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035 a| (Sirsi) o47028792;

035 a| (OCoLC)47028792;

043 a| n-us-nc;

049 a| EREE;

050 4 a| SB615.E87b| W35 2000;

100 1 a| Walker, William T.,e| author.;

245 10 a| Biotic and abiotic impacts of the invasive Myriophyllum spicatum l. in non-tidal oligohaline subtributaries of the Pamlico River /c| by William T. Walker, Jr.;

264 0 c| 2000.;

300 a| viii, 169 leaves :b| illustrations, maps ;c| 28 cm;

336 a| textb| txt2| rdacontent;

337 a| unmediatedb| n2| rdamedia;

338 a| volumeb| nc2| rdacarrier;

502 b| M.S.c| East Carolina Universityd| 2000;

500 a| Submitted to the faculty of the Department of Biology.;

500 a| Advisor: Terry L. West;

520 3 a| Species composition and spatial and temporal patterns of abundance of the submerged aquatic vegetation (SAV) community in two natural subtributaries (Jacobs Creek and Drinkwater Creek) and one man-made subtributary (Project Area 2) of the Pamlico River, North Carolina, USA were described by collecting approximately bimonthly biomass samples during 1998 and 1999, approximately 10 years after colonization by the exotic Myriophyllum spicatum L. The SAV community consisted ofM spicatum, and the native species Ruppia mar̕tima L. (widgeon grass), Zannichellia palustris L. (horned pondweed). Temporal patterns of total SAV biomass were similar between years with peaks occurring between March and June (100 -200 g/m2) in 1998 and 250 -600 g/m2 in 1999), and lows occurring between October and January (10-50 g/m2). Z palustris biomass was highest between January and March (60 - 80 g/m2), whereas biomass of R. mar̕tima (80 - 350 g/m ) and M. spicatum (200 - 500 g/m2) were highest between March and June. Native SAV species had the highest biomass in upstream areas of the natural creeks, while M spicatum in the downstream areas ofthe natural creeks and in both areas of Project Area 2. The effect of M. spicatum on the local dissolved oxygen (DO) regime was assessed by testing two hypotheses; 1 ) increasing biomass of M. spicatum results in increases in the diurnal variation of DO; and 2) increases in biomass of M. spicatum. results in a reduction of sub-canopy DO concentrations. Continuous water quality recording showed that an increase in the magnitude of diurnal variation of DO during March -June 1999, was independent of temperature and salinity, but showed a positive linear relationship with increasing M spicatum biomass (R2 = 1.00, P = 0.0001 ). In addition, water column profiles of DO during July 1999, showed 50 -90 % reductions in DO within the upper 50cm at sites with high SAV biomass (80-90 % M. spicatum), but showed no such reductions at sites with low SAV biomass. In situ cropping of M. spicatum in Project Area 2 resulted in a decrease in daily DO maxima and minima relative to an adjacent vegetated area. Lab experiments, monitoring DO levels within clear plexiglas cylindrical chambers containing various combinations of water, sediment and M. spicatum, under either light or dark conditions, indicated that the presence of M spicatum significantly increased oxygen consumption and production. These results suggest that naturally occurring populations of M spicatum can stimulate strong diurnal fluctuations in DO.;

504 a| Includes bibliographical references (leaves 111-118).;

650 0 a| Eurasian watermilfoilz| North Carolinaz| Pamlico River.;

650 0 a| Biotic communitiesz| North Carolinaz| Pamlico River.;

651 0 a| Pamlico River (N.C.);

650 7 a| Biotic communities.2| fast0| (OCoLC)fst00832828;

650 7 a| Eurasian watermilfoil.2| fast0| (OCoLC)fst00916577;

655 7 a| dissertations.2| aat0| (CStmoGRI)aatgf300028029;

655 7 a| Academic theses.2| fast0| (OCoLC)fst01726453;

655 7 a| Academic theses.2| lcgft;

655 7 a| Thèses et écrits académiques.2| rvmgf0| (CaQQLa)RVMGF-000001173;

710 2 a| East Carolina University.b| Department of Biology.;

856 41 z| Access via ScholarShipu| http://hdl.handle.net/10342/12898;

