Baixa da Ponta dos Rosais: Difference between revisions
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{{Geobox|River |
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| name = Baixa da Ponta dos Rosais |
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| native_name = Baixa da Ponta dos Rosais |
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| other_name = |
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| category = [[Oceanic plateau]] |
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| native_category = Baixa |
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| etymology_type = Named for |
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| etymology = Ponta dos Rosais |
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| official_name = Baixa dos Rosais |
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| nickname = |
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| image = Ponta dos Rosais, Rosais, Velas, ilha de São Jorge, Açores.JPG |
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| image_caption = A view at the edge of Ponta dos Rosias, the ''Baixa'' is located some {{convert|3|mi|km}} north of this point |
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| image_size = 235 |
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<!-- *** Country *** --> |
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| country = {{flag|Portugal}} |
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| state_type = Autonomous region |
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| state = {{flag|Azores|name=Azores}} |
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| region_type = Islands |
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| region = Eastern Group |
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<!-- *** Family *** --> |
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| parent_type = Location |
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| parent = Azores Platform |
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| parent1_type = Location |
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| parent1 = Mid-Atlantic Ridge |
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| parent2_type = Location |
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| parent2 = Atlantic Ocean |
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| range = Azores |
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| range_type = Archipelago |
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| border = |
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| part_type = |
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| part = |
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| city_type = |
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| city = |
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| landmark = |
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| river = |
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<!-- *** Locations *** --> |
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| highest = Baixa |
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| highest_location = |
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| highest_region = |
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| highest_state = |
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| highest_elevation = |
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| highest_lat_d = 38 |
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| highest_lat_m = 46.80 |
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| highest_lat_s = |
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| highest_lat_NS = N |
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| highest_long_d = 28 |
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| highest_long_m = 23.70 |
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| highest_long_s = |
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| highest_long_EW = W |
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| lowest = |
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| lowest_location = |
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| lowest_region = |
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| lowest_country = |
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| lowest_elevation = |
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| lowest_lat_d = |
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| lowest_lat_m = |
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| lowest_lat_s = |
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| lowest_lat_NS = |
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| lowest_long_d = |
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| lowest_long_m = |
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| lowest_long_s = |
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| lowest_long_EW = |
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<!-- *** Dimensions *** --> |
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| length = |
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| width = |
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| depth = 20 |
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| area = |
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<!-- *** Features *** --> |
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| geology = Alkali basalt |
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| geology1 = Tephra |
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| geology2 = Trachyte |
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| geology3 = Trachybasalt |
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| orogeny = Volcanism |
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| period = Holocene |
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| biome = Marine (ocean) |
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| plant = |
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| animal = |
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| free = |
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<!-- *** Website *** --> |
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| website = |
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| commons = |
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<!-- *** Footnotes *** --> |
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| footnotes = |
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}} |
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The '''Baixa da Ponta dos Rosais''' is an [[oceanic plateau]] north-northwest of the coast of [[Ponta dos Rosais]], municipality of [[Velas (Azores)|Velas]], island of [[São Jorge Island|São Jorge]], in the [[Portugal|Portuguese]] archipelago of the [[Azores]]. The seamount region is located {{convert|3|mi|km}} from the coast, and {{convert|9|mi|km}} from the central port of [[Velas (Azores)|Velas]], from where it is a popular destination for divers who frequent the Azores. |
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==Geography== |
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{{Cleanup-rewrite|it reads like a machine translation|date=December 2011}} |
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Pertaining to the northern [[Freguesia (Portugal)|civil parish]] of [[Rosais]], Ponta dos Rosais is an extension of the north-northwest and south-southeast fissural formation of the island, along a fault system that extends from São Miguel to São Jorge, called the Terceira Rift. Effusive and explosive submarine eruptions across these fissural faults gave rise to the long, slender island of São Jorge. Oceanic plateaus extending into the ocean, north and south of the island, are off-shoots of these formative forces. |
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The ''Baixa'' is one of these plateaus, made of submerged oceanic basalt cliffs created by fissural tectonics, with accentuated slopes aligned northwest to southeast from Ponta dos Rosais. Its location, with a mix of open sea and currents, means that the area's condition varies and is frequently turbulent. |
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'''Baixa da Ponta dos Rosais''' is a point near [[Ponta dos Rosais]] north of [[Rosais]] on [[São Jorge Island]], [[Azores]]. |
