2006
DOI: 10.4319/lo.2006.51.1_part_2.0671
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Eutrophication and trophic state in rivers and streams

Abstract: Many natural streams are net heterotrophic, so I propose that trophic state be divided into autotrophic and heterotrophic state. This division allows consideration of the influence of external carbon sources as well as nutrients such as nitrogen and phosphorus. Empirical results suggest that phosphorus and nitrogen are the most important nutrients regulating autotrophic state in flowing waters and that benthic algal biomass is positively correlated to gross primary production in streams. Reference (minimally i… Show more

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Cited by 378 publications
(311 citation statements)
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“…Building on the trophic state classification systems for lakes (Carlson 1977;OECD 1982), Dodds (2006) developed a new trophic state classification system for rivers and streams. Dodds' study revisits some of the ideas discussed 30 yr ago by Gene Likens, who presented a conceptual diagram of relationships between allochthonous inputs, autochthonous inputs, and the trophic state of freshwater lakes (see fig.…”
Section: Nutrient Limitation Of Stream and Wetland Productivity-mentioning
confidence: 99%
“…Building on the trophic state classification systems for lakes (Carlson 1977;OECD 1982), Dodds (2006) developed a new trophic state classification system for rivers and streams. Dodds' study revisits some of the ideas discussed 30 yr ago by Gene Likens, who presented a conceptual diagram of relationships between allochthonous inputs, autochthonous inputs, and the trophic state of freshwater lakes (see fig.…”
Section: Nutrient Limitation Of Stream and Wetland Productivity-mentioning
confidence: 99%
“…N:P ratios are widely used as a key indicator for diagnosis of trophic state and limiting nutrients in the ecosystems (Shannon & Brezonik 1972). The high N:P mass ratios of 17 indicate phosphorus limitation in the ecosystem and low N:P ratios of B4 indicate nitrogen limitation (Forsberg & Ryding 1980;Dodds 2006). This reference indicates that our streams largely have severe phosphorus limitation (Elwood et al 1981), based on the N:P ratio calculations on the trophic components.…”
Section: Biological Compositions On N:p Ratiosmentioning
confidence: 99%
“…Since the initial review of Vollenweider (1968) relating nutrient supply to lake trophic state, subsequent explorations have been done and several eutrophication indicators have been employed. Chlorophyll-a, as a proxy of phytoplankton biomass, merits its use owing to its importance in trophic relationships and ease of analysis (OECD 1982, Dodds 2006. To constitute a good trophic level indicator, a comprehensive knowledge of aquatic system dynamics and functioning is needed, given that it is not only influenced by nutrient supply but also by other environmental factors.…”
Section: Introductionmentioning
confidence: 99%