EcoAnalysts Inc.

Moscow, ID, United States

EcoAnalysts Inc.

Moscow, ID, United States

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Christopher Rogers D.,University of Kansas | Christopher Rogers D.,University of New England of Australia | Hill M.A.,EcoAnalysts Inc.
Zootaxa | Year: 2013

We present a checklist of the large branchiopod crustaceans of Idaho, Oregon and Washington, USA. New distributional records are presented for most species, including the first records of Branchinecta constricta Rogers, 2006 and Lepidurus cryptus Rogers, 2001 from Idaho, the first record of B. oriena Belk and Rogers 2002 from Oregon, the first record of B. mackini Dexter, 1956 and Artemia franciscana Kellogg, 1906 co-occurring, and the first record of L. cryptus from Washington. Furthermore, we present the first record of Eulimnadia diversa Mattox, 1937 from west of the continental divide, which we interpret as an accidental introduction. In 1959, Lynch collected a new fairy shrimp species from Washington, deposited that material in the US National Museum, labeled "muddy fairy shrimp, Branchinecta lutulenta", but never described it. Numerous efforts have been made to rediscover extant populations since 1999. We rediscovered this species in 2011, from two small pools from the vicinity of Lynch's original collection site, which appears to have been destroyed. Branchinecta lutulenta sp. nov. is most closely related to B. lindahli Packard, 1883 and B. oterosanvicentei Obregón-Barboza et al., 2002. Branchinecta lutulenta sp. nov. is readily separable from all other Branchinecta species by the form of the male second antennal distal antennomere and the ornamentation of the female dorsum. Copyright © 2013 Magnolia Press.


Minshall G.W.,Idaho State University | Shafii B.,University of Idaho | Price W.J.,University of Idaho | Holderman C.,Kootenai Tribe of Idaho | And 3 more authors.
Freshwater Science | Year: 2014

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 principal causative agent and prompted an on-going experimental nutrient-addition program for the Kootenai River downstream from Libby Dam, with dosing at the Idaho-Montana border. Pre-treatment monitoring began in 2003 and liquid ammonium polyphosphate fertilizer (10-34-0) was added each year during the growing season from 2006 through 2010 with a target TDP concentration of 3 μg/L and TN:TP near 20:1. We studied benthic macroinvertebrate responses to the experimental addition and hypothesized moderate increases in invertebrate richness, abundance, and biomass with little change in assemblage structure. We used a before-after control-impact BACI design with macroinvertebrate samples collected pre-and post-treatment from July to early November 2003-2010 from fertilized and unfertilized reaches. After treatment, mean modified (Oligochaeta and Chironomidae subtaxa excluded) total abundance increased 72%, mean total abundance increased 69%, and mean biomass increased 48%. Abundance of Ephemeroptera, the principal insect order in the study area increased 66%. Filter-feeder abundance also increased, indicating increased suspended organic matter in addition to the attached forms consumed by other benthic macroinvertebrates. The first 5 y of experimental treatment resulted in increased food resources for resident native fishes with no major alteration of macroinvertebrate community structure or trophic pathways. © 2014 by The Society for Freshwater Science.


Hill M.A.,EcoAnalysts Inc. | Pfeiffer J.,EcoAnalysts Inc. | Jacobus L.M.,Indiana University Bloomington
Zootaxa | Year: 2010

Waynokiops dentatogriphus, new genus and new species (Ephemeroptera: Baetidae), is described from nymphs collected from seven lakes and reservoirs in the eastern United States of America, specifically from the states of Virginia, Kentucky, Ohio, Indiana and Arkansas (type locale), during sampling for the USEPA National Lakes Assessment. The lateral abdominal expansions and the dorsal abdominal armature of the new genus are unique among Cloeon complex genera. Abdominal tergal projections are unusual for a small minnow mayfly from lentic habitats. Copyright © 2010 Magnolia Press.


Drumm D.T.,EcoAnalysts Inc. | Bird G.J.,Independent
Zootaxa | Year: 2016

One new genus is erected and four new species of paratanaoidean tanaidaceans are described from deep waters in the northeastern Gulf of Mexico: one in each of the genera Collettea, Tanaella, and Pseudomacrinella, and one as a new genus in the family Anarthruridae. Keys to species in the genera Collettea, Tanaella, and the genera of the Anarthruridae are provided. Copyright © 2016 Magnolia Press.


PubMed | EcoAnalysts Inc. and Independent
Type: Journal Article | Journal: Zootaxa | Year: 2016

One new genus is erected and four new species of paratanaoidean tanaidaceans are described from deep waters in the northeastern Gulf of Mexico: one in each of the genera Collettea, Tanaella, and Pseudomacrinella, and one as a new genus in the family Anarthruridae. Keys to species in the genera Collettea, Tanaella, and the genera of the Anarthruridae are provided.


