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204 results for “Scleractinian Coral”
Virgin Islands National Park: Coral Reef: Population Dynamics: Scleractinian corals
These data are evidence of the the long-term dynamics of shallow coral reefs along the south coast of St. John from as early as 1987. These data describe coral reef community structure as percent cover based on the analysis of color photographs. All of these data originate from color images of photoquadrats recorded annually (usually in the summer) from as early as 1987. The data falls into three groups. The two groups that are contained in this data package are (1) Tektite & Yawzi and (2) Random sites. The juvenile coral density is packaged separately. Tektite – this is at 14 m depth on the eastern side of Great Lameshur Bay and is the original site of the Tektite man-in-the sea project in 1969; this project marked the birth of the Virgin Islands Ecological Research Station (later the Virgin Islands Environmental Resource Station) that hosts the field component of the project. The reef in this location consists of a single buttress that has remained dominated by Montastraea anularis since the start of the research (1987). These surveys consist of 30 photoquadrats (1 x 1 m) distributed along three, 10 m transects. Yawzi – this is at 9 m depth and is on the western side of Great Lameshur Bay and has been recorded photographically since 1987. This reef also started the study period dominated by Montastraea annularis, but has degraded much more rapidly that the Tektite site. These surveys consist of 30 photoquadrats (1 x 1 m) distributed along three, 10 m transects. Random sites – were added in 1992 to address the concern that the original sites (Yawzi and Tektite) were selected on “good” areas of reef and, therefore, could only decline in condition. The Random sites were selected using random coordinates in 1992, and consist of 6 sites (at 7-9 m depth) scattered between Cabritte Point and White Point. All lie a little shoreward of Yawzi and Tektite, and have always been characterized by low coral cover (< 10% cover). The surveys consist of 18-40 photoquadrats (0.5 x 0
Virgin Islands National Park: Coral Reef: Population Dynamics: Scleractinian corals (Reformatted to the ecocomDP Design Pattern)
This data package is formatted as an ecocomDP (Ecological Community Data Pattern). For more information on ecocomDP see https://github.com/EDIorg/ecocomDP. This Level 1 data package was derived from the Level 0 data package found here: https://pasta.lternet.edu/package/metadata/eml/edi/291/2. The abstract below was extracted from the Level 0 data package and is included for context: These data are evidence of the the long-term dynamics of shallow coral reefs along the south coast of St. John from as early as 1987. These data describe coral reef community structure as percent cover based on the analysis of color photographs. All of these data originate from color images of photoquadrats recorded annually (usually in the summer) from as early as 1987. The data falls into three groups. The two groups that are contained in this data package are (1) Tektite & Yawzi and (2) Random sites. The juvenile coral density is packaged separately. Tektite – this is at 14 m depth on the eastern side of Great Lameshur Bay and is the original site of the Tektite man-in-the sea project in 1969; this project marked the birth of the Virgin Islands Ecological Research Station (later the Virgin Islands Environmental Resource Station) that hosts the field component of the project. The reef in this location consists of a single buttress that has remained dominated by Montastraea anularis since the start of the research (1987). These surveys consist of 30 photoquadrats (1 x 1 m) distributed along three, 10 m transects. Yawzi – this is at 9 m depth and is on the western side of Great Lameshur Bay and has been recorded photographically since 1987. This reef also started the study period dominated by Montastraea annularis, but has degraded much more rapidly that the Tektite site. These surveys consist of 30 photoquadrats (1 x 1 m) distributed along three, 10 m transects. Random sites – were added in 1992 to address the concern that the original sites (Yawzi and Tektite) were selected on “good” a
Virgin Islands National Park: Coral Reef: Population Dynamics: Landscape-scale Variation in Scleractinian Corals
This study provides a landscape-scale context to a decadal-scale analysis of community structure on shallow reefs along 4 km of the south shore of St. John, US Virgin Islands. By focusing on 12-14 sites along ~100 km of the shores of St. John and St. Thomas, surveys conducted in 2011 were used to contrast: (1) a local-scale with a landscape-scale analysis on two islands, (2) reefs around St. John and St. Thomas, and (3) reefs on north and south shores. Reefs were censused using photoquadrats that were analyzed for percentage cover first by functional groups (coral, macraolagae and CTB), and then by coral genus. In general, among-site variation for the coarse-resolution analysis eclipsed shore and island effects, but the fine-resolution analysis revealed strong site-specific differences for multiple coral genera that could be the product of priority effects in community succession. Over the next decade these differences probably will create unique community trajectories at each site.
