Theses and Dissertations


Title: DISTRIBUTION AND ZOOGEOGRAPHY OF THE UNIONIDAE ( MOLLUSCA:BIVALVIA ) IN FOUR CREEK SYSTEMS IN EAST-CENTRAL ALABAMA

Name: Jenkinson, John J.

Degree: MS

Chair: Dendy, J.

Resides: SFAA

University: Auburn University

Location: Auburn

Date: 1973

Pages: 107

Keywords: unionidae, bivalves, alabama, creek, zoogeography, distribution

Abstract:

A distributional survey of the species of unionid

bivalves was conducted in four creek systems in east-central

Alabama. The streams involved were Saugahatchee and Uphapee

creeks in the Tallapoosa River system and Halawakee and

Uchee creeks in the Chattahoochee River system. Included

in this survey were 706 specimens collected and reported

upon by Hurd in 1971 and2016 specimens largely collected

in 1972 and 1973.

Twenty-seven species of unionids and the Asiatic

clam, Corbicula manilensis, were encountered in this study.

Five of the unionid species were restricted to the Chattahoochee

drainage creeks and eight unionids were restricted

to the Tallapoosa streams. Five unionids were considered

to be restricted to the Coastal Plain physiographic

province. Eight of the14 species common to both drainages

are suggested to have been distributed by Gulf coastal

interconnections of river mouths. Four of the species in

common are suggested to have been involved in a headwater

stream capture from the Etowah River by the Chattahoochee

River. The remaining two species may have been introduced

by a Coastal Plain connection of the Tallapoosa and

Chattahoochee rivers. The introduction of Corbicula manilensis is

suggested to have been accomplished by fishermen. Further

invasion by this species is suggested to be controlled by

current. An unusual case of suspected pollution, which is

apparently specific to unionids, is suggested to be introduced

at widely-spaced intervals or to contain low-level

concentrations of cations.

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