Plant height along the plant diversity gradient in the Jena Experiment (Main Experiment, year 2003)

This data set contains measurements of plant height: vegetative height (length of the main axis) in 2003 from the Main Experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the Main Experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and functional richness (1, 2, 3, 4 functional groups). Plots were maintained by bi-annual weeding and mowing. In 2003, plant height was recorded twice a year just before biomass harvest (during peak standing biomass in late May and in late August). For 30 target plant individuals harvested at 10 cm distances along a 5 m transect in a control area at the margin of each experimental plot, vegetative height (length of the main axis) was measured as the length of the main axis of the plant. Provided is the mean over the measured plants per plot.

Inclination of the two main components of magnetization and 87Sr/86Sr ratios for dolomites at DSDP Hole 77-536

Site 536 terminated in a shallow-water dolomite of unknown age. Paleomagnetic measurements combined with strontium isotope analyses suggest that the dolomite was deposited in the Middle Jurassic to Early Cretaceous time interval. However, the assumptions required to reach this determination make these results less than conclusive.