scholarly journals Decomposition of terrestrial resource subsidies in headwater streams: Does consumer diversity matter?

Ecosphere ◽  
2017 ◽  
Vol 8 (6) ◽  
Author(s):  
David Stoker ◽  
Amber J. Falkner ◽  
Kelly M. Murray ◽  
Ashley K. Lang ◽  
Thomas R. Barnum ◽  
...  
Keyword(s):  
Headwater Streams ◽  
Resource Subsidies ◽  
Consumer Diversity

Diverse resource-use strategies in a large-bodied marine predator guild: evidence from differential use of resource subsidies and intraspecific isotopic variation

2019 ◽  
Vol 623 ◽  
pp. 71-83 ◽  
Author(s):  
ON Shipley ◽  
AJ Gallagher ◽  
DS Shiffman ◽  
L Kaufman ◽  
N Hammerschlag
Keyword(s):  
Resource Use ◽  
Resource Subsidies ◽  
Isotopic Variation ◽  
Marine Predator ◽  
Predator Guild

FLASHINESS OF HEADWATER STREAMS WITHIN THE CONTEXT OF SEASONAL CHANGES IN EVAPOTRANSPIRATION AND DIFFERING LAND USE

2018 ◽  
Author(s):  
Peter Whitehouse ◽  
◽  
Heather Mase ◽  
Forrest Parrott ◽  
Chris Paradise ◽  
...  
Keyword(s):  
Land Use ◽  
Seasonal Changes ◽  
Headwater Streams

Catchment topography and the distribution of electron donors for denitrification control the nitrate concentration in headwater streams of the Lake Hachiro watershed

2020 ◽  
pp. 1-13
Author(s):  
Atsushi Hayakawa ◽  
Yu Funaki ◽  
Tatsuya Sudo ◽  
Ryoki Asano ◽  
Hirotatsu Murano ◽  
...  
Keyword(s):  
Headwater Streams ◽  
Nitrate Concentration ◽  
Electron Donors

Influence of leaf miners and environmental quality on litter breakdown in tropical headwater streams

Hydrobiologia ◽  
2021 ◽  
Vol 848 (6) ◽  
pp. 1311-1331
Author(s):  
Vivian de Mello Cionek ◽  
Fábio Nascimento Oliveira Fogaça ◽  
Timothy Peter Moulton ◽  
Laryssa Helena Ribeiro Pazianoto ◽  
Guilherme Okuda Landgraf ◽  
...  
Keyword(s):  
Environmental Quality ◽  
Headwater Streams ◽  
Litter Breakdown ◽  
Leaf Miners

Intermittency mediates macroinvertebrate and crayfish effects on leaf breakdown in temperate headwater streams

2020 ◽  
Author(s):  
Amanda Bates Vanlandingham ◽  
Richard H. Walker ◽  
Adam Alford ◽  
Sally A. Entrekin
Keyword(s):  
Headwater Streams ◽  
Leaf Breakdown

scholarly journals Legacy of Human Impact on Geomorphic Processes in Mountain Headwater Streams in the Perspective of European Cultural Landscapes

Geosciences ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 253
Author(s):  
Tomáš Galia
Keyword(s):  
Human Impact ◽  
Cultural Landscapes ◽  
Headwater Streams ◽  
Timber Harvesting ◽  
Anthropogenic Pressure ◽  
Catchment Scale ◽  
Morphological Response ◽  
Mountain Ranges ◽  
Outer Western Carpathians ◽  
Geomorphic Processes

Mountain headwater streams are still somewhat on the boundary of interest regarding possible human impact on their morphology or geomorphic processes, which may be caused by our perception of mountains as islands of relatively preserved natural conditions. This paper summarizes the past and present human pressure on the headwater streams that drain the highest mountain ranges of the Outer Western Carpathians in Czechia. Anthropogenic pressure began in this region in the 16th century during a colonization of the mountains and continued by timber harvesting, timber floating, and construction of torrent control works until present. Each of these interventions produced a morphological response of the channels in relation to altered sediment or water fluxes at the whole catchment scale or within longitudinal stream profiles. Because it is highly unlikely to reach pre-settlement conditions of the channels, the management effort should be concentrated to achieve realistic restoration targets under the present socioeconomic circumstances by taking into consideration the morphodynamical specifics of mountain headwater streams.

scholarly journals Soil microbial inoculation during flood events shapes headwater stream microbial communities and diversity

2021 ◽  
Author(s):  
Florian Caillon ◽  
Katharina Besemer ◽  
Peter Peduzzi ◽  
Jakob Schelker
Keyword(s):  
Microbial Diversity ◽  
Bacterial Diversity ◽  
Soil Water ◽  
Headwater Streams ◽  
High Flow ◽  
Low Flow ◽  
Flood Events ◽  
Flow Conditions ◽  
Soil Microbial ◽  
Microbial Inoculation

AbstractFlood events are now recognized as potentially important occasions for the transfer of soil microbes to stream ecosystems. Yet, little is known about these “dynamic pulses of microbial life” for stream bacterial community composition (BCC) and diversity. In this study, we explored the potential alteration of stream BCC by soil inoculation during high flow events in six pre-alpine first order streams and the larger Oberer Seebach. During 1 year, we compared variations of BCC in soil water, stream water and in benthic biofilms at different flow conditions (low to intermediate flows versus high flow). Bacterial diversity was lowest in biofilms, followed by soils and highest in headwater streams and the Oberer Seebach. In headwater streams, bacterial diversity was significantly higher during high flow, as compared to low flow (Shannon diversity: 7.6 versus 7.9 at low versus high flow, respectively, p < 0.001). Approximately 70% of the bacterial operational taxonomic units (OTUs) from streams and stream biofilms were the same as in soil water, while in the latter one third of the OTUs were specific to high flow conditions. These soil high-flow OTUs were also found in streams and biofilms at other times of the year. These results demonstrate the relevance of floods in generating short and reoccurring inoculation events for flowing waters. Moreover, they show that soil microbial inoculation during high flow enhances microbial diversity and shapes fluvial BCC even during low flow. Hence, soil microbial inoculation during floods could act as a previously overlooked driver of microbial diversity in headwater streams.

A Cross-System Comparison of Bacterial and Fungal Biomass in Detritus Pools of Headwater Streams

2002 ◽  
Vol 43 (1) ◽  
pp. 55-66 ◽  
Author(s):  
S. Findlay ◽  
J. Tank ◽  
S. Dye ◽  
H.M. Valett ◽  
P.J. Mulholland ◽  
...  
Keyword(s):  
Fungal Biomass ◽  
Headwater Streams ◽  
Cross System

scholarly journals Effects of seasonality and resource limitation on organic matter turnover by Chironomidae (Diptera) in southern Appalachian headwater streams

2010 ◽  
Vol 55 (3) ◽  
pp. 1083-1092 ◽  
Author(s):  
Angela M. Romito ◽  
Susan L. Eggert ◽  
Jeffrey M. Diez ◽  
J. Bruce Wallace
Keyword(s):  
Organic Matter ◽  
Headwater Streams ◽  
Resource Limitation ◽  
Southern Appalachian ◽  
Organic Matter Turnover
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