EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/20/2019 | 9:45 AM - 10:00 AM | LOCAL AND REGIONAL DRIVERS OF TAXONOMIC HOMOGENIZATION IN STREAM DIATOMS, INSECTS, AND FISH ALONG A LAND USE GRADIENT | 251 AB
LOCAL AND REGIONAL DRIVERS OF TAXONOMIC HOMOGENIZATION IN STREAM DIATOMS, INSECTS, AND FISH ALONG A LAND USE GRADIENT
We used diatom, insect, and fish datasets from the US, Canada, and France to explore i) responses of beta-diversity to agriculture versus forest cover with respect to physicochemistry, ii) whether these responses were explained by altered local assembly versus regional species pool effects, and iii) if changes in local assembly were explained by the regional species abundance distribution (SAD) or intraspecific spatial aggregation. Agricultural eutrophication was associated with homogenization and greater inequality of the SAD across all groups, but the responses of beta- and gamma-diversity diverged across, and at times within, taxa. The contributions of local assembly versus the regional pool to beta-diversity remained generally insensitive to land use, but varied among groups with fish being more strongly controlled by local effects compared to diatoms and insects. Local assembly was attributed primarily to the regional SADs regardless of land cover, taxonomy, or dataset of origin. We conclude that agricultural eutrophication underlies beta-diversity loss in our streams, but not the relative importance of its local versus regional drivers. Body size and dispersal capacity were consistent predictors of the strength of local assembly, which was governed nearly exclusively by the SAD.
- Eutrophication
- Landuse
- Nutrients
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
William Budnick
(), University of Texas - Arlington, william.budnick@mavs.uta.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Thibault Leboucher
(), IRSTEA, thibault.leboucher@irstea.fr;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Jerome Belliard
(), IRSTEA, Jerome.belliard@irstea.fr;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Janne Soininen
(), Department of Geosciences and Geography, University of Helsinki, Finland , janne.soininen@helsinki.fi;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Isabelle Lavoie
(), National Institute of Scientific Research - Quebec, ilavoie.bio@gmail.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Katrina Pound
(), University of Texas - Arlington, katrina@uta.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Aurelien Jamoneau
(), IRSTEA, aurelien.jamoneau@irstea.fr;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Juliette Roseberry
(), IRSTEA, juliette.roseberry@irstea.fr;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Evelyne Tales
(), IRSTEA, evelyne.tales@irstea.fr;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Virpi Pajunen
(), University of Helsinki, virpi.pajunen@helsinki.fi;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Stephane Campeau
(), University of Quebec at Trois Rivieres, stephane.campeau@uqtr.ca;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Sophia Passy
(), University of Texas - Arlington, sophia.passy@uta.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -