Overview

Comprehensive Description

Description

Simple erect terete fronds 11 cms long with few irregular branches growing upwards from a discoid holdfast. Bright to dark red in colour. Said to be sometimes confused with Gracilaria gracilis, the latter is however elastic and grows to 60 cms or more in length.
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Distribution

Generally western around the British Isles including the Shetlands but being sublittoral and probably under-recorded. Europe: Atlantic coasts of Spain and France.
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Source: Encyclopedia of Marine Life of Britain and Ireland

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Ecology

Habitat

Depth range based on 15 specimens in 1 taxon.

Environmental ranges
  Depth range (m): 0 - 25.75

Graphical representation

Depth range (m): 0 - 25.75
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Epilithic, generally sublittoral to 30 m.
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Source: Encyclopedia of Marine Life of Britain and Ireland

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Cordylecladia erecta

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 1
Species With Barcodes: 1
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Source: Barcode of Life Data Systems (BOLD)

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Wikipedia

Cordylecladia erecta

Cordylecladia erecta is a species of red alga in the family Rhodymeniaceae. It is found in the north east Atlantic Ocean and the Mediterranean Sea and is the type species of the genus.[2]

Description[edit]

Cordylecladia erecta grows in small tufts from a disc-like, rhizoidal, crustose base attached to rock but often hidden beneath the sand. It has tough reddish-brown cylindrical fronds that grow to 10 cm (4 in). These are solid, either unbranched or sparsely branched dichotomously and taper to points. The reproductive structures are only visible in winter and appear as enlarged, spindle-shaped areas near the ends of the fronds.[3] This seaweed could be confused with Ahnfeltia plicata but that species is more bushy with wiry fronds that branch irregularly and are only 1 mm (0.04 in) in diameter.[4]

Distribution and habitat[edit]

Cordylecladia erecta occurs in the eastern Atlantic Ocean and the Mediterranean Sea. Its range extends from the Shetland Islands southwards but in the British Isles it is mostly found on the south and west coasts. It is found on the lower shore and subtidally, on rocks covered with sand.[1][3]

Biology[edit]

The life cycle of Cordylecladia erecta involves an alternation of generations with both sexual and asexual phases. Male gametophyte plants have spermatangial sori that form pod-like structures 4 to 7 mm (0.16 to 0.28 in) long close to the tips of the fronds. Female plants are recognisable by bunches of sterile hairs that develop first near the tips of the fronds and later extend to most of the rest of the frond. Carpogonia develop on short curved branches among these hairs. These structures liberate gametes into the water and after fertilisation, the zygotes settle to the seabed. Tetrasporophyte plants develop from these and are at first indistinguishable from the gametophytes but when they become mature they develop spindle-shaped structures at the tips of the fronds measuring up to 5 by 3 mm (0.20 by 0.12 in). These release tetraspores which develop into a new generation of gametophyte plants. It has been shown that the cycle is initiated by the short day conditions existing between October and April.[2]

References[edit]

  1. ^ a b c Guiry, Michael D. (2012). "Cordylecladia erecta (Greville) J. Agardh, 1852". World Register of Marine Species. Retrieved 2012-09-06. 
  2. ^ a b Brodie, J.; Guiry, M. D. (1988). "Life history and reproduction of Cordylecladia erecta (Rhodymeniaceae, Rhodophyta)". Brirish Phycological Journal 23 (4): 347–364. doi:10.1080/00071618800650381. 
  3. ^ a b "Cordylecladia erecta (Greville) J. Agardh". The seaweed site. Retrieved 2012-09-06. 
  4. ^ "Ahnfeltia plicata (Hudson) Fries". The seaweed site. Retrieved 2012-09-06. 
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