decreases. Water elevation fluctuations, keyed to site topography, directly determine periods of inundation and salinity intrusion (Kukulka and Jay 2003a, b) and this in turn structures plant communities and fish habitat use (Thomas 1983;Fox et al 1984;Small et al 1990). The tidal cycle controls the magnitude and duration of bidirectional current velocities that cause sedimentation/erosion and the evolution of geomorphological features like tidal channels and levees (Hume and Bell 1993).…”

Section: Core Monitored Metricsmentioning

confidence: 99%

Protocols for Monitoring Habitat Restoration Projects in the Lower Columbia River and Estuary

Roegner¹,

Diefenderfer²,

Borde³

et al. 2008

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Protocols for Monitoring Habitat Restoration Projects in the Lower Columbia River and Estuaryiii AbstractThis document describes a set of protocols developed by the National Marine Fisheries Service of the National Oceanographic and Atmospheric Administration, Pacific Northwest National Laboratory, and the Columbia River Estuary Study Taskforce with the support of the U.S. Army Corps of Engineers. These protocols are designed for researchers and managers monitoring the effectiveness of actions to restore degraded wetland habitat in the lower Columbia River and estuary (CRE). The intent is to promote a standard set of monitoring protocols to assess and compare habitat restoration projects in the region.The goal of many restoration activities in the CRE is to repair the connectivity and function of wetland habitats, and thereby to allow juvenile salmon to regain benefit from these important rearing and refuge areas. To do this effectively, researchers and managers require the means to 1) evaluate the results of individual restoration activities, 2) compare results among projects, and 3) determine the long-term and cumulative effects of habitat restoration on the overall estuary ecosystem. To help achieve this, we have developed a standardized set of monitoring protocols. We limited the number of metrics to a proposed "core" set and selected measurement methods that are straightforward and economical to use. By "core," we mean an optimum suite of metrics that can adequately detail the results of restoration, depending on the goals of the restoration action and financial and logistical limitations of comprehensively monitoring ecological change over extended temporal and spatial scales. We selected core metrics based on the following criteria: 1) correspond to commonly held restoration project goals; 2) are applicable to all sites; 3) characterize controlling factors, ecosystem structure, and ecosystem function; 4) are relevant to both present and future investigations; and 5) are practical in terms of level of effort.In this document, we summarize the types of restoration strategies being planned and implemented in the CRE. We then propose a set of metrics and statistical design for restoration monitoring activities based on commonly shared ecological goals. Finally, we provide specific protocols for this set of estuary monitoring metrics. Monitoring protocols are provided for hydrology (water surface elevation); water quality (temperature, salinity); elevation (topography); landscape features (remote sensing); plant community (composition and cover); vegetation plantings (success); and fish community (species, temporal presence, size/age structure).

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Primary production, plant and detrital biomass, and particle transport in the Columbia River Estuary

Cited by 62 publications

References 26 publications

Salmon Life Histories, Habitat, and Food Webs in the Columbia River Estuary: An Overview of Research Results, 2002-2006.

Salmon Life Histories, Habitat, and Food Webs in the Columbia River Estuary: An Overview of Research Results, 2002-2006.

Oxic/anoxic oscillations and organic carbon mineralization in an estuarine maximum turbidity zone (The Gironde, France)

Protocols for Monitoring Habitat Restoration Projects in the Lower Columbia River and Estuary

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