Marsh Landing Lake Overview By: Christina Kennedy Account - - PowerPoint PPT Presentation

Marsh Landing – Lake Overview

By: Christina Kennedy Account Representative/Aquatic Biologist Solitude Lake Management

About Me

• Aquatic Biologist/Account Representative
• Background information:

– I hold a B.S. degree in Zoology with a focus on Marine Biology and a specializationin marine ecosystem management. – I graduated from Michigan State University

• Experience:

– Lab Manager Mote Marine Lab

• Researched the effects of ocean acidification on calcifying organisms.

– Lab Manager at FGCU

• Conducted seagrass research in the Caloosahatchee Estuary

and Matlacha Pass.

– Solitude Lake Management

• 5 year's experience.

What is a Storm-Water system?

• A storm water system is a tool for managing runoff from rainfall

and irrigation

• A storm water pond is specifically designed to help prevent

flooding and remove pollutants from the water before it can drain into the groundwater or into streams, rivers, lakes, wetlands, estuaries, or the Gulf. Man-made “lakes” VS. The Great Lakes

Responsibility for Storm- Water Ponds

• The responsibility for permitting falls to SFWMD/County.
• The upkeep of these systems are the responsibility of:

– Homeowners, Condominium owners, or Property Owners Associationetc.

• You can find Marsh Landing permits at this link:
• http://my.sfwmd.gov/ePermitting/MainPage.do

– Click on Application/Permit (located on the left hand-side.) – Under Project Name type in Marsh Landing.

Services SOLitude provides for Marsh Landing

• Contractual Obligations:

 1 treatment visit a month, 12 visits total.

– Algae and Aquatic Weed Control – Shoreline Grass Control to the Water’s Edge – Maintenance Reporting from tech – Debris Removal – Bacteria Treatment last quarter of 2019

Examples

• Aquatic Plants:

– Hydrilla, Bladderwort, Chara, Southern Naiad, IllinoisPondweed…

Examples

Examples

• Shoreline Grasses & Brush:

– Torpedograss, Mikania, Broom Grass, Pennywort,Alligatorweed…

Other Services SOLitude Provides

• Lake Assessments
• Alum Treatments
• Bottom Aeration/Fountain Maintenance
• Shoreline Littoral Plantings
• Fish Stocking
• Midge Fly Control
• And Many More!

Muck Assessment

• Sample Date: June 13th2018
• Services performed

– Nutrient analysis.

• Total Phosphorus, Total Nitrogen, Total Ammonia

– Clarity

• Secchi depth

– Water column profile

• DO, and temperature with depth

– Bathymetric Mapping – Core and muck depth – Percent Organic Content – Particulate Organic Matter

Standard Assessment

• Sample Date: November 6th 2019
• Services performed

– Nutrient analysis.

• Total Phosphorus, Total Nitrogen, Total Ammonia

– Clarity

• Secchi depth

– Water column profile

• DO, and temperature with depth

2018

2019

2018

2019

2018

2019

2018

2019

2018

2019

2018

2019

Assessments at a Glance

• Reduction in the nitrogen levels across the board and are at or

below the desired range.

• Little change observed in phosphorus levels however total

phospohorus levels were already at or beloew the desired range.

• Ammonia levels did not improve much over the last year,

ammonia concentrations are usually associated with organic build up which we know is an issue at Marsh Landing.

• Bacteria was recommended to help reduce ammonia levels further.
• Low DO and statification issues were fixed in all ponds where

aeration was installed.

Solutions

Triploid Grass Carp

• TGC are sterile, they will not reproduce.
• TGC control aquatic vegetation NOT algae.
• Recommended stocking size is 10-12 inches.
• TGC are typically stocked in the winter.
• Marsh Landing would be responsible for the cost to fabricate and

install a fish barrier, per FWC.

• Approval of permits by FWC can take several months.
• Help reduce chemical applications and cost.
• Continuous control of nuisance aquatic plants.

On-Going Water Quality Analysis and bacteria

• Though the lakes do show improved water quality the ammonia

levels are still concerning. It is recommended that a second dose

• f bacteria be applied in the spring of 2020, and Marsh Landing

may want to consider adding bacteria as part of the monthly maintenance.

• It is also recommened to sample the lakes again after a second

bacteria application to see if the ammonia levels have been

• reduced. High ammonia levels are toxic to fish and may impair

fish populations.

• Tracking the nutrinets can help determine if data collected

represents an trend or a random spike or reduction.

Shoreline Plantings

• The lake banks at Marsh Landing are shallow and wide and make

excellent grwoing conditions for algae and aquatic weeds.

• Flowering littoral plants could help to occupy and shade these
• ptimal areas reducing the ability for algae and aqautic weeds to

grow.

Q & A