Coral Growth Assessment on an Established Artificial Reef in Antigua

2015 ◽  
Vol 33 (1) ◽  
pp. 90-95 ◽  
Author(s):  
K. Cummings ◽  
A. Zuke ◽  
B. De Stasio ◽  
J. Krumholz
Keyword(s):  
Artificial Reef ◽  
Coral Growth ◽  
Growth Assessment

scholarly journals The Growth Rate Of Acropora sp. Transplanted On Artificial Reefs In Kareko Waters Of North Lembeh Sub-District Of Bitung City

2017 ◽  
Vol 5 (2) ◽  
pp. 234
Author(s):  
Kayyan Mompala ◽  
Ari B Rondonuwu ◽  
Unstain N. W. J Rembet
Keyword(s):  
Growth Rate ◽  
Survival Rate ◽  
Success Rate ◽  
Growth Rates ◽  
Artificial Reef ◽  
Coral Growth ◽  
Artificial Reefs ◽  
Scuba Divers ◽  
Length Increase ◽  
Absolute Length

The purpose of this research is to know the success rate of Acropora sp coral growth rate transplanted on different artificial reefs (iron and concrete) in Kareko waters of North Lembeh Sub-district of Bitung City. The study was conducted in November 2016 - February 2017. The data were collected by SCUBA divers and counted the number of dead and surviving coral transplants and measured the absolute length increase for each month. The results showed that the survival rate and the growth rate of coral transplant of iron-made reefs were 70% (survival rate) and 1.00 cm / month (growth rate), while artificial reefs were recorded had 50% (survival rate) and 0.93 cm / month (growth rate). Coral transplant growth rates on different substrates (iron and concrete) were not significantly different (P> 0.05). Keywords : Growth rate, Acropora sp, Transplantation, Artificial reef  ABSTRAKTujuan penelitian yaitu mengetahui tingkat keberhasilan hidup laju pertumbuhan karang Acropora sp yang ditransplantasi pada terumbu buatan yang berbeda (besi dan beton) di Perairan Kareko Kecamatan Lembeh Utara Kota Bitung.  Penelitian ini dilakukan pada bulan November 2016 – Februari 2017.  Pengambilan data dilakukan dengan penyelaman SCUBA dan menghitung jumlah transplant yang mati dan yang masi bertahan hidup serta mengukur pertambahan panjang mutlak setiap bulan.  Hasil penelitian menunjukan bahwa tingkat keberhasilan hidup dan laju pertumbuhan transplant pada terumbu buatan besi yaitu 70% (survival rate) dan 1.00 cm/bulan (laju pertumbuhan), sedangkan pada terumbu buatan beton yaitu 50% (survival rate) dan 0.93 cm/bulan (laju pertumbuhan).  Laju pertumbuhan transplant pada substrat yang berbeda (besi dan beton) tidak berbeda nyata (P>0.05). Kata Kunci: Laju pertumbuhan, Acropora sp, Transplantasi, Terumbu buatan

WAVE TRANSMITION, REFLECTION AND SET-UP PROPERTIES OF A NEWLY DEVELOPED PERMEABLE ARTIFICIAL REEF

2020 ◽  
Vol 76 (2) ◽  
pp. I_763-I_768
Author(s):  
Nobutoshi MIYAZATO ◽  
Eizo NAKAZA ◽  
Satoshi TANAKA ◽  
Masahiro FUKUMORI ◽  
Carolyn SCHAAB
Keyword(s):  
Artificial Reef ◽  
Set Up

scholarly journals Dual-polarimetric descriptors from Sentinel-1 GRD SAR data for crop growth assessment

2021 ◽  
Vol 178 ◽  
pp. 20-35
Author(s):  
Narayanarao Bhogapurapu ◽  
Subhadip Dey ◽  
Avik Bhattacharya ◽  
Dipankar Mandal ◽  
Juan M. Lopez-Sanchez ◽  
...  
Keyword(s):  
Crop Growth ◽  
Sar Data ◽  
Growth Assessment

Sediment transport modifications induced by submerged artificial reef systems: a case study for the Gulf of Venice

2014 ◽  
Vol 43 (1) ◽  
Author(s):  
Davide Bonaldo ◽  
Alvise Benetazzo ◽  
Andrea Bergamasco ◽  
Francesco Falcieri ◽  
Sandro Carniel ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Coastal Zone Management ◽  
Artificial Reef ◽  
Sediment Concentration ◽  
Quantitative Information ◽  
Small Scale ◽  
Zone Management ◽  
Basin Scale ◽  
Scale Modelling ◽  
Maritime Spatial Planning

