@article{RN720,
   author = {Ringvall, Anna and Petersson, Hans and Ståhl, Goran and Lämås, Tomas},
   title = {Surveyor Consistency in Presence/Absence Sampling for Monitoring Vegetation in a Boreal Forest},
   journal = {Forest Ecology and Management},
   volume = {212},
   number = {1-3},
   pages = {109-117},
   abstract = {The consistency of presence/absence assessments for a limited list of species was evaluated in a field test involving a large group of surveyors in the southern part of the boreal zone in Sweden. Comparisons were made between two groups with different experience in vegetation assessment. The vegetation species used were those that were reasonably common and easy to distinguish during the whole vegetation period. The surveyors were from the Swedish Forest Soil Inventory and the Swedish National Forest Inventory. Good consistency was found between surveyors, and high accuracy was found according to a reference survey for many of the tested species. Differences were found, however, although the magnitude of the observed bias and the differences between surveyors were fairly small for many of the tested species. A higher percentage of agreement and correct classification and a lower estimated bias and standard deviation of surveyor's differences were found for the group with more experience.},
   keywords = {Monitoring, Forest
Plants, Biologic
Sweden
Surveys
General},
   DOI = {10.1016/j.foreco.2005.03.002},
   url = {https://doi.org/10.1016/j.foreco.2005.03.002},
   year = {2005},
   type = {Journal Article}
}

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