Science Explorer

Exploring: Nutrient Cycling

Southwest Biological Science Center

https://www.usgs.gov/centers/sbsc/science-topics/nutrient-cycling (HTML Document 56.00 KB)

January 18, 2017

Nutrient cycling, connectivity and free-floating plant abundance in backwater lakes of the Upper Mississippi River

Modified 2016-01-29
https://www.umesc.usgs.gov/documents/publications/2013/houser_a_2013.html (HTML Document 10.65 KB)

Nutrient cycling, connectivity and free-floating plant abundance in backwater lakes of the Upper Mississippi River Houser, J. N., S. M. Giblin, W. F ... . James, H. A. Langrehr, J. T.  Rogala, J. F. Sullivan, B. R. Gray.  2013.  Nutrient cycling, connectivity and free-floating plant abundance in ... among hydraulic connectivity to the channel, nutrient cycling, FFP, submersed aquatic vegetation (SAV), and dissolved oxygen concentration (DO) in ten ... among hydraulic connectivity, nutrient cycling, FFP, SAV, and DO in the backwaters of a large, floodplain river. Keywords ...

Nutrient cycling, connectivity, and free-floating plant abundance in backwater lakes of the Upper Mississippi River

Modified 2014-01-21
https://pubs.er.usgs.gov/publication/70073367 (HTML Document 23.52 KB)

filamentous algae) which may adversely affect the ecosystem. We investigated associations among hydraulic connectivity to the channel, nutrient cycling, FFP ... dissolved oxygen concentration. These results illustrate important connections among hydraulic connectivity, nutrient cycling, FFP, SAV, and DO in the ... lakes. Water column nutrient concentrations were high, and FFP tissue was nutrient rich suggesting that the eutrophic condition of the UMR often ... facilitated abundant FFP. However, tissue nutrient concentrations, and the associations between FFP biomass and water column nutrient concentrations ...

Nitrogen and phosphorus in the Upper Mississippi River: Transport, processing, and effects on the river ecosystem

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70033911 (HTML Document 20.91 KB)

changes in nutrient concentrations and export, and their causes; (2) Nutrient cycling within the river; (3) Spatial and temporal patterns of river ... main channel. The specifics of in-river nutrient cycling and the effects of high rates of nutrient input on UMR have been less studied than the ... factors affecting nutrient input to the river and transport to the Gulf of Mexico, and important questions concerning nutrient cycling in the UMR remain ... nutrient concentrations; (4) Effects of elevated nutrient concentrations on the river; and (5) Actions to reduce river nutrient concentrations and flux ...

Nitrogen and phosphorus in the Upper Mississippi River: transport, processing, and effects on the river ecosystem

Modified 2016-01-29
https://www.umesc.usgs.gov/documents/publications/2010/houser_a_2010.html (HTML Document 11.27 KB)

; (2) Nutrient cycling within the river; (3) Spatial and temporal patterns of river nutrient concentrations; (4) Effects of elevated nutrient ... example, nitrate concentrations generally are much lower in off-channel areas than in the main channel. The specifics of in-river nutrient cycling and ... Gulf of Mexico, and important questions concerning nutrient cycling in the UMR remain. Eutrophication and resulting changes in river productivity have ... Mississippi River (UMR) can be organized into the following categories: (1) Long-term changes in nutrient concentrations and export, and their causes ...

The impact of biotic/abiotic interfaces in mineral nutrient cycling: A study of soils of the Santa Cruz chronosequence, California

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70032283 (HTML Document 22.05 KB)

The impact of biotic/abiotic interfaces in mineral nutrient cycling: A study of soils of the Santa Cruz chronosequence, California Geochimica et ... interface, indicating closed nutrient cycling within the root zone, whereas Mg variability below the A/B interface denotes downward leakage resulting from ... indicating that Ca nutrient cycling is closed to these external inputs. Small net positive K and Ca fluxes (6-14molm -2yr -1), based on annual mass balances ... publication details Title: The impact of biotic/abiotic interfaces in mineral nutrient cycling: A study of soils of the Santa Cruz chronosequence, California Series title: ...

