Header logo

Title:
CSPs: Diversity measures based on tree and shrub species of the CSPs
Access rights:
Free for members
Usage rights:
BEF-China intern
Published:
No information available
Abstract:
Updated 2011-11-14: Different diversity measures, including richness, Shannon, Simpson, Eveness, rarefaction and phylogenetic diversity based on the tree and shrub species in the CSPs. Comparative Study Plots (CSP) of the Biodiversity - Ecosystem Functioning Experiment (BEF-China) were selected according to gradients in successive age and woody species diversity. Diversity indices are based on the dataset "Abundance of Tree and Shrub species in the Comparative Study Plots (CSP)" from Z1, SP3
Design:
No information available
Spatial extent:
The Gutianshan National Nature Reserve (NNR) is located in the western part of Zhejiang Province (29º8'18" – 29º17'29" N, 118º2'14" – 118º11'12" E, Fig. 1). The Gutianshan NNR has an area of approximately 81 km2 and was initially established as a National Forest Reserve in 1975 and became a National Nature Reserve in 2001. The NNR comprises a large portion of broad-leaved forests of advanced successional stages (Hu & Yu 2008), which have not been managed since the beginning of the 1990ies, as well as young successional stages and conifer plantations, mainly of Cunninghamia lanceolata and Pinus massoniana. --- The vegetation is composed of different types of subtropical evergreen and mixed broad-leaved forests (Yu et al. 2001). Most of the stands are secondary forests, evidenced by maximum tree ages of 180 years, by agricultural terraces in almost all plots and by the presence of charcoal in almost all soil profiles. Around the Gutianshan NRR extensive deforestation has occurred during the Great Leap Forward in the 1950s, as in most parts of Southeast China. However, due to prevailing steep slopes, the Gutianshan area was only marginally usable for agricultural activities, and thus an exceptionally intact forest cover has been preserved. --- The climate at Gutianshan NNR is warm and temperate with a short dry season in November and December and with warm summers (Fig. 2). The climatic conditions are characteristic for the subtropics with an annual average temperature of 15.1°C, January minimum temperatures of -6.8°C, July maximum temperatures of 38.1°C and an accumulated temperature sum (≥ 5°C) of 5221.5 degree days.
Temporal extent:
2007-2009
Taxonomic extent:
No information available
Measurement cirumstances:
No information available
Data analysis:
No information available

Filter:
Dataset column

Name:
CSP
Definition:
name of the CSP in the Nature ReserveBEF research plot nameReasearch plots of the Biodiversity - Ecosystem functioning experiment (BEF-China). There are three main sites for research plots in the BEF Experiment: Comparative Study Plots (CSP) in the Gutianshan Nature Reserve, having a size of 30x30m^2, measured on the ground.
Unit:
id
Datagroup:
BEF research plot name
Keywords:
CSP
Values:
CSP01
CSP02
CSP03
CSP04
CSP05
Contributors:
No information available

Dataset column

Name:
rarefy_100
Definition:
estimate of species number by randomly drawing 100 individuals (rarefaction) Rarefaction curves show the increase in species number with an increase of sampled individuals. R uses rarefy() from the package vegan to estimated species number for a given number of individuals. To compare different plots, the number of individuals should be smaller than the minimum number of individuals.
Unit:
count
Datagroup:
Taxonomic biodiversity
Keywords:
biodiversity, rarefied diversity
Values:
15.25412562
16.77861972
18.11426524
16.70766334
14.1498851
Contributors:

Dataset column

Name:
rarefy_150
Definition:
estimate of species number by randomly drawing 150 individuals (rarefaction) Rarefaction curves show the increase in species number with an increase of sampled individuals. R uses rarefy() from the package vegan to estimated species number for a given number of individuals. To compare different plots, the number of individuals should be smaller than the minimum number of individuals.
Unit:
count
Datagroup:
Taxonomic biodiversity
Keywords:
biodiversity, rarefied diversity
Values:
18.9879178142534
16.3495699866678
17.9835641625816
21.4050395995021
19.9003489513211
Contributors:
No information available

Dataset column

Name:
rar_se_150
Definition:
standard error of the rarefaction estimate of species number given 150 , individuals, Rarefaction curves show the increase in species number with an increase of sampled individuals. R uses rarefy() from the package vegan to estimated species number for a given number of individuals. This is done by randomly drawing individuals from the specified set of individuals. Since this is done several times, a standard error of the estimate can be given.
Unit:
count
Datagroup:
Taxonomic biodiversity
Keywords:
No information available
Values:
1.288955006708
1.76623888700344
1.57248411592856
1.85777405018676
1.74980648752147
Contributors:
No information available

Dataset column

Name:
shannon
Definition:
Shannon diversity, The Shannon diversity is given by H = -sum (p_i log(p_i)), p_i is the relative abundance of the ith species. R provides this through the vegan package: diversity(x).
Unit:
No information available
Datagroup:
Taxonomic biodiversity
Keywords:
biodiversity, shannon diversity
Values:
2.15652761556872
2.00100657919975
2.33790930497816
1.80135260900934
2.20757996553768
Contributors:
No information available

Dataset column

Name:
simpson
Definition:
Simpson diversity, The Simpson diversity is given by D = sum p_i^2, with p_i representing the relative abundance of the ith species. R provides this through the vegan package: diversity(x, index="simpson")
Unit:
No information available
Datagroup:
Taxonomic biodiversity
Keywords:
simpson diversity
Values:
0.855971684531093
0.776980957748114
0.716691365917927
0.771700211449605
0.820868211625887
Contributors:
No information available

Dataset column

Name:
rich
Definition:
Species richness of trees and shrubs, Trees were counted when they exceeded 1m height. This data is aggregated from the raw data provided by Martin Böhnke and Martin Baruffol; in R with vegan: specnumber()
Unit:
count
Datagroup:
Taxonomic biodiversity
Keywords:
species richness
Values:
30
27
32
25
29
Contributors:
No information available

Dataset column

Name:
even_shan
Definition:
Evenness based on Shannon diversity and species richness, Eveness as defined by Ricotta, C. A semantic taxonomy for diversity measures Acta Biotheoretica, 2007, 55, 23-33: shannon/log(rich)
Unit:
No information available
Datagroup:
Taxonomic biodiversity
Keywords:
eveness
Values:
0.529623072957036
0.606558789258259
0.687756486697894
0.606880460998821
0.572287216321793
Contributors:
No information available

Dataset column

Name:
gen_fam_div
Definition:
Phylogenetic diversity based on genus and familiy, Phylogenetic diversity is calculated using Rao's Q. This is basically the mean distance of all pairswise distances between individuals in phylogenetic space. I used genus and family name to calculate phylogenetic distances between species. R provides Rao's Q and tools for calculating phylogenetic distances in the package ade4. Commands: as.taxo(), divc()
Unit:
No information available
Datagroup:
Taxonomic biodiversity
Keywords:
phylogenetic diversity
Values:
2.23792309499569
2.08312498478908
2.27015665777399
2.41848821766954
2.43757701491914
Contributors:
No information available

No information available


No information available
No information avialable

Filter:
3 nadrowski medium

Karin
Nadrowski

Owner of:
44 Datasets

Involved in:
1 Projects

E-Mail Profile
No information available

No information available
No information available

No information available
No information available