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PHYTOPLANKTON STATUS & TRENDS 2002 AND 2003. Richard V. Lacouture – ANSERC Harold G. Marshall – ODU Elgin Perry – Statistical Consultant Mike Lane - ODU. SUMMARY of ANNUAL PHYTOPLANKTON TRENDS. Bay & Lower River Stations
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PHYTOPLANKTON STATUS & TRENDS 2002 AND 2003 Richard V. Lacouture – ANSERC Harold G. Marshall – ODU Elgin Perry – Statistical Consultant Mike Lane - ODU
SUMMARY of ANNUAL PHYTOPLANKTON TRENDS • Bay & Lower River Stations • ICFIX increasing in Potomac, decreasing in VA tribs and mainstem Bay • PHYTOD increasing in all rivers except York & all mainstem Bay sites except CB6.1 • PHYTOC increasing in all rivers except Patapsco and VA mainstem Bay sites • DIATOMC increasing in all rivers and VA mainstem Bay sites • DINOC increasing in Choptank & Rappahannock and VA mainstem sites • CYANOC increasing in Potomac & all VA tribs and all mainstem Bay sites
SUMMARY of ANNUAL PHYTOPLANKTON TRENDS (cont) • Mid and Upper River Sites • ICFIX increasing in upper Potomac and decreasing in upper Patuxent and mid-James River site • PHYTOD increasing in Potomac and all VA tribs except mid-river James site; decreasing in upper Choptank • PHYTOC decreasing in upper Choptank and increasing in all VA mid & upper river sites • DIATOMC decreasing in Choptank & Patuxent and increasing in all VA mid & upper river sites • DINOC decreasing in mid-Rappahannock and increasing in upper Rappahannock River site • CYANOC increasing in upper Potomac and all VA trib sites except mid-James River site
SUMMARY of SPRING PHYTOPLANKTON IBI • Bay & Lower River Sites • 2002 Bay stations either Fair-Good or Fair except CB2.2 which was Fair-Bad and lower river sites were Fair-Bad except Rappahannock which was Fair-Good and York River which was Bad • 2003 Bay stations either Fair-Good, Fair or Fair-Bad and lower river sites were Fair except Choptank which was Fair-Bad and Patuxent River which was Bad • Generally, IBI scores were degraded in spring, 2003 compared to spring, 2002 except for in the very lower Bay region and those River mouth sites.
SUMMARY of SPRING PHYTOPLANKTON IBI • Mid & Upper River Sites • 2002 mid & upper river sites were mostly Fair-Bad with several sites Bad and one site in the upper York River was Fair. • 2003 mid & upper river sites were evenly mixed between Fair-Bad and Fair with two sites Fair-Good. • At all sites except for one, the spring, 2002 PIBI scores were lower than the spring, 2003 scores in the mid-upper reaches of the tributaries.
SUMMARY of SUMMER PHYTOPLANKTON IBI • Bay & Lower River Sites • 2002 with the exception of one station, the mainstem Bay was Fair-Good and the lower river stations were all Fair except Choptank which was Fair-Bad and Patapsco which was Bad. • 2003 the mainstem Bay station IBI scores were evenly distributed between Fair-Good, Fair and Fair-Bad and the lower river sites were all Fair except for Choptank which was Fair and Patuxent and Patapsco River sites which were Bad • Generally, PIBI scores decreased considerably in 2003 in mainstem sites and slightly in the tributary mouths except in the Patuxent which showed a marked decrease.
SUMMARY of SUMMER PHYTOPLANKTON IBI • Mid & Upper River Sites • 2002 mid & upper river sites were either Fair-Bad or Bad except mid- Potomac site which was Fair • 2003 mid & upper river sites were either Fair-Bad or Bad except mid- Patuxent and Potomac River sites which were Fair and upper York site which was Fair-Good • Generally, PIBI scores improved in summer, 2003 compared to summer, 2002, especially in the Patuxent and York Rivers. The exception were the sites in the Rappahannock River which were lower in 2003.
