Scleractinian corals (Cnidaria: Anthozoa) from reef ecosystems on the Alagoas coast, Brazil

Author(s):  
Monica Dorigo Correia

The distribution and ecology of scleractinian corals on reef ecosystems along the coast of the State of Alagoas, north-east Brazil, were characterized. The scleractinians comprised 13 species in nine families, with five endemic corals, on the Alagoas coast. All of these species were found on reef ecosystems of two distinct geological origins. Coral reefs are predominant on the northern and central coast with banks near the beach line and distributed along the coast line, with many platform surfaces emerging during low tide. Sandstone reefs are more common along the south coast of Maceió city and the southern coast of Alagoas. These reefs were formed by old sand banks solidified through sedimentation starting from chemical reactions with calcium carbonate or iron oxide from the Quaternary period, and are generally in rows parallel to the coastline and near the outlets of rivers and estuaries. A few species including Favia gravida and Siderastrea stellata were found in the intertidal zone on top of the reef platform of both types of reefs. The other scleractinian species were observed on the reef borders where there were some inlets and channels. A larger number of coral species occur on the northern coast where the seawater is clearer throughout the year.

1993 ◽  
Vol 7 (6) ◽  
pp. 1575
Author(s):  
P Grootaert ◽  
HJG Meuffels

Four species of the marine genus Cymatopus are reported from the coasts of Papua New Guinea. Two species, C. calcaratoides, sp. nov. (northern coast), and C. motuporensis, sp. nov. (southern coast), and the female of C. leopoldi Meuffels & Grootaert are described. Together with C. calcaratus and C. malayensis, they form a distinct monophyletic group in the western Pacific. The larvae and pupae of Cymatopus live in the thin layer of algae and debris on the rocks in the eulittoral zone. The adult flies feed at low tide on the larvae of chironomids and ceratopogonids in the intertidal zone. *Contribution No. 257 of the Leopold I11 Biological Station on Laing Island.


Author(s):  
David Abrego ◽  
Andrew H Baird ◽  
Emily Howells ◽  
Stephen DA Smith

We describe an extreme habitat for scleractinian corals in intertidal rock pools of southeastern Australia. The pools host a small but hardy subset of coral species despite experiencing conditions beyond those documented for corals anywhere in Australia. Understanding mechanisms behind this may improve insights into climate change adaptation in corals.


2017 ◽  
Vol 32 (1) ◽  
pp. 11
Author(s):  
IVONNE LUNA ORTEGA ◽  
VICENCIO DE LA CRUZ FRANCISCO

Las macroalgas son abundantes en el arrecife Oro Verde, Veracruz pero, hasta ahora, se desconocía su riqueza taxonómica, y se presume que presentan asentamientos en los corales escleractinios hermatípicos. Por ello el presente trabajo investigó qué especies de corales presentaron colonizaciones algales; además, se determinó la composición taxonómica y la similitud de los ensambles de macroalgas entre las especies de corales escleractinios. Se establecieron diez puntos de muestreo de manera sistemática en el arrecife; en cada lugar de estudio se colocó un transecto de banda de 50 x 2 m para localizar y recolectar macroalgas en superficies muertas de corales escleractinios. La frecuencia de aparición de las algas se estimó con base en el total de corales estudiados, así como para cada especie coral. Para explicar similitudes y diferencias significativas de la composición de ensamblajes macroalgales entre especies de corales se aplicaron análisis de similitud y ordenación. Los corales escleractinios con ensambles de algas fueron Siderastrea siderea, Montastraea cavernosa, Pseudodiploria strigosa, Colpophylia natans, Stephanocoenia intersepta, Porites astreoides, Orbicella annularis, Orbicella faveolata. De un total de 100 colonias coralinas revisadas se determinaron 32 especies de macroalgas, las cuales están representadas en tres divisiones, 10 órdenes y 15 familias. Las macroalgas corticadas, foliosas corticadas y filamentosas fueron las más representadas en especies. Las algas de mayor frecuencia sobre los corales masivos fueron Laurencia obtusa, Amphiroa rigida y Caulerpa chemnitzia. Los corales masivos con mayor número de registros de algas fueron S. siderea (9 especies), M. cavernosa (19) y P. strigosa (17). Los ensambles algales en los corales masivos presentaron baja similitud, sin embargo no se detectaron grupos significativamente disimiles. Solamente S. siderea y M. cavernosa son ligeramente parecidos en la composición ficológica. Los resultados sugieren que los corales masivos del arrecife Oro Verde son vulnerables a la colonización de algas, pero es necesario indagar qué condiciones preceden al asentamiento algal.Macroalgal assemblages on dead surfaces of scleractinian corals (Anthozoa: Scleractinia) in the Oro Verde reef, Veracruz, MexicoBenthic macroalgae are abundant in the Oro Verde reef but their taxonomic richness was hitherto unknown and it is presumed to present settlements on the massive corals. For this reason, the present work investigated which species of massive corals show algal colonization. Also, their taxonomic composition was determined, and the similarity of the algal assemblages between species of scleractinian corals was measured. Ten sampling points were systematically established in the reef, where a transect band of 50 x 2 m at each site was placed to locate and collect algae fron the dead surfaces of scleractinian corals. The frequency of occurrence of algae species was estimated based on the total number of coral species studied, as well as on each coral species. Similarity and ordination analysis were applied in order to explain similarities and significant differences of the phycological composition among the coral species. Scleractinian corals with algal assemblages were: Siderastrea siderea, Montastraea cavernosa, Pseudodiploria strigosa, Colpophylia natans, Stephanocoenia intersepta, Porites astreoides, Orbicella annularis, Orbicella faveolata. Thirty-two species of algae were identified from a total of 100 revised coral colonies which are represented in 3 divisions, 10 orders and 15 families. The corticated, foliose corticated and filamentous macroalgae were the most represented species. The most frequent algae on massive corals were Laurencia obtusa, Amphiroa rigida and Caulerpa chemnitzia. Massive corals with higher algal records were S. siderea (9 species), M. cavernosa (19 species) and P. strigosa (17 species). The algal assemblages on the massive corals presented low similarity. However, no significant dissimilar groups were detected. Only S. siderea and M. cavernosa are relatively similar in phycological composition. The results suggest that the massive corals of the Oro Verde reef are vulnerable to the colonization of algae, but it is necessary to investigate the conditions preceding algal settlement.


