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    Poster Pub

    Monday, August 7, 8:00-11:30 am
    Symposium 1 - Beyond labeling: comparing the sustainability of certified alternative farming systems

    Agriculture in developed countries has become increasingly dependent on synthetic fertilizers and pesticides. Although successful in terms of yield, this approach to farming has been criticized as environmentally, socially, and economically unsustainable. At the same time, financial, regulatory, and biological pressures have intensified. Recently there has been an upsurge in alternatives agroecosystems such as organic, fair trade, and shade-grown. While these alternatives represent a small proportion of the agricultural landscape, they are upstarts that challenge the icon of conventional agriculture and have been proposed as sustainable ways to increase farm profitability while reducing environmental and human risks. To what extent are these alternative agroecosystems more sustainable than conventional agriculture? For example, successful completion of the 3-yr organic certification provides access to premium markets but does not ensure economic and environmental sustainability. Sound science can help us achieve the goal of meeting growing food and fiber demands while promoting environmental integrity, social justice, and economic fairness. This symposium brings together a diverse group of scientists who work on a variety of research questions across different agroecosystems. Speakers will address a wide range of topics at different spatial and temporal scales including nutrient uptake, pest ecology, soil conservation, biodiversity, and sociology. Agroecosystems will be analyzed across a variety of regions, including the U.S. Midwest and Northern Great Plains, tropical systems in Mexico and Brazil, and temperate grasslands of Argentina. A panel discussion and inputs from the audience will generate discussion related to the optimization and prioritization of continued research efforts with the goal of increasing the sustainability of all food and fiber production systems.

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    AV Training for Student Projectionists 3

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    VIP Leadership Lounge

    Tuesday, August 8, 6:30-8:00 pm
    ESA Soil Ecology and Physiological Ecology Mixer
    L-12, Lobby Level, Cook Convention Center

    Poster Session 26
    Poster Session 27
    Poster Session 28
    Poster Session 29
    Poster Session 30
    Poster Session 31
    Poster Session 32
    Poster Session 33
    Wednesday, August 9, 11:30 am-1:15 pm
    ESA Rapid Response Lunch

    Poster Session 34
    Wednesday, August 9, 6:30-8:00 pm
    ESA Applied Ecology, Long-Term Studies, and Rangeland Ecology and Management Sections Mixer
    Nashville, Marriott

    Monday, August 7, 8:00-11:30 am
    Symposium 3 - Revisiting the crossroads of ecology and agriculture: a tribute to Ben Stinner

    Organized by: PJ Bohlen (pbohlen@archbold-station.org), L Drinkwater, and R Lowrance

    Agriculture is the cornerstone of humanity’s relationship with nature, yet the ecological and agricultural sciences have progressed separately for many decades. Reasons for this disconnection are complex. Rapid industrialization of agricultural systems since the 1940’s has minimized or masked the role of ecological processes. During this period, ecologists focused almost exclusively on understanding natural unmanaged ecosystems. Now, shifting paradigms in ecology and agriculture are leading to a new convergence of ideas in these interrelated fields. Understanding ecological processes in human-dominated systems is a thriving area of research. At the same time, agriculturalists are recognizing the imperative of fitting agriculture into a wider environmental context. Agricultural sustainability, which is a prerequisite for a broader transition toward sustainability in human societies, will require the development and application of new approaches. This symposium will contribute to a new synthesis of basic principles of agroecosystem ecology and will highlight efforts to integrate the ecological, social and economic aspects of agricultural systems. It will bridge generations by bringing together elder icons and younger upstarts from various fields who have worked to bridge the gap between ecology and agriculture. The symposium is also a tribute to Ben Stinner, one of the pioneers of agroecosystem ecology, who died in a tragic auto accident in 2004, just as his life’s work was reaching a new level of synthesis. Some speakers will emphasize novel approaches that seek to understand coupled human and biophysical factors in agroecosystems, and to apply that understanding through collaboration of ecologists with social scientists and practitioners. Others will stress fundamental mechanisms unique to agroecosystems. The majority of the presentations will focus on temperate and subtropical agroecosystems in developed countries, but the concepts presented have global relevance.

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    Student Lounge

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    Infant and Toddler Care

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    Youth Summer Camp

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    Equipment Sign out - Sign in / Speaker Ready Room Sign Up

    Wednesday, August 9, 6:30-8:00 pm
    Aldo Leopold Leadership Program Mixer
    St. Louis, Marriott

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    Press Office

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    Internet Cafe

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    Speaker Ready Rooms

A twelve-year analysis of the response of the threatened terrestrial orchid Ute ladies'-tresses (Spiranthes diluvialis) to environmental parameters, and to management changes of river hydrology in the Diamond Fork Canyon ecosystem, Utah.

Black, Rick*,1, Gruwell, Kris1, 1 HDR Engineering, Inc., Salt Lake City, Utah, USA

ABSTRACT- Since the turn of the century, water from Strawberry Reservoir has been conveyed into Diamond Fork River, in Diamond Fork Canyon, Utah, augmenting the natural flow (less than 60 cfs) with irrigation water demands in excess of 450 cfs. In 1992, individuals of the species of the threatened terrestrial orchid Ute ladies'-tresses' (Spiranthes diluvialis) was found in the riparian ecosystem associated with the Diamond Fork River. With the exception of 1995 and 1996, this system has been surveyed for the presence of this orchid every year since 1992. During this twelve-year period, the number of occupied surfaces has varied greatly; from a minimum of 7 to a maximum of 79, and the number of flowering individuals has also varied from 303 to a maximum of 26,344 in 2001. The variation in number of flowering individuals within any one location and between locations has fluctuated greatly throughout the sampling period. In 2004, the water from Strawberry Reservoir needed for irrigation was removed from the Diamond Fork River to a pipeline, returning the system to a more natural baseline flow of approximately 60-80 cfs. As part of environmental commitments agreed upon in an Environmental Impact Statement addressing the proposed changes in flows, Ute ladies'-tresses in this ecosystem have been monitored for twelve years. This study looks at potential environmental factors that could influence the natural variation observed in the number of flowering Ute ladies'-tresses individuals within the system and the potential for interaction of river flow changes on these populations. Management parameters that could potentially impact the species include river hydrology and vegetation competition management. Global environmental parameters do not seem to explain a significant amount of variation within the system.

Key words: Desert riparian, ecosystem analysis, Spiranthes diluvialis

All materials copyright The Ecological Society of America (ESA), and may not be used without written permission.