The Riverine Productivity Model: An Heuristic View of Carbon Sources and Organic Processing in Large River Ecosystems

Oikos ◽  
1994 ◽  
Vol 70 (2) ◽  
pp. 305 ◽  
Author(s):  
James H. Thorp ◽  
Michael D. Delong
Keyword(s):  
Carbon Sources ◽  
Large River ◽  
River Ecosystems ◽  
Heuristic View ◽  
Riverine Productivity Model

Fatty acids as biomarkers to indicate main carbon sources of four major invertebrate families in a large River (the Allier, France)

2010 ◽  
Vol 177 (1) ◽  
pp. 39-55 ◽  
Author(s):  
Aurélie Descroix ◽  
Alexandre Bec ◽  
Gilles Bourdier ◽  
Denis Sargos ◽  
Jeremy Sauvanet ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Carbon Sources ◽  
Large River ◽  
Main Carbon

scholarly journals Large herbivorous wildlife and livestock differentially influence the relative importance of different sources of carbon for riverine food webs

2021 ◽  
Author(s):  
Frank O. Masese ◽  
Thomas Fuss ◽  
Lukas Bistarelli ◽  
Caroline Buchen-Tschiskale ◽  
Gabriel Singer
Keyword(s):  
Organic Matter ◽  
Food Webs ◽  
Aquatic Ecosystems ◽  
Carbon Sources ◽  
Large River ◽  
Livestock Grazing ◽  
Relative Importance ◽  
River Continuum ◽  
Aquatic Food ◽  
Different Sources

In many regions around the world, large populations of native wildlife have declined or been replaced by livestock grazing areas and farmlands, with consequences on terrestrial-aquatic ecosystems connectivity and trophic resources supporting food webs in aquatic ecosystems. The river continuum concept (RCC) and the riverine productivity model (RPM) predict a shift of carbon supplying aquatic food webs along the river: from terrestrial inputs in low-order streams to autochthonous production in mid-sized rivers. Here, we studied the influence of replacing large wildlife (mainly hippos) with livestock on the relative importance of C3 vegetation, C4 grasses and periphyton on macroinvertebrates in the Mara River, which is an African montane-savanna river known to receive large subsidy fluxes of terrestrial carbon and nutrients mediated by LMH, both wildlife and livestock. Using stable carbon (δ13C) and nitrogen (δ15N) isotopes, we identified spatial patterns of the relative importance of allochthonous carbon from C3 and C4 plants (woody vegetation and grasses, respectively) and autochthonous carbon from periphyton for macroinvertebrates at various sites of the Mara River and its tributaries. Potential organic carbon sources and invertebrates were sampled at 80 sites spanning stream orders 1 to 7, various catchment land uses (forest, agriculture and grasslands) and different loading rates of organic matter and nutrients by LMH (livestock and wildlife, i.e., hippopotamus). The importance of different sources of carbon along the river did not follow predictions of RCC and RPM. First, the importance of C3 and C4 carbon was not related to river order or location along the fluvial continuum but to the loading of organic matter (dung) by both wildlife and livestock. Notably, C4 carbon was important for macroinvertebrates even in large river sections inhabited by hippos. Second, even in small 1st -3rd order forested streams, autochthonous carbon was a major source of energy for macroinvertebrates, and this was fostered by livestock inputs fuelling aquatic primary production throughout the river network. Importantly, our results show that replacing wildlife (hippos) with livestock shifts river systems towards greater reliance on autochthonous carbon through an algae-grazer pathway as opposed to reliance on allochthonous inputs of C4 carbon through a detrital pathway.

Interactions between alien species and restoration of large-river ecosystems.

Large Rivers ◽  
2003 ◽  
Vol 15 (1-4) ◽  
pp. 133-145
Author(s):  
David L. Strayer ◽  
Elizabeth A. Blair ◽  
Nina F. Caraco ◽  
Jonathan J. Cole ◽  
Stuart Findlay ◽  
...  
Keyword(s):  
Alien Species ◽  
Large River ◽  
River Ecosystems

Carbon Sources Supporting Large River Food Webs: A Review of Ecological Theories and Evidence from Stable Isotopes

2012 ◽  
Vol 5 (2) ◽  
pp. 85-103 ◽  
Author(s):  
Michael A. Pingram ◽  
Kevin J. Collier ◽  
David P. Hamilton ◽  
Bruno O. David ◽  
Brendan J. Hicks
Keyword(s):  
Stable Isotopes ◽  
Food Webs ◽  
Carbon Sources ◽  
Large River ◽  
Ecological Theories

Applying concepts of general resilience to large river ecosystems: A case study from the Upper Mississippi and Illinois rivers

2019 ◽  
Vol 101 ◽  
pp. 1094-1110 ◽  
Author(s):  
Kristen L. Bouska ◽  
Jeffrey N. Houser ◽  
Nathan R. De Jager ◽  
Molly Van Appledorn ◽  
James T. Rogala
Keyword(s):  
Large River ◽  
River Ecosystems
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