SASSCAL ObservationNet
 
 HomeToggekry InfosheetToggekry Time series of plant diversity
BMBF Logo
 Toggekry (S04) - Time series of plant diversity
Graphical representation of diversity patterns in space and time

Species richness [Diversity]


Species richness of all grass species on 1000 m² over the years (ID=103)
(created by Ben Strohbach)
The Boxplots shows the variation in species richness of all grass species on 20 plots of 1000 m² in size at the biodiversity observatory S04 Toggekry. Boxplot represents: whiskers = Minimum & Maximum, box= lower and upper Quartile, horizontal bold line = median.

Shannon diversity [Diversity]


Shannon diversity index of all grass species on 1000 m2 over the years. (ID=101)
(created by Ben Strohbach)
The box plots shows the variation in the Shannon diversity index of all grass species on 20 plots of 1000 m2 in size at the biodiversity observatory S04 Toggekry. Box plot represents: whiskers = Minimum & Maximum, box= lower and upper Quartile, horizontal bold line = median.

Simpson diversity [Diversity]


Simpson diversity index of all grass species on 1000 m² over the years. (ID=105)
(created by Ben Strohbach)
The box plots shows the variation in the Simpson diversity index of all grass species on 20 plots of 1000 m² in size at the biodiversity observatory S04 Toggekry. Box plot represents: whiskers = Minimum & Maximum, box= lower and upper Quartile, horizontal bold line = median.

Pielou's evenness [Diversity]


Variance of Pielou's Evenness index for grass species on 1000 m² plots over the years. (ID=100)
(created by Ben Strohbach)
The Boxplots shows the variation in the evenness value for all grass species on 20 plots of 1000 m2 in size at the biodiversity observatory S04 Toggekry. Boxplot represents: whiskers = Minimum & Maximum, box= lower and upper Quartile, horizontal bold line = median. - These applies to all the graphs.

Dominance [Diversity]


Variance of the Dominance index for grass species on 1000 m² plots over the years. (ID=118)
(created by Ben Strohbach)
The Boxplots shows the variation in the Dominance value for all grass species on 20 plots of 1000 m2 in size at the biodiversity observatory S04 Toggekry. Boxplot represents: whiskers = Minimum & Maximum, box= lower and upper Quartile, horizontal bold line = median.

Rainfall [Climate]


Total rainfall (mm) per year for the observatory S4 Omatako Ranch. (ID=110)
(created by Ben Strohbach)
Quality of the rainfall season, calculated for a rainfall season from August to July in the following year, based on data from SASSCAL Weathernet and gap-filled with WorldClim historic data (Fick and Hijmans, 2017). The quality of the season is based on criteria developed by Gibbs and Maher (1967) and Botha (1999) and indicated by colour-coding: Brown: extreme drought, precipitation below the 10th percentile (213 mm), light-brown: drought, precipitation below the 40th percentile (336 mm), green: normal, precipitation between the 40th and 70th percentile (336 and 395 mm), blue-green: wet, precipitation above the 70th percentile (395 mm), and blue: extreme wet years, precipitation above the 90th percentile (549 mm). The stippled line represents the long-term median rainfall (362 mm).

SPEI [Climate]


Standardised Precipitation-Evapotranspiration Index (SPEI) for a 12-months interval. (ID=119)
(created by Ben Strohbach)
The SPEI index is a standardised monthly climatic balance computed as the difference between the cumulative precipitation and the potential evapotranspiration (Vicente-Serrano et al. 2010). For this presentation the SPEI value per month is based on the accumulated values of the previous 12 months. Red bars indicate drought, blue bars humid conditions.