scholarly journals Factors Affecting Terrigenous Sedimentation in Coastal Bays with Coral Reefs: Implications for Monitoring the Effectiveness of Watershed Restoration

2015 ◽  
Author(s):  
Whitney Sears
Keyword(s):  
Coral Reefs ◽  
Watershed Restoration ◽  
Factors Affecting ◽  
Coastal Bays ◽  
Terrigenous Sedimentation

Importance of philopatry and hydrodynamics in the recruitment of bioeroding sponges on Indonesian coral reefs

2019 ◽  
Vol 70 (6) ◽  
pp. 755
Author(s):  
Joseph Marlow ◽  
Abdul Haris ◽  
James Bell
Keyword(s):  
Coral Reefs ◽  
Large Scale ◽  
Species Assemblage ◽  
Coral Mortality ◽  
Factors Affecting ◽  
Larval Recruitment ◽  
Spatial Coverage ◽  
Reef Degradation ◽  
Adult Abundance ◽  
Cliona Orientalis

Increasingly frequent large-scale coral mortality events are occurring across the globe, leading to a rise in available reef substrata and promoting an increase in the abundance of other benthic taxa. One such group are bioeroding sponges, which can benefit considerably from reef degradation. However, the occupation of new substrates is partially reliant upon larval recruitment, and currently little is known about the factors affecting bioeroding sponge recruitment. In this study we investigated the potential drivers of bioeroding sponge recruitment using a 2-year deployment of experimental calcareous substrates across seven reefs in the Wakatobi region of Indonesia. Recruitment was observed for five bioeroding sponge species, namely Cliona orientalis, Cliothosa cf. aurivillii, Cliothosa hancocki and two presently unidentified brown clionaids, Cliona aff. viridis sp. A and Cliona aff. viridis sp. B. Recruits were present on 69% of the experimental substrates but had a low mean (±s.e.m.) spatial coverage of just 0.42±0.13%. Total recruitment and species assemblage structure were correlated with local adult abundance, water flow and substrate cues. Our results suggest that any proliferation of bioeroding sponges on newly available substrate following coral mortality is likely to be conditional on local adult abundance and hydrodynamics.

scholarly journals Fish Composition and Diversity of Four Coral Reefs in the South China Sea Based on Hand-Line Catch

2021 ◽  
Vol 10 (1) ◽  
pp. 38
Author(s):  
Yuanjie Li ◽  
Zuozhi Chen ◽  
Jun Zhang
Keyword(s):  
South China Sea ◽  
Coral Reefs ◽  
South China ◽  
Dominant Species ◽  
The South China Sea ◽  
Fish Diversity ◽  
The South ◽  
Factors Affecting ◽  
China Sea ◽  
Sea Fish

To improve the overall understanding of the fish diversity and spatial patterns of major coral reefs in the South China Sea, fish assemblage composition, dominant species, biodiversity indices, and multivariate analysis of community structure were reported for four major coral reefs based on hand-line survey data in May and September 2018. A total of five orders, 21 families, 45 genera and 121 species of fish were recorded with Perciformes (78.5%) being the most diverse. The highest number (5) of dominant species was found near Chenhang Island while the lowest (2) number was detected at Zhubi Reef. The highest abundance index (7.21) occurred at Zhubi Reef, while the Shannon–Wiener diversity (4.80), Pielou’s evenness (0.81), and Simpson’s dominance (0.95) indexes were all highest at Qiliangyu Island. Based on cluster analysis and non-metric multi-dimensional scaling (NMDS), fish communities varied more spatially than seasonally. Our results led us to hypothesize that the habitat complexity and level of anthropogenic disturbance were the main factors affecting the composition of reef-dwelling fish on each coral reef. Topography was likely responsible for most variation in the spatial pattern of fish diversity.

scholarly journals Fluctuations of wind and temperature fields in Ninh Thuan - Binh Thuan waters and its possible relationship with coral bleaching

2021 ◽  
Vol 20 (4A) ◽  
pp. 1-10
Author(s):  
Tran Van Chung ◽  
Ngo Manh Tien ◽  
Cao Van Nguyen
Keyword(s):  
Coral Reefs ◽  
Coral Bleaching ◽  
Wind Field ◽  
Sea Water ◽  
Sea Surface ◽  
Temperature Fields ◽  
Factors Affecting ◽  
Research Results ◽  
Major Threat ◽  
Weak Wind

Temperature and wind on the sea surface are factors affecting the development of coral reefs in the seawaters. The research results show that the warming of sea water under the condition of weak wind field is considered a major threat to the bleaching of coral reefs in the sea areas of the Ninh Thuan - Binh Thuan provinces.

