ellenberg {blmeco}

Hohenheim groundwater table experiment of Heinz Ellenberg

Description

Heinz Ellenberg's historically important work on changes in the abundances of a community of grass species growing along experimental gradients of water table depth has played an important role in helping to identify the hydrological niches of plant species in wet meadows. The dataset comprises measurements taken from two similar experiments conducted in 1952 and 1953.

Usage

data(ellenberg)

Format

A data frame with 264 observations on the following 29 variables.

Year

two levels: 1952 and 1953

Soil

two levels: Loam and Sand

Water

Average distance to groundwater in cm, 10 levels for 1952, 11 levels for 1953: (-5), 5, 20, 35, 50, 65, 80, 95, 110, 125, 140

Species

6 species in 1952 and 4 species in 1953. Species 1952: Poa palustris, Festuca pratensis, Alopecurus pratensis, Dactylis glomerata, Arrhenatherum elatius, Bromus erectus. Species 1953: Alopecurus pratensis, Dactylis glomerata, Arrhenatherum elatius, Bromus erectus.

Mi.g

Individual yield of dried biomass in g in monocultures

Yi.g

Individual yield of dried biomass in g in mixtures

Mono.area.m2

Area of the yields in monocultures, 0.383 m in year 1952, 0.5 m in year 1953

Mix.area.m2

Area of the yields in mixtures, 1.2 m in year 1952, 1.5 m in year 1953

Div

Species richness, 6 in year 1952, 4 in year 1953

Moi.g.m2

Individual monoculture yields in m2

Yoi.g.m2

Individual mixture yields in m2

Mo.g.m2

Moi.g.m2 averaged over species by year, soil type and water level

Yo.g.m2

Yoi.g.m2 summed over species by year, soil type and water level

RYoi

Individual relative yield observed (Yoi.g.m2/ Moi.g.m2)

RYo

RYoi summed over species by year, soil type and water level

Yei.g.m2

Individual expected yield in m2 (Moi.g.m2 * RYe)

Ye.g.m2

Yei.g.m2 summed over species by year, soil type and water level

RRYo

Rescaled relative yield observed (RYoi/RYo)

deltaRYoi

Difference between relative observed yield and rescaled relative observed yield (RYoi - RRYo)

deltaRYo

deltaRYoi summed over species by year, soil type and water level

RYe

Relative yield expected in mixtures (1/Div)

deltaRYe

Difference between the rescaled relative yield observed and relative yield expected (RRYo- RYe)

RYT

Relative yield total summed over species by year, soil type and water level

level

two levels: species and community

NE

Net Effect (Yo.g.m2 - Ye.g.m2)

TICE

Trait-Independent Complementarity Effect (Mo.g.m2 * deltaRYo * Div)

SE

Selection Effect (NE - TICE)

TDCE

Trait-Dependent Complementarity Effect ((Moi.g.m2 - Mo.g.m2) * (deltaRYoi - deltaRYo) summed over species by year, soil type and water level)

DE

Diversity effect (SE - TDCE)

Details

A detailed description of the data set can be found in the methods section of Hector et al. (2012).

Source

http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0043358

References

Ellenberg H (1953) Physiologisches und oekologisches Verhalten derselben Pflanzenarten. Berichte der Deutschen Botanischen Gesellschaft 65: 350-361

Ellenberg H (1954) Ueber einige Fortschritte der kausalen Vegetationskunde. Plant Ecology 5/6: 199-211.

Lieth H, Ellenberg H (1958) Konkurrenz und Zuwanderung von Wiesenpflanzen. Ein Beitrag zum Problem der Entwicklung neu angelegten Gruenlands. Zeitschrift fuer Acker- und Pflanzenbau 106: 205-223.

Hector A, von Felten S, Hautier Y, Weilenmann M and Bruelheide H (2012) Effects of Dominance and Diversity on Productivity along Ellenberg's Experimental Water Table Gradients. PlosOne 7: e43358

Examples

data(ellenberg)