Virgin Islands National Park: Coral Reef: Population Dynamics: Scleractinian corals (Reformatted to a Darwin Core Archive)
This data package is formatted as a Darwin Core Archive (DwC-A, event core). For more information on Darwin Core see https://www.tdwg.org/standards/dwc/. This Level 2 data package was derived from the Level 1 data package found here: https://pasta.lternet.edu/package/metadata/eml/edi/357/2, which was derived from the Level 0 data package found here: https://pasta.lternet.edu/package/metadata/eml/edi/291/2. The abstract below was extracted from the Level 0 data package and is included for context: These data are evidence of the the long-term dynamics of shallow coral reefs along the south coast of St. John from as early as 1987. These data describe coral reef community structure as percent cover based on the analysis of color photographs. All of these data originate from color images of photoquadrats recorded annually (usually in the summer) from as early as 1987. The data falls into three groups. The two groups that are contained in this data package are (1) Tektite & Yawzi and (2) Random sites. The juvenile coral density is packaged separately. Tektite – this is at 14 m depth on the eastern side of Great Lameshur Bay and is the original site of the Tektite man-in-the sea project in 1969; this project marked the birth of the Virgin Islands Ecological Research Station (later the Virgin Islands Environmental Resource Station) that hosts the field component of the project. The reef in this location consists of a single buttress that has remained dominated by Montastraea anularis since the start of the research (1987). These surveys consist of 30 photoquadrats (1 x 1 m) distributed along three, 10 m transects. Yawzi – this is at 9 m depth and is on the western side of Great Lameshur Bay and has been recorded photographically since 1987. This reef also started the study period dominated by Montastraea annularis, but has degraded much more rapidly that the Tektite site. These surveys consist of 30 photoquadrats (1 x 1 m) distributed along three, 10 m transects. Random sit
MCR LTER: Coral Reef: Effects of Flow and Temperature on Growth and Photophysiology of Scleractinian Corals in Moorea, French Polynesia
To test for threshold effects in the response of coral physiology to increasing seawater flow, field and laboratory experiments were conducted in Moorea. First, the growth of juvenile massive Porites spp. and branching P. irregularis was compared among habitats differing in water motion. Growth of massive Porites spp. responded to flow in a pattern consistent with a threshold effect, whereas growth of P. irregularis increased linearly with flow. Second, a recirculating flume was used to test the effect of flow on photophysiology (ΔF⁄Fm'), effective photochemical efficiency) for massive Porites spp.; ΔF⁄Fm' displayed a threshold response at 23 cm/sec and 28 °C, but not at 31 °C. Finally, intra-colony variation in the response of ΔF⁄Fm' to flow and temperature was explored to evaluate the functional significance of colony shape in small corals. ΔF⁄Fm' on the top and upstream surfaces of massive Porites spp. responded with a threshold effect of flow at 28 °C (but not 31 °C), but ΔF⁄Fm' on downstream surfaces was unresponsive to flow. ΔF⁄Fm' for P. irregularis was less responsive to flow than for massive Porites spp., suggesting that the photophysiological response of corals to varying flow speeds may differ between species and morphologies. Together, these results emphasize that flow can have diverse effects on the physiology of corals, with the outcome depending on flow speed, temperature, location on the colony, and perhaps morphology. These data were published in The Biological Bulletin and were part of the masters thesis of W. Goldenheim (2011).
FIGURE 8 in Four anchimolgid copepods (Poecilostomatoida: Anchimolgidae) associated with the scleractinian coral Pavona explanulata (Lamarck, 1816) in Taiwan
FIGURE 8. Sociellus subgeminus sp. nov. (female). A, habitus, dorsal; B, habitus, lateral; C, urosome; D, caudal ramus; E, antennule; F, antenna G, mandible; H, maxillule; I, maxilla; J, maxilliped. Scale bars: A – B = 0.2 mm; C = 0.1 mm; D – J = 0.02 mm.