949 a| Click on web addressw| asish| joyner101;

949 a| Click on web addressw| asish| hsl111;

994 a| C0b| ERE;

596 a| 1 4;

998 a| 802855;

999 a| ASK AT SPECIAL COLLECTIONS DESKw| ASISc| 1i| 1342326d| 5/30/2001l| JSCJTHDm| JOYNERr| Ys| Yt| JSCJTHDu| 5/29/2001x| ETDz| JSPECCOLLo| .STAFF. 0;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 802855-3001l| JNETm| JOYNERr| Ys| Yt| JNE3ETDu| 3/16/2026x| ETDz| JERESOURCE;

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Biotic and abiotic impacts of the invasive Myriophyllum spicatum l. in non-tidal oligohaline subtributaries of the Pamlico River / by William T. Walker, Jr.

Author/creator	Walker, William T. author.
Other author	West, Terry L. (Terry Lynn), 1946- degree supervisor.
Other author	East Carolina University. Department of Biology.
Format	Theses and dissertations
Production	2000.
Description	viii, 169 leaves : illustrations, maps ; 28 cm
Supplemental Content	Access via ScholarShip
Subjects	Eurasian watermilfoil--North Carolina. --Pamlico River. Biotic communities--North Carolina. --Pamlico River. Pamlico River (N.C.)

Summary	Species composition and spatial and temporal patterns of abundance of the submerged aquatic vegetation (SAV) community in two natural subtributaries (Jacobs Creek and Drinkwater Creek) and one man-made subtributary (Project Area 2) of the Pamlico River, North Carolina, USA were described by collecting approximately bimonthly biomass samples during 1998 and 1999, approximately 10 years after colonization by the exotic Myriophyllum spicatum L. The SAV community consisted ofM spicatum, and the native species Ruppia mar̕tima L. (widgeon grass), Zannichellia palustris L. (horned pondweed). Temporal patterns of total SAV biomass were similar between years with peaks occurring between March and June (100 -200 g/m2) in 1998 and 250 -600 g/m2 in 1999), and lows occurring between October and January (10-50 g/m2). Z palustris biomass was highest between January and March (60 - 80 g/m2), whereas biomass of R. mar̕tima (80 - 350 g/m ) and M. spicatum (200 - 500 g/m2) were highest between March and June. Native SAV species had the highest biomass in upstream areas of the natural creeks, while M spicatum in the downstream areas ofthe natural creeks and in both areas of Project Area 2. The effect of M. spicatum on the local dissolved oxygen (DO) regime was assessed by testing two hypotheses; 1 ) increasing biomass of M. spicatum results in increases in the diurnal variation of DO; and 2) increases in biomass of M. spicatum. results in a reduction of sub-canopy DO concentrations. Continuous water quality recording showed that an increase in the magnitude of diurnal variation of DO during March -June 1999, was independent of temperature and salinity, but showed a positive linear relationship with increasing M spicatum biomass (R2 = 1.00, P = 0.0001 ). In addition, water column profiles of DO during July 1999, showed 50 -90 % reductions in DO within the upper 50cm at sites with high SAV biomass (80-90 % M. spicatum), but showed no such reductions at sites with low SAV biomass. In situ cropping of M. spicatum in Project Area 2 resulted in a decrease in daily DO maxima and minima relative to an adjacent vegetated area. Lab experiments, monitoring DO levels within clear plexiglas cylindrical chambers containing various combinations of water, sediment and M. spicatum, under either light or dark conditions, indicated that the presence of M spicatum significantly increased oxygen consumption and production. These results suggest that naturally occurring populations of M spicatum can stimulate strong diurnal fluctuations in DO.
General note	Submitted to the faculty of the Department of Biology.
General note	Advisor: Terry L. West
Dissertation note	M.S. East Carolina University 2000
Bibliography note	Includes bibliographical references (leaves 111-118).
Genre/form	dissertations.
Genre/form	Academic theses.
Genre/form	Academic theses.
Genre/form	Thèses et écrits académiques.

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Biotic and abiotic impacts of the invasive Myriophyllum spicatum l. in non-tidal oligohaline subtributaries of the Pamlico River / by William T. Walker, Jr.

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