摘要：Additions of large wood (LW) have become a go-to technique for
recovering altered river ecosystems. However, successful applications
of this technique are generally limited to unchannelized rivers
and headwater streams. Channelization of rivers, that is,
engineering river channels to reduce recruitment and retention of
in-channel structure, may, by definition, limit success of this restoration
technique. Moreover, sufficient time has passed (a century
or more) since initial channelization of many large rivers that
portions of the fish community associated with LW may have
become extirpated. Thus, the maxim that LW leads to a positive
fish community response may not hold true. We examined fish
community associations in habitats with and without LW in the
channelized Missouri River to gain an understanding of the role
of LW in large, channelized rivers. There were some differences
between habitats with wood present compared to those without,
but the differences were not evident once year, season and channel
modifications intended to create aquatic habitat were taken
into account. We assert that careful planning is necessary to
ensure that additions of LW in channelized rivers are made to
appropriate locations such that it will be retained in-channel for
use as fish habitat and that LW-associated species are found in
the system.
关键词：Missouri River ; woody debris ; fish community
