TY - JOUR AU - Schmid, Bernhard AB - The increasing evidence for effects of biodiversity on ecosystem properties and processes indicates that effects may vary strongly over the range of studied systems. In order to explore patterns and draw some preliminary conclusions on biodiversity effects in different ecological contexts, we have compiled empirical data from original studies and reviews on effects of biodiversity in natural, agricultural, and forestry systems. We classified hypotheses according to observed ecosystem variables and trophic contexts; trophic contexts were distinguished according to the trophic position of the observed ecosystem variable and the trophic position of the organismic group whose diversity is hypothesized to cause an effect. With four basic ecosystem variables and 14 trophic contexts we obtained 56 permutations or specific hypotheses. Of these, 20 have so far been experimentally tested. We review the results reported from experimental tests of each hypothesis and examine how the reported effects are associated with characteristics of the studied systems. TI - ECOSYSTEM EFFECTS OF BIODIVERSITY: A CLASSIFICATION OF HYPOTHESES AND EXPLORATION OF EMPIRICAL RESULTS JF - Ecological Applications DO - 10.1890/1051-0761(1999)009[0893:EEOBAC]2.0.CO;2 DA - 1999-01-01 UR - https://www.deepdyve.com/lp/wiley/ecosystem-effects-of-biodiversity-a-classification-of-hypotheses-and-AmaF0wR0I6 SP - 893 EP - 912 VL - 9 IS - 3 DP - DeepDyve ER -