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Deserts & Xeric Shrublands

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St. Peter and St. Paul Rocks

Bioma

Deserts & Xeric Shrublands

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Reino biogeográfico

Neotropic

Rocas manchadas de guano con un faro y antenas parabólicas, Peñascos de San Pedro y San Pablo, Brasil.

Foto de la región - john.vergari / Wikimedia Commons - CC BY 2.0; attribution required.

St. Peter and St. Paul Rocks

Los Peñascos de San Pedro y San Pablo constituyen una de las ecorregiones más pequeñas de la Tierra, un conjunto de diminutos islotes pertenecientes a Brasil que se alzan en el océano Atlántico ecuatorial a más de 800 km de Sudamérica, donde parte de la dorsal mesooceánica aflora sobre la superficie del mar. Apenas existe vegetación terrestre: solo el mayor de los islotes, Belmonte, sostiene musgos y hierbas, mientras que las demás rocas estériles no albergan mucho más que algas marinas tolerantes a la sal y hongos. El clima está moldeado por la Zona de Convergencia Intertropical, con vientos medios flojos interrumpidos por tormentas eléctricas locales, y la única agua dulce procede de la lluvia, ya que ninguno de los islotes cuenta con un suministro permanente. A pesar de lo inhóspito de la tierra, las aguas circundantes son ricas y albergan más de 100 peces de arrecife, de los cuales cerca de un diez por ciento no se encuentran en ningún otro lugar, junto con aves marinas nidificantes como el piquero pardo, la tiñosa parda y la tiñosa negra, y el emblemático cangrejo Sally Lightfoot de las islas. Declarados área de protección ambiental en 1986, los peñascos afrontan ahora un riesgo existencial derivado del cambio climático y de la subida del nivel del mar.

RESOLVE 609

Neotropic

2 sq mi

Deserts & Xeric Shrublands

Tipo de paisaje

Deserts & Xeric Shrublands

Región vegetal

Neotropic

Huella de la región

2 sq mi

Presión sobre el hábitat

Nature Imperiled (Dinerstein NNH 4)

Origen y cuidado

Patrocinado

Plantas nativas

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Suministros de jardinería

Tierra, mantillo, fertilizante y herramientas para plantarlas y cuidarlas.

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Usa esto como el patrón general de plantación para la región: Tierras áridas y semiáridas donde las lluvias escasas y erráticas y la alta evaporación limitan la vegetación a arbustos, suculentas y gramíneas dispersas adaptados a la sequía. Las oscilaciones de temperatura entre el día y la noche son grandes, y la vida está finamente ajustada a la escasez de agua. Para las decisiones de jardín, acota según las restricciones de luz, agua, suelo y tamaño maduro de tu sitio.

Plantas que pueden con esta región

Plotwright aún no tiene plantas con buen ajuste climático para esta región. A medida que el catálogo crezca en esta banda climática, aparecerán sugerencias aquí.

Regiones de plantación similares

Explora otras regiones del mismo bioma. Sus listas de plantas pueden sugerir especies y combinaciones que vale la pena comparar.

Cactus columnares y matorral xérico en la península de Macanao, Venezuela.

RESOLVE 597 - Neotropic

Araya and Paria xeric scrub

The Araya and Paria xeric scrub stretches along Venezuela's northeastern Caribbean coast, covering the Araya and Paria peninsulas, the area around Cumaná, and the offshore islands of Margarita, Coche, and Cubagua. Its vegetation is a mosaic of salt-tolerant dune herbs, dry thorn scrub studded with columnar and prickly-pear cacti such as Stenocereus and Opuntia, and low deciduous woodland with trees including Bursera, Prosopis, and Parkinsonia, grading into semi-deciduous and evergreen forest on the higher hills. The climate is hot and markedly arid, with average temperatures around 24 to 27 degrees Celsius and rainfall that is very sparse on the Araya Peninsula but much higher on the wetter Paria slopes. The ecoregion harbors notable wildlife, most famously the threatened yellow-shouldered amazon parrot, alongside breeding sea turtles and a number of endemic plants, yet it is considered critically threatened by overgrazing, deforestation, sand extraction, and coastal urbanization. For gardeners in hot, dry climates, several drought-hardy genera native here, including the cacti Stenocereus and Opuntia and the flowering tree Parkinsonia, are widely grown as ornamentals.

