{"id":31389,"date":"2019-10-03T08:32:29","date_gmt":"2019-10-02T22:32:29","guid":{"rendered":"https:\/\/www.guampedia.com\/?p=31389"},"modified":"2026-09-21T21:00:58","modified_gmt":"2026-09-21T11:00:58","slug":"limestone-forests-of-guam","status":"publish","type":"post","link":"https:\/\/www.guampedia.com\/limestone-forests-of-guam\/","title":{"rendered":"Limestone Forests of Guam"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"31389\" class=\"elementor elementor-31389\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3d9c589d elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"3d9c589d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-18245efc\" data-id=\"18245efc\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5807fab7 elementor-widget elementor-widget-spacer\" data-id=\"5807fab7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3efaa070 elementor-widget elementor-widget-heading\" data-id=\"3efaa070\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Limestone Forests of Guam<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1bf76a5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1bf76a5\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-16 elementor-top-column elementor-element elementor-element-faca75e\" data-id=\"faca75e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-858e284\" data-id=\"858e284\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f058ed2 elementor-widget elementor-widget-ucaddon_uc_grid_image_theme\" data-id=\"f058ed2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"ucaddon_uc_grid_image_theme.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n<!-- start Grid Gallery -->\n\t\t<link id='font-awesome-css' href='https:\/\/www.guampedia.com\/wp-content\/plugins\/unlimited-elements-for-elementor-premium\/assets_libraries\/font-awesome6\/fontawesome-all.min.css' type='text\/css' rel='stylesheet' >\n\t\t<link id='font-awesome-4-shim-css' href='https:\/\/www.guampedia.com\/wp-content\/plugins\/unlimited-elements-for-elementor-premium\/assets_libraries\/font-awesome6\/fontawesome-v4-shims.min.css' type='text\/css' rel='stylesheet' >\n\t\t<link id='unitegallery-css' href='https:\/\/www.guampedia.com\/wp-content\/plugins\/unlimited-elements-for-elementor-premium\/assets_libraries\/unitegallery\/css\/unite-gallery.css' type='text\/css' rel='stylesheet' >\n\n<style>\/* widget: Grid Gallery *\/\n\n#uc_uc_grid_image_theme_elementor_f058ed2{\n  min-height: 1px;\n  margin:0 auto;\n      display: none;\n  }\n\n.elementor-widget-ucaddon_uc_grid_image_theme{\n  width:100%;\n}\n\n\/* protections *\/\n#uc_uc_grid_image_theme_elementor_f058ed2 .ug-zoompanel.ug-skin-default .ug-zoompanel-button:first-child{\n  margin-top: 0;\n}\n\/* end rotections *\/\n\n<\/style>\n\n<div id=\"uc_uc_grid_image_theme_elementor_f058ed2\" class=\"uc-items-wrapper  \"  data-remote-type=\"gallery\" data-custom-sethtml=\"true\" >\n  \n<img decoding=\"async\" alt=\"Limestone Forests of Guam Figure 1\"\n   src=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Figure-1-Shell-Fossil_1024-150x150.webp\"\n    data-image=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Figure-1-Shell-Fossil_1024.webp\"\n    data-title=\"Limestone Forests of Guam Figure 1\"\n    data-description=\"Limestone Forests of Guam Figure 1. A shell fossil along a hiking trail at Guam Community College. Photo credit: Monica Salas.\">\n\n<img decoding=\"async\" alt=\"Limestone Forests of Guam Figure 2\"\n   src=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Limestone-Forest-Featured-Image-150x150.webp\"\n    data-image=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Limestone-Forest-Featured-Image-768x402.webp\"\n    data-title=\"Limestone Forests of Guam Figure 2\"\n    data-description=\"Limestone Forests of Guam Figure 2. Karst terrain in a limestone forest. Photo credit: Gerard Chargualaf.\nLimestone Forest-Featured Image\">\n\n<img decoding=\"async\" alt=\"Limestone Forests of Guam Figure 3\"\n   src=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Figure-3-Nunu-Tree_1024-150x150.webp\"\n    data-image=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Figure-3-Nunu-Tree_1024.webp\"\n    data-title=\"Limestone Forests of Guam Figure 3\"\n    data-description=\"Limestone Forests of Guam Figure 3. A nunu tree in Guam&#039;s limestone forest. Photo credit: Monica Salas \">\n\n<img decoding=\"async\" alt=\"Limestone Forests of Guam Figure 4\"\n   src=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Figure-4-Fallen-Tree_1024-150x150.webp\"\n    data-image=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Figure-4-Fallen-Tree_1024-768x512.webp\"\n    data-title=\"Limestone Forests of Guam Figure 4\"\n    data-description=\"Limestone Forests of Guam Figure 4. A fallen tree affected from heavy winds in a limestone forest.\r\nPhoto credit: Gerard Chargualaf.\">\n\n<\/div>\n<!