AbstractThe shallow, gently sloping, sandy-silty seabed of the Venetian coast (Italy) is studded by a number of outcropping rocky systems of different size encouraging the development of peculiar zoobenthic biocenoses with considerably higher biodiversity indexes compared to neighbouring areas. In order to protect and enhance the growth of settling communities, artificial monolithic reefs were deployed close to the most important formations, providing further nesting sites and mechanical hindrance to illegal trawl fishing.In this framework, a multi-step and multi-scale numerical modelling activity was carried out to predict the perturbations induced by the presence of artificial structures on sediment transport over the outcroppings and their implications on turbidity and water quality. After having characterized wave and current circulation climate at the sub-basin scale over a reference year, a set of small scale simulations was carried out to describe the effects of a single monolith under different geometries and hydrodynamic forcings, encompassing the conditions likely occurring at the study sites. A dedicated tool was then developed to compose the information contained in the small-scale database into realistic deployment configurations, and applied in four protected outcroppings identified as test sites. With reference to these cases, under current meteomarine climate the application highlighted a small and localised increase in suspended sediment concentration, suggesting that the implemented deployment strategy is not likely to produce harmful effects on turbidity close to the outcroppings.In a broader context, the activity is oriented at the tuning of a flexible instrument for supporting the decision-making process in benthic environments of outstanding environmental relevance, especially in the Integrated Coastal Zone Management or Maritime Spatial Planning applications. The dissemination of sub-basin scale modelling results via the THREDDS Data Server, together with an user-friendly software for composing single-monolith runs and a graphical interface for exploring the available data, significantly improves the quantitative information collection and sharing among scientists, stakeholders and policy-makers.

Microborings and growth in Late Ordovician halysitids and other corals

1993 ◽  
Vol 67 (6) ◽  
pp. 922-934 ◽  
Author(s):  
Robert J. Elias ◽  
Dong-Jin Lee
Keyword(s):  
Growth Rate ◽  
Linear Growth ◽  
Inverse Correlation ◽  
Weight Percent ◽  
Late Ordovician ◽  
Coral Growth ◽  
Linear Growth Rate ◽  
Skeletal Density ◽  
Rugose Coral ◽  
Endolithic Algae

Microborings in the Late Ordovician tabulate corals Catenipora rubra (a halysitid) and Manipora amicarum (a cateniform nonhalysitid) and in an epizoic solitary rugose coral differ from nearly all of those previously reported in Paleozoic corals. These microborings were formed within the coralla by endolithic algae and fungi located beneath living polyps. Comparable structures in the Late Ordovician tabulate Quepora ?agglomeratiformis (a halysitid) represent algal microborings, not spicules, and halysitids are corals, not sponges as suggested by Kaźmierczak (1989).Endolithic algae in cateniform tabulates relied primarily on light entering through the outer walls of the ranks rather than through the polyps; lacunae within coralla permitted appropriate levels of light to reach many corallites. The direction of boring was determined by corallum microstructure and possibly also by the distribution of organic matter within the skeleton. There is an apparent inverse correlation between boring activity and coral growth rate.The location and relative abundance of pyritized microborings within calcareous coralla can be established quantitatively and objectively from electron microprobe determinations of weight percent sulfur along appropriate traverses of the coral skeleton. The distribution of such microborings in Catenipora rubra and Manipora amicarum is comparable to algal banding in modern corals; this is the first report of such banding in the interiors of Paleozoic corals. Change in the intensity of boring within each corallum was evidently a response to variation in the linear growth rate of the coral, or to fluctuation in an environmental factor (perhaps light intensity) that could control both algal activity and growth rate in these corals. Change in the algal boring intensity and linear growth rate of the coral was generally but not always seasonal and usually but not invariably associated with change in the density of coral skeletal deposition.Cyclic bands of boring abundance maxima within fossil colonial corals provide a measure of annual linear growth comparable to the widely accepted method based on skeletal density bands. Algal bands are more sporadically developed than density bands within and among coralla, thus increasing the difficulty of interpretation. Fluctuations in the abundance of algal microborings apparently provide a detailed record of changes in the linear growth rate of colonies and of individuals within colonies. Combined analyses of microboring abundance and skeletal density will contribute significantly to our understanding of the biological and environmental factors involved in endolithic activity and coral growth.

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