Flow alteration-ecology relationships in Ozark Highland streams: Consequences for fish, crayfish and macroinvertebrate assemblages

We examined flowalteration-ecology relationships in benthic macroinvertebrate, fish, and crayfish assemblages in Ozark Highland streams, USA, over two years with contrasting environmental conditions, a drought year (2012) and a flood year (2013). We hypothesized that: 1) there would be temporal variation in flow alteration-ecology relationships between the two years, 2) flow alteration-ecology relationshipswould be stronger during the drought year vs the flood year, and 3) fish assemblages would show the strongest relationships with flow alteration. We used a quantitative richest-targeted habitat (RTH) method and a qualitative multihabitat (QMH) method to collect macroinvertebrates at 16 USGS gaged sites during both years. We used backpack electrofishing to sample fish and crayfish at 17 sites in 2012 and 11 sites in 2013.Weused redundancy analysis to relate biological response metrics, including richness, diversity, density, and community-based metrics, to flow alteration.We found temporal variation in flow alteration-ecology relationships for all taxa, and that relationships differed greatly between assemblages. We found relationships were stronger for macroinvertebrates during the drought year but not for other assemblages, and that fish assemblage relationships were not stronger than the invertebrate taxa. Magnitude of average flow, frequency of high flow, magnitude of high flow, and duration of high flow were the most important categories of flow alteration metrics across taxa. Alteration of high and average flows was more important than alteration of low flows. Of 32 important flow alteration metrics across years and assemblages, 19 were significantly altered relative to expected values. Ecological responses differed substantially between drought and flood years, and this is likely to be exacerbated with predicted climate change scenarios. Differences in flow alteration-ecology relationships among taxonomic groups and temporal variation in relationships illustrate that a complex suite of variables should be considered for effective conservation of stream communities related to flow alteration

Ohio Energy Generation Optimization

This honors project explores the optimization of energy generation within the state of Ohio to better the energy generation efficiency both environmentally and economically. The proposed solution is a 30-year plan from 2020 to 2050 to reduce the environmental impact caused by electricity generation in Ohio. This project shows guidelines and goals to reach by the end of every decade spanning from 2030 to 2050. This was done using an optimizing program called Multiple Objective Linear Programming (MOLP) and while not perfect it lays a foundation for changes that should come to Ohio’s energy mix in the next 30 years

Literature in the Arid Zone

This chapter surveys and assesses from an ecocentric perspective some representative literary portrayals of the Australian deserts. Generally, it contrasts works that portray the desert as an alien, hostile, and undifferentiated void with works that recognise and value the biological particularities of specific desert places. It explores the literature of three dominant cultural orientations to the deserts: pastoralism, mining, and traversal. It concludes with a consideration of several multi-voiced and/or multi-genred bioregionally informed works that suggest fruitful directions for more ecocentric literary approaches

Isolation of Nuclei from Physarum flavicomum: Demonstration of Nuclear Cyclic Acid AMP Phosphodiesterase

Cyclic AMP phosphodiesterase activity in the nucleus of the myxomycete Physarum flavicomum was demonstrated by cytochemical staining utilizing electron microscopy and by enzymatic assays with tritiated cyclic AMP as the substrate. Cytochemical staining showed Physarum\u27s plasmodial phosphodiesterase activity to be located in the nucleus, along the plasma membrane, in vesicles, and free in the cytoplasm. Nuclear phosphodiesterase, which may be cell cycle dependent, was primarily located in the nucleolus. Nuclei from three to five day old microplasmodial cultures were isolated by the method of Henney and Yee. Whole cells were collected through centrifugation and washed. Pellets were homogenized in a medium composed of 0.01 MTris-HC1 (pH 7.2 at 4 °C), 0.25 M sucrose, 0.01% Triton X-100, and 5mM CaC1₂. Nuclei were collected through double filtration and two 1.0 M sucrose density gradient centrifugations. After the nuclei were washed, microscopic examination revealed a purity of over 90%. Radioactive assays of the nuclear preparations demonstrated phosphodiesterase activity consistant with that indicated by cytochemical localization. The specific activity of the nuclear enzyme was 15 nMole of cyclic AMP hydrolyzed /min/mg. of protein

A Beginner\u27s Mind

In the beginner’s mind there are many possibilities; in the expert’s there are few. —Shunryu Suzuki Recently I moved to Las Cruces in the southern part of New Mexico. My new home lies in the Mesilla Valley of the Rio Grande, as it courses muddy through the Chihuahuan desert, North America’s largest but least celebrated arid land. The Organ Mountains rise to the east, serrating the dawn’s liminal blue. In the fi rst few weeks of my residence, I made some tentative contacts with the landscape on a series of short hikes, toting my 16-month-old boy, Riley, in a backpack. The “beginner’s mind,” the elusive skill to look without preconceptions, to perceive originally, is an ideal in Zen and in haiku poetry. Moving to a new place, especially one so different from prior experiences, can nudge one toward that ideal. Of course I’ve read about this place, even passed through a time or two, so it is not entirely new, and I am certainly burdened with preconceptions, expectations, fears; but still, I am a neophyte, greenhorn, scurfed with innocence. Yet, while haiku poetry nurtures a beginner’s mind, it also does so in a landscape that is familiar, not exotic. Traditionally, the audience for Japanese haiku knew the look, sound, and scent of each plant named, each animal mentioned, each landscape traversed, and had read hundreds, thousands of haiku on the same subject. Can the allusive form work here? The intimate haiku of plum blossoms, bush warblers, crows, and crickets—will it get lost in the vastness of basin and range, the vocabulary of bajada and playa, piñon and nopale, ocotillo and arroyo, acacia and mesquite? Can it speak in the prickly dialect of desert words, so remote from the verdant Japanese diction

Impact of the Spruce Budworm (Lepidoptera: Tortricidae) on the Ottawa and Hiawatha National Forests, 1978-1980

The Michigan Impact Plot System was established during 1978 and 1979 to obtain a data base for quantifying the impact of the spruce budworm in the Ottawa and Hiawatha National Forests. The formulae used to estimate the mean, total, and associated standard errors of the various parameters at the national forest and forest district levels are presented. We present the 1978, 1979, and 1980 impact data for the following parameters; percent mortality, total dead volume. dead volume per ha, live volume per ha, defoliation ranking, frequency and extent of top-kill, and incidence of spruce budworm feeding on saplings and regenera- tion. Statistics from an annual inventory of 108 composite ground sampling units (CGSU) in 1978, and 136 CGSU\u27s in 1979 and 1980 provide a more precise estimate ofthe impact of the spruce budworm in Michigan\u27s Upper Peninsula than ha~ been available to date