Spatial pattern model of herbaceous plant mass at species level

Individual plant species distribute according to their own spatial pattern in a community. In this study, we proposed an index for measuring the spatial heterogeneity in mass (dry weight) of individual plant species. First, we showed that the frequency distributions for mass of individual plant spec...

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Published in:Ecological informatics 2014-11, Vol.24, p.124-131
Main Authors: Chen, Jun, Shiyomi, Masae
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Biological and medical sciences
Exponential distribution
Fundamental and applied biological sciences. Psychology
Gamma distribution
General aspects. Techniques
Herbaceous plant community
Methods and techniques (sampling, tagging, trapping, modelling...)
Random spatial pattern
Spatial heterogeneity
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description Individual plant species distribute according to their own spatial pattern in a community. In this study, we proposed an index for measuring the spatial heterogeneity in mass (dry weight) of individual plant species. First, we showed that the frequency distributions for mass of individual plant species per quadrat in a plant community are expressed using the gamma distribution with two parameters of λ (mean) and p. The parameter p is a measure indicating the level of spatial heterogeneity of plant mass as follows: (1) when p=1, the plant mass per quadrat has a random pattern; (2) when p>1, the plant mass has a spatial pattern with a lower heterogeneity than would be expected in the random pattern; and (3) when p
doi_str_mv 10.1016/j.ecoinf.2014.08.001
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The scatter diagram of (λ, p) for individual plant species, exhibits the spatial characteristics of each species in the community. We illustrated two examples of the (λ, p) diagram from data for individual species composing actual communities in a semi-natural grassland and a weedy grassland. 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The scatter diagram of (λ, p) for individual plant species, exhibits the spatial characteristics of each species in the community. We illustrated two examples of the (λ, p) diagram from data for individual species composing actual communities in a semi-natural grassland and a weedy grassland. Frequency distributions for the plant mass of individual species per quadrat followed the gamma distribution, and indi vidual species exhibited an inherent level of spatial heterogeneity. •To express the spatial patterns of the mass of a single plant species.•Definition of the random spatial patterns of plant mass.•Theoretical model using the gamma distribution for plant mass frequency distribution.•Validation of the model by survey-data.</description><subject>Animal, plant and microbial ecology</subject><subject>Biological and medical sciences</subject><subject>Exponential distribution</subject><subject>Fundamental and applied biological sciences. 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subjects Animal, plant and microbial ecology
Biological and medical sciences
Exponential distribution
Fundamental and applied biological sciences. Psychology
Gamma distribution
General aspects. Techniques
Herbaceous plant community
Methods and techniques (sampling, tagging, trapping, modelling...)
Random spatial pattern
Spatial heterogeneity
title Spatial pattern model of herbaceous plant mass at species level
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