-- end Grid Gallery -->\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-16 elementor-top-column elementor-element elementor-element-c84e2b9\" data-id=\"c84e2b9\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6430a9b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6430a9b\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-007a63c\" 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aria-hidden=\"true\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_print\" role=\"button\" tabindex=\"0\" aria-label=\"Share on print\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<i class=\"fas fa-print\" aria-hidden=\"true\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_email\" role=\"button\" tabindex=\"0\" aria-label=\"Share on email\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<i class=\"fas fa-envelope\" aria-hidden=\"true\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-3c5ad8b8\" data-id=\"3c5ad8b8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-448f6eb4 elementor-widget elementor-widget-heading\" data-id=\"448f6eb4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is a limestone forest?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f6ef40e elementor-widget elementor-widget-text-editor\" data-id=\"4f6ef40e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A limestone forest is a unique ecosystem consisting of a limestone ground upon which plants and animals exist. Limestone soils are generally very shallow, with a pH of 7 to 8 (neutral to mildly alkaline). They&#8217;re also nutrient-poor, high in calcium carbonate (CaCO\u2083), and very well-drained. The unique physical and chemical properties of the soil influence the types of plants that can thrive in this habitat.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph {\"align\":\"left\"} --><\/p>\n<p class=\"has-text-align-left\">Other features of limestone forests are sinkholes and caves, which are home to animals such as crabs and swiftlets. A few species are endemic to this type of forest, and the forest is essential to their survival. On Guam, limestone forests occupy 33 percent of the land. They make up 70 percent (approximately 18,098 hectares) of the island&#8217;s forests, and are found primarily in the northern half of Guam.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2a851363 elementor-widget elementor-widget-heading\" data-id=\"2a851363\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How was Guam's limestone formed?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-590ac586 elementor-widget elementor-widget-text-editor\" data-id=\"590ac586\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Volcanic eruptions beginning 56 million years ago formed the southern part of Guam. One volcano formed what would become the northern part of Guam. Once volcanic activity ceased, coral reefs grew in the shallow waters around the volcanic peaks. Gradually, the corals and other hard-bodied marine organisms deposited calcium carbonate skeletons, which accumulated, extending the coral reefs around the island. As these sea creatures died, their skeletons and shells accumulated; erosive processes including wave action and grinding activities of animals that eat corals, shells and algae. The organic matter, or tissue, found in the ingested plants and animals, is digested, while the limestone material from the skeletons and shells are excreted, forming sand. The sand was deposited as sediment, which was then compacted and cemented together to make limestone. Limestone rock has vertical cracks called <em>joints<\/em> and horizontal cracks (cemented layers) called <em>bedding planes<\/em>. Sometimes whole animals or shells get trapped within the bedding planes, creating a fossil record of organisms that existed during the period of formation (Figure 1).<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Movement of the Marianas Plate resulted in the uplifting, or vertical elevation, of the reef. Each time the reef uplifted, the cycle of limestone formation began again in the shallow waters. This cycle of reef building and uplifting formed the northern plateau of Guam, as well as the high cliffs on the eastern coast. There are also deposits of old limestone formed after the early volcanic eruptions in the southern part of Guam, such as in <a href=\"https:\/\/www.guampedia.com\/agat-hagat\/\" target=\"_blank\" rel=\"noopener\">H\u00e5gat<\/a> and<a href=\"https:\/\/www.guampedia.com\/santa-rita\/\" target=\"_blank\" rel=\"noopener\"> S\u00e5nta Rita-Sumai<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-75324ff0 elementor-widget elementor-widget-heading\" data-id=\"75324ff0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Karstification: Thousands of years in the making<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-455ab670 elementor-widget elementor-widget-text-editor\" data-id=\"455ab670\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Once the limestone is formed, it weathers. Rainwater and carbon dioxide from the air and soil mix to form a weak acid. As the slightly acidic water percolates through the joints and bedding planes, it dissolves the calcium carbonate in a process called <em>karstification<\/em>. The water continues carving its way to sea level, creating an aquifer of fresh water<strong>.