Worldwide evidence of a unimodal relationship between productivity and plant species richness

The search for predictions of species diversity across environmental gradients has challenged ecologists for decades. The humped-back model (HBM) suggests that plant diversity peaks at intermediate productivity; at low productivity few species can tolerate the environmental stresses, and at high productivity a few highly competitive species dominate. Over time the HBM has become increasingly controversial, and recent studies claim to have refuted it. Here, by using data from coordinated surveys conducted throughout grasslands worldwide and comprising a wide range of site productivities, we provide evidence in support of the HBM pattern at both global and regional extents. The relationships described here provide a foundation for further research into the local, landscape, and historical factors that maintain biodiversity.

Diary of Henry Flynt, 1723-1747

This diary, effectively a commonplace book, documents Flynt's daily activities and personal reflections from 1723 to 1747. Many entries concern his dealings with family members, business associates, acquaintances, ministers, and political officials. The diary includes a list of books Flynt loaned to others from 1723 to 1743 and detailed financial entries from 1724 to 1747. These entries provide information about the costs of goods and services, as well as Flynt's consumption habits; they detail where he traveled, what he ate and drank (including, apparently, many pounds of almonds), what he read, and many other aspects of daily life. The diary also contains entries related to Flynt's land holdings and other investments, as well as copies of meeting minutes from several sessions of the Harvard Board of Overseers.

Epitaph for Henry Flynt : manuscript copy, 1760

Twenty-five line handwritten epitaph in Latin written by Professor Edward Wigglesworth for Henry Flynt. Begins, "Huic Tumulo mandantur Exuvia / Vin admodum venerabilis Henrici Flynt Armigeri."

Palmer, Massachusetts 15 Minute Digital Raster Graphic

This layer is a digital raster graphic of the historic 15-minute USGS topographic map of the Palmer, Massachusetts quadrangle. The survey date (ground condition) of the original paper map is 1886-1887, the edition date is June, 1893 and this map has a reprint date of 1941. A digital raster graphic (DRG) is a scanned image of a U.S. Geological Survey (USGS) standard series topographic map, including all map collar information. The image inside the map neatline is geo-referenced to the surface of the earth and fit to the Universal Transverse Mercator projection. The horizontal positional accuracy and datum of the DRG matches the accuracy and datum of the source map.

1882 University of Michigan Baseball Team

Top Row: John Henry Rollins, Walter Davis, Thomas P. Antle

Front Row: capt. William S. Harvey, Charles G. Allmendinger, Arthur P. Packard, Moses Fleetwood Walker, Frank W. Davenport, Richard Dott

Studies in Longfellow. Outlines for schools, conversation classes, and home study.

Mode of access: Internet.

The story of the Shakers and some of their favorite cooking recipes : calendar for 1882.

"Presented by Mrs. Martha E. Partridge South Reading, Vt.": p. [36].

Three dances from the music to Henry VIII.

Pl. no. 11104.

Die russische Regierung und die westeuropäischen Juden : zur Schulreform in Russland, 1840-44 : nach archivalischen Materialien /

"Separatabdruck aus 'Monatsschrift für Geschichte und Wissenschaft des Judentums' 57. Jahrgang"--T.p. verso.

The gospels in art; the life of Christ by great painters from Fra Angelico to Holman Hunt, the text by Léonce Bénédite, Henry Van Dyke, R. F. Horton and the Bishop of Derry & Raphoe;

On cover : The Bible in art: The New Testament.

Business accounting ...

199 p. 19.5 cm. On cover: Business accounting, reading guide and general index.

Lingard's History of England : newly abridged and brought down to the accession of King Edward VII /

Mode of access: Internet.