Indirect facilitation as a structuring mechanism of submersed aquatic plants : a buffering role under biotic and abiotic constraints

摘要: Direct facilitation among plants has recently been included into the humped-back diversitybiomass relationship along environmental severity gradients. However, recent evidence stresses occurrence of indirect due to biotic disturbance under a wide range severity, and including will thus bring these conceptual frameworks up date. We propose new model variation in plant interactions both gradients, combining earlier models theories an integrated approach. This response surface underlines peak direct/indirect related hot-spots diversity intermediately severe biotically disturbed environments, explains how communities might expand into, or be excluded from, harsh environments.