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===Biome=== |
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==Geological description and formation== |
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Sandy deposits from pyroclastic surges at the point of Rosais has meant that a small area of the Baixa is favourable for the congregation of sea mammals and marine species. Within a radius of {{convert|20|m|ft}} there are elevated number of animal species, in addition to sea plants. Predominantly, the area is a habitat for brown alga (''[[Stypopodium zonale]]''), red alga (''[[Asparagopsis armata]]''), [[Sawfish]], Vadigo (''[[Campogramma glaycos]]''), [[Frigate tuna]] ([[Auxis thazard]]) and [[anchovy]], in addition to [[Needlefish]], [[Atlantic goliath grouper|Grouper]] and [[Hake]], among others; there are more than 69 different species (the area has a 7.2 Margalef scale/biodiversity index-rating), and it has been defended as a candidate for protection, owing to the biodiversity in the region.<ref>Santo et al. (1995)</ref> |
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==References== |
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Its geologic formation represents and makes up many of several cliffs and are of volcanic origin with natural basalt created by large fissures and accented declivities and encountered several with a line of a tectonic origin going northwest to southeast. Several sandy deposits with an old pyroclastic origin in areas with the most protection of sea mammals. |
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;Notes |
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{{Reflist|2}} |
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These formations presents of a variety of things with a distance from the coast that presents a radius of about 20 metres around the coastling. Its entry with the Baixa da Ponta dos Rosais connects with the sea and the distance around the coast. It is around three nautical miles from Ponta dos Rosais and nine from Porto das Velas. |
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;Sources |
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* {{citation |last=Santos |first=R.S. |last2=Hawkins |first2=S.J. |last3=Monteiko |first3=L.R. |last4=Alves |first4=M. |last5=Isidro |first5=E.J. |year=1995 |contribution=Marine research, reserves and conservation in the Azores |title=Aquatic Conversation |volume=5 |issue=3 |pages=1-354}} |
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Its used area makes up of sea mammals mostly during the diurnal visit with a tide area by its sea current's strength. The area are mostly turbulent. |
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==Fauna and Flora characteristics== |
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Its flora and fauna makes up around the lower parts including ''[[Stypopodium zonale]]'', ''[[Asparagopsis armata]]'', ''[[Gellidium sp]]'', ''[[Campogramma glaycos]]'', [[anchovy|anchovies]], etc. They make up of more than 69 different species and is indexed at 7.2 on the [[Margalev scale]]. |
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Santo et al. (1995) defends an important protection area of the ''lower'' part with its importance on biodiversity. |
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==Species of flora and fauna== |
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*[[Anemones]] (''[[Alicia mirabilis]]'') |
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*''[[Arbacia lixula]]'' |
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*''[[Asparagopsis armata]]'' |
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*''[[Balistes carolinensis]]'' |
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*[[Barracuda]] (''[[Sphyraena]]'') |
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*''[[Bonnemaisonia hamifera]]'' |
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*''[[Bothus podas maderensis]]'' |
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*''[[Calcinus tubularis]]'' |
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*''[[Campogramma glaycos]]'' |
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*''[[Caretta caretta]]'' |
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*''[[Chondrostoma polylepis]]'' |
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*''[[Dictyota dichotoma]]'' |
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*[[Ascídia-flor]] (''[[Distaplia corolla]]'') |
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*''[[Docoglossa]]'' |
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*Dogfish (''[[Bodianus scrofa]]'') |
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*''[[Epinephelus itajara]]'' |
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*[[Kingfisher]] (''[[Coris julis]]'') |
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*''[[Megabalanus azoricus]]'' |
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*[[Salmone]] (''[[Mullus surmuletus]]'') |
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*''[[Pelagia noctiluca]]'' |
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*''[[Physalia physalis]]'' |
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*''[[Pterocladiella capillacea]]'' |
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*''[[Octopus vulgaris]]'' |
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*''[[Pomatomus saltator]]'' |
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*''[[Sphoeroides marmoratus]]'' |
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*[[Starfish]] (''[[Ophidiaster ophidianus]]'') |
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*''[[Strongylocentrotus purpuratus]]'' |
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*''[[Taeniura grabata]]'' |
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*''[[Trachurus picturatus]]'' |
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*''[[Tursiops truncatus]]'' |
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*''[[Ulva rígida]]'' |
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[[Category:São Jorge Island]] |
[[Category:São Jorge Island]] |
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Revision as of 11:27, 30 December 2014
Template:Geobox The Baixa da Ponta dos Rosais is an oceanic plateau north-northwest of the coast of Ponta dos Rosais, municipality of Velas, island of São Jorge, in the Portuguese archipelago of the Azores. The seamount region is located 3 miles (4.8 km) from the coast, and 9 miles (14 km) from the central port of Velas, from where it is a popular destination for divers who frequent the Azores.
Geography
Pertaining to the northern civil parish of Rosais, Ponta dos Rosais is an extension of the north-northwest and south-southeast fissural formation of the island, along a fault system that extends from São Miguel to São Jorge, called the Terceira Rift. Effusive and explosive submarine eruptions across these fissural faults gave rise to the long, slender island of São Jorge. Oceanic plateaus extending into the ocean, north and south of the island, are off-shoots of these formative forces.
The Baixa is one of these plateaus, made of submerged oceanic basalt cliffs created by fissural tectonics, with accentuated slopes aligned northwest to southeast from Ponta dos Rosais. Its location, with a mix of open sea and currents, means that the area's condition varies and is frequently turbulent.
Biome
Sandy deposits from pyroclastic surges at the point of Rosais has meant that a small area of the Baixa is favourable for the congregation of sea mammals and marine species. Within a radius of 20 metres (66 ft) there are elevated number of animal species, in addition to sea plants. Predominantly, the area is a habitat for brown alga (Stypopodium zonale), red alga (Asparagopsis armata), Sawfish, Vadigo (Campogramma glaycos), Frigate tuna (Auxis thazard) and anchovy, in addition to Needlefish, Grouper and Hake, among others; there are more than 69 different species (the area has a 7.2 Margalef scale/biodiversity index-rating), and it has been defended as a candidate for protection, owing to the biodiversity in the region.[1]
References
- Notes
- ^ Santo et al. (1995)
- Sources
- Santos, R.S.; Hawkins, S.J.; Monteiko, L.R.; Alves, M.; Isidro, E.J. (1995), "Marine research, reserves and conservation in the Azores", Aquatic Conversation, vol. 5, pp. 1–354