<\/strong> The landscape produced by this process over thousands of years is called karst, which is characterized by fissures, caves, sink holes, rimstone pools, and jagged terrain. Figure 2 shows an example of <em>karst<\/em> terrain in the limestone forest. The karst features provide the habitat for endemic species living in limestone forests.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-87d4a34 elementor-widget elementor-widget-heading\" data-id=\"87d4a34\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Different species in the limestone forests<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b018271 elementor-widget elementor-widget-text-editor\" data-id=\"b018271\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Limestone forests provide habitat to some of the island\u2019s native endangered species. Table 1 lists the common tree species found in the limestone forests. Native flora and fauna are well adapted to the limestone environment. Figure 3 shows <em>Ficus prolixa<\/em>, or <em>nunu<\/em>, a tall common native tree species adapted to the shallow limestone soil. The karst features provide homes for fruit bats, or fanihi (which are endangered animals on Guam) in caves, and coconut crabs, or ayuyu in the crevices. The larvae of the eight-spot butterfly (<em>Hypolimnas octocula mariannensis<\/em>), another endangered species, believed to only exist on Guam, feed exclusively on the herbaceous shrub species, <em>Elatostema calcareum<\/em> (an understory plant) and <em>Procris pedunculata<\/em> (an epiphyte). These two host plants are only found on karst substrates, limiting the butterfly&#8217;s range. Because of their adaptation to the limestone karst environment, many endemic species are not able to survive outside this ecosystem.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0c1db07 elementor-widget elementor-widget-heading\" data-id=\"0c1db07\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Table 1<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-da94889 elementor-widget elementor-widget-text-editor\" data-id=\"da94889\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Table 1.<\/strong> Common and endangered tree species found in limestone forests.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5cf825c elementor-widget elementor-widget-text-editor\" data-id=\"5cf825c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<figure class=\"wp-block-table\">\n<table>\n<thead>\n<tr>\n<th>Scientific name<\/th>\n<th>CHamoru name<\/th>\n<th>Status<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><em>Aglaia mariannensis<\/em><\/td>\n<td>Mapu\u00f1ao, Mapunyao<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Cocos nucifera<\/em><\/td>\n<td>Niyok<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Cycas micronesica<\/em><\/td>\n<td>Fadang<\/td>\n<td>native tree <br \/>(endangered)<\/td>\n<\/tr>\n<tr>\n<td><em>Cynometra ramiflora<\/em><\/td>\n<td>Gulos<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Elatostema calcareum<\/em><\/td>\n<td>Tupun ayuyu<\/td>\n<td>herbaceous shrub<\/td>\n<\/tr>\n<tr>\n<td><em>Eugenia reinwardtiana<\/em><\/td>\n<td>A\u2019abang<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Ficus prolixa<\/em><\/td>\n<td>Nunu<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Guamia mariannae<\/em><\/td>\n<td>Paipai<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Intsia bijuga<\/em><\/td>\n<td>Ifit<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Ochrosia mariannensis<\/em><\/td>\n<td>Langiti<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Ochrosia oppositifolia<\/em><\/td>\n<td>Fagot<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Pandanus tectorius<\/em><\/td>\n<td>Kaffo\u2019<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Pisonia grandis<\/em><\/td>\n<td>Umumu<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Premna serratifolia<\/em><\/td>\n<td>\u00c5hgao<\/td>\n<td>common native tree<\/td>\n<\/tr>\n<tr>\n<td><em>Procris pedunculata<\/em><\/td>\n<td>N\/A<\/td>\n<td>herbaceous shrub<\/td>\n<\/tr>\n<tr>\n<td><em>Serianthes nelsonii<\/em><\/td>\n<td>H\u00e5yun l\u00e5gu, Trongkon gu\u00e5fi<\/td>\n<td>endemic tree (endangered)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76e8f98 elementor-widget elementor-widget-heading\" data-id=\"76e8f98\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Threats to Guam's limestone forests<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b76b065 elementor-widget elementor-widget-text-editor\" data-id=\"b76b065\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Guam\u2019s limestone forests face several challenges today. Because limestone soils are generally shallow, trees are not deeply rooted and are prone to knocked down by wind, mainly during storms and typhoons. Figure 4 shows an example of a fallen tree in the limestone forest. Another challenge \u2013 especially for the endemic and endangered species adapted to the limestone habitat \u2013 is human developments, which are diminishing habitats for native flora and fauna.