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19 results for “reef zones”
Data for: Benthic drivers of structural complexity in coral reefs across a tropical-subtropical transition zone
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Allen Coral Atlas maps of the benthic cover and geomorphic zones of coral reefs in western Micronesia
<p>This dataset includes shapefiles of classification of benthic cover and geomorphic zones of the shallow coral reefs in the area of western Micronesia. The boundary of the mapped area is included in the dataset. <br> <br> This is a subset of the Allen Coral Atlas global coral reef mapping dataset. Mapping methodology, other datasets and a full list of contributors are available at <a href="https://www.allencoralatlas.org/">https://www.allencoralatlas.org/</a>. Further guidance on licensing and citation can be found at <a href="https://github.com/CoralMapping/AllenCoralAtlas">https://github.com/CoralMapping/AllenCoralAtlas</a></p>
Data from: Habitat change and its consequences on reef fish specialization in biogeographic transition zones
<p><strong><em>Aim</em></strong> <span>Reef fishes are commonly recognized as sentinels of the ongoing tropicalization in biogeographic transition zones between temperate and tropical areas. Despite the reliance of these marine </span><span>ectotherms</span><span> on the benthos, the importance of benthic habitat has rarely been considered as a factor constraining fish distribution. Therefore, our study aims at examining the</span><span> consequences of both temperature and benthic variations on the fish fauna and diagnosing potential sentinels of these environmental changes.</span> </p> <p><strong><em>Location</em></strong> <span>Taiwan, West Pacific. </span></p> <p><strong><em>Taxon</em></strong> Teleostei (184 species).</p> <p><strong><em>Methods</em></strong> <span>We examined how the partitioning of habitats can influence the specialization of fish fauna along a latitudinal gradient. We diagnosed 'specialist' and 'generalist' fishes in this partitioning. For each specialist, we further evaluated whether its distribution is constrained by temperature, benthic habitat, or both factors combined. The change in sea surface temperature over the last three decades was also monitored. </span></p> <p><strong><em>Results</em></strong> <span>Fish fauna showed the highest specialization when tropical and subtropical partitions of habitat were considered. Fifty-one tropical specialists, seven subtropical specialists, and 21 possible generalists were identified. Among specialists, </span><span>13 species were associated with temperature, 19 with habitat, and 26 with both factors. </span><span>Steady warming occurred across latitudes but was accentuated in the winter of subtropical habitat.</span> </p> <p><strong><em>Main conclusions</em></strong> <span>Our results suggested that the distribution of some specialist fishes was constrained only by temperature while the distribution of some others also depended on the availability of benthic habitats. Consequently, under global warming, the distribution of some specialists might shift in a manner that follows the movement of isotherms, while the distribution of others might also be conditioned by the poleward shifts of benthos. A temporal mismatch between the emergence of suitable thermal environments and the arrival of some specialists may exist. Therefore, the tropicalization of high-latitude areas may be characterized by different waves of colonization. </span></p>
Geographic Zone Report for AR.docx: a summary of REEF surveys for Alligator Reef from 1 January 1993 to 7 February 2016.
