The State of Coral Reef Ecosystems of Guam the State of Coral Reef Ecosystems of Guam
The State of Coral Reef Ecosystems of Guam The State of Coral Reef Ecosystems of Guam David Burdick1, Valerie Brown2,4, Jacob Asher3,4, Mike Gawel5, Lee Goldman6, Amy Hall3,4, Jean Kenyon3,4, Trina Leberer7, Emily Lundblad3,4, Jenny McIlwain6, Joyce Miller3,4, Dwayne Minton8, Marc Nadon3,4, Nick Pioppi6, Laurie Raymundo6, Benjamin Richards3,4, Robert Schroeder3,4, Peter Schupp6, Ellen Smith3,4 and Brian Zgliczynski3 Guam INTRODUCTION AND SETTING This report provides an assessment of the status of the coral reef ecosystems of Guam between 2004 and 2007. The find- ings of various monitoring activities, assessments, and stand-alone investigations conducted by local and federal agen- cies, educational/research institutions, and government contractors since 2004 were synthesized to obtain an updated, holistic view of the status of Guam’s reefs. Guam, a U.S. territory located at 13°28’ N, 144°45’ E, is the southernmost island in the Mariana Archipelago (Figure 15.1). It is the largest island in Micronesia, with a land mass of 560 km2, and has a maximum elevation of approximately 405 m and a total shoreline length of 244 km. Guam is a volcanic island completely surrounded by a coralline limestone plateau. The relatively flat northern half of the island, which is primarily comprised of uplifted limestone, is the site of the island’s principle aquifer. The southern half of the island has more topographic relief and is comprised mainly of volcanic rock, with areas of highly erodible lateritic soils. The hilly topography creates numerous watersheds drained by 96 rivers (Best and Davidson, 1981).
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