In this study, we propose to use metacommunity theory as a conceptual framework to better understand how river network structure influences the spatial organization of aquatic communities in glacierized catchments.

The chimps in the zoo were making a racket.

Now conservation of helicity is maintained: the writhe of the loops in the second panel is compensated for by the opposite sign of the twist helicity along the loops.

The neighborhood appealed to me, particularly at night when the full squalor and lugubriousness of it made itself felt.