<p>Geographic Zone Report for AR.docx: a summary of REEF surveys for Alligator Reef from 1 January 1993 to 7 February 2016. from </p> <p>Starck, W.A., Estapé C.J. & Morgan Estapé, A. (2017) The fishes of Alligator Reef and environs in the Florida Keys: a half-century update. Journal of the Ocean Science Foundation, 27, 74–117.<br> </p>
TimeFISH: Long-term assessment of reef fish assemblages in a transition zone in the Southwestern Atlantic
<p>The TimeFish database provides the first public time-series dataset on reef fish assemblages in the Southwestern Atlantic (SWA), comprising 15 years of data (2007-2022) based on standardized Underwater Visual Censuses (UVCs). The rocky reefs covered by our dataset are influenced by pronounced seasonal cycles of ocean temperatures with warm tropical waters from the Brazil Current in the summer (~27°C) and colder waters from the La Plata River Plume discharge and upwelling from the South Atlantic Central Water in the winter (~18°C). These oceanographic conditions characterize this area as the southernmost tropical-subtropical climatic transition zone in the Atlantic Ocean. As a result, reef fish assemblages comprise both tropical and subtropical species. All records included in TimeFish were collected using UVCs, a non-destructive method that allows the estimation of fish species richness, abundance, and body size distributions. UVCs were performed through 40 m2 belt transects by scuba diving in nine locations along the southern Brazilian coast (25°S – 29°S). Four of these locations lie within the boundaries of the no-entry Arvoredo Marine Biological Reserve, where fishing and recreational activities are forbidden, and the remaining locations are unprotected from these activities. During each belt transect, a diver swam at a constant depth above and parallel to the reef, identifying fish species, counting the number of individuals, and estimating the total body length (Lt in cm) of all detected individuals. All fish individuals in the water column (up to 2 m above the substratum) and at the bottom were targeted. A total of 202,965 individuals belonging to 163 reef fish species and 53 families were recorded across 1,857 UVCs. All survey campaigns were funded by either public or mixed capital (private-public) sources, including seven grants from the Brazilian federal and Santa Catarina state government. Part of the data have already been used in multiple MSc and Ph.D. theses and scientific articles. TimeFISH represents an important contribution for future studies aiming to examine temporal and spatial variations of reef fish assemblages in transition zones. No copyright restrictions apply to the use of this data set, other than citing this publication.</p>
Data from: Habitat change and its consequences on reef fish specialization in biogeographic transition zones
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Figure 3 in Planktonic copepod community of a reef zone in the southern Gulf of Mexico
Figure 3. Canonical Correlation Analysis (CCA) between abundance of copepod species and their relation to temperature (T) and salinity (S). Species abbreviations are Table 2.
Figure 1 in Planktonic copepod community of a reef zone in the southern Gulf of Mexico
Figure 1. Location of the study area transects and sampling stations in the PNSAV. Clr, Coastline region; NCz, North Central zone; Crr, Central region reef; Nz, North zone; Orr, Outer region reef; SCz, South Central zone; Sz, South zone.
Data from: Repeated invasions into the twilight zone: evolutionary origins of a novel assemblage of fishes from deep Caribbean reefs
Mesophotic and deeper reefs of the tropics are poorly known and underexplored ecosystems worldwide. Collectively referred to as the 'twilight zone', depths below ~30–50 m are home to many species of reef fishes that are absent from shallower depths, including many undescribed and endemic species. We currently lack even a basic understanding of the diversity and evolutionary origins of fishes on tropical mesophotic reefs. Recent submersible collections in the Caribbean have provided new specimens that are enabling phylogenetic reconstructions that incorporate deep-reef representatives of tropical fish genera. Here, we investigate evolutionary depth transitions in the family Gobiidae (gobies), the most diverse group of tropical marine fishes. Using divergence-time estimation coupled with stochastic character mapping to infer the timing of shallow-to-deep habitat transitions in gobies, we demonstrate at least four transitions from shallow to mesophotic depths. Habitat transitions occurred in two broad time periods (Miocene, Pliocene–Pleistocene), and may have been linked to the availability of underutilized niches, as well as the evolution of morphological/behavioural adaptations for life on deep reefs. Further, our analysis shows that at least three evolutionary lineages that invaded deep habitats subsequently underwent speciation, reflecting another unique mode of radiation within the Gobiidae. Lastly, we synthesize depth distributions for 95 species of Caribbean gobies, which reveal major bathymetric faunal breaks at the boundary between euphotic and mesophotic reefs. Ultimately, our study is the first rigorous investigation into the origin of Caribbean deep-reef fishes and provides a framework for future studies that utilize rare, deep-reef specimens.
Reef fish assemblage through space and time in a thermal transition zone in the southwestern Atlantic
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FIGURE 1. Raripagurus roseangelae n. gen., n in A new genus and species of micro-pagurid hermit crab (Crustacea, Decapoda, Paguridae) from the rariphotic reef zone in Curaçao Lesser Antilles, Caribbean Sea
FIGURE 1. Raripagurus roseangelae n. gen., n. sp., female holotype, cephalic shield 1.8 mm, USNM 1554278: A, cephalic shield and cephalic appendages, dorsal; B, right cheliped, dorsal; C, same, ventral; D, left cheliped, dorsal; E, uropods and telson, dorsal; F, telson, dorsal. Scale bars = 0.5 mm (A); 1.0 mm (B–D); 0.25 mm (E); 0.2 mm (F).
