Data_spider

These data were sampled in a mountain forest ecosystem in the Bavarian Forest National Park, Germany (Thorn et al. 2016, 2017).
 A total of 12 experimental plots were established in "closed forest" stands (6 plots) and "open forest" stands with naturally occurring gaps and edges (6 plots) to assess the effects of microclimate on communities of epigeal (ground-dwelling) spiders. 
 Epigeal spiders were sampled over three years with four pitfall traps in each plot, yielding a total of 3171 individuals belonging to 85 species recorded in the pooled habitat. In the open forest, there were 1760 individuals representing 74 species, whereas in the closed forest, there were 1411 individuals representing 44 species.

datasets

Expands 'iNEXT' to include the estimation of sample completeness and evenness. The package provides simple functions to perform the following four-step biodiversity analysis:
STEP 1: Assessment of sample completeness profiles.
STEP 2a: Analysis of size-based rarefaction and extrapolation sampling curves to
determine whether the asymptotic diversity can be accurately estimated.
STEP 2b: Comparison of the observed and the estimated asymptotic diversity profiles.
STEP 3: Analysis of non-asymptotic coverage-based rarefaction and extrapolation sampling curves.
STEP 4: Assessment of evenness profiles.
The analyses in STEPs 2a, 2b and STEP 3 are mainly based on the previous 'iNEXT' package. Refer to the 'iNEXT' package for details. This package is mainly focusing on the computation for STEPs 1 and 4. See Chao et al. (2020) <doi:10.1111/1440-1703.12102> for statistical background.

Anne Chao

iNEXT.4steps

Four-Step Biodiversity Analysis Based on 'iNEXT'

KaiHsiang Hu

Data_spider function

<code>Woody_plants</code> is a species-by-assemblages data.frame with 85 species in two sites. 
 $ Open : int 350 325 237 102 91 72 68 61 53 50 ... 
 $ Closed: int 10 55 502 1 3 4 171 140 180 24 ...

Format

These data were sampled in a mountain forest ecosystem in the Bavarian Forest National Park, Germany (Thorn et al. 2016, 2017).
 A total of 12 experimental plots were established in "closed forest" stands (6 plots) and "open forest" stands with naturally occurring gaps and edges (6 plots) to assess the effects of microclimate on communities of epigeal (ground-dwelling) spiders. 
 Epigeal spiders were sampled over three years with four pitfall traps in each plot, yielding a total of 3171 individuals belonging to 85 species recorded in the pooled habitat. In the open forest, there were 1760 individuals representing 74 species, whereas in the closed forest, there were 1411 individuals representing 44 species.

Spider abundance data — Data_spider

<code>Woody_plants</code> is a species-by-assemblages data.frame with 85 species in two sites. 
 $ Open : int 350 325 237 102 91 72 68 61 53 50 ... 
 $ Closed: int 10 55 502 1 3 4 171 140 180 24 ...

Data_spider: Spider abundance data

Description

Usage

Arguments

Format

Examples