FIGURE 5 in Four anchimolgid copepods (Poecilostomatoida: Anchimolgidae) associated with the scleractinian coral Pavona explanulata (Lamarck, 1816) in Taiwan
FIGURE 5. Odontomolgus cognatus sp. nov. (female). A, leg 1; B, leg 2; C, leg 3; D, leg 4; E, leg 5. Scale bars: A – E = 0.05 mm.
FIGURE 2 in Four anchimolgid copepods (Poecilostomatoida: Anchimolgidae) associated with the scleractinian coral Pavona explanulata (Lamarck, 1816) in Taiwan
FIGURE 2. Alienigena triangula gen. et sp. nov. (female). A, leg 2; B, leg 3; C, leg 4; D, leg 5; E, leg 6. Scale bars: A – E = 0.02 mm.
FIGURE 7. Odontomolgus mucosus Kim, 2006 in Four anchimolgid copepods (Poecilostomatoida: Anchimolgidae) associated with the scleractinian coral Pavona explanulata (Lamarck, 1816) in Taiwan
FIGURE 7. Odontomolgus mucosus Kim, 2006 (female: A – G; male: H – I). A, habitus, dorsal; B, antennule; C, mandible; D, maxillule; E, maxilla; F, maxilliped; G, leg 5; H, habitus, dorsal; I, male, maxilliped. Scale bars: A, H = 0.2 mm; B = 0.04 mm; C – F = 0.02 mm; G, I = 0.05 mm.
FIGURE 6 in Four anchimolgid copepods (Poecilostomatoida: Anchimolgidae) associated with the scleractinian coral Pavona explanulata (Lamarck, 1816) in Taiwan
FIGURE 6. Odontomolgus cognatus sp. nov. (male). A, habitus, dorsal; B, antenna; C, maxilliped; D, leg 1. Scale bars: A = 0.2 mm; B – D = 0.05 mm.
FIGURE 1 in Four anchimolgid copepods (Poecilostomatoida: Anchimolgidae) associated with the scleractinian coral Pavona explanulata (Lamarck, 1816) in Taiwan
FIGURE 1. Alienigena triangula gen. et sp. nov. (female). A, habitus, dorsal; B, habitus, lateral; C, urosome; D, caudal ramus; E, antennule; F, antenna; G, mandible; H, maxillule; I, maxilla; J, maxilliped; K, leg 1. Scale bars: A – B = 0.2 mm; C = 0.1 mm; D – K = 0.02 mm.
FIGURE 3 in Four anchimolgid copepods (Poecilostomatoida: Anchimolgidae) associated with the scleractinian coral Pavona explanulata (Lamarck, 1816) in Taiwan
FIGURE 3. Alienigena triangula gen. et sp. nov. (male). A, habitus, dorsal; B, habitus, lateral; C, maxilliped; D, leg 5; E, leg 6. Scale bars: A – B = 0.2 mm; C – E = 0.02 mm.
FIGURE 4 in Four anchimolgid copepods (Poecilostomatoida: Anchimolgidae) associated with the scleractinian coral Pavona explanulata (Lamarck, 1816) in Taiwan
FIGURE 4. Odontomolgus cognatus sp. nov. (female). A, habitus, dorsal; B, habitus, lateral; C, urosome; D, caudal ramus; E, antennule; F, antenna; G, mandible; H, maxillule; I, maxilla; J, maxilliped. Scale bars: A – C = 0.2 mm; D – F = 0.05 mm; G – J = 0.02 mm.
Population structure of the scleractinian coral, Montastraea cavernosa, in southeast Florida
The persistence of scleractinian coral populations on the Florida Reef Tract (FRT) is controlled in part by metapopulation dynamics and larval dispersal. Nine polymorphic microsatellite loci were analyzed to identify contemporary population structure and gene flow as well as historical migration rates of Montastraea cavernosa at five sites off Martin, Palm Beach, and Broward counties in southeast Florida. The sampled populations demonstrated evidence of genetic isolation by distance over a geographic range of 85 km. Population genetic structure was divided into two genetic clusters, northern and southern, with admixture along a latitudinal gradient. Historical migration models indicated likely panmixia throughout all sites sampled, identifying a potential reduction in connectivity among the sampled populations through time. Though M. cavernosa populations demonstrated evidence of historical connectivity, contemporary patterns of isolation by distance suggest that effective management will require localized actions to maximize the likelihood of sustaining individual populations in the northern FRT. Given the results of this study, coupled with recent coral mortality events in the region, we recommend regional conservation efforts and management initiatives throughout southeast Florida within a more comprehensive FRT-wide management network.
