2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/22/2018 | 10:00 AM - 10:15 AM | URBAN STREAMS AND THEIR RESPONSE TO EXTREME WEATHER EVENTS: DROUGHT AND HURRICANE IMPACTS ON STREAM BIOTA, PUERTO RICO | 410 B
URBAN STREAMS AND THEIR RESPONSE TO EXTREME WEATHER EVENTS: DROUGHT AND HURRICANE IMPACTS ON STREAM BIOTA, PUERTO RICO
Global change is increasing the frequency of intense climatic events in the Caribbean. Puerto Rico experienced one major drought and two large hurricanes in the past years. The 2015 drought was the most severe drought in the last 50 years. Hurricanes Irma and Maria hit the island during 2017, both as major hurricanes. While hurricanes and tropical storms often affect Puerto Rico, direct hits by major hurricanes occur once every 21 years. Here we assess and contrast the effects of drought and hurricane disturbance on macroinvertebrate and fish assemblages in the Rio Piedras watershed, Metropolitan San Juan. Composition of both assemblages changed in response to drought. Exotic fishes were able to establish after the drought. In contrast, only macroinvertebrate abundance responded strongly to hurricane disturbance. Both disturbances have major effects on stream ecosystems. However, drought had more negative impacts on the ecosystem by allowing the establishment of introduced species. Hurricane impacts are large, but similar than more frequent storms and local fauna might be preadapted to those impacts. Thus, the predicted increase in drought frequency might be of larger concern for urban streams than hurricanes.
- Urban
- Tropical Rivers
- Fish
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Presenters/Authors
Alonso RamÃrez
(), North Carolina State University, alonso.ramirez@ncsu.edu;
ASHA DISCLOSURE:
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Nonfinancial -
Pablo Gutiérrez-Fonseca
(), University of Costa Rica, pabloe.gutierrezfonseca@gmail.com;
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Nonfinancial -