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Celebrating 100 Years of Science! | 1925-2025

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The Indian River Lagoon on the east coast of Florida is suffering from polluted water, algal blooms, seagrass losses, and fish kills.
Conceptual diagram of the key features of and…
Unsustainable development and overfishing threaten Belize's coral reefs.
Belize coral reefs in jeopardy
A graph depicts the low oxygen levels and high ammonium concentrations in 2005 that caused large algae blooms. This put more stress on the ecosystem, resulting in the fish kill.
2005 Corsica River Fish Kill
A conceptual diagram illustrates the factors that can stimulate the growth of harmful algal blooms in brackish rivers and how these blooms can negatively impact other species within the ecosystem.
Algal Bloom Causation and Impacts in Brackish…
A graph shows the relationship between nitrogen levels and the brown tide cell concentrations in Maryland's Chesapeake and Coastal Bays.
Aureococcus Anophagefferens Blooms and Nitrogen…
A conceptual diagram illustrates the factors that cause brown tide algae blooms to occur in high magnitudes and what impacts these blooms have on the rest of the ecosystem.
Causes and Impacts of Brown Tide Algal Blooms
A graph depicts the trend of increasing prorocentrum minimum levels since 1970 in the Chesapeake Bay.
Prorocentrum Minimum Levels since 1970
A conceptual diagram illustrates the key features of the Chesapeake Bay watershed as well as the inputs that stimulate eutrophication and the symptoms of eutrophication.
The Causes and Effects of Eutrophication
A map depicts the general distribution of several of Maryland's common harmful algal blooms, in the Chesapeake and Coastal Bays.
The Distributions of Common Harmful Algal Blooms…
A conceptual diagram illustrates the main threats and key features of the Upper-Mississippi River Sub-Basin. Some of these threats include harmful algal blooms, power plants and urban centers. Diagram from
Main Threats and Key Features of the Upper…
As land use in the Chilika Lake area changes from forest to settlements and paddy agriculture sewage, and fertilizer and pesticides runoff increases into the Lake. This extra nutrient input results in algae blooms that float and sit on the bottom.
Chilika Lake Pollution Pressure
Illustration of Gyrodinium species
Gyrodinium species
An overabundance of algae occurs in ponded areas of Pipe Creek, where animal waste from geese washes into the creek. Increased nutrients from the waste causes algae to grow and bloom. Sandusky, Ohio.
Algae Overgrowth
An overabundance of algae occurs in ponded areas of Pipe Creek, where animal waste from geese washes into the creek. Increased nutrients from the waste causes algae to grow and bloom. Sandusky, Ohio.
Algae Overgrowth
Dune grasses in bloom along beaches by Charleston, South Carolina
Dune grasses in bloom
Tree canopy is just starting to fill in at the beginning of spring at Harper's Ferry.
Tree canopy in spring
Illustration of Banksia spp. (Banksia) in bloom
Banksia spp. (Banksia) with proteid roots
Conceptual diagram illustrating the long term restoration goals in the Chesapeake Bay, USA.
Chesapeake Bay restoration goals
Helicopter view of a dense green macroalgal bloom (either Ulva or Enteromorpha) in Buttonwoods Cove, Warwick, RI. This area receives significant failing septic system nutrients and is poorly flushed.
Macroalgal bloom in Buttonwoods, Warwick, RI
This conceptual diagram depicts the environmental factors that lead to harmful algal blooms in the Potomac River. The diagram compares ideal bloom conditions to poor bloom conditions.
Environmental conditions that lead to harmful…
Dense floating matts of the macroalgae Chaetomorpha spp. in the Maryland Coastal Bays
Floating algal matts
Large matts of the macroalgae Gracilaria spp were found in the Maryland Coastal Bays
Gracilaria bloom
Illustration of a mixed phytoplankton community
Mixed Phytoplankton Community Coloured
Conceptual diagram of processes in Temperate coastal regions developed as part of the LOICZ project to look at Land Ocean Interactions in the Coastal Zone
Temperate Coastal Ecosystem Summary
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