Mesophotic coral ecosystems of French Polynesia are hotspots of alpha and beta generic diversity for scleractinian assemblages
<p>Revealing how diversity varies across the depth gradient is key to understanding the role of mesophotic coral ecosystems in the functioning of coral reefs. We examined how alpha and beta generic diversity of scleractinian coral assemblages vary across a wide depth gradient for coral reefs. We studied generic diversity patterns of scleractinian corals at sixteen sites in eight islands of three archipelagos in French Polynesia, as derived from the analysis of photo-quadrats, across the seafloor from shallow to lower mesophotic depths (6 to 120 m) and on a wide geographic scale. Our sampling considered quantitative coral cover to explore the patterns of alpha and beta components of diversity across depth and horizontal space. We show that in French Polynesia, mesophotic coral ecosystems host higher alpha and beta generic diversity than shallow reefs despite decreasing coral cover with depth. The variation of coral genus richness across the depth gradient is mainly driven by a mid-domain effect with a peak at 40 m depth. At the same time, we found that the turnover of coral genera across islands (i.e., spatial beta diversity) increased steadily along the depth gradient. Our findings report the first quantitative results of coral cover and diversity from mesophotic coral ecosystems in French Polynesia and also present one of the few existing studies to examine the broad breadth of the mesophotic depth gradient. We demonstrate that mesophotic depths can host unexpectedly high generic richness of scleractinian coral assemblages. At the same time, we showed that increasing depth increases the differences in generic diversity composition across islands, whereas shallow reefs are similar in between. While a single island could conserve shallow regional biodiversity, mesophotic depths containing the richest diversity require site-specific measures, suggesting that considering these mesophotic depths in conservation is necessary to maintain regional diversity.</p>
Fig 2 in Diversity and distribution of scleractinian corals from Mandapam group of Islands in Gulf of Mannar marine national park, South East coast of India
Fig 2: Distribution of coral and associated fauna in Mandapam group of Islands in Gulf of Mannar Marine National Park
Fig 9A in Diversity and distribution of scleractinian corals from Mandapam group of Islands in Gulf of Mannar marine national park, South East coast of India
Fig 9A: Symphillia radians, B- Symphillia recta, C- Echinophyllia aspera, D- Pocillopora damicornis, E- Goniopora columna, F- Porites lutea, G- Porites solida, H- Psammocora nierstraszi
Fig 8A in Diversity and distribution of scleractinian corals from Mandapam group of Islands in Gulf of Mannar marine national park, South East coast of India
Fig 8A: Favites complanata, B- Favites halicora, C- Goniastrea minuta, D- Goniastrea sp., E- Platygyra acuta, F- Platygyra sp. G- Platygyra sp., H- Hydnophora microconus
Fig 5 in Diversity and distribution of scleractinian corals from Mandapam group of Islands in Gulf of Mannar marine national park, South East coast of India
Fig 5: Bray-Curtis Cluster analyses of life form categories recorded from the reef islands in Mandapam group, Gulf of Mannar Marina National Park. (SI –Shingle Island, KI – Kurusadai Island, PI – Pullivasal Island, POI – Poomarichan Island, MPI – Manoliputti Island, MI – Manoli Island, HI - Hare Island)
Fig 3 in Diversity and distribution of scleractinian corals from Mandapam group of Islands in Gulf of Mannar marine national park, South East coast of India
Fig 3: Principal Component Analyses (PCA) of life form categories recorded from the reef islands in Mandapam group, Gulf of Mannar Marina National Park. HC – Hard corals, SC- Soft coral, CB- Coral bleaching, AA-Algae, SP – Sponges, DC-Dead corals, RB-Rubbles, SD- Sand, SI – Silt, OT-Others, SI –Shingle Island, KI – Kurusadai Island, PI – Pullivasal Island, POI – Poomarichan Island, MPI – Manoliputti Island, MI – Manoli Island, HI - Hare Island.
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