A Proposed Approach to Quantitatively Assess Potential Ecological Impacts to Terrestrial Receptors from Chemical Exposure

2009 ◽  
pp. 422-422-18
Author(s):  
GE Watkin ◽  
ME Stelljes
Keyword(s):  
Chemical Exposure ◽  
Ecological Impacts

scholarly journals Autonomous Robotics for Identification and Management of Invasive Aquatic Plant Species

2019 ◽  
Vol 9 (12) ◽  
pp. 2410 ◽  
Author(s):  
Maharshi Patel ◽  
Shaphan Jernigan ◽  
Rob Richardson ◽  
Scott Ferguson ◽  
Gregory Buckner
Keyword(s):  
Plant Species ◽  
Weed Management ◽  
Aquatic Plant ◽  
Aquatic Vegetation ◽  
Chemical Exposure ◽  
Ecological Impacts ◽  
Aquatic Weed ◽  
Vegetation Control ◽  
Invasive Aquatic Plant ◽  
Distribution Mapping

Invasive aquatic plant species can expand rapidly throughout water bodies and cause severely adverse economic and ecological impacts. While mechanical, chemical, and biological methods exist for the identification and treatment of these invasive species, they are manually intensive, inefficient, costly, and can cause collateral ecological damage. To address current deficiencies in aquatic weed management, this paper details the development of a small fleet of fully autonomous boats capable of subsurface hydroacoustic imaging (to scan aquatic vegetation), machine learning (for automated weed identification), and herbicide deployment (for vegetation control). These capabilities aim to minimize manual labor and provide more efficient, safe (reduced chemical exposure to personnel), and timely weed management. Geotagged hydroacoustic imagery of three aquatic plant varieties (Hydrilla, Cabomba, and Coontail) was collected and used to create a software pipeline for subsurface aquatic weed classification and distribution mapping. Employing deep learning, the novel software achieved a classification accuracy of 99.06% after training.

The Pharmacodynamics of Prenatal Chemical Exposure

1985 ◽  
Author(s):  
Richard K. Miller ◽  
◽  
Carol K. Kellogg
Keyword(s):  
Chemical Exposure

207. The Effect of Technical Improvements on the Chemical Exposure at a Finnish Coking Plant

1999 ◽  
Author(s):  
L. Pyy ◽  
M. Makela ◽  
E. Hakala ◽  
A. Lisko ◽  
E. Yrjanheikki ◽  
...  
Keyword(s):  
Chemical Exposure ◽  
Coking Plant

High predatory efficiency and abundance drive expected ecological impacts of a marine invasive fish

2020 ◽  
Vol 637 ◽  
pp. 195-208 ◽  
Author(s):  
EM DeRoy ◽  
R Scott ◽  
NE Hussey ◽  
HJ MacIsaac
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
Ecological Impact ◽  
Marine Species ◽  
Ecological Impacts ◽  
Negative Effects ◽  
Marine Predator ◽  
Eastern Gulf Of Mexico ◽  
Red Grouper ◽  
Per Capita

The ecological impacts of invasive species are highly variable and mediated by many factors, including both habitat and population abundance. Lionfish Pterois volitans are an invasive marine species which have high reported detrimental effects on prey populations, but whose effects relative to native predators are currently unknown for the recently colonized eastern Gulf of Mexico. We used functional response (FR) methodology to assess the ecological impact of lionfish relative to 2 functionally similar native species (red grouper Epinephelus morio and graysby grouper Cephalopholis cruentata) foraging in a heterogeneous environment. We then combined the per capita impact of each species with their field abundance to obtain a Relative Impact Potential (RIP). RIP assesses the broader ecological impact of invasive relative to native predators, the magnitude of which predicts community-level negative effects of invasive species. Lionfish FR and overall consumption rate was intermediate to that of red grouper (higher) and graysby grouper (lower). However, lionfish had the highest capture efficiency of all species, which was invariant of habitat. Much higher field abundance of lionfish resulted in high RIPs relative to both grouper species, demonstrating that the ecological impact of lionfish in this region will be driven mainly by high abundance and high predator efficiency rather than per capita effect. Our comparative study is the first empirical assessment of lionfish per capita impact and RIP in this region and is one of few such studies to quantify the FR of a marine predator.

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