Selvas y Humedales de Cozumel

Selvas y Humedales de Cozumel is a state ecological reserve protecting the interior forests and wetlands of Cozumel Island, located in the Caribbean Sea approximately 18 km off the eastern coast of the Yucatan Peninsula in Quintana Roo, Mexico. ^[1] The reserve covers the central and eastern portions of the island, encompassing tropical dry forests, mangroves, freshwater wetlands, and coastal lagoons that have been largely spared from the hotel development concentrated on Cozumel's western shore. The island's terrestrial ecosystems are of exceptional conservation value because of high endemism driven by thousands of years of island isolation. The reserve is managed by the Quintana Roo state government in coordination with the Cozumel municipal government.

Cozumel's island isolation has produced several endemic subspecies and species of conservation concern. The Cozumel raccoon (Procyon pygmaeus), one of the world's smallest raccoons, is restricted entirely to the island and is critically endangered, with the IUCN estimating approximately 192 mature individuals remaining as of 2016. ^[1] The Cozumel coati (Nasua nelsoni) is similarly endemic and considered on the brink of extinction. The Cozumel thrasher (Toxostoma guttatum) is a critically endangered endemic bird species; no confirmed sightings have been recorded since 2004 and the species may be functionally extinct. ^[2] The Cozumel vireo (Vireo bairdi) is also a critically endangered endemic bird dependent on the interior forest. American flamingos (Phoenicopterus ruber) use the coastal lagoons seasonally. The reserve provides essential feeding and nesting habitat for three marine turtle species — loggerhead, green, and hawksbill — that nest on the eastern beaches. American crocodiles inhabit the mangrove lagoons on the western coast.

The interior of Cozumel supports semi-deciduous tropical dry forest, transitioning to taller semi-evergreen forest in moister depressions. Dominant canopy trees include Bursera simaruba (gumbo-limbo), Piscidia piscipula (Jamaica dogwood), Metopium brownei (chechem, black poisonwood), and Manilkara zapota (sapodilla, producing chicle). The reserve's mangrove systems are among the most extensive in Quintana Roo, featuring red mangrove (Rhizophora mangle), black mangrove (Avicennia germinans), white mangrove (Laguncularia racemosa), and buttonwood (Conocarpus erectus). Freshwater lagoons support aquatic vegetation including water lilies (Nymphaea ampla) and tule (Typha domingensis). Epiphytic bromeliads, orchids, and ferns are abundant in the forest canopy, reflecting the humid Caribbean climate.

Cozumel Island is a tilted fault block of Cretaceous to Miocene limestone resting on the northeastern shoulder of the Caribbean Plate. The island's surface geology consists entirely of flat-lying to gently dipping carbonate rocks — limestones and dolomites — overlain by thin soils and a karst landscape typical of the broader Yucatan Peninsula. The absence of surface rivers is characteristic; virtually all precipitation infiltrates through karst conduits and emerges in coastal springs and submarine groundwater discharges. The eastern coast is exposed to prevailing trade winds and Atlantic swell, resulting in active erosion and a rugged ironshore coastline of pitted and undercut limestone. The western shore is protected and flanked by one of the world's most important coral reef systems, the Mesoamerican Barrier Reef. ^[1]

The reserve experiences a tropical savanna climate (Koppen Aw) with warm temperatures year-round. Mean annual temperature is approximately 26 degrees Celsius with little seasonal variation. Annual rainfall averages 1,100 to 1,400 mm, concentrated in the June to October wet season. The September to October peak coincides with the Caribbean hurricane season, and Cozumel has been struck by multiple major hurricanes, most devastatingly by Hurricane Wilma in 2005 (Category 5) and Hurricane Gilbert in 1988. Hurricane disturbance is a natural driver of forest structure, creating mosaic patches of different successional ages. Dry season trade winds from December through April are strong and steady. Shallow water temperatures in the surrounding reef range from 25 to 29 degrees Celsius, supporting the exceptional coral diversity of the Cozumel Reef.

Cozumel was a major center of Maya civilization, particularly important as a pilgrimage destination for worshippers of Ixchel, the Maya goddess of the moon, medicine, and childbirth. The Maya name for the island, Ah-Cuzamil-Peten, means 'Island of Swallows.' ^[1] The island's San Gervasio archaeological site preserves temples and ceremonial structures used from approximately 300 to 1500 CE. The first Spanish contact occurred in 1518 when Juan de Grijalva's expedition landed on Cozumel; Hernan Cortes stopped here in 1519, destroying Maya idols and erecting a cross. Disease and forced labor devastated the Maya population during the colonial period, and the island was largely depopulated by the mid-16th century. Resettlement by Yucatecan Maya families occurred in the 19th century, and the island's modern economy developed around chicle harvesting, fishing, and eventually tourism.

Protection of Cozumel's interior ecosystems developed gradually in response to accelerating tourism development on the island's western coast from the 1970s onward. The Arrecifes de Cozumel National Marine Park was established in July 1996 to protect the reef system, while terrestrial conservation of the island's interior and eastern coast required separate designation. ^[1] The Selvas y Humedales de Cozumel state reserve was established to protect the island's endemic species and critical wetland habitats from conversion to tourism infrastructure and residential development. The Cozumel raccoon and Cozumel thrasher were listed as Critically Endangered by the IUCN, and their precarious status helped build political support for the reserve's designation. The Cozumel Wildlife Conservation Program, involving IUCN, CONABIO, and the state government, has been active since the early 2000s.

The reserve is accessible primarily via the cross-island road that traverses Cozumel from the town of San Miguel to the eastern coast. The eastern coastal road provides vehicle access to the rugged windward shore with its ironshore formations, blowholes, and nesting beaches. A small nature trail system has been developed at the Punta Sur Eco Beach Park on the island's southern tip, which incorporates part of the reserve's lagoon ecosystem. Bird watchers seek out the endemic Cozumel vireo in the interior scrub forest, particularly in the transitional zone between dry forest and mangrove. The lagoon system near the Punta Sur lighthouse supports abundant wading birds and is excellent for kayaking. The western reef is world-famous for scuba diving, with Palancar Reef and Colombia Reef among the most celebrated Caribbean dive sites. ^[1]

Cozumel is reached by ferry from Playa del Carmen (45 minutes) or by direct flights into Cozumel International Airport from major Mexican and US cities. The reserve has no formal visitor infrastructure beyond the Punta Sur Eco Beach Park, which charges an admission fee and operates boat tours of the interior lagoon. Most visitors to the island focus on the reef diving and western waterfront; the interior and eastern coast are relatively undeveloped. Rental cars and motor scooters are available in San Miguel for exploring the eastern coastal road. The Cozumel Natural History Museum in San Miguel provides an introduction to the island's biodiversity and archaeology. Guided birdwatching tours focused on endemic species can be arranged through local naturalist operators.

The Cozumel raccoon faces extinction from habitat loss, predation by introduced species (particularly feral cats, dogs, and rats), and hurricane disturbance; the IUCN estimates fewer than 250 mature individuals survive. ^[1] Invasive boa constrictors (Boa constrictor), deliberately introduced to the island in 1971 and now well-established, have dramatically reduced endemic bird and small mammal populations and are the island's dominant terrestrial predator. ^[2] Removal programs targeting feral animals and boa constrictors have been operating since 2007 with partial success. Water quality in the lagoon systems is threatened by coastal development and inadequate sewage treatment. The reserve participates in the Mesoamerican reef conservation network, sharing data on water quality and coastal ecosystem health with managers of adjacent marine protected areas.