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>One example of human developments on limestone forest is the construction related to the US military buildup, specifically the relocation of the US Marines from Okinawa to Guam. In addition to building a base to house Marines and their families, the buildup includes a firing range on the Northwest Field of Andersen Air Force Base. Approximately 700 acres are allocated for the entire live-fire training range complex. Of those 700 acres, 315 are for the actual ranges. Of that 315, 89 acres lie in native limestone forest.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Invasive species such as pigs and deer (which are ungulates, or hoofed mammals) disrupt the soil by grazing heavily and trampling on new seedlings. This prevents new plants from growing.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>According to botanist William E. Safford, ungulates were introduced to Guam by Spanish colonists in the 1700s. They were originally domesticated but, over time, became feral. Hunters help reduce feral ungulate populations, and methods such as using high-quality fencing in forest conservation plots keep ungulates from damaging priority areas of the forests. A good example of this can be seen around the mother tree of the endangered species <a href=\"https:\/\/www.guampedia.com\/guam-tree-hayun-lagu\/\" target=\"_blank\" rel=\"noopener\">h\u00e5yan l\u00e5gu<\/a> (<em>Serianthes nelsonii<\/em>), which is the last adult tree of its kind on Guam. A high-quality fence surrounds the tree to prevent ungulate damage.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Another invasive species, the <a href=\"https:\/\/www.guampedia.com\/brown-treesnake\/\" target=\"_blank\" rel=\"noopener\">brown treesnake<\/a> <em>(Boiga irregularis)<\/em>, has severely harmed the seed dispersal of Guam forest species by decimating native bird populations. Accidentally introduced to Guam in the mid-1940s, the brown tree snake spread rapidly throughout the island because it had no natural predators. The brown treesnake is considered largely responsible for the extinction of 12 species of endemic birds, though other factors, such as habitat destruction, were also instrumental. Research on the brown treesnake on Guam has made the island one of the forerunners for invasive species research, but the snake remains on Guam, preventing bird species from recovering.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>The effects of the brown treesnake are more severe than ungulate damage because of the importance of the role that birds play in tropical islands. Many tree species in the tropics rely on birds to spread their seeds. They eat fleshy or semi-fleshy fruit from trees and excrete undigested seeds onto the forest floor, usually away from a parent tree. Spreading seeds of a species away from where it is usually established may provide advantages for seeds to forest new areas, where there are generally fewer pathogens and predators, and less competition for light, water, and nutrients. All these threats leave our limestone forests in a very vulnerable state.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-066fe06 elementor-widget elementor-widget-heading\" data-id=\"066fe06\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Managing the invasive, protecting the endangered<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d0d7b5e elementor-widget elementor-widget-text-editor\" data-id=\"d0d7b5e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Because the forests are under threat, many people are working to help them.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Among the groups involved are:<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<ul>\n<li>US Department of Defense<\/li>\n<li>US Fish and Wildlife Service<\/li>\n<li>US Department of Agriculture Animal and Plant Health Inspection Services (APHIS)<\/li>\n<li>University of Guam<\/li>\n<li>National Parks Service<\/li>\n<li>Local environmental firms<\/li>\n<\/ul>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>They work to manage and eradicate invasive species and to conserve and propagate endangered species with help from laws such as the US Endangered Species Act, which aims to protect and recover threatened or endangered species.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>For example, the US Department of Agriculture APHIS Wildlife Services coordinates efforts to control and prevent the spread of the brown tree snake onto nearby islands. Among other methods, it does so by trapping snakes in high-risk areas and by inspecting cargo.