NDLI: Zinc Toxicity Thresholds for Reclamation Forb Species

Content Provider	Springer Nature Link
Author	Paschke, Mark W. Perry, Laura G. Redente, Edward F.
Copyright Year	2006
Abstract	Zinc toxicity thresholds for reclamation plants are largely unknown. As a result, ecological risk assessments often rely on toxicity thresholds for agronomic species, which may differ from those of restoration species. Our objective was to provide Zn toxicity thresholds for forb species that are commonly used in reclamation activities. We used a greenhouse screening study where seedlings of yarrow (Achillea millefolium L.), Bigelow's tansyaster (Machaeranthera bigelovii (Gray) Greene var. bigelovii), blue flax (Linum perenne L. var. Appar), alfalfa (Medicago sativa L. var. Ladak), Palmer's penstemon (Penstemon palmeri Gray), and Rocky Mountain penstemon (Penstemon strictus Benth. var. Bandera) were grown in sand culture and exposed to increasing concentrations of Zn. Lethal concentrations (LC50 – substrate Zn concentration resulting in 50% mortality), effective concentrations (EC50 – substrate Zn concentration resulting in 50% biomass reduction), and phytotoxicity thresholds (PT50 – tissue Zn concentration resulting in 50% biomass reduction) were then determined. Phytotoxicity thresholds and effective concentrations for these reclamation species were relatively consistent between species. Our estimates of PT50-shoot for these species range from 1258 to 3214 mg Zn kg$^{−1}$ . Measures of EC50-plant for these restoration forbs ranged from 82 to 214 mg Zn L$^{−1}$ . These thresholds might be more useful for risk assessors working on reclamation sites than those based on non-reclamation species that are widely used.
Starting Page	317
Ending Page	330
Page Count	14
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	170
Issue Number	1-4
e-ISSN	15732932
Language	English
Publisher	Springer Netherlands
Publisher Date	2006-02-22
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	phytotoxicity zinc pollution restoration risk assessment Hydrogeology Terrestrial Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Atmospheric Protection/Air Quality Control/Air Pollution Environment
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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