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field_methods:plant_species_inventory [2014/01/29 17:52]
jgh
field_methods:plant_species_inventory [2014/01/30 16:32]
jgh
Line 63: Line 63:
 == 3. Identify potential species of management concern for the plot and record presence or absence of these species. ==  == 3. Identify potential species of management concern for the plot and record presence or absence of these species. == 
  
-===== Vegetation Height Indicator Calculations ​===== +===== Manual ​===== 
-Species inventories detect the presence of rare or invasive species which may not be detected by cover or density measurements along transects due to their infrequent occurrence, rarity, or recent establishment. ​ This method can identify areas where additional plant surveys are needed. ​ A plot-level species inventory also provides information on species richness, one indicator of biodiversity Plot biodiversity indicators must be evaluated within the context of the ecological potential of the plot (e.g., as defined by an ecological site description).  ​Consequently species richnesslike bare ground ​and other indicators, cannot be directly compared among sites with different soils and climate+  ​* USDA-ARS Jornada Experimental Range. (2014). //​Monitoring Manual for GrasslandShrubland ​and Savanna Ecosystems//​Volume I: Core Methods. 2nd Ed. pp. 54-56. http://​jornada.nmsu.edu/​monit-assess/​manuals/​monitoring
  
-Ecological heterogeneity can also affect richness: a plot that spans several soil types will likely ​have higher biodiversity than a plot located on a single soil.  Similarly, a plot that includes several ecological states on the same or different soils is likely to have more species. ​ Species richness may even be higher ​in a somewhat disturbed ​or degraded state than in an undegraded state as invasives colonize, but do not entirely replace spe¬cies native ​to the area ​Within-plot comparisons over time must be carefully interpreted ​for the same reasons+===== Discussion/​Comments ===== 
 +<​sub>​**You must have an account and be logged ​in to post or reply to the discussion topics below[[http://​wiki.landscapetoolbox.org/​doku.php/​Home?​do=login&​sectok=db3676cff5bcd873b609b4e582432d73|Click here]] to login or register ​for the site.**</​sub>​
  
-Consequently,​ caution should be used when comparing plots using species richness as an indicator of site biodiversity. ​ Interpretation of species richness should always be made in an ecological context together with indicators derived from [[field_methods:​line_point_intercept|Line-point intercept]],​ [[field_methods:​basal_gap_intercept|Gap intercept]],​ and [[field_methods:​soil_stability|Soil stability]]. ​ 
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-===== Manual ===== 
-  * USDA-ARS Jornada Experimental Range. (2014). //​Monitoring Manual for Grassland, Shrubland and Savanna Ecosystems//​. Volume I: Core Methods. 2nd Ed. pp. 54-56. http://​jornada.nmsu.edu/​monit-assess/​manuals/​monitoring 
  
field_methods/plant_species_inventory.txt · Last modified: 2014/01/30 19:34 by jgh