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field_methods:key_species_method [2008/12/31 12:47]
kcolson
field_methods:key_species_method [2012/03/08 15:48] (current)
jgillan
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 +<​sup>​[[:​bug_reporting|Report a bug, broken link, or incorrect content]]</​sup>​[[http://​methods.landscapetoolbox.org|{{ field_methods:​methodsguide3.png?​220x120|}}]]
 ====== Key Species Method ====== ====== Key Species Method ======
-[[http://​www.rangelandmethods.org/​about/​get_involved|{{:​abstract_in_dev.gif|}}]]+[[http://​www.landscapetoolbox.org/​about/​get_involved|{{:​abstract_in_dev.gif|}}]]\\ 
 +written by Karen Colson and Jason Karl
  
 ===== Description and Uses ===== ===== Description and Uses =====
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 With the Key Species method there is no need to disturb the vegetation (i.e., harvesting). ​ It is also very rapid since the estimated percentage of forage removed is recorded in one of seven broad classes rather than as an exact percentage. ​ This is also a more accurate approach since different observers are more likely to estimate utilization in the same classes than to estimate the same utilization percentages. ​   With the Key Species method there is no need to disturb the vegetation (i.e., harvesting). ​ It is also very rapid since the estimated percentage of forage removed is recorded in one of seven broad classes rather than as an exact percentage. ​ This is also a more accurate approach since different observers are more likely to estimate utilization in the same classes than to estimate the same utilization percentages. ​  
  
-However, observer bias can be a concern ​and it requires ​fairly rigorous training. ​   It can also be reduced through proper training since the accuracy of estimating utilization percentages depends upon the ability of observers to identify plant species and the amount of use. In order to accomplish this precision, the observers ​must first compare their ocular estimates against actual weight values obtained by clipping and weighing. ​ Exclosures, cages, or fenced areas are typically necessary for training purposes. +However, observer bias and subjectivity are a concern ​with this method making ​fairly rigorous training ​necessary ​Observers ​must first compare their ocular estimates against actual weight values obtained by clipping and weighing ​to train themselves.  Exclosures, cages, or fenced areas are also typically necessary for training purposes. ​ Cages should also be used to provide ungrazed plants to observe while conducting the monitoring. ​ Error can also be reduced by limiting observations to individual plants or small areas (quadrats).
- +
-This can be reduced by limiting observations to individual plants or small areas (quadrats). +
- +
- +
  
 ===== Manuals ===== ===== Manuals =====
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   *Utilization Studies and Residual Measurements (Technical Reference 1734-3) http://​www.blm.gov/​nstc/​library/​pdf/​utilstudies.pdf   *Utilization Studies and Residual Measurements (Technical Reference 1734-3) http://​www.blm.gov/​nstc/​library/​pdf/​utilstudies.pdf
   ​   ​
 +  *Swanson, S. et al. 2006. Nevada Rangeland Monitoring Handbook, Second Edition. Educational Bulletin 06-03.
 +http://​www.unce.unr.edu/​publications/​files/​ag/​2006/​eb0603.pdf
 +
 ===== Technical and Application References ===== ===== Technical and Application References =====
  
-  *Schmutz, Ervin M. 1971. Estimation of range use with grazed-class photo guides. Coop. Extension Service and Agr. Exp. Sta., Univ. of Ariz., Tucson, AZ, Bull. A-73. 16 p.+===== Similar Approaches =====
  
-  *Schmutz, E.M., G.A. Holt, and C.C. Michaels. 1963. Grazed class method of estimating forage utilization. Journal of Range Management. 16:54-60. 
  
-**The following are sources of existing photo guides:**+Related utilization and residue measurement methods include: 
 +  ​[[Cole Browse Method]] 
 +  ​[[Extensive Browse Method]] 
 +  * [[:field_methods:​twig_length_measurement]] 
 +  ​[[Stubble Height]] 
 +  ​[[Paired Plot Method]] 
 +  * [[comparative_yield_method]] 
 +  * [[Utilization - Grazed Class Method]] 
 +  * [[Herbaceous Removal-Height-Weight Method]] 
 +  * [[Herbaceous Removal-Actual Weight Method]] 
 +  * [[Herbaceous Removal-Ocular Method]] 
 +  * [[:​field_methods:​landscape_appearance_method]] 
 +  * [[:​field_methods:​pasture_condition_scoring]] 
 +  * [[:​field_methods:​stubble_height]] 
 +  * [[:​field_methods:​utilization_-_grazed_class_method]] 
 +  * [[:​field_methods:​use_pattern_mapping]]
  
-  *University of Arizona, Cooperative Extension Service and Agricultural +===== Additional Information ​=====
-Experiment Station, Tucson Arizona 85721. Bulletin A-73. +
-  *University of Idaho, College of Forestry, Wildlife and Range Science, +
-Moscow, Idaho 83843. Station bulletin 54. +
-  *Montana State University. Forage Use - A Tool for Planning Range +
-Management. Extension Service. July 1988. +
-  *Kinney and Clary. 1994. A Photographic Utilization Guide for Key Riparian +
-Graminoids. USFS GTR-308.  +
-  +
-===== Similar Approaches ​=====+
  
  
-===== Additional Information ​=====+===== Web Search Results ​===== 
 +<​html>​ 
 +<script src="​http://​www.google.com/​jsapi"></​script>​ 
 + 
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 +===== Discussion/​Comments =====
 +<​sub>​**You must have an account and be logged in to post or reply to the discussion topics below. [[http://​abstracts.rangelandmethods.org/​doku.php/​Home?​do=login&​sectok=db3676cff5bcd873b609b4e582432d73|Click here]] to login or register for the site.**</​sub>​
 +~~DISCUSSION| ~~
  
field_methods/key_species_method.1230752833.txt.gz · Last modified: 2012/02/22 13:28 (external edit)