Deserts & Xeric Shrublands

RESOLVE 598 - Neotropic

Atacama desert

The Atacama Desert ecoregion runs as a continuous strip for nearly 1,000 kilometers along the narrow coast of the northern third of Chile, extending toward southern Peru, within the Neotropic realm. Its interior is one of the driest places on Earth and almost without vegetation, while life concentrates on coastal slopes and ravines where Pacific fog and winter drizzle sustain isolated oases known as lomas. Characteristic plants include columnar and cushion cacti such as Eulychnia, Copiapoa, Browningia, and Leucostele, alongside bromeliads on sandy ground and the endemic tamarugo tree, with around 550 species of ferns, gymnosperms, and flowering plants recorded. Endemism here can exceed 60 percent, and the desert is the largest fog desert on the planet, supporting a sparse but highly adapted fauna whose flagship is Darwin's leaf-eared mouse. For gardeners, several of its hardy succulents, notably Copiapoa cacti, are prized ornamentals well suited to arid, low-water plantings.

Deserts & Xeric Shrublands

RESOLVE 599 - Neotropic

Caribbean shrublands

The Caribbean Shrublands ecoregion is a Neotropic strip of xeric scrub scattered across the low, dry islands of the Caribbean, including the Cayman Islands, all of Barbados, the coastal Windward Islands (parts of Grenada, St. Lucia, Martinique, Dominica, and Trinidad), and much of the Leeward Islands, from Guadeloupe's Grande-Terre and Marie-Galante to Antigua, Anguilla, St. Martin, St. Barthélemy, and the eastern Virgin Islands. Its vegetation is seral in character, grading from herbaceous coastal strand through scrublands and savannas to littoral woodland, and it sits within a broader island setting of tropical dry forests and mangroves. The climate is warm and tropical, with the Cayman Islands experiencing a humid regime, a distinct wet season from May to November, and persistent trade winds. The ecoregion holds notable island endemism: the Cayman Islands alone support 26 herpetofauna species, about three-quarters of them endemic, while the critically endangered Grenada dove, Grenada's national bird, persists in mature dry scrub lowlands and hillsides. Habitat loss and introduced species are the leading threats to these naturally limited coastal scrub habitats.

Deserts & Xeric Shrublands

RESOLVE 600 - Neotropic

Cuban cactus scrub

The Cuban cactus scrub is a xeric shrubland ecoregion strung along the leeward, southeastern coast of Cuba, concentrated in the provinces of Guantanamo and Santiago de Cuba and covering roughly 3,300 square kilometers. Its vegetation is dominated by columnar cacti and other succulents alongside palms, organized into coastal scrubland zones rooted in shallow rendzina soils derived from coralline limestone; characteristic woody genera include Bursera, Croton, Acacia, and Cordia. The climate is semidesert, receiving less than 800 mm of rainfall a year with a prolonged dry period and average temperatures near 26 degrees Celsius. The ecoregion is an important center of plant diversity and endemism, sheltering endemic reptiles such as the Cuban rock iguana along with the flagship Cuban flower bat, a key pollinator of its native flora. For gardeners working hot, dry coastal sites, the region is home to drought-hardy ornamental cactus genera native here, including Opuntia, Harrisia, Pilosocereus, Melocactus, and Leptocereus.

