Campeche is a relatively flat area of Mexico with of shoreline on the
Gulf of Mexico. Most of the surface is of sedimentary rock, much of it of marine origin. The area with the highest elevations is near the borders with Guatemala and Quintana Roo. Notable elevations include Cerro Champerico, Cerro los Chinos, Cerro El Ramonal, Cerro El Doce, and Cerro El Gavilán. However, these hills are separated by large expanses of lower flat land. In the south of the municipality of Champotón begin a series of rolling hills known as the Sierra Alta or Puuc, which extend northeast to
Bolonchen and then into the state of Yucatán. These have only an average altitude of between with some reaching . Other areas of these rolling hills lie near the city of Campeche, the main ones known as Maxtum, Boxol and El Morro. Another set is called the Sierra Seybaplaya in the center of the state. Rainforest areas subdivide into a number of types which include perennial tall tree rainforest, semi perennial tall tree rainforest, deciduous medium height tree rainforest, semi-deciduous medium height tree rainforest, deciduous low height tree rainforest and semi-perennial low height tree rainforest. Away from the coast, these rainforests are interspersed with savannah areas and along the coast are accompanied by areas with sand dunes,
mangrove wetlands and
estuaries. Species that can be found in the various rainforests include Spanish cedar (
Cedrela odorata), oxhorn bucida (
Bucida buceras), Campeche logwood (
Haematoxylum campechianum), and wild tamarind (
Lysiloma latisiliquum). It also includes a number of precious tropical hardwoods such as red cedar (
Toona ciliata) Honduran mahogany (
Swietenia macrophylla), ziricote (
Cordia dodecandra) and Hollywood (
Guaiacum sanctum). Along the coastal areas, palms dominate such as the coconut tree (
Cocos nucifera) and royal palm (
Roystonea regia). The main wildlife species in the state are the jaguar, ocelot, puma, deer,
collared peccary, raccoon, hare,
ring-tailed cat and
Yucatan spider monkey. There are many bird species including the
plain chachalaca, quail, pelican, and toucan. Reptiles include rattlesnakes, coral snakes, boa constrictors, various species of sea and land turtles, iguanas, and crocodiles. While still rich in wildlife, much has been decimated because of agriculture and exploitation of forest resources destroying habitat as well as uncontrolled hunting. Most of the state's aquatic life — including many species of fish, crustaceans, and mollusks — is found in the
Bay of Campeche. Many of these are exploited commercially. Most of the state's surface freshwater is in the south and southwest, with rivers, small lakes and estuaries. These diminish in the north where rainfall rapidly filtrates into the subsoil. The rivers in the south and southwest belong to various basins, with the largest being the
Grijalva to which the
Candelaria, Chumpán and Mamantal Rivers belong. The -
Usumacinta also flows in the state but it tends to change course frequently and occasionally divides into branches. The east branch of this river is also called the Palizada River, which has the largest volume although it is narrow. The San Pedro River is another branch of the Usumacinta, which passes by
Jonuta Municipality in Tabasco before emptying in the Gulf of Mexico. The Chumpán River is an isolated river formed by the union of various streams. It runs north–south and empties in the Laguna de Terminos. The Candelaria River forms in Petén, Guatemala and runs north–south and empties into the Laguna de Pargos. The Mamantel River empties into the Laguna de Panlau. The Champotón River is in the center of the state and empties into the Gulf of Mexico. The rest of the state's streams flow only in the rainy season. The
Laguna de Términos lagoon is located in the southwest of the state, near the border with
Tabasco. It is separated from the Gulf of Mexico only by the
Isla del Carmen. It receives freshwater from most of Campeche's rivers as well as saltwater from the Gulf of Mexico. In these brackish waters have developed a number of aquatic species such as sea bass, small sharks, crabs, oysters, turtles, and storks. The lagoon is ringed by smaller lakes and forms the most important lake-lagoon system in the country. These lakes include Atasta, Pom, Puerto Rico, El Este, Del Vapor, Del Corte, Pargos and Panlau. This system formed about five thousand years ago by the accumulation of sediment carried by surrounding rivers. This system connects to the Sabancuy estuary to the northeast. Campeche is in the tropics; it has a humid climate, with a defined rainy season, and a relatively dry season from late winter to early spring. Average annual rainfall varies between . The hottest and most humid areas of the state are along the coast between the Laguna de Términos and the northern border. Average annual temperature is with highs up to in the summer and lows of in the winter. Prevailing winds are from the northwest from November to March, from the north between September and October, from the southeast from June to August and from the south in April and May. In the winter, storms from the north called "nortes" can bring colder dry air from the area of the United States. In the late summer, there are sometimes hurricanes. The state has a number of ecosystems, from rainforest, to
savanna to coast and sea. Environmentally, the state is divided into four major regions. The coastal region consists of the entire coastline of the state and a strip of shallow water just offshore called the
Campeche Bank with coral reefs and low islands called
cays. The region has large expanses of mangroves that dominate the swamps. Non-swamp areas are dominated by palm trees. Wildlife is dominated by bird and reptile species such as storks, pelicans, ducks, seagulls, lizards, turtles and water snakes. The mountain region is in the north and east of the state consisting of two chains of low hills called the Dzibalchen and Sierra Alta. It also includes the savannah area and an area called Los Chenes, where natural wells (called
cenotes) are common. This area is noted for its tropical hardwoods and the
chicle or gum tree. Wildlife includes deer, armadillos, rabbits, quail, and woodpeckers. The rainforest region is located on the center and south of the state with a wide variety of trees including tropical hardwoods such as mahogany. Many of the plants used in the state's cuisine such as
achiote and tropical fruits are from here. The river region is located in the southwest of the state, named after the various rivers that flow here, mostly emptying into the Laguna de Términos. It has the hottest and most humid climate in Campeche with wildlife and vegetation similar to that found in both the Rainforest and Coast regions.
Ría Celestún Biosphere Reserve, and the
Los Petenes Biosphere Reserve. The Calakmul Reserve was created in 1989 over . It consists of Yucatán and Tehuantepec moist forests, containing high and medium growth semi-deciduous forests and seasonally flooded low height semi-deciduous forests. There is also aquatic vegetation. The Laguna de Términos Reserve includes the lagoon and the area surrounding it with an area of . It was established in 1994. Los Petenes is a natural reserve consisting of isolated pockets of rainforest with mangrove areas in between. The wildlife is dependent on a varied and complex system of fresh and brackish water. The reserve extends over in the
municipalities of
Campeche,
Tenabo,
Hecelchakán and
Calkiní. In Isla Arena, Campeche, within the
Ría Celestún Biosphere Reserve,
Conservation International Mexico and CONANP carried out a pilot community mangrove restoration project aimed at restoring 217 hectares of degraded and dead mangroves, emphasizing hydrological restoration to recover water flow and ecosystem function in impacted areas. ==History==