Geoecology: An Evolutionary Approach - Richard J. Huggett - Google Books

http://books.google.de/books?id=VyQjwI9UkVIC&pg=PA95&vq=hesse&dq=%22Hesse's+Rule%22&source=gbs_search_s&sig=ACfU3U01Ax3I2u3y2Sh8

Animals, plants and soils interact with one another, with the terrestrial spheres, and with the rest of the Cosmos. On land, this rich interaction creates landscape systems or geoecosystems. Geoecologyinvestigates the structure and function of…