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The black sea urchin, also called a long-spined sea urchin, is the most abundant and important herbivore on the coral reefs of the western Atlantic and Caribbean basin. When the population of these sea urchins is at a healthy level, they are the main grazers which prevent algae overgrowth of the reef.
Diadema antillarum (black sea urchin)
A commercial dive boat for tourists who want to snorkel or dive the coral reef.
Dive boat
The degraded coral reefs of Mexico's east coast need clean, clear water to survive.
Coral reefs of Mexico are in jeopardy
Best management practices are needed from the ridge to the reef for healthy coastal zones and positive social wellbeing.
The coastal areas of Guatemala are impacted by…
The reduction of impacts and threats to the coastal ecosystem of Honduras benefits both humans and coral reefs.
The current features of and threats to the…
adult Hawai'i creeper
Hawai'i creeper (oreomystis mana)
Adult Hawaiian Crow
Hawaiian Crow or alala (Corvus hawaiiensis)
Hawai'ian songbird standing
Maui 'alauahio (paroreomyza montana)
Hymenachne was introduced into northern Queensland, Australia in the 1970s to use in ponded pastures. It escaped cultivation a few years after its release in 1988. It is spreading throughout the tropical wetlands of northern Australia and is most common in the coastal wetlands of northern Queensland and the Northern Territory.
Hymenachne amplexicaulis (Olive hymenachne)
Side view of a Painted Bunting with the right wing, and part of the stomach visible.
Passerina ciris (Painted Bunting)
Illustration of a Longleaf Pine tree.
Pinus palustris (Longleaf Pine)
A side view of a Seaside Sparrow.
Ammodramus maritimus (Seaside Sparrow)
A side view of a Nelson's Sparrow. Nelson's sparrow and the saltmarsh sparrow were considered to be a single species, the sharp-tailed sparrow; because of this it was briefly known as Nelson's sharp-tailed sparrow.
Ammodramus nelsoni (Nelson's Sparrow)
This map depicts land use in the Missouri River sub-basin, one of the five major sub-basins of the Mississippi River.
Land use map of the Missouri River basin
This map depicts land use in the Arkansas River and Red River sub-basin, one of the five major sub-basins of the Mississippi River.
Land use in the Arkansas River and Red River…
This diagram depicts potential indicators for the Arkansas River and Red River sub-basin, one of the five major sub-basins of the Mississippi River.
Potential indicators for the Arkansas River and…
A conceptual diagram shows the process between pressure, response, and state during a large storm.
Pressure response diagram
A side view of a three dimensional headdress colored yellow, red, and orange.
Hawaiian Royalty Headdress
A stylized red hibiscus flower with an orange style protruding from the center of the flower. The hibiscus is the state flower of Hawaii.
Hibiscus Flower
A stylized Hi'a Lehua flower shows the green leaves and base and long, upward reaching red petals.
Metrosideros Polymorpha (Hi'a Lehua)
Adult geese and juvenile goslings paddle around a river cove off Lake Michigan.
Canada geese (Branta canadensis) with goslings
Goose and duck hunters build these blinds on the calm waterways of Chesapeake Bay tributaries.
Duck blind
Tree roots are underminded by wave action and eventually succumb while the shoreline is eroded.
Eroded shoreline with tree snags
Mother duck and ducklings paddle around a river cove off Lake Michigan.
Female mallard (Anas platyrhynchos) and ducklings
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