FIGURE 3. Raripagurus roseangelae n. gen., n in A new genus and species of micro-pagurid hermit crab (Crustacea, Decapoda, Paguridae) from the rariphotic reef zone in Curaçao Lesser Antilles, Caribbean Sea
FIGURE 3. Raripagurus roseangelae n. gen., n. sp., female holotype cephalic shield 1.8 mm, USNM 1554278: A, left dorsolateral; B, right lateral.
FIGURE 2. Raripagurus roseangelae n. gen., n in A new genus and species of micro-pagurid hermit crab (Crustacea, Decapoda, Paguridae) from the rariphotic reef zone in Curaçao Lesser Antilles, Caribbean Sea
FIGURE 2. Raripagurus roseangelae n. gen., n. sp., female holotype, cephalic shield 1.8 mm, USNM 1554278: A, right pereopod 2, lateral; B, right pereopod 3, lateral; C, sternum, coxae of pereopods 1–5, and first pair of pleopods (gonopods); D, right pereopod 4, lateral; E, propodus and dactyl of same, lateral; F, propodus and dactyl of right pereopod 5, lateral. Scale bars = 1.0 mm (A–D); 0.4 mm (E, F).
Data from: High species richness and lineage diversity of reef corals in the mesophotic zone
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Data from: Repeated invasions into the twilight zone: evolutionary origins of a novel assemblage of fishes from deep Caribbean reefs
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Data from: Population genetics of a broadcast-spawning coral across a tropical-temperate transition zone reveals regional differentiation and isolation of high-latitude reefs
<p>Aim: Genetic connectivity is a key component of species resilience to climate change in terms of recovery capacity following disturbance and capacity to disperse to novel locations as the climate warms and isotherms shift poleward. We aimed to strengthen our understanding of resilience in this context by characterizing patterns of connectivity and genetic diversity in a broadcast spawning coral across a tropical-temperate transition zone. We hypothesize genetic differentiation between tropical and temperate populations and decreasing genetic diversity with higher latitudes.</p> <p>Location: Western Australia (WA).</p> <p>Taxon: <i>Turbinaria </i>species complex. <i>Turbinaria reniformis </i>Oken, 1815 (Dendrophylliidae).</p> <p>Methods: Samples from 930 target corals were collected from ten locations between 13 - 32<sup> o</sup> latitude spanning a 9° C mean temperature range. <i>In-situ</i> species identification of <i>T. reniformis </i>is hindered by morphological plasticity and homoplasy with sister species. We<i> </i>combined Sanger sequencing of two mitochondrial DNA markers and high-throughput genotyping by sequencing (GBS) to isolate a single genetic <i>Turbinaria</i> lineage from our dataset through which patterns of genetic flow and diversity along the WA coastline could be explored using population- and individual-based analyses.</p> <p>Results: Mitochondrial DNA sequence variation was low among <i>Turbinaria</i> samples and could not resolve individual species. Using GBS, we identified three genetically distinct lineages. Subsequent analyses within one of these lineages revealed strong spatial subdivision with 2-3 genetic clusters. While temperate populations were genetically diverged from more tropical sites, we did not observe declines in genetic diversity with latitude.</p> <p>Main Conclusions: Temperate coral populations in Western Australia are genetically isolated from their tropical counterparts. Tropical populations of <i>T. 'reniformis' </i>exhibit adequate connectivity.<i> </i>Shark Bay represents the current southern limit of the tropical population of <i>T. 'reniformis'</i>. Interestingly, temperate <i>T. 'reniformis'</i> in this study exhibit some genetic resilience due to their relatively high genetic diversity, yet the strong patterns of genetic subdivision for this widely dispersing coral species potentially limit their resilience to future climate scenarios.</p>
Small invertebrate consumers produce consistent size spectra across reef habitats and climatic zones
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Data from: Population genetics of a broadcast-spawning coral across a tropical-temperate transition zone reveals regional differentiation and isolation of high-latitude reefs
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Figure 2 in Planktonic copepod community of a reef zone in the southern Gulf of Mexico
Figure 2. Relation between frequency of occurrence and abundance of copepod species per sampling year in the PNSAV.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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