Retention and Transport of Nutrients in a Third-Order Stream: Channel Processes

Ecology ◽  
1989 ◽  
Vol 70 (6) ◽  
pp. 1877-1892 ◽  
Author(s):  
Frank J. Triska ◽  
Vance C. Kennedy ◽  
Ronald J. Avanzino ◽  
Gary W. Zellweger ◽  
Kenneth E. Bencala
Keyword(s):  
Stream Channel ◽  
Channel Processes ◽  
Third Order ◽  
Order Stream

In Situ Retention-Transport Response to Nitrate Loading and Storm Discharge in a Third-Order Stream

1990 ◽  
Vol 9 (3) ◽  
pp. 229-239 ◽  
Author(s):  
Frank J. Triska ◽  
Vance C. Kennedy ◽  
Ronald J. Avanzino ◽  
Gary W. Zellweger ◽  
Kenneth E. Bencala
Keyword(s):  
Third Order ◽  
Order Stream ◽  
Transport Response

Microbiological water quality of a temperate third-order stream

2019 ◽  
Vol 30 (2) ◽  
pp. 417-426 ◽  
Author(s):  
Maria Soledad Rodriguez ◽  
Melina Celeste Crettaz-Minaglia ◽  
Diamela Gianello ◽  
Mercedes Piaggio
Keyword(s):  
Water Quality ◽  
Third Order ◽  
Order Stream ◽  
Microbiological Water Quality

Retention and Transport of Nutrients in a Third-Order Stream in Northwestern California: Hyporheic Processes

Ecology ◽  
1989 ◽  
Vol 70 (6) ◽  
pp. 1893-1905 ◽  
Author(s):  
Frank J. Triska ◽  
Vance C. Kennedy ◽  
Ronald J. Avanzino ◽  
Gary W. Zellweger ◽  
Kenneth E. Bencala
Keyword(s):  
Third Order ◽  
Order Stream

scholarly journals Rapid and Stable Microbial Community Assembly in the Headwaters of a Third-Order Stream

2019 ◽  
Vol 85 (11) ◽  
Author(s):  
Morgan E. Teachey ◽  
Jacob M. McDonald ◽  
Elizabeth A. Ottesen
Keyword(s):  
Microbial Community ◽  
Microbial Diversity ◽  
Community Assembly ◽  
Fine Scale ◽  
Third Order ◽  
Order Stream ◽  
Bacterioplankton Community ◽  
Small Streams ◽  
Temporal And Spatial ◽  
Over Time

ABSTRACTSmall streams and their headwaters are key sources of microbial diversity in fluvial systems and serve as an entry point for bacteria from surrounding environments. Community assembly processes occurring in these streams shape downstream population structure and nutrient cycles. To elucidate the development and stability of microbial communities along the length of a first- through third-order stream, fine-scale temporal and spatial sampling regimes were employed along McNutt Creek in Athens, GA, USA. 16S rRNA amplicon libraries were constructed from samples collected on a single day from 19 sites spanning the first 16.76 km of the stream. To provide context for this spatial study and evaluate temporal variability, selected sites at the stream’s upper, mid, and lower reaches were sampled daily for 5 days preceding and following the spatial study. In a second study, three sites at and near the creek’s headwaters were sampled daily for 11 days to understand initial bacterioplankton community assembly. Both studies revealed decreasing alpha and beta diversity with increasing downstream distance. These trends were accompanied by the enrichment of a small fraction of taxa found at low abundance in headwater-proximal sites. Similar sets of taxa consistently increased in relative abundance in downstream samples over time scales ranging from 1 day to 1 year, many of which belong to clades known to be abundant in freshwater environments. These results underpin the importance of headwaters as the site of rapid in-stream selection that results in the reproducible establishment of a highly stable community of freshwater riverine bacteria.IMPORTANCEHeadwater streams are critical introduction points of microbial diversity for larger connecting rivers and play key roles in the establishment of taxa that partake in in-stream nutrient cycling. We examined the microbial community composition of a first- through third-order stream using fine-scale temporal and spatial regimes. Our results show that the bacterioplankton community develops rapidly and predictably from the headwater population with increasing total stream length. Along the length of the stream, the microbial community exhibits substantial diversity loss and enriches repeatedly for select taxa across days and years, although the relative abundances of individual taxa vary over time and space. This repeated enrichment of a stable stream community likely contributes to the stability and flexibility of downstream communities.

Fire disturbance during climate change: failure of postfire forest recovery on a boreal floodplain

2004 ◽  
Vol 34 (11) ◽  
pp. 2294-2305 ◽  
Author(s):  
Élodie Bouchon ◽  
Dominique Arseneault
Keyword(s):  
Climate Change ◽  
Black Spruce ◽  
Abies Balsamea ◽  
Fire Disturbance ◽  
Forest Recovery ◽  
Balsam Fir ◽  
Future Climate Change ◽  
Forest Site ◽  
Stream Channel ◽  
Order Stream

We used tree remains to document the failure of postfire forest recovery following a 1941 fire on a boreal floodplain along a third-order stream in northern Quebec. Two sites, one with postfire shrubs and the other an unburned forest, were studied. Tree remains on the floodplain and within the stream channel at the shrub site suggest the former presence of a forest stand similar to present-day vegetation at the forest site. At both sites, black spruce (Picea mariana (Mill.) BSP) has been the dominant tree species, whereas eastern larch (Larix laricina (Du Roi) K. Koch) and balsam fir (Abies balsamea (L.) Mill.) have made up only a small proportion of all living and dead stems. Sustained tree recruitment before the mid-19th century was followed by much reduced recruitment, in synchrony with the well-documented increasing trend of winter precipitation in northern Quebec. In combination with more frequent spring floods during the 20th century, the 1941 fire at the shrub site probably reduced the density of conifer stems, increased the abundance of shrubs, and excluded the fire-sensitive balsam fir and eastern larch. The fire also abruptly increased inputs of tree remains into the stream channel. Because of low establishment rate and slow growth of postfire conifers, forest recovery towards prefire tree density is unlikely under present-day conditions. Frequent fires in boreal landscapes, along with the anticipated increase of precipitation, suggest that some floodplains and associated streams may respond similarly to future climate change.

Structure, functional organization and biological traits of macroinvertebrate assemblages from leaf-bags and benthic samples in a third-order stream of Central Apennines (Italy)

2014 ◽  
Vol 46 ◽  
pp. 84-91 ◽  
Author(s):  
Antonio Di Sabatino ◽  
Giovanni Cristiano ◽  
Maurizio Pinna ◽  
Paola Lombardo ◽  
Francesco Paolo Miccoli ◽  
...  
Keyword(s):  
Functional Organization ◽  
Biological Traits ◽  
Third Order ◽  
Central Apennines ◽  
Order Stream ◽  
Macroinvertebrate Assemblages ◽  
Leaf Bags
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