Deserts & Xeric Shrublands

RESOLVE 601 - Neotropic

Galápagos Islands xeric scrub

The Galápagos Islands xeric scrub covers Ecuador's Galápagos archipelago, roughly 128 volcanic islands scattered across the Pacific some 960 km west of the South American mainland. Across the lowland arid zone the vegetation is drought-tolerant scrub and dry forest, characterized by palo santo (Bursera graveolens), the endemic guayabillo (Psidium galapageium), coastal saltbush (Cryptocarpus pyriformis) and Maytenus, and several endemic cactus genera including the tree-like prickly pears (Opuntia), Jasminocereus, and Brachycereus. The climate is semi-arid and oceanic with two seasons: a warm wet season from about December to May and a cooler, drier garúa season, while rainfall climbs sharply with elevation so that higher slopes carry moister Scalesia woodlands. The islands hold around 500 native vascular plant species, roughly 180 of them endemic, and the ecoregion is the celebrated home of the giant Galápagos tortoise and an emblem of evolutionary endemism. Its native flora is now critically threatened by introduced and invasive species, including goats and numerous non-native plants, though nearly the entire ecoregion lies within Galápagos National Park.

Deserts & Xeric Shrublands

3,094 sq mi

Nivel NNH 1

Cactus columnares y nopales en matorral espinoso sobre arena roja en La Guajira, Colombia.

RESOLVE 602 - Neotropic

Guajira-Barranquilla xeric scrub

The Guajira-Barranquilla xeric scrub is an arid shrubland ecoregion strung along the Caribbean coast of Colombia and Venezuela, occupying the Guajira Peninsula and the Ranchería river valley and reaching out to the ABC Islands of the Leeward Antilles. Its dry lowlands are dominated by thorny trees and succulents, with characteristic genera including Acacia, Prosopis (mesquite), and a wealth of cacti such as Opuntia. The climate is hot and dry, with low and highly variable annual rainfall and warm temperatures year-round, a pocket of true xerophytic vegetation within the otherwise wet Neotropics. The region is notable as habitat for a large community of Caribbean flamingo (Phoenicopterus ruber) alongside a diversity of birds and bats, and much of the Serranía de Macuira is protected within Macuira National Park. For gardeners drawn to drought-tolerant plantings, the Los Flamencos Sanctuary here is recognized as a center of plant diversity for Salvia, the bromeliad Hechtia, and native cacti.

Deserts & Xeric Shrublands

Educator packet

Region packet

St. Peter and St. Paul Rocks educator packet

Los Peñascos de San Pedro y San Pablo constituyen una de las ecorregiones más pequeñas de la Tierra, un conjunto de diminutos islotes pertenecientes a Brasil que se alzan en el océano Atlántico ecuatorial a más de 800 km de Sudamérica, donde parte de la dorsal mesooceánica aflora sobre la superficie del mar. Apenas existe vegetación terrestre: solo el mayor de los islotes, Belmonte, sostiene musgos y hierbas, mientras que las demás rocas estériles no albergan mucho más que algas marinas tolerantes a la sal y hongos. El clima está moldeado por la Zona de Convergencia Intertropical, con vientos medios flojos interrumpidos por tormentas eléctricas locales, y la única agua dulce procede de la lluvia, ya que ninguno de los islotes cuenta con un suministro permanente. A pesar de lo inhóspito de la tierra, las aguas circundantes son ricas y albergan más de 100 peces de arrecife, de los cuales cerca de un diez por ciento no se encuentran en ningún otro lugar, junto con aves marinas nidificantes como el piquero pardo, la tiñosa parda y la tiñosa negra, y el emblemático cangrejo Sally Lightfoot de las islas. Declarados área de protección ambiental en 1986, los peñascos afrontan ahora un riesgo existencial derivado del cambio climático y de la subida del nivel del mar.

Realm

Neotropic

Dominant biome

Deserts & Xeric Shrublands

Approximate area

2 square miles

States / provinces

Not recorded

Climate descriptor

Not recorded

Classroom prompts

- Which climate and biome facts explain why this region supports its characteristic plants?

- How do native-plant and wildlife-support claims differ from a species-presence claim?

- Which source-backed facts would you cite before using this region in a classroom map activity?

Use the Sources & citations section below for page citation styles and region source links.

Fuentes y citas

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Plotwright. (n.d.). St. Peter and St. Paul Rocks (St. Peter and St. Paul Rocks). Retrieved 2026, August 20, from https://plotwright.com/regions/resolve-609

Fuentes para esta región

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RESOLVE 2017 Terrestrial Ecoregions (Dinerstein et al.)

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