The impact of biotic/abiotic interfaces in mineral nutrient cycling: A study of soils of the Santa Cruz chronosequence, California

Modified 2012-02-02
https://pubs.er.usgs.gov/publication/70005993 (HTML Document 23.07 KB)

The impact of biotic/abiotic interfaces in mineral nutrient cycling: A study of soils of the Santa Cruz chronosequence, California Geochimica et ... nutrient gradients, reflecting biological cycling in the shallower soils, from downward chemical weathering gradients in the deeper soils. The A/B ... beneath the A/B interface, indicating closed nutrient cycling within the root zone, whereas Mg variability below the A/B interface denotes downward ... factors fall outside these envelopes indicating that Ca nutrient cycling is closed to these external inputs. Small net positive K and Ca fluxes (6–14 ...

Nitrogen cycling processes and microbial community composition in bed sediments in the Yukon River at Pilot Station

Modified 2016-02-29
https://pubs.er.usgs.gov/publication/70168739 (HTML Document 24.15 KB)

contribution of nitrogen (N)-cycling processes in bed sediments to river nutrient fluxes in large northern latitude river systems is limited. This ... microbial community composition rather than river nutrient concentrations at Pilot Station. Study Area Nitrogen cycling processes and microbial ... Nitrogen cycling processes and microbial community composition in bed sediments in the Yukon River at Pilot Station Journal of Geophysical Research ... study examined the relationship between N-cycling processes in bed sediments and N speciation and loading in the Yukon River near its mouth at the ...

Nutrient Sources and Cycling in Aquatic Systems

Modified 2015-08-04
https://toxics.usgs.gov/meetings/2009_FallAGU_Nutrients.html (HTML Document 14.22 KB)

Nutrient Sources and Cycling in Aquatic Systems The U.S. Geological Survey (USGS), University of Pittsburgh , and The City University of New York ... cosponsored the special session "Nutrient Sources and Cycling in Aquatic Systems" at the 2009 AGU Fall Meeting, San Francisco, California, December 14-18 ... , 2009. The session highlighted the latest research on the fate and cycling of nutrients in aquatic environments. USGS science presented at the ... ., nitrogen, phosphorous, organic carbon) have a profound impact on ecosystems and water quality. Spatial and temporal variations in nutrient loading ...

UMESC - Aquatic Sciences - Nutrient Loading and Effects

Modified 2016-01-29
https://www.umesc.usgs.gov/aquatic/nutrients.html (HTML Document 11.80 KB)

Project Title

Ecosystem Services

https://www.usgs.gov/science/ecosystem-services (HTML Document 42.11 KB)

such as nutrient cycling, climate regulation, and maintenance of biodiversity. Ecosystems also provide marketable goods like seafood and timber. ...

Dynamics of nutrient cycling and related benthic nutrient and oxygen fluxes during a spring phytoplankton bloom in South San Francisco Bay (USA)

Modified 2016-07-27
https://pubs.er.usgs.gov/publication/70022285 (HTML Document 19.94 KB)

Dynamics of nutrient cycling and related benthic nutrient and oxygen fluxes during a spring phytoplankton bloom in South San Francisco Bay (USA ... of nutrient cycling were very different at the shallow and deep study sites, illustrating the challenge of extrapolating measurements of coupled ... algae-nutrient dynamics to whole ecosystems. Additional publication details Title: Dynamics of nutrient cycling and related benthic nutrient and oxygen ... : RIS Abstract Benthic oxygen uptake and nutrient releases of N, P and Si were measured weekly at 2 sites in South San Francisco Bay around the 1996 ...

Soil microbial and nutrient responses to 7 years of seasonally altered precipitation in a Chihuahuan Desert grassland

Modified 2016-01-29
https://www.umesc.usgs.gov/documents/publications/2014/erickson_b_2014.html (HTML Document 10.71 KB)

belowground ecosystem processes such as decomposition and nutrient cycling by altering soil microbial community structure and function. The objective ... -term effects on nutrient cycling and plant P uptake in this desert grassland. Keywords   ... Soil microbial and nutrient responses to 7 years of seasonally altered precipitation in a Chihuahuan Desert grassland Bell, C.W., Tissue, D.T., Loik ... , M.E., Wallenstein, M.D., Acosta-Martinez,V., Erickson, R.A., Zak, J.C., 2014. Soil microbial and nutrient responses to 7 years of seasonally altered ...

