Výsledky vyhledávání - "David A. Kovacic"

Nitrogen and phosphorus removal using tile‐treatment wetlands: A 12‐year study from the midwestern United States

Autor: A. Maria Lemke, Krista G. Kirkham, Michael P. Wallace, Christine M. VanZomeren, Jacob F. Berkowitz, David A. Kovacic

Publikováno v: Journal of Environmental Quality. 51:797-810

Nutrient enrichment from tile-drained agricultural lands to the Mississippi River is a leading cause of hypoxia in the Gulf of Mexico. Small edge-of-field wetlands can effectively treat nitrate-nitrogen (NO

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0116272d75c2dc25d7fc21ce84ea359
https://doi.org/10.1002/jeq2.20316

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Species richness, equitability, and abundance of ants in disturbed landscapes

Autor: John H. Graham, John C. Zak, Michael P. Wallace, John M. Emlen, Jonathan P. Nutter, Jeffrey J. Duda, Catherine Chamberlin-Graham, Hal E. Balbach, David A. Kovacic, Anthony J. Krzysik, D. Carl Freeman, W. Russell Long

Publikováno v: Ecological Indicators. 9:866-877

Ants are used as indicators of environmental change in disturbed landscapes, often without adequate understanding of their response to disturbance. Ant communities in the southeastern United States displayed a hump-backed species richness curve again

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::994109eb6581e2e940d86f32bf25b988
https://doi.org/10.1016/j.ecolind.2008.10.003

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Ant Community Composition Across a Gradient of Disturbed Military Landscapes at Fort Benning, Georgia

Autor: John C. Zak, John M. Emlen, Jonathan P. Nutter, Hal E. Balbach, Catherine Chamberlin-Graham, David A. Kovacic, Anthony J. Krzysik, W. Russell Long, Jeffrey J. Duda, John H. Graham, D. Carl Freeman, Michael P. Wallace

Publikováno v: Southeastern Naturalist. 7:429-448

Military training, soil texture, and ground cover influence ant communities at Fort Benning, a military installation in west-central Georgia. We sampled 81,237 ground-dwelling ants (47 species in 20 genera) with pitfall traps at 40 sites on a continu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7d474222b9ed441d5c9951a726bd9d14
https://doi.org/10.1656/1528-7092-7.3.429

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Use of created wetlands to improve water quality in the Midwest—Lake Bloomington case study

Autor: Richard M. Twait, Michael P. Wallace, Juliane M. Bowling, David A. Kovacic

Publikováno v: Ecological Engineering. 28:258-270

Agricultural watersheds of the Midwest typically export nitrogen (N) and phosphorus (P) to surface waters causing contamination of drinking water reservoirs and, ultimately, hypoxia in the Gulf of Mexico. Two agricultural runoff wetlands, W1 (area 0.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f77e585db0b4147a9ded0562795c2f10
https://doi.org/10.1016/j.ecoleng.2006.08.002

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Leaf fluctuating asymmetry, soil disturbance and plant stress: a multiple year comparison using two herbs, Ipomoea pandurata and Cnidoscolus stimulosus

Autor: John C. Zak, David A. Kovacic, Michelle L. Brown, John H. Graraham, Anthony J. Krzysik, John M. Emlen, D. Carl Freeman, Jeffrey J. Duda, Harold Balbach

Publikováno v: Ecological Indicators. 5:85-95

We studied Cnidoscolus stimulosus and Ipomoea pandurata , two common herbs of the Fall Line Sandhills to assess their potential as ecosystem level stress indicators. We focused on plants because they are among the most persistent organisms in terrest

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e9744027de8458fd896e1d538cdadbaf
https://doi.org/10.1016/j.ecolind.2004.05.002

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Photosynthesis and Fluctuating Asymmetry as Indicators of Plant Response to Soil Disturbance in the Fall‐Line Sandhills of Georgia: A Case Study Using Rhus copallinum and Ipomoea pandurata

Autor: Jeffrey J. Duda, John C. Zak, David A. Kovacic, Harold Balbach, Michelle L. Brown, John M. Emlen, John H. Graham, Anthony J. Krzysik, D. Carl Freeman

Publikováno v: International Journal of Plant Sciences. 165:805-816

We examined net photosynthesis, transpiration, stomatal conductance, and leaf fluctuating asymmetry on two species (Rhus copallinum and Ipomoea pandurata) as indicators of stress at nine sites across a gradient of soil disturbance at Fort Benning, Ge

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ef774b4cc9c856afa50e2cb874b63080
https://doi.org/10.1086/421478

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Estimating disturbance effects from military training using developmental instability and physiological measures of plant stress

Autor: John C. Zak, David A. Kovacic, Michelle L. Brown, John M. Emlen, Anthony J. Krzysik, Jeffrey J. Duda, D.C. Freeman, John H. Graham

Publikováno v: Ecological Indicators. 3:251-262

We used developmental instability, water potential, and variable fluorescence to determine if populations of winged sumac (Rhus copallinum) were being negatively effected by military training disturbance. We established nine sites that represented a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::48a9722bf1fcce30004cb8dd20983d3e
https://doi.org/10.1016/j.ecolind.2003.11.003

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Plant Nutrient Uptake and Biomass Accumulation in a Constructed Wetland

Autor: David A. Kovacic, Mark B. David, Curtis R. Hoagland, Lowell E. Gentry

Publikováno v: Journal of Freshwater Ecology. 16:527-540

We examined the role of plants in the nutrient cycle of a 0.3 ha constructed wetland that received tile drainage water from agricultural fields. The objectives were to determine: 1) above- and below-ground production of wetland macrophytes; 2) produc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d986898073e3e6cf3aefb7f14f3d0bab
https://doi.org/10.1080/02705060.2001.9663844

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