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>On the conservation side, projects such as forestry surveys by various local environmental firms and the Guam Plant Extinction Prevention Program focus on assessing and monitoring the health of Guam\u2019s forests.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>Ideally, if the brown tree snake can be controlled or eradicated, reintroducing native bird species to Guam could be one way to help improve the health of the limestone forests. Additionally, eradicating feral ungulates would reduce forest destruction and allow new plant growth to establish with less difficulty.<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>In the &#8220;<a href=\"https:\/\/issuu.com\/guampedia\/docs\/limestone_issuu\" target=\"_blank\" rel=\"noopener\">Limestone Forest<\/a>&#8221; volume of the <a href=\"https:\/\/www.guampedia.com\/education\/life-on-guam\/\" target=\"_blank\" rel=\"noopener\"><em>Life On Guam<\/em><\/a> school textbook series, published in 1976, author Larry Behrens posed two questions: How much of our natural environment should we give up in the name of progress and how much of our natural environment must we keep in order to maintain an acceptable standard of living?<\/p>\n<p><!-- \/wp:paragraph --><!-- wp:paragraph --><\/p>\n<p>These questions are still relevant today. We must continue to raise awareness of the threats to the limestone forests \u2013 from invasive species to the effects of human developments on the natural environment \u2013 to preserve the limestone ecosystems and the endemic and endangered species.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5786a92 elementor-widget elementor-widget-heading\" data-id=\"5786a92\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Places to visit on Guam to see karst features<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5ff914b elementor-widget elementor-widget-text-editor\" data-id=\"5ff914b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul>\n<li><em>Sinkholes:<\/em> Devil&#8217;s Punchbowl by Hilton Hotel, Ipao Point, <a href=\"https:\/\/www.guampedia.com\/tamuning\/\" target=\"_blank\" rel=\"noopener\">Tumon<\/a><\/li>\n<li><em>Caves\/Aquifer:<\/em> Marbo Cave or P\u00e5gat Cave, off Rt. 15, <a href=\"https:\/\/www.guampedia.com\/mangilao\/\" target=\"_blank\" rel=\"noopener\">Mangilao<\/a><\/li>\n<li><em>Wave cutting from geological uplifting:<\/em> Two Lover&#8217;s Point cliff face, Tumon<\/li>\n<li><em>Karst Terrain:<\/em> Hiking Trail, Guam Community College, Mangilao<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d1ce69b elementor-widget elementor-widget-heading\" data-id=\"d1ce69b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">About the authors<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-d4706c7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d4706c7\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-4fec8e1\" data-id=\"4fec8e1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ba467f5 elementor-widget elementor-widget-image\" data-id=\"ba467f5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Gerard-Chargualaf-Portrait.webp\" class=\"attachment-medium size-medium wp-image-46155\" alt=\"Raymond &quot;Gerard&quot; Chargualaf is a co-author for the UOG Science entry Limestone Forests of Guam, 2019.\" srcset=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Gerard-Chargualaf-Portrait.webp 300w, https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Gerard-Chargualaf-Portrait-150x150.webp 150w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-f033214\" data-id=\"f033214\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-13722a6 elementor-widget elementor-widget-text-editor\" data-id=\"13722a6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Raymond &#8220;Gerard&#8221; Chargualaf is a graduate student in the Sustainable Agriculture, Food, and Natural Resources (SAFNR) graduate program at the University of Guam. He works with the Guam Plant Extinction Prevention Program.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-2690989 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2690989\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-6f0f59f\" data-id=\"6f0f59f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ce323a9 elementor-widget elementor-widget-image\" data-id=\"ce323a9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Monica-Salas-Portrait.webp\" class=\"attachment-medium size-medium wp-image-46158\" alt=\"Monica Salas is a co-author for the UOG Science entry Limestone Forests of Guam, 2019.\" srcset=\"https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Monica-Salas-Portrait.webp 300w, https:\/\/www.guampedia.com\/wp-content\/uploads\/2019\/10\/Monica-Salas-Portrait-150x150.webp 150w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-1a69c8d\" data-id=\"1a69c8d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c2b2cf6 elementor-widget elementor-widget-text-editor\" data-id=\"c2b2cf6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Monica Salas graduated with a BA in biology from the University of Guam in 1991 and was a graduate student in the MS biology program. She was a Criminalist at the Guam Police Department Crime Lab.