Author(s):  
Stephen J. Hawkins ◽  
Kathryn E. Pack ◽  
Louise B. Firth ◽  
Nova Mieszkowska ◽  
Ally J. Evans ◽  
...  

1801 ◽  
Vol 91 ◽  
pp. 159-164 ◽  

Herland Mine is situated in the parish of Gwinear, about seven miles N. E. of St. Michaelʼs Mount, on the southern coast of Cornwall; and two miles and a half from the mouth of the river Hayle, on the northern coast of the same county: it is contiguous to Prince George Mine. It commences in a valley on the west, and passes through a hill, which is first of steep and then of moderate ascent, for upwards of half a mile eastward; when the principal copper lodes, which follow this direction, meet with a large cross lode, by which, and by other cross courses and flookans, which intersect them in their farther progress, they are repeatedly heaved, and so disordered by these heaves, in their form and position, and so changed by them, in respect to their composition, as hardly to be recognized.


1889 ◽  
Vol 10 ◽  
pp. 46-85 ◽  
Author(s):  
E. L. Hicks

In last year's volume of this Journal (ix. pp. 82, 83) Mr. Theodore Ben described the situation of this Carian town, which he discovered about three miles to the north-east of Loryma. In laying before the reader the inscriptions found on this site, from which we recover its name, I would call attention to the accompanying Map of Casarea and its neighbourhood, prepared by Mr. Bent at my request. He has made it the more valuable by adding the following memoranda:—‘During investigations on the southern coast of Caria, near the promontory anciently called Cynossema, and now known as Cape Aloupo or Fox, we were anchored in the Bay of Aplotheka, around which are the ruins of ancient Loryma. Whilst here, we heard from the peasants of a curious harbour and ruins at a little distance from the bay. Accordingly we rowed along the coast in our boat past several islets, and soon arrived at this harbour, the entrance of which is not a stone's throw across, though it opens within into a considerable basin surrounded by high mountains.


1989 ◽  
Vol 54 (3) ◽  
pp. 522-533 ◽  
Author(s):  
J. Jefferson MacKinnon ◽  
Susan M. Kepecs

The discovery of a number of prehispanic saltmaking sites on the southern coast of Belize by the Point Placencia Archaeological Project suggests a concern with local saltmaking during the Late Classic and perhaps later periods. Previously, only one small source was thought to have produced salt in prehispanic Belize, and it was believed that most of this mineral was imported from the northern coast of Yucatan. This paper describes the sites located by our survey and offers an interpretation of the local saltmaking process. It is suggested that Placencia salt was inferior in quality to that from Yucatan, and that it might have been consumed by commoners, while elites were able to obtain pure Yucatecan salt.


2015 ◽  
Vol 41 (1) ◽  
pp. 29-42
Author(s):  
Mahiuddin Md Shahjahan Bhuiyan ◽  
Md Redwanur Rahman ◽  
Md Sarwar Jahan ◽  
Minu Haque

A total of 6 species of freshwater mussels under the family Unionidae, order- Unionoida were collected, which are new records for Bangladesh. The information on the distribution and ecology, population density and seasonal variation of Lamellidens phenchooganjensis, L. indawgyiensis, L. generosus, Parreysia (Parreysia) favidens var. assamensis, P. (P.) var. marcens and P. (P.) var. viridula were provided in this paper. Population density and morphometric parameters were measured. Moreover, economic importance and economic role were stated.Bangladesh J. Zool. 41(1): 29-42, 2013


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