2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/25/2021 | 8:30 AM - 10:30 AM | EFFECTS OF HURRICANE DISTURBANCE ON SHRIMP ASSEMBLAGES IN A TROPICAL HEADWATER STREAM | Virtual Platform
EFFECTS OF HURRICANE DISTURBANCE ON SHRIMP ASSEMBLAGES IN A TROPICAL HEADWATER STREAM
Hurricane disturbances have profound long-term impacts on habitat diversity and food web dynamics in tropical islands, including streams where they promote a shift from predominantly detritus-based to algal-based headwater stream ecosystems. Here we study how Puerto Rican mountainous stream shrimp assemblages responded to disturbances from hurricanes Irma and Maria in September 2017. We hypothesize that changes in shrimp assemblages were driven by the drastic changes in canopy openness, increased food resources (leaf deposition and periphyton biomass) and habitat refugia from hurricane disturbance. We sampled shrimps once a month on 18 pools along two parallel 100 m headwater streams since October 2016. Hurricane disturbance resulted in above average shrimp abundance (F=8.21, p= <0.05) for at least 2.5 yrs. Shrimp abundance differed consistently between streams regardless of disturbance (F=264.48, p= <0.05). Species richness and species evenness were not affected. CCA models (F= 3.63, p=0.001, Inertia= 27.9%) suggest that shrimp assemblages were influenced primarily by a) stream identity and associated habitat attributes, b) hurricane disturbance, and c) post-hurricane periphyton biomass. Overall, our findings support our hypotheses and demonstrate that shrimp assemblages are well adapted to hurricane disturbances in our study tropical island streams.
- Storms
- Ecological dynamics
- Biodiversity
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Presenters/Authors
Jesús E. Gómez
(), University of Puerto Rico, jesuslobo06@gmail.com;
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Alonso Ramírez
(), North Carolina State University, alonso.ramirez@ncsu.edu;
ASHA DISCLOSURE:
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