Effects of Nutrient Replacement on Benthic Macroinvertebrates in an Ultraoligotrophic Reach of the Kootenai River, 2003–2010

  title={Effects of Nutrient Replacement on Benthic Macroinvertebrates in an Ultraoligotrophic Reach of the Kootenai River, 2003–2010},
  author={G. Wayne Minshall and Bahman Shafii and William J. Price and Charlie Holderman and Paul J. Anders and Gary T. Lester and Pat Barrett},
  booktitle={Freshwater Science},
Abstract: Large impoundments remove substantial amounts of sediment and nutrients from rivers and often limit production by downstream primary producers and secondary consumers. Nutrient levels and macroinvertebrate and fish abundance in the lower Kootenai River (7th order, mean annual discharge = 454 m3/s) in Idaho and Montana declined dramatically after Libby Dam was built in 1972. A subsequent study implicated ultraoligotrophic conditions (total dissolved P [TDP] ≤ 2 µg/L TDP) as a… 

Changes in Primary Producer and Consumer Communities in Response to Upstream Nutrient Addition in the Kootenai River, Idaho

Abstract The purpose of this study was to assess potential effects of nutrient addition in the previously unassessed lower Kootenai River (Meander Reach), 44–155 km downstream from the nutrient

Aquatic Plant and Dissolved Oxygen Changes in a Reference‐Condition Prairie Stream Subjected to Experimental Nutrient Enrichments

Effects of controlled nutrient additions on a prairie stream were studied using a before‐after‐control‐impact paired design. The site is in a reference condition with low soluble nitrate (NO3) and

Nutrient uptake during low-level fertilization of a large, seventh-order oligotrophic river

Uptake of nitrogen (total nitrogen (TN), NH4-N, and NO3-N) and phosphorus (total dissolved phosphorus (TDP) and total phosphorus (TP)) was quantified June through September 2009–2011 using

River management alters ecosystem metabolism in a large oligotrophic river

Algae and aquatic plants support river food webs through in-situ primary production. However, gross primary production (GPP) and ecosystem respiration (ER) are rarely evaluated in the context of

Consequences of Didymo Blooms in the Transnational Kootenay River Basin

Stream habitat changes that affect primary consumers often indirectly impact secondary consumers such as fishes. Blooms of the benthic algae Didymosphenia geminata (Didymo) represent one such habitat

Longitudinal variation in macroinvertebrate assemblages below a large-scale hydroelectric dam

Worldwide, dams have had pervasive impacts on their associated river systems. In this study, we examined the effects of a large-scale dam on the downstream macroinvertebrate assemblages of a 65-km

Disturbance, nutrients, and antecedent flow conditions affect macroinvertebrate community structure and productivity in an Arctic river

Climate change is expected to alter disturbance regimes and biogeochemical cycles that underlie the structure and function of ecosystems worldwide. In the Arctic, rapid warming is already affecting

Unraveling the nexus of multi-environmental factors and benthic macroinvertebrates in typical inflow river of Taihu Lake in China

The environmental factors are significantly correlated with the abundance and biomass of benthic macroinvertebrate by taking interacts of multi-environmental factors into account, providing scientific basis for water environment health management and pollution control in Taihu Basin river network area.

Fine-Scale Effects of Boat Moorings on Soft Sediment Communities Masked in Large-Scale Comparisons

Population growth is driving demand for recreational marine infrastructure, resulting in extensive coastal habitat modification. Boat moorings, for example, are popular for vessel storage and are

Response of Fish Population Dynamics to Mitigation Activities in a Large Regulated River

AbstractExtensive water development in large rivers has precipitated many negative ecological effects on native fish populations. Mitigation for such development often focuses on restoring biological



Characterization of the Kootenai River Aquatic Macroinvertebrate Community before and after Experimental Nutrient Addition, 2003-2006. [Chapter 3]

The Kootenai River ecosystem has experienced numerous ecological changes since the early 1900s. Some of the largest impacts to habitat, biological communities, and ecological function resulted from

An energy budget for the Kootenai River, Idaho (USA), with application for management of the Kootenai white sturgeon, Acipenser transmontanus

Abstract.An energy budget provides a useful tool for examining the exchange of energy between trophic levels. In this study we examined the potential for autotrophic productivity and organic material

Experimental Enrichment of a Coastal Stream in British Columbia: Effects of Organic and Inorganic Additions on Autotrophic Periphyton Production

Periphyton accumulation rates and alkaline phosphatase activity were examined in reaches of the Keogh River, British Columbia, following additions of grain and inorganic fertilizer as separate treatments during spring–summer 1981, and additions of labile organic matter to nutrient-deficient coastal areas were suggested.

N and P limitation of benthos abundance in the Nechako River, British Columbia

Additions of inorganic N and P to replicated stream mesocosms were used to test the hypothesis that production of the benthic food web in the flow-controlled Nechako River, B.C., was N and P limited.

Benthic algal and insect responses to nutrient enrichment of an in-stream mesocosm

A nutrient bioassay was conducted in the Slocan River in southeastern British Columbia to evaluate potential trophic level responses in advance of whole-stream enrichment. A mesocosm approach was

Increased Juvenile Salmonid Growth by Whole-River Fertilization

The results suggest that autochthonous primary production can be an important energy source in forested, middle-order streams, and indicate that the manipulation of autochhynchus primary production on artificial substrata at fertilized sites is possible.

Nutrients stimulate leaf breakdown rates and detritivore biomass: bottom-up effects via heterotrophic pathways

Low quality rhododendron leaves exhibited greater changes in leaf nutrient content and macroinvertebrate response to nutrient enrichment than red maple leaves, suggesting a unique response by different leaf species to nutrients enrichment.

The response of macroinvertebrate production to a pollution gradient in a headwater stream

Summary 1. This study quantified patterns of macroinvertebrate secondary production and stored benthic organic matter along a gradient of pollution and habitat channelisation over a 3-km reach of

Responses of Stream Periphyton and Benthic Insects to Increases in Dissolved Inorganic Phosphorus in a Mesocosm

Responses of stream periphytic algae and benthic insects to increases in dissolved inorganic phosphorus (P) were assessed in a streamside mesocosm in summer by biota from the stream.

Macroinvertebrate response to salmon carcass analogue treatments: exploring the relative influence of nutrient enrichment, stream foodweb, and environmental variables

  • A. KohlerD. Taki
  • Environmental Science
    Journal of the North American Benthological Society
  • 2010
Increased autotrophic productivity and the absence of major shifts in treatment stream macroinvertebrate community composition and structure suggest that SCA is a viable nutrient-enrichment strategy.