Pub Date : 2024-10-30DOI: 10.1016/j.ecss.2024.109009
Johnna Brooks , Jeffrey Buckel , Jie Cao
Characterizing the abundance of fish over both space and time can be important to fisheries management. Spotted seatrout (Cynoscion nebulosus) are a warm-temperate estuarine-dependent species prevalent throughout the U.S. South Atlantic and Gulf of Mexico. In North Carolina and Virginia, they are at the species’ northern distributional extent and are therefore more susceptible to low temperature extremes in winter. In this study, we used a Vector Autoregressive Spatiotemporal model (VAST) to quantify the seasonal variation in the abundance and distribution of spotted seatrout within North Carolina waters and examine its relationship with the severity of cold stun events. We found that seasonal declines in relative abundance between the fall/winter and the following spring/summer periods is significantly correlated with low temperature events (i.e., numbers of days of water temperature below ), indicating cold stun events, depending on its scale and severity, have negative impacts on spotted seatrout population. Lastly, changes in the seasonal spatial density of spotted seatrout elucidated the spatial extent and scale of cold stun events. Together, these results corroborate previous findings that winter temperatures below increase natural mortality to the extent that lower abundance is observed at the population level.
{"title":"Quantifying intra-annual changes in abundance and distribution to identify the magnitude and scale of potential mortality events","authors":"Johnna Brooks , Jeffrey Buckel , Jie Cao","doi":"10.1016/j.ecss.2024.109009","DOIUrl":"10.1016/j.ecss.2024.109009","url":null,"abstract":"<div><div>Characterizing the abundance of fish over both space and time can be important to fisheries management. Spotted seatrout (Cy<em>noscion nebulosus</em>) are a warm-temperate estuarine-dependent species prevalent throughout the U.S. South Atlantic and Gulf of Mexico. In North Carolina and Virginia, they are at the species’ northern distributional extent and are therefore more susceptible to low temperature extremes in winter. In this study, we used a Vector Autoregressive Spatiotemporal model (VAST) to quantify the seasonal variation in the abundance and distribution of spotted seatrout within North Carolina waters and examine its relationship with the severity of cold stun events. We found that seasonal declines in relative abundance between the fall/winter and the following spring/summer periods is significantly correlated with low temperature events (i.e., numbers of days of water temperature below <span><math><mrow><mn>7</mn><mo>°C</mo></mrow></math></span>), indicating cold stun events, depending on its scale and severity, have negative impacts on spotted seatrout population. Lastly, changes in the seasonal spatial density of spotted seatrout elucidated the spatial extent and scale of cold stun events. Together, these results corroborate previous findings that winter temperatures below <span><math><mrow><mn>7</mn><mo>°C</mo></mrow></math></span> increase natural mortality to the extent that lower abundance is observed at the population level.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"311 ","pages":"Article 109009"},"PeriodicalIF":2.6,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-30DOI: 10.1016/j.ecss.2024.109013
Anaïs Janc , Chloé Dambrine , Patrick Lambert , Géraldine Lassalle , Mario Lepage , Jérémy Lobry , Maud Pierre , Trond Kristiansen , Momme Butenschön , Henrique N. Cabral
Marine-estuarine opportunist (MEO) species are fish that occur in the continental shelf and use estuaries and/or shallow coastal areas as nurseries. These commercially important resources are facing significant environmental modifications caused by direct and/or indirect anthropogenic climate change effects. In this study, we investigated the directionality and the magnitude of the distribution shifts (i.e., range size, gravity centroids, and margins) in marine environment suitability for six main MEO fish species within the Northeast Atlantic expected for the end of the 21st century. In the framework of this study, we have distinguished ‘sub-boreal’ from ‘sub-tropical’ species. The ‘hierarchical filters’ concept was adopted for modelling the potential species distributions and combined the predictions of i) a bioclimatic model with ii) a habitat model. The bioclimatic model is based on large-scale and time-variant variables while variables of the habitat model are fine-grained and time-invariant. Two Intergovernmental Panel on Climate Change (IPCC) scenarios are tested: an intermediate (SSP2-4.5) and a pessimistic one (SSP5-8.5). We applied this framework using international databases of biodiversity occurrences, ensemble forecasting producing consensual predictions, and innovative indices of distribution shifts. A visible north-westward shift was predicted for all six species in our study area. However, the northward expansion was greater for ‘sub-tropical’ than for ‘sub-boreal’ species due to faster gravity centroid displacement shifts and faster margins shifts. These range shifts may lead to major ecological impacts (e.g., changes in recruitment to estuarine and coastal nurseries, as well as changes in spawning grounds) that may alter populations' connectivity.
