IAN is committed to producing practical, user-centered communications that foster a better understanding of science and enable readers to pursue new opportunities in research, education, and environmental problem-solving. Our publications synthesize scientific findings using effective science communication techniques.

Altered ecological flows blur boundaries in urbanizing watersheds (Page 1)

Altered ecological flows blur boundaries in urbanizing watersheds

Lookingbill TR, Kaushal SS, Elmore AJ, Gardner R, Eshleman KN, Hilderbrand RH, Morgan RP, Boynton WR, Palmer MA, and Dennison WC ·
2009

The relevance of the boundary concept to ecological processes has been recently questioned. Humans in the post-industrial era have created novel lateral transport fluxes that have not been sufficiently considered in watershed studies. We describe patterns of land-use change within the Potomac River basin and demonstrate how these changes have blurred traditional ecosystem boundaries by increasing the movement of people, materials, and energy into and within the basin.

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Development and evaluation of a spatially-explicit index of Chesapeake Bay health (Page 1)

Development and evaluation of a spatially-explicit index of Chesapeake Bay health

Williams MR, Longstaff BJ, Buchanan C, Llanso R, Dennison WC ·
2009

In an effort to better portray changing health conditions in Chesapeake Bay and support restoration efforts, a Bay Health Index (BHI) was developed to assess the ecological effects of nutrient and sediment loading on 15 regions of the estuary. Three water quality and three biological measures were combined to formulate the BHI.

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Global patterns of foliar nitrogen isotopes and their relationships with climate, mycorrhizal fungi, foliar nutrient concentrations, and nitrogen availability

Craine JM, Elmore AJ, Aidar MPM, Bustamante M, Dawson TE, Hobbie EA, Kahmen A, Mack MC, McLauchlan KK, Michelsen A, Nardoto GB, Pardo LH, Penuelas J, Reich PB, Schuur EAG, Stock WD, Templer PH, Virginia RA, Welker JM, and Wright IJ ·
2009

Ratios of nitrogen (N) isotopes in leaves could elucidate underlying patterns of N cycling across ecological gradients. To better understand global-scale patterns of N cycling, we compiled data on foliar N isotope ratios (delta N-15), foliar N concentrations, mycorrhizal type and climate for over 11 000 plants worldwide.

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Multiple-pattern parameter identification and uncertainty analysis approach for water quality modeling (Page 1)

Multiple-pattern parameter identification and uncertainty analysis approach for water quality modeling

Zou R, Lung WS, and Wu J ·
2009

This paper presents a multiple-pattern parameter identification and uncertainty analysis approach for robust water quality modeling using a neural network (NN) embedded genetic algorithm (GA). The modeling approach uses an adaptive NN-GA framework to inversely solve the governing equations in a water quality model for multiple parameter patterns. along with an alternating fitness method to maintain solution diversity.

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Seagrasses: biology, ecology and conservation (Page 1)

Seagrasses: biology, ecology and conservation

Dennison WC ·
2009

Seagrasses: biology, ecology and conservation, edited by Tony Larkum, Bob Orth and Carlos Duarte, and authored by 79 active seagrass researchers is the most comprehensive book about these unique flowering plants ever written. It is long, 691 pp, with an excess of 100 pages devoted to references, and it includes 26 chapters on evolution, anatomy, biology, physiology, biogeochemistry, remote sensing, grazing and predation, ecology, and management.

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The occurrence of antibiotics in an urban watershed: From wastewater to drinking water

Watkinson AJ, Murby EJ, Kolpin DW, and Costanzo SD ·
2009

The presence of 28 antibiotics in three hospital effluents, five wastewater treatment plants (WWTPs), six rivers and a drinking water storage catchment were investigated within watersheds of South-East Queensland, Australia. All antibiotics were detected at least once, with the exception of the polypeptide bacitracin which was not detected at all. Antibiotics were found in hospital effluent ranging from 0.01-14.5 [mu]g L(-1), dominated by the beta-lactam, quinolone and sulphonamide groups.

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A descriptive analysis of temporal and spatial patterns of variability in Puget Sound oceanographic properties

Moore SK, Mantua NJ, Newton JA, Kawase M, Warner MJ, and Kellogg JP ·
2008

Temporal and spatial patterns of variability in Puget Sound's oceanographic properties are determined using continuous vertical profile data from two long-term monitoring programs; monthly observations at 16 stations from 1993 to 2002, and biannual observations at 40 stations from 1998 to 2003. Climatological monthly means of temperature, salinity, and density reveal strong seasonal patterns.

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Disappearing headwaters: patterns of stream burial due to urbanization

Elmore AJ and Kaushal SS ·
2008

Headwater streams provide important ecosystem services, including clean drinking water, habitat for aquatic life, and rapid processing and uptake of nutrients, which can reduce delivery of nitrogen and phosphorus to downstream coastal waters. Despite their importance to ecosystem functioning, very little research has addressed the extent to which headwater streams are buried beneath the land surface during urbanization.

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Effects of nutrient enrichment in the nation's estuaries: A decade of change

Bricker SB, Longstaff BJ, Dennison WC, Jones AB, Boicourt KE, Wicks EC, and Woerner J ·
2008

An updated assessment of nutrient related impacts in US estuaries was completed in 2007. This assessment evaluates three components for each estuary: the influencing factors (e.g. land use, nutrient loads), the overall eutrophic condition (e.g. chlorophyll a, presence of nuisance/toxic algae and macroalgae, extent of dissolved oxygen problems, loss of submerged aquatic vegetation), and future outlook.

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Environmental problem solving in coastal ecosystems: A paradigm shift to sustainability (Page 1)

Environmental problem solving in coastal ecosystems: A paradigm shift to sustainability

Dennison WC ·
2008

The human ecological footprint now extends to the entire globe, and human impacts are the dominant feature of many ecosystems, resulting in our current era being coined the 'anthropocene'. This is particularly apparent in coastal ecosystems as human populations are increasing rapidly in coastal cities and the ecosystem services in these areas are rapidly being compromised.

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