. Proceedings of the Symposium on Management of Forest and Range Habitats for Nongame Birds, May 6-9, 1975, Tucson, Arizona. Birds Conservation Congresses; Birds Habitat Congresses; Range management Congresses; Wildlife habitat improvement Congresses. iâ'âIâ'âIâ'âIââ âIââ I â I 27 31 35 39 43 47 51 DEGREES NORTH LATITUDE in vegeCation studies. First, we compared total species in the strata by accumulating species, one route at a time (fig. 6). Next, we calculated cumulative species diversity indices by progressively adding the species and numbers of individuals, then recalculating the species
. Proceedings of the Symposium on Management of Forest and Range Habitats for Nongame Birds, May 6-9, 1975, Tucson, Arizona. Birds Conservation Congresses; Birds Habitat Congresses; Range management Congresses; Wildlife habitat improvement Congresses. iâ'âIâ'âIâ'âIââ âIââ I â I 27 31 35 39 43 47 51 DEGREES NORTH LATITUDE in vegeCation studies. First, we compared total species in the strata by accumulating species, one route at a time (fig. 6). Next, we calculated cumulative species diversity indices by progressively adding the species and numbers of individuals, then recalculating the species diversity index from the pooled routes in each stratum (fig. 7). Theoretically, if one kept increasing the sample size in a given stratum, he should eventually encounter all the species in that stratum. Figure 6 indicates that, even for the five strata with the most routes run in 1973, the slope of the cumulative species curve is still positive. For example, in the Spruce- Hardwood Forest stratum, 168 routes were run Figure 4.âRelationships of average number of species recorded per route with degrees north latitude between longitudes 95°00' and 105°00' West. SpruceâHord wood Forest 5 o s H > tâIâ1âIâ1âIâIâIâ1âr 27 31 35 39 43 47 DEGREES NORTH LATITUDE 1 51 Figure 5.âRelationship of average species diversity recorded per route with degrees north latitude between longitudes 95°00' and 105°00' West. Cumulative Indices. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Symposium on Management of Forest and Range Habitats for Nongame Birds (1975 : Tucson, Ariz. ); Smith, Dixie R; United States. Forest Service. [Washington, D. C. ?] : U. S. Dept. of Agriculture, Forest Service
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