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-efd801e elementor-widget elementor-widget-text-editor\" data-id=\"efd801e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Editor&#8217;s note:<\/strong> These authors were beginning graduate students in 2019, taking a course in scientific writing at the University of Guam. This article was assigned to provide the students with practice in communicating science to non-scientists. The students chose the topic, which is related either to their thesis project or work experience. The instructor in the course is Dr. Laurie Raymundo, a UOG Marine Laboratory faculty member.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b82c274 elementor-widget elementor-widget-spacer\" data-id=\"b82c274\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-94e4283 elementor-widget elementor-widget-heading\" data-id=\"94e4283\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">For further reading<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-669bb55d elementor-widget elementor-widget-text-editor\" data-id=\"669bb55d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<!-- wp:heading --><!-- \/wp:paragraph --><!-- wp:heading --><!-- \/wp:heading --><!-- wp:paragraph --><!-- \/wp:paragraph --><!-- wp:heading --><!-- \/wp:heading --><!-- wp:paragraph --><!-- \/wp:paragraph --><!-- wp:heading --><!-- \/wp:heading --><!-- wp:paragraph --><!-- \/wp:paragraph --><!-- wp:paragraph --><!-- \/wp:paragraph --><!-- wp:table {\"hasFixedLayout\":false} --><!-- \/wp:heading --><!-- wp:paragraph --><!-- \/wp:paragraph --><!-- wp:heading --><!-- \/wp:heading --><!-- wp:paragraph --><!-- \/wp:paragraph --><!-- wp:paragraph --><!-- \/wp:paragraph --><!-- wp:paragraph --><!-- \/wp:paragraph --><!-- wp:paragraph --><!-- \/wp:paragraph --><!-- wp:heading --><!-- \/wp:heading --><!-- wp:paragraph --><!-- \/wp:paragraph --><!-- wp:paragraph {\"style\":{\"elements\":{\"link\":{\"color\":{\"text\":\"var:preset|color|black\"}}}},\"textColor\":\"black\"} --><!-- \/wp:paragraph --><!-- wp:heading --><!-- \/wp:heading --><!-- wp:paragraph -->\n<p>Behrens, Lawrence. <a href=\"https:\/\/issuu.com\/guampedia\/docs\/limestone_issuu\" target=\"_blank\" rel=\"noopener\"><em>Life on Guam: Limestone Forest<\/em><\/a>. Hag\u00e5t\u00f1a: Guam Department of Education, 1976.<\/p>\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n<p>Morton, John M., Fred A. Amidon, and Lena R. Quinata. \u201cStructure of a Limestone Forest on Northern Guam.\u201d <em>Micronesica<\/em> 32, no. 2 (2000): 229-244.<\/p>\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n<p>Ossola, Alexandra. \u201cGuam\u2019s Ecological Fate is in the Hands of the US Military.\u201d <em>National Geographic<\/em>, 27 December 2018.<\/p>\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n<p>Raulerson, Lynn, and Agnes F. Rinehart. <em>Trees and Shrubs of the Mariana Islands<\/em>. Saipan: Commonwealth of the Northern Mariana Islands Coastal Resources Management, 1991.<\/p>\n<!-- \/wp:paragraph --><!-- wp:paragraph -->\n<p>US Department of Agriculture Forest Service. <a href=\"https:\/\/www.fs.usda.gov\/treesearch\/pubs\/7542\" target=\"_blank\" rel=\"noopener\"><em>Guam\u2019s Forest Resources, 2002<\/em><\/a>. By Joseph A. Donnegan, Sarah L. Butler, Walter Grabowiecki, Bruce A. Hiserote, and David Limtiaco. Resource Bulletin PNW-RB-243. Portland: PNW, 2004.<\/p>\n<!-- \/wp:paragraph --><!-- wp:paragraph --><!-- \/wp:paragraph -->\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b06dd27 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b06dd27\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-bfc0496\" data-id=\"bfc0496\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-36e247b elementor-widget elementor-widget-spacer\" data-id=\"36e247b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>What is a limestone forest? A limestone forest is a unique ecosystem consisting of a limestone ground upon which plants and animals exist. Limestone soils are generally very shallow, with a pH of 7 to 8 (neutral to mildly alkaline).<\/p>\n","protected":false},"author":29,"featured_media":44909,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"page_builder":"","footnotes":""},"categories":[124,452,23],"tags":[573],"class_list":["post-31389","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-land","category-natural-environment","category-natural-resources","tag-limestone-forests-of-guam"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"A limestone forest is a unique ecosystem consisting of a limestone ground upon which plants and animals exist. 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