Carling G.T.,University of Utah | Carling G.T.,Brigham Young University | Richards D.C.,EcoAnalysts Inc. | Hoven H.,The Institute for Watershed science | And 5 more authors.
Science of the Total Environment | Year: 2013

We collected surface water, pore water, and sediment samples at five impounded wetlands adjacent to Great Salt Lake, Utah, during 2010 and 2011 in order to characterize pond chemistry and to compare chemistry with plant community health metrics. We also collected pore water and sediment samples along multiple transects at two sheet flow wetlands during 2011 to investigate a potential link between wetland chemistry and encroachment of invasive emergent plant species. Samples were analyzed for a suite of trace and major elements, nutrients, and relevant field parameters. The extensive sampling campaign provides a broad assessment of Great Salt Lake wetlands, including a range of conditions from reference to highly degraded. We used nonmetric multidimensional scaling (NMS) to characterize the wetland sites based on the multiple parameters measured in surface water, pore water, and sediment. NMS results showed that the impounded wetlands fall along a gradient of high salinity/low trace element concentrations to low salinity/high trace element concentrations, whereas the sheet flow wetlands have both elevated salinity and high trace element concentrations, reflecting either different sources of element loading or different biogeochemical/hydrological processes operating within the wetlands. Other geochemical distinctions were found among the wetlands, including Fe-reducing conditions at two sites and sulfate-reducing conditions at the remaining sites. Plant community health metrics in the impounded wetlands showed negative correlations with specific metal concentrations in sediment (THg, Cu, Zn, Cd, Sb, Pb, Ag, Tl), and negative correlations with nutrient concentrations in surface water (nitrite, phosphate, nitrate). In the sheet flow wetlands, invasive plant species were inversely correlated with pore water salinity. These results indicate that sediment and pore water chemistry play an important role in wetland plant community health, and that monitoring and remediation efforts should consider pore water and sediment chemistry in addition to surface water chemistry. © 2012 Elsevier B.V.


Magalhaes W.F.,University of Hawaii at Manoa | Bailey-Brock J.H.,University of Hawaii at Manoa | Barrett B.M.,University of Hawaii at Manoa | Barrett B.M.,EcoAnalysts Inc.
Zootaxa | Year: 2011

A new species of Sphaerephesia is described from Mamala Bay, south shore of Oahu, Hawaii. Sphaerephesia mamalaensis sp. nov., differs from its congeners by the absence of microtubercles and number and arrangement of body and parapodial papillae. This species is commonly found in low abundance in shallow (20 m) and deep-waters (500 m) adjacent to ocean outfall diffusers or dredge dump sites and has been resilient to the waste water treatment plume of the outfalls for the last 25 years. A comparative table with morphological characteristics of all seven recognized species of Sphaerephesia is provided. Copyright © 2011 - Magnolia Press.


Drumm D.T.,EcoAnalysts Inc. | Rohan S.,University of Washington
Marine Biodiversity Records | Year: 2016

Background: The blunt bladed shrimp Spirontocaris truncata inhabits sponges and is typically found on subtidal rocky reefs, and is distributed from the Strait of Georgia, British Columbia to Baja California, Mexico at depths of 37 to 92 m. Results: This paper presents a new record of this species obtained from stomach contents of the Pacific cod, Gadus macrocephalus, from the northern Gulf of Alaska, which extends its distribution range over 1800 km. This is the first record of the species in Alaska. Conclusions: A large northward range extension was documented for the shrimp Spirontocaris truncata. A clear understanding of the distribution of marine species is a necessary prerequisite for effective monitoring and predictions about future changes to marine ecosystems. © 2016 The Author(s).


Rogers D.C.,EcoAnalysts Inc. | Weeks S.C.,University of Akron | Hoeh W.R.,Kent State University
Zootaxa | Year: 2010

Eulimnadia graniticola n. sp. from Stone Mountain, Georgia, and the Florida Keys, USA, is defined primarily on molecular characters and egg morphology. Ecological, reproductive and life history data are provided. This species is the second species of branchiopod crustacean reported from Stone Mountain more closely related to the South American fauna than to its North American congeners. Copyright © 2010 Magnolia Press.


Mangan B.P.,King's College | Bilger M.D.,EcoAnalysts Inc.
American Midland Naturalist | Year: 2012

Multiple specimens of the rusty crayfish (Orconectes rusticus) collected from the Susquehanna River in Pennsylvania exhibited Rheotanytarsus sp. (Diptera: Chironomidae) living on their carapaces and chelipeds. Although chironomid larvae have been reported as living on many aquatic organisms, this is the first record of chironomids living phoretically on crayfish. © 2012, American Midland Naturalist.

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