Downward, upstream or downstream? Assessment of meio- and macrofaunal colonization patterns in a gravel-bed stream using artificial substratesMaria Cristina Bruno, Elisa Bottazzi and Giampaolo RossettiAnn. Limnol. - Int. J. Lim., 48 4 (2012) 371-381DOI: https://doi.org/10.1051/limn/2012025