Evaluation of a Trace Plant Density Score in Long Term Resource Monitoring (LTRM) Vegetation Monitoring Data
The Long Term Resource Monitoring (LTRM) program employs a destructive harvest method for sampling aquatic vegetation whereby a rake is dragged ~1.5 m over the substrate and plant materials are retrieved. The density of each species of submersed aquatic vegetation (SAV), and of all species combined, are scored based on the amount of plant material collected on the teeth of each rake. Plant density (PD) scores are ordered and vary from 0 (no plants captured) to 5 (80-100% of rake teeth covered). The PD score of 1 has represented the vast majority of all non-zero values since 1998 and is associated with a wide range of biomass (e.g. <1g to 694g fresh weight in Pools 4 and 8 during the 2017 field season). However, small plant fragments account for a large proportion of individual species and combined species samples within this density score. This study evaluated a potential new “trace” PD score in the field in 2018 in Pools 4, 8 and 13 whereby trace was defined as any visible plant material up to 1/13th of a traditional PD score of 1.
Complete Metadata
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| description | The Long Term Resource Monitoring (LTRM) program employs a destructive harvest method for sampling aquatic vegetation whereby a rake is dragged ~1.5 m over the substrate and plant materials are retrieved. The density of each species of submersed aquatic vegetation (SAV), and of all species combined, are scored based on the amount of plant material collected on the teeth of each rake. Plant density (PD) scores are ordered and vary from 0 (no plants captured) to 5 (80-100% of rake teeth covered). The PD score of 1 has represented the vast majority of all non-zero values since 1998 and is associated with a wide range of biomass (e.g. <1g to 694g fresh weight in Pools 4 and 8 during the 2017 field season). However, small plant fragments account for a large proportion of individual species and combined species samples within this density score. This study evaluated a potential new “trace” PD score in the field in 2018 in Pools 4, 8 and 13 whereby trace was defined as any visible plant material up to 1/13th of a traditional PD score of 1. |
| distribution |
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| identifier | http://datainventory.doi.gov/id/dataset/USGS_5f6f60a382ce38aaa24c1793 |
| keyword |
[
"Biomass",
"Plant Density",
"Pool 13",
"Pool 4",
"Pool 8",
"Submersed Aquatic Vegetation",
"USGS:5f6f60a382ce38aaa24c1793",
"Upper Mississippi River",
"biota"
]
|
| modified | 2022-04-20T00:00:00Z |
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{
"name": "U.S. Geological Survey",
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|
| spatial | -92.58, 41.32, -89.98, 44.68 |
| theme |
[
"Geospatial"
]
|
| title | Evaluation of a Trace Plant Density Score in Long Term Resource Monitoring (LTRM) Vegetation Monitoring Data |
