0000000716 00000 n %%EOF Competition between the cable and broadcast industries: A niche analysis. Inference on Overlapping Coefficients in Two Exponential Populations Using Ranked Set Sampling. 0000000016 00000 n Earthquake-Related Changes in Species Spatial Niche Overlaps in Spring Communities. Habitat Distribution, Dietary Composition and Life History Characteristics of Odonate Nymphs in a Blackwater Coastal Plain Stream. mechanism structuring ecological communities and measures of niche overlap were developed to quantify differences due to competition (Chase & Leibold, 2003). Many methods of measuring niche overlap have been proposed, such as those of Renkonen, Morisita, and Horn. 0000007718 00000 n 0000003489 00000 n . ESA Headquarters1990 M Street, NWSuite 700 Journal of Statistical Theory and Practice. 0000001080 00000 n We have also added indices for the variance (Pianka.var and Czekanowski.var) and skewness (Pianka.skew and Czekanowski.skew) of pairwise niche overlap. Others apologize fornot using our technique, sometimes for good reasons. mechanism structuring ecological communities and measures of niche overlap were developed to quantify differences due to competition (Chase & Leibold, 2003). First, it is assumed that xp is a decreasing function satisfying i//(0) = 1, rp(l) = 0, and 0