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field_methods:key_species_method [2008/12/31 12:42]
kcolson created
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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 ===== Advantages and Limitations ===== ===== Advantages and Limitations =====
  
-The Key Species method is rapid since the estimated percentage of forage removed is recorded in one of seven broad classes rather than as an exact percentage.  ​It can be reasonably ​accurate, assuming the observers are well trained ​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. ​ This can be reduced by limiting observations to individual plants or small areas (quadrats).  ​+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 this method there is no need to disturb the vegetation (i.e.harvesting). ​  +Howeverobserver 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).
- +
-Training ​and experience ​are important when conducting ​this method and exclosures, cages, or fenced areas are typically necessary for training purposes.+
  
 ===== 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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 +        searchControl.draw(document.getElementById("​book_results"​),​ drawOptions);​ 
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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.1230752529.txt.gz · Last modified: 2012/02/22 13:28 (external edit)