Item talk:Q227174

{

 "@context": "http://schema.org/",
 "@type": "WebPage",
 "additionalType": "Research",
 "url": "https://www.usgs.gov/centers/alaska-science-center/science/tracing-mercury-through-lake-food-webs",
 "headline": "Tracing Mercury Through Lake Food Webs",
 "datePublished": "December 8, 2022",
 "author": [
   {
     "@type": "Person",
     "name": "Sarah Laske, Ph.D.",
     "url": "https://www.usgs.gov/staff-profiles/sarah-laske",
     "identifier": {
       "@type": "PropertyValue",
       "propertyID": "orcid",
       "value": "0000-0002-6096-0420"
     }
   },
   {
     "@type": "Person",
     "name": "Michael P Carey, Ph.D.",
     "url": "https://www.usgs.gov/staff-profiles/michael-p-carey",
     "identifier": {
       "@type": "PropertyValue",
       "propertyID": "orcid",
       "value": "0000-0002-3327-8995"
     }
   },
   {
     "@type": "Person",
     "name": "Vanessa von Biela, Ph.D.",
     "url": "https://www.usgs.gov/staff-profiles/vanessa-von-biela",
     "identifier": {
       "@type": "PropertyValue",
       "propertyID": "orcid",
       "value": "0000-0002-7139-5981"
     }
   },
   {
     "@type": "Person",
     "name": "Ashley Stanek",
     "url": "https://www.usgs.gov/staff-profiles/ashley-stanek",
     "identifier": {
       "@type": "PropertyValue",
       "propertyID": "orcid",
       "value": "0000-0001-5184-2126"
     }
   }
 ],
 "description": [
   {
     "@type": "TextObject",
     "text": "Learn more about a sampling effort conducted with the U.S. Geological Survey and National Park Service in Lake Clark, Wrangell-St. Elias, and Gates of the Arctic national parks and preserves and Noatak National Preserve. National Park Article:  Tracing Mercury through Lake Food Webs"
   },
   {
     "@type": "TextObject",
     "text": "Mercury (Hg) is a toxic contaminant that threatens the health of aquatic ecosystems and species by affecting neurological, cardiovascular, endocrine, renal, and reproductive function. Particularly concerning, Hg accumulates over time in fish tissue, generally increasing with size and age, especially in long-lived piscivorous species like lake trout (Salvelinus namaycush). When contaminant levels reach specific thresholds (e.g., Environmental Protection Agency [EPA] benchmarks for health and toxicity), fish consumption can be harmful to people and wildlife, and safety advisories can be issued for lakes or species. Hg concentrations measured in resident lake fish at several of Alaska\u2019s National Parks were among the highest measured in the western United States, exceeding both ecological (>90 ng/g wet weight) and human health benchmarks (>300 ng/g wet weight). Yet fish Hg concentrations varied widely across and within park lakes and among individuals in the same lake. Because diet is the main Hg accumulation pathway in fish, we aim to investigate the dietary pathways and Hg bioaccumulation from prey to predator."
   },
   {
     "@type": "TextObject",
     "text": "The movement of Hg through lake food webs is related to within-lake biological processes like Hg methylation rate, biogeochemical characteristics, and energy transfer between trophic levels. By sampling a top predator (lake trout), associated prey species, and primary producers we can trace Hg through lake food webs and determine whether specific energy pathways promote bioaccumulation. In sampling across several National Parks, information will be gathered on limnological, morphological, and biogeochemical characteristics of a diverse set of lakes, providing a baseline of information to study Hg pathways in additional parks, in food webs with different species, or in the future."
   },
   {
     "@type": "TextObject",
     "text": "Mercury concentrations in fish likely reflect different energy sources in lake food webs. Species, populations, or individuals may contain higher and variable concentrations of mercury, which may relate directly to prey mercury content, diets of fish, and fish foraging strategies."
   },
   {
     "@type": "TextObject",
     "text": "Return to Ecosystems >> Fish and Aquatic Ecology"
   }
 ],
 "funder": {
   "@type": "Organization",
   "name": "Alaska Science Center",
   "url": "https://www.usgs.gov/centers/alaska-science-center"
 },
 "about": [
   {
     "@type": "Thing",
     "name": "Science Technology"
   },
   {
     "@type": "Thing",
     "name": "lake food webs"
   },
   {
     "@type": "Thing",
     "name": "Biology"
   },
   {
     "@type": "Thing",
     "name": "Information Systems"
   },
   {
     "@type": "Thing",
     "name": "Geology"
   },
   {
     "@type": "Thing",
     "name": "food webs"
   },
   {
     "@type": "Thing",
     "name": "Alaska"
   },
   {
     "@type": "Thing",
     "name": "Ecosystems"
   },
   {
     "@type": "Thing",
     "name": "Environmental Health"
   },
   {
     "@type": "Thing",
     "name": "lake trout"
   },
   {
     "@type": "Thing",
     "name": "Mercury"
   },
   {
     "@type": "Thing",
     "name": "Water"
   },
   {
     "@type": "Thing",
     "name": "Methods and Analysis"
   },
   {
     "@type": "Thing",
     "name": "tracing mercury"
   },
   {
     "@type": "Thing",
     "name": "Energy"
   }
 ]

}