User Tools

Site Tools



This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision Both sides next revision
field_methods:plant_species_inventory [2014/01/29 17:58]
field_methods:plant_species_inventory [2014/01/30 16:32]
Line 62: Line 62:
 == 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 ===== 
-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 richness, like bare ground and other indicators, cannot be directly compared among sites with different soils and climate. ​ 
-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 species native to the area.  Within-plot comparisons over time must be carefully interpreted for the same reasons. ​ 
-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]]. ​ 
 ===== Manual ===== ===== Manual =====
field_methods/plant_species_inventory.txt ยท Last modified: 2014/01/30 19:34 by jgh