Secondary production and seasonal development of epiphytic Enallagma civile Hagen, 1861 (Odonata: Coenagrionidae) in a newly constructed urban wetland floodway ecosystem |
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Authors: | Aaron N. Schad James H. Kennedy Gary O. Dick |
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Affiliation: | 1. Institute of Applied Science, University of North Texas, Denton, TX, USA;2. US Army Corps of Engineer Research and Development Center, Lewisville Aquatic Ecosystem Research Facility, Lewisville, TX, USA;3. Department of Biological Sciences, Institute of Applied Science, University of North Texas, Denton, TX, USA;4. US Army Corps of Engineer Research and Development Center, Lewisville Aquatic Ecosystem Research Facility, Lewisville, TX, USA |
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Abstract: | Secondary production and seasonal development of the damselfly Enallagma civile Hagen, 1861 Hagen, H. (1861), Synopsis of the Neuroptera of North America, Washington, DC: Smithsonian Institution Miscellaneous Collection.[Crossref] , [Google Scholar] were determined as part of an epiphytic macroinvertebrate study in the Dallas Floodway Extension Trinity River Project Lower Chain of Wetlands, Dallas, TX, USA. These wetlands were constructed to mitigate flooding of the Trinity River, but also provided quality wildlife habitat and removal of wastewater effluent contaminants. Variations in life history were observed between two macrophytes and three different wetlands of varying age, effluent source, and vegetation establishment. Mean annual production of E. civile was 1393 mg/m2/year, standing stock biomass was 1376 mg/m2/year, cohort production/biomass (P/B) ratio was 4.30/year, and annual P/B was 10.18/year. These values are in the upper range of known Odonata production values from a lentic system. Enallagma civile biomass growth rates were observed to be higher from populations on the better established macrophyte (Potamogeton nodosus Poiret, 1816) and in the longest established wetland. |
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Keywords: | Odonata Enallagma civile epiphytic macroinvertebrates Potamogeton nodosus Heteranthera dubia secondary production constructed wetlands North America |
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