2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

<< BACK TO AGENDA

5/21/2018  |   12:00 PM - 12:15 PM   |  INTERMITTENT AND PERENNIAL STREAM MACROINVERTEBRATE COMMUNITY RESPONSE TO IMPERVIOUS COVER: THRESHOLD INDICATOR TAXA ANALYSIS AND PERMUTATIONS   |  310 A

INTERMITTENT AND PERENNIAL STREAM MACROINVERTEBRATE COMMUNITY RESPONSE TO IMPERVIOUS COVER: THRESHOLD INDICATOR TAXA ANALYSIS AND PERMUTATIONS

The urban stream syndrome and the impact of impervious cover on macroinvertebrate communities is well-documented, but many exclude intermittent streams despite their prevalence. This study investigated macroinvertebrate communities of intermittent and perennial streams separately in the South Coast and Chaparral regions of California, USA. Macroinvertebrate data from Southern California Coastal Water Research Project and California Environmental Data Exchange Network were used in Threshold Indicator Taxa Analysis (TITAN) to determine macroinvertebrate community’s ecological thresholds and responses to impervious cover across the urban gradient. In a new approach to TITAN, statistical differences in thresholds along impervious cover gradients were determined by permuting observations 1) between intermittent and perennial streams, 2) during different weather regimes described by Palmar Drought Severity Index, 3) between Chaparral and South Coast regions, both with Mediterranean climates, and 4) before and after implementation of the 2010 General Construction Permit in California that developed more stringent stormwater regulations for construction projects. Preliminary results indicated low ecological thresholds (<1% impervious cover) for both intermittent and perennial streams. Results from this study will be used to quantify the ecological influence of the California 2010 General Construction permit with future sampling.

  • Invertebrate
  • Intermittent
  • Watershed

Presentation:
This presentation has not yet been uploaded.

Handouts:
Handout is not Available

Transcripts:
CART transcripts are NOT YET available, but will be posted shortly after the conference


Presenters/Authors

Stephanie Figary (), ORISE Research Participant at the USEPA EPA/ORD/NHEERL Atlantic Ecology Division, figary.stephanie@epa.gov;


ASHA DISCLOSURE:

Financial -

Nonfinancial -

Naomi Detenbeck (), U.S. EPA/ORD/NHEERL Atlantic Ecology Division, Detenbeck.Naomi@epa.gov;


ASHA DISCLOSURE:

Financial -

Nonfinancial -