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Long-term patterns in fish and benthic macroinvertebrates in northern California mediterranean-climate streams
Hydrobiologia (2012)
  • Vincent H Resh
  • Leah A Bêche
  • Justin E Lawrence
  • Raphael D Mazor
  • Eric P McElravy
  • Dr Alison Purcell O'Dowd, Humboldt State University
  • Deborah Rudnick
  • Stephanie M Carlson
Long-term studies can document temporal
patterns in freshwater ecosystems, and this is particularly
important in mediterranean-climate (med-climate)
regions because of strong interannual variation
in precipitation amounts and consequently stream
flow. We review long-term studies of populations and
communities of benthic macroinvertebrate and fishes
from sites throughout the med-climate region of
California and develop generalities that may apply
broadly to med-climate streams worldwide. Severe
drought may result in community shifts, and alter agestructure
in both macroinvertebrates and fishes.
Within-year seasonal patterns in macroinvertebrate communities can be influenced by annual variability in
flow regimes. Macroinvertebrate biological-monitoring
metrics with consistently low intra-annual variability
may be especially applicable in med-climate
streams, as is the use of different temporal windows to
describe reference periods to reduce influence of
interannual variability on impact detection. Long-term
data can be used to develop macroinvertebrate-based
metrics that can either show or be independent of
climate-change effects. Most macroinvertebrate species
are temporally rare in their annual occurrence.
Multiple components of natural flow regimes can
favor native over invasive fishes. Long-term, quantitative
information from med-climate streams is
generally lacking, which is a hindrance to both management practices and development of appropriate
ecological constructs.
  • Biological Monitoring,
  • Long-term variability,
  • Benthic macoinvertebrates,
  • Fishes,
  • Streams,
  • Mediterranean climate
Publication Date
Fall November 21, 2012
Citation Information
Vincent H Resh, Leah A Bêche, Justin E Lawrence, Raphael D Mazor, et al.. "Long-term patterns in fish and benthic macroinvertebrates in northern California mediterranean-climate streams" Hydrobiologia (2012)
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