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dc.contributor.advisorArsuffi, Thomas
dc.contributor.authorHolmes, Brian L. ( )
dc.date.accessioned2020-06-04T17:25:07Z
dc.date.available2020-06-04T17:25:07Z
dc.date.issued2004-12
dc.identifier.citationHolmes, B. L. (2004). Macroinvertebrate recolonization dynamics in response to drought and flood in three Austin, Texas, streams: Effects of urbanization (Unpublished thesis). Texas State University-San Marcos, San Marcos, Texas.
dc.identifier.urihttps://digital.library.txstate.edu/handle/10877/11127
dc.description.abstractImpervious cover of urbanized areas exaggerates the hydrologic disturbance (intensity of spates and duration of dry periods) common in central Texas. The objective of this study was to determine how benthic macroinvertebrate community composition, diversity, resilience, and recolonization in three Austin, Texas, streams that vary (3%, 16%, 55%) in degree of impervious cover are affected by such conditions. Benthic macroinvertebrates were quantified in 3 riffles in each of the 3 streams. Recovery from drought and flood were determined by: 1) 2 bi-weekly samples after flow resumed in September 2001, following the summer dry period and monthly sampling until flood disturbance; 2) 2 bi-weekly samples after flows receded in November 2001, and monthly sampling thereafter for four months. Hydrologic disturbance had a larger effect in the most urbanized watershed, where taxa richness and abundance were lowest and chironomids dominated. Greatest species richness occurred at the moderate and least disturbed streams, where Fallceon, Stenelmis, Argia and Chironomidae were dominant. Results indicated that rate of recolonization following disturbance was inversely related to degree of impervious cover. Impervious cover appears to interact with natural hydrologic disturbances in determining structure and function of the benthic community in urbanized streams.
dc.formatText
dc.format.extent67 pages
dc.format.medium1 file (.pdf)
dc.language.isoen_US
dc.subjectInvertebrates
dc.subjectUrbanization
dc.subjectRecolonization
dc.subjectDroughts
dc.subjectFloods
dc.titleMacroinvertebrate Recolonization Dynamics in Response to Drought and Flood in Three Austin, Texas, Streams: Effects of Urbanization
txstate.documenttypeThesis
dc.contributor.committeeMemberBonner, Timothy
dc.contributor.committeeMemberGroeger, Allan
dc.contributor.committeeMemberHornig, Evan
thesis.degree.departmentBiology
thesis.degree.grantorTexas State University--San Marcos
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
txstate.accessrestricted
txstate.departmentBiology


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