USGS FRESC: Calcium oxalate contribution to calcium cycling in forests of contrasting nutrient status - Details

Modified 2013-01-31
https://fresc.usgs.gov/products/ProductDetails.aspx?ProductNumber=53319 (HTML Document 18.84 KB)

Title: Calcium oxalate contribution to calcium cycling in forests of contrasting nutrient status Type: JournalArticle Year: 2014 Volume: 334 Pages ... : 64-73 DOI: http://dx.doi.org/10.1016/j.foreco.2014.08.029 Calcium Oxalate Contributes to Calcium Cycling in Forests Calcium is important for many ... soil acidification deplete ecosystem calcium pools. Full Citation Dauer, J.M., Perakis, S.S., 2014, Calcium oxalate contribution to calcium cycling in ... forests of contrasting nutrient status: Forest Ecology and Management, v. 334, p. 64-73, http://dx.doi.org/10.1016/j.foreco.2014.08.029 . Page Last Modified: 1/31/2013 ...

Toward a transport-based analysis of nutrient spiraling and uptake in streams

Modified 2017-01-18
https://pubs.er.usgs.gov/publication/70031733 (HTML Document 21.64 KB)

experiments are designed to study the cycling of nutrients in stream ecosystems where hydrologic and nonhydrologic processes determine nutrient fate. Because ... Toward a transport-based analysis of nutrient spiraling and uptake in streams Limnology and Oceanography: Methods Abstract Nutrient addition ... of the importance of hydrologic processes in stream ecosystems, a conceptual model known as nutrient spiraling is frequently employed. A central part ... of the nutrient spiraling approach is the determination of uptake length (SW), the average distance traveled by dissolved nutrients in the water ...

Convergent responses of nitrogen and phosphorus resorption to nitrogen inputs in a semiarid grassland

Modified 2014-05-19
https://pubs.er.usgs.gov/publication/70105981 (HTML Document 24.42 KB)

. Accordingly, resorption patterns have marked ecological implications for plant population and community fitness, as well as for ecosystem nutrient cycling ... coupled biogeochemical cycling of N and phosphorus (P), and still fewer data exist regarding how increased N inputs affect the internal cycling of ... these two elements in plants. Nutrient resorption is an important driver of plant nutrient economies and of the quality of litter plants produce ... . In a semiarid grassland in northern China, we studied the effects of a wide range of N inputs on foliar nutrient resorption of two dominant grasses ...

Incorporating phosphorus cycling into global modeling efforts: a worthwhile, tractable endeavor

Modified 2015-09-28
https://pubs.er.usgs.gov/publication/70155915 (HTML Document 18.78 KB)

New Phytologist Myriad field, laboratory, and modeling studies show that nutrient availability plays a fundamental role in regulating CO 2 exchange ... that incorporating phosphorus cycling represents an important next step in coupled climate–carbon cycling model development, particularly for lowland ...

Groundwater nutrient concentrations near an incised midwestern stream: Effects of floodplain lithology and land management

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70033295 (HTML Document 19.87 KB)

Biogeochemistry By: Abstract It has been recognized that subsurface lithology plays an important role in controlling nutrient cycling and transport ... -rich, and fine-grained loam. In this paper, we describe and evaluate spatial and temporal patterns of lithology and groundwater nutrient ... the stream reduced the grass cover to bare ground and allowed assessment of the effects of land management on nutrient concentrations. Results indicated ... that groundwater in Holocene alluvium is very nutrient rich with background concentrations of nitrogen, phosphorus and dissolved organic carbon that ...

The impact of introduced round gobies (Neogobius melanostomus) on phosphorus cycling in central Lake Erie

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70028997 (HTML Document 19.50 KB)

The impact of introduced round gobies (Neogobius melanostomus) on phosphorus cycling in central Lake Erie Canadian Journal of Fisheries and Aquatic ... sampling. As an abundant introduced fish, we predicted that round gobies would influence phosphorus cycling both directly, through excretion, and ... gobies consumed <0.2% of dreissenid population biomass, indicating that round gobies did not reduce nutrient availability by consuming dreissenids ... . Compared with previous studies that have revealed introduced species to influence phosphorus cycling, round gobies likely did not attain a sufficiently ...

Patterns and controls on nitrogen cycling of biological soil crusts

Modified 2016-09-06
https://pubs.er.usgs.gov/publication/70176219 (HTML Document 20.45 KB)

this chapter, we review the influence of biocrust nutrient input, internal cycling, and loss pathways across a range of biomes. We examine linkages ... Patterns and controls on nitrogen cycling of biological soil crusts By: Nichole N. Barger, Eli Zaady, Bettina Weber, Ferran Garcia-Pichel ... in biocrusts is critically important to our broader understanding of N cycling in dryland environments. In particular, N cycling by biocrusts likely ... in understanding the influence of biocrusts on ecosystem N cycling, there are important knowledge gaps in our understanding of the influence of ...