Factors affecting tolerance to herbivory in a calcifying alga on coral reefs

2017 ◽  
Vol 164 (2) ◽  
Author(s):  
Carolina Castro-Sanguino ◽  
Catherine Lovelock ◽  
Peter J. Mumby
Keyword(s):  
Coral Reefs ◽  
Factors Affecting

Factors Affecting Distribution of Gulls (Larus spp.) on Two New Jersey Coastal Bays

1987 ◽  
Vol 14 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Joanna Burger ◽  
Joan Galli
Keyword(s):  
New Jersey ◽  
Human Disturbance ◽  
Dominant Species ◽  
Delaware Bay ◽  
The Other ◽  
Factors Affecting ◽  
Coastal Bays ◽  
Herring Gulls ◽  
Laughing Gulls

The distribution and abundance of gulls were examined on Raritan and Delaware Bays from 20 April to 26 October 1982. Gull numbers were affected by seasonal, tidal, weather-related, and human disturbance, factors on both Bays. Gulls comprised from about 40 to 60% of the avifauna on the census areas, and shorebirds accounted for most of the other individuals. Peak numbers of gulls were present on Delaware Bay from May through July, and on Raritan Bay in September. Laughing Gulls (Larus atricilla) were the dominant species on both Raritan (90%) and Delaware (70%) Bays, with Herring Gulls (L. argentatus) second in abundance.

Progress In The Practical Application Of Automated Image Analysis To Tem Negatives

1977 ◽  
Vol 35 ◽  
pp. 214-217
Author(s):  
F. A. Heckman ◽  
E. Redman ◽  
J.E. Connolly
Keyword(s):  
Image Analysis ◽  
Image Quality ◽  
Exposure Time ◽  
Image Contrast ◽  
Automated Image Analysis ◽  
Practical Application ◽  
Factors Affecting ◽  
High Image Quality ◽  
Qualitative Evidence ◽  
Comprehensive Study

In our initial publication on this subject1) we reported results demonstrating that contrast is the most important factor in producing the high image quality required for reliable image analysis. We also listed the factors which enhance contrast in order of the experimentally determined magnitude of their effect. The two most powerful factors affecting image contrast attainable with sheet film are beam intensity and KV. At that time we had only qualitative evidence for the ranking of enhancing factors. Later we carried out the densitometric measurements which led to the results outlined below.Meaningful evaluations of the cause-effect relationships among the considerable number of variables in preparing EM negatives depend on doing things in a systematic way, varying only one parameter at a time. Unless otherwise noted, we adhered to the following procedure evolved during our comprehensive study:Philips EM-300; 30μ objective aperature; magnification 7000- 12000X, exposure time 1 second, anti-contamination device operating.

Factors affecting microstructural scale in liquid crystalline polymers

1990 ◽  
Vol 48 (4) ◽  
pp. 220-221
Author(s):  
Christine M. Dannels ◽  
Christopher Viney
Keyword(s):  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Factors Affecting ◽  
Crystalline Polymers ◽  
Thermal Expansion Coefficients ◽  
Low Thermal Expansion ◽  
Lower Viscosity ◽  
Fine Microstructure ◽  
Planar Orientation ◽  
Strength And Stiffness

Processing polymers from the liquid crystalline state offers several advantages compared to processing from conventional fluids. These include: better axial strength and stiffness in fibers, better planar orientation in films, lower viscosity during processing, low solidification shrinkage of injection moldings (thermotropic processing), and low thermal expansion coefficients. However, the compressive strength of the solid is disappointing. Previous efforts to improve this property have focussed on synthesizing stiffer molecules. The effect of microstructural scale has been overlooked, even though its relevance to the mechanical and physical properties of more traditional materials is well established. By analogy with the behavior of metals and ceramics, one would expect a fine microstructure (i..e. a high density of orientational defects) to be desirable.Also, because much microstructural detail in liquid crystalline polymers occurs on a scale close to the wavelength of light, light is scattered on passing through these materials.

Factors affecting dentist participation in a state Medicaid program

1990 ◽  
Vol 54 (11) ◽  
pp. 638-643 ◽  
Author(s):  
PC Damiano ◽  
ER Brown ◽  
JD Johnson ◽  
JP Scheetz
Keyword(s):  
Medicaid Program ◽  
Factors Affecting
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