MNND

AcronymDefinition
MNNDMean Nearest Neighbour Distance
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Values of mean centroid distance and mean nearest neighbor distance (i.e., CD ~1.35 and MNND ~1.54) indicate similar elasmobranch diet diversity and high trophic redundancy.
NR: range, CR: [delta]13C range, TA: total area, CD: distance to centroid, MNND: mean nearest neighbour distance and, SDNND: standard deviation of MNND.
LPI = Largest patch index; NP = Number of patches; MPS = Mean patch size; LSI = Landscape shape index; MSI = Mean shape index; MCAP = Mean core area per patch; TCAI = Total core area index; MNND = Mean nearest neighbor distance Index * Colombia Ecuador 1973 1985 1996 1973 1985 1996 LPI (%) 69.58 34.0 33.0 76.07 41.29 39.38 NP 1280 9592 11728 854 7967 9188 MPS (ha) 80.35 8.98 5.33 182.36 17.48 13.55 LSI 32.93 102.46 111.21 26.55 78.98 103.78 MSI 1.36 1.29 1.31 1.34 1.29 1.32 MCAP (ha) 55.28 3.18 1.79 143.91 9.39 6.32 TCAI (%) 68.80 35.38 33.52 78.91 53.74 46.66 MNND (m) 75.80 43.17 51.21 64.94 40.78 38.70
The NTI was defined as [-(MNND - [MNND.sub.null])/ sd.[MNND.sub.null]], where [MNND.sub.null] was the mean MNND for the cerrado species from 999 null communities and sd.[MNND.sub.null] was the standard deviation of MNND for the cerrado species from these 999 null communities (Webb et al., 2007).
Number of species, observed mean nearest neighbour distance (MNND), mean MNND for the cerrado species from 999 null communities (MNNDnull), standard deviation of the MNNDnull (sd.MNNDnull), and the nearest taxon index (NTI; Webb, 2000).