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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

Rochas manchadas de guano com um farol e antenas parabólicas, Penedos de São Pedro e São Paulo, Brasil.

Foto da região - john.vergari / Wikimedia Commons - CC BY 2.0; attribution required.

St. Peter and St. Paul Rocks

Os Rochedos de São Pedro e São Paulo constituem uma das menores ecorregiões da Terra, um conjunto de minúsculos ilhéus pertencentes ao Brasil que se erguem no oceano Atlântico equatorial a mais de 800 km da América do Sul, onde parte da dorsal mesoceânica aflora acima da superfície do mar. Praticamente não há vegetação terrestre: apenas o maior dos ilhéus, Belmonte, sustenta musgos e gramíneas, enquanto as demais rochas estéreis não abrigam muito além de algas marinhas tolerantes ao sal e fungos. O clima é moldado pela Zona de Convergência Intertropical, com ventos médios fracos interrompidos por tempestades locais, e a única água doce vem da chuva, já que nenhum dos ilhéus possui suprimento permanente. Apesar da aridez da terra, as águas circundantes são ricas e abrigam mais de 100 peixes de recife, dos quais cerca de dez por cento não ocorrem em nenhum outro lugar, ao lado de aves marinhas nidificantes como o atobá-marrom, o noddi-marrom e o noddi-preto, e o emblemático caranguejo Sally Lightfoot das ilhas. Declarados área de proteção ambiental em 1986, os rochedos enfrentam agora um risco existencial decorrente das mudanças climáticas e da elevação do nível do mar.

RESOLVE 609

Neotropic

2 sq mi

Deserts & Xeric Shrublands

Tipo de paisagem

Deserts & Xeric Shrublands

Região vegetal

Neotropic

Pegada da região

2 sq mi

Pressão sobre o habitat

Nature Imperiled (Dinerstein NNH 4)

Origem e cuidado

Patrocinado

Plantas nativas

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Suprimentos de jardinagem

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Use isto como o padrão geral de plantio para a região: Terras áridas e semiáridas onde chuvas escassas e erráticas e a alta evaporação limitam a vegetação a arbustos, suculentas e gramíneas esparsas adaptados à seca. As variações de temperatura entre o dia e a noite são grandes, e a vida está finamente ajustada à escassez de água. Para decisões de jardim, refine pelas restrições de luz, água, solo e tamanho adulto do seu local.

Plantas que aguentam esta região

O Plotwright ainda não tem plantas com bom encaixe climático para esta região. À medida que o catálogo crescer nesta faixa climática, sugestões aparecerão aqui.

Regiões de plantio semelhantes

Explore outras regiões do mesmo bioma. As listas de plantas delas podem sugerir espécies e combinações que vale a pena comparar.

Cactos colunares e vegetação arbustiva xérica na 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

Nível NNH 1

Cactos colunares e figueiras-da-índia em matagal espinhoso sobre areia vermelha em La Guajira, Colômbia.

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

Os Rochedos de São Pedro e São Paulo constituem uma das menores ecorregiões da Terra, um conjunto de minúsculos ilhéus pertencentes ao Brasil que se erguem no oceano Atlântico equatorial a mais de 800 km da América do Sul, onde parte da dorsal mesoceânica aflora acima da superfície do mar. Praticamente não há vegetação terrestre: apenas o maior dos ilhéus, Belmonte, sustenta musgos e gramíneas, enquanto as demais rochas estéreis não abrigam muito além de algas marinhas tolerantes ao sal e fungos. O clima é moldado pela Zona de Convergência Intertropical, com ventos médios fracos interrompidos por tempestades locais, e a única água doce vem da chuva, já que nenhum dos ilhéus possui suprimento permanente. Apesar da aridez da terra, as águas circundantes são ricas e abrigam mais de 100 peixes de recife, dos quais cerca de dez por cento não ocorrem em nenhum outro lugar, ao lado de aves marinhas nidificantes como o atobá-marrom, o noddi-marrom e o noddi-preto, e o emblemático caranguejo Sally Lightfoot das ilhas. Declarados área de proteção ambiental em 1986, os rochedos enfrentam agora um risco existencial decorrente das mudanças climáticas e da elevação do nível do 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.

Fontes e citações

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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

Fontes para esta região

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RESOLVE 2017 Terrestrial Ecoregions (Dinerstein et al.)

Estrutura principal de ecorregiões

One Earth

Wikipedia

Wikimedia Foundation

Abrir fonte

Guia de fontes