The Arkansas River, the sixth largest in the United States, rises in the Collegiate Peaks of Colorado and discharges to the Mississippi River.
The river course is commonly...
Trinidad and Tobago moist forestsLast Updated on 2014-03-13 12:51:07This ecoregion differs greatly from the moist forests of the Windward islands to the north. Trinidad and Tobago were connected to the South American mainland as recently as 1,500 and 11,000 years, respectively and remain in close proximity. As a result, the forests of this ecoregion have a high species to area ratio and share many of the same flora and fauna with South America.
Trinidad and Tobago lack the high proportion of endemic species which is characteristic of many of the other Caribbean islands. Principal threats to the biodiversity in this ecoregion include habitat destruction mainly from expanding agricultural and industrial areas, uncontrolled exploitation, insufficient protected-area staffing, a need to update legislation for the establishment of protected areas, and a lack of public education concerning resource protection. Approximately 5% (24,748 hectares (ha)) of... More »
TepuisLast Updated on 2014-03-13 12:49:00The Guayana Highlands ecoregion in northern South America is host to an archipelago of isolated sandstone plateaus and dramatic summits atop nearly vertical escarpments.
More than 50 of the highest tabletop mountains are the remains of the ancient sandstone tableland overlying the even more ancient granitic Guayana Shield. They range from 1,000 to 3,000 meters (m) in elevation. And they are called tepuis (singular: tepui), a word from the Pemón Amerindians.The ecoregion is also referred to as Pantepuis.
Many tepuis are graced with dramatic waterfalls, the tallest of which (in fact, the tallest in the world) is Angel Falls dropping 979 meters.
These dramatic features in the landscape perforate an extensive matrix of highland savannas and rain forests across southern Venezuela mostly, with a few outliers in western Guyana, Suriname, and northern most Brazil. Hundreds of... More »
Talamancan montane forestsLast Updated on 2014-03-13 12:44:36
The Talamancan montane forests is an ecoregion situated along the mountainous spine of the Cordillera Talamanca within Costa Rica and Panama. These forests represent one of Central America’s most intactThe condition of an ecological habitat being an undisturbed or natural environment habitats.
The steep slopes, remoteness and relatively cool temperatures have limited the impact of agriculture and human development in most of this area.
This region provides habitat for considerable floral and faunal species diversity, many of which taxa are endemic. Over 30 percent of the ecoregion's flora, including over 10,000 vascular and 4000 non-vascular plant species, are endemic to this area, as are a number of fauna species. Nearly 75 percent of original forest cover remains intact, with forty percent protected by national and international parks.
However, the clearing of... More »
Napo moist forestsLast Updated on 2014-03-13 12:17:28This ecoregion belongs to the Amazon floristic province, an area of extreme diversity and endemism in species of both flora and fauna. This diversity results in some of the most species-rich forests in the world. For example, below 300 meters (m) elevation there are 138 orchid species that have been identified in Ecuador alone. Much of this ecoregion is not well known by scientists, possibly holding species currently undiscovered with the possibility of increasing worldwide biodiversity.
The Rio Napo region is situated at the western extreme of Amazonia where it hosts extraordinarily rich tropical moist forests. The ecoregion covers the northwestern portion of Peru, the Amazon region of Ecuador and the southwestern corner of Colombia’s Amazon. It is bounded on the west by the foothills of the Andes Mountains, on the south by the Marañon River in Peru, on the... More »
Cuban moist forestsLast Updated on 2014-03-13 12:00:48The Cuban moist forests originally held exceptionally distinctive insular flora and fauna, with many species, genera and families unique to its forests in the form of relict taxons. The island’s long-standing isolation has made it possible for these relict taxons to speciate, and many unique groups have also diversified. Many of the old lines that survive in these forests are extinct on the nearby continents. The rich flora and diverse fauna should be pointed out, particularly land snails. At present, these forests are mostly destroyed and fragmented. Expansion in the production of cacao, coffee and tobacco as well as mining and other human activities represent a serious threat in some areas.
Originally, this ecoregion was distributed in multiple patches of different sizes along the ranges and highlands of the island of Cuba (located between 19º50’N to... More »
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