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Found 631 dataset(s) matching "visual estimate".
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Beschta and Ripple (2012) assert that increased elk populations in the Olympic National Park due to extirpation of wolves in the 1920’s has led to a reduction in riparian vegetation. They...
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Marine Applied Research and Exploration (MARE) preformed quantitative baseline surveys within the NCSR in 2014 and 2015 with the overall goal to describe the condition of three distinctive...
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This data package includes the source imagery of a benthic cover analysis for surveys performed in 2020 by the NOAA Ecosystem Sciences Division (ESD) in Vatia, American Samoa. The imagery...
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The data described here result from benthic coral demographic surveys within belt transects of specified length and width for two life stages (juveniles and adults) in Fagaʻalu, American Samoa in...
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Jurisdictional managers have expressed concerns that nutrients from the village of Vatia, Tutuila, American Samoa, are having an adverse effect on the adjacent coral reef ecosystem. Excess...
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This dataset, created in support of USGS Scientific Investigations Report 2020-5075, Estimates of Groundwater Discharge by Evapotranspiration, Stump Spring and Hiko Springs, Clark County, Nevada,...
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This study estimated the abundance of microplastics (i.e., plastics measuring less than 5mm) on marine turtle nesting beaches during 2018-08-04 to 2020-01-24. Samples were collected with metallic...
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A biologist and field crew from Northern Prairie Wildlife Research Center visited sites nine times throughout the breeding season (late May to mid-July) to record counts of grassland birds. ...
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Aerial surveys were conducted to produce abundance estimates for the three Alaska stocks of harbor porpoise. Surveys occurred from May to July 1997 for the Southeast Alaska stock, May to July 1998...
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The benthic images provided here are part of the CRCP-funded project aimed at establishing baseline Rapid Ecological Assessment (REA) surveys for coral reef benthic cover and composition at...
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CDC is collaborating with Vitalant Research Institute, American Red Cross, and Westat Inc. to conduct a nationwide COVID-19 seroprevalence survey of blood donors. De-identified blood samples are...
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RCCA volunteer citizen scientists conducted 18 visual scuba transects at each monitoring site to survey densities and sizes of ecologically and economically important fish, invertebrate and algal...
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This dataset, created in support of USGS Scientific Investigations Report 2020-5075, Estimates of Groundwater Discharge by Evapotranspiration, Stump Spring and Hiko Springs, Clark County, Nevada,...
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This child item contains Uncrewed Aircraft System (UAS) imagery from three data collection campaigns (flights) over the Pepperwood Preserve in Sonoma County, California. Each child item contains:...
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Surveys were conducted in the course of a reef fish survey cruise conducted by the NOAA Coral Reef Ecosystem Program (CREP) at the NOAA Pacific Islands Fisheries Science Center (PIFSC). These data...
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Arts Education Surveys of Elementary School Teachers, 2009 (FRSS 102), is a study that is part of the Quick Response Information System. FRSS 102 (https://nces.ed.gov/surveys/frss/) is a sample...
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Arts Education Surveys of Secondary School Teachers, 2009 (FRSS 103), is a study that is part of the Quick Response Information System. FRSS 103 (https://nces.ed.gov/surveys/frss/) is a sample...
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Secondary School Arts and Education Survey, 2009 (FRSS 101), is a study that is part of the Quick Response Information System. FRSS 101 (https://nces.ed.gov/surveys/frss/) is a sample survey that...
