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

Contribution of macroinvertebrates to leaf breakdown in the Okpara River, Bénin.

2019 ◽  
Vol 23 (4) ◽  
pp. 107-116
Author(s):  
Tchaou C. Madina ◽  
Gouissi F. Modeste ◽  
Abahi K. Simon ◽  
Adje D. Darius ◽  
Orou P. Zoulkanerou ◽  
...  
Keyword(s):  
Leaf Breakdown

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

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

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.

The influence of fish on leaf breakdown in a Virginia pond

1987 ◽  
Vol 18 (1) ◽  
pp. 45-51 ◽  
Author(s):  
FRANK TAYLOR ◽  
ALBERT C. HENDRICKS
Keyword(s):  
Leaf Breakdown
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