{"title":"Fish distribution shifts due to climate change in the Northeast Atlantic: Using a hierarchical filtering approach on marine-estuarine opportunist species","authors":"Anaïs Janc , Chloé Dambrine , Patrick Lambert , Géraldine Lassalle , Mario Lepage , Jérémy Lobry , Maud Pierre , Trond Kristiansen , Momme Butenschön , Henrique N. Cabral","doi":"10.1016/j.ecss.2024.109013","DOIUrl":"10.1016/j.ecss.2024.109013","url":null,"abstract":"<div><div>Marine-estuarine opportunist (MEO) species are fish that occur in the continental shelf and use estuaries and/or shallow coastal areas as nurseries. These commercially important resources are facing significant environmental modifications caused by direct and/or indirect anthropogenic climate change effects. In this study, we investigated the directionality and the magnitude of the distribution shifts (i.e., range size, gravity centroids, and margins) in marine environment suitability for six main MEO fish species within the Northeast Atlantic expected for the end of the 21st century. In the framework of this study, we have distinguished ‘sub-boreal’ from ‘sub-tropical’ species. The ‘hierarchical filters’ concept was adopted for modelling the potential species distributions and combined the predictions of i) a bioclimatic model with ii) a habitat model. The bioclimatic model is based on large-scale and time-variant variables while variables of the habitat model are fine-grained and time-invariant. Two Intergovernmental Panel on Climate Change (IPCC) scenarios are tested: an intermediate (SSP2-4.5) and a pessimistic one (SSP5-8.5). We applied this framework using international databases of biodiversity occurrences, ensemble forecasting producing consensual predictions, and innovative indices of distribution shifts. A visible north-westward shift was predicted for all six species in our study area. However, the northward expansion was greater for ‘sub-tropical’ than for ‘sub-boreal’ species due to faster gravity centroid displacement shifts and faster margins shifts. These range shifts may lead to major ecological impacts (e.g., changes in recruitment to estuarine and coastal nurseries, as well as changes in spawning grounds) that may alter populations' connectivity.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"310 ","pages":"Article 109013"},"PeriodicalIF":2.6,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1016/j.ecss.2024.109007
Emre Gülher , İlhan Pala , Ugur Alganci
The difficulty of defining the depth of near-shore seas (bathymetry) arises from the limits imposed by traditional ship-based approaches during data collection. Although LiDAR sensors with green lasers have been used to solve some of these problems, they come at a high cost in terms of their footprint and are prone to inaccuracies in turbid water. As shorelines undergo changes due to erosion, wetland loss, hurricane effects, sea-level rise, urban development, and population growth, consistent and accurate bathymetric data become crucial. These data play a significant role in comprehending and managing sensitive interfaces between land and water. Satellite-derived Bathymetry (SDB), which has been described by maritime and remote sensing researchers for over 50 years, emerges as a gap-filler, encompassing bathymetry extraction approaches using active (altimetry) and passive (optics) satellite sensors. In the past decade, advancements in sensor capabilities, computational power, and recognition by the International Hydrographic Organization (IHO) have propelled SDB to unprecedented popularity. This study explores the contribution of super-resolution in SDB for the first time in the shallow water zone of Horseshoe Island, Antarctica. Random forest and extreme gradient boosting machine learning-based regressors were used on Landsat-8 OLI images, which were atmospherically corrected by the ACOLITE algorithm and spatially enhanced twofold via the generative adversarial network for single image super-resolution (SRGAN). The bathymetry predictions with these two machine learning algorithms on SR images were benchmarked against previous studies in the same region and showed admissible results concerning the IHO standards. Furthermore, the results indicate that the bathymetric inversion performance of the spatially enhanced image via SRGAN is superior to the original multispectral image and pan-sharpened image in terms of the metrics observed, namely, root mean square error (RMSE), mean average error (MAE), and coefficient of determination (R2). Comparison between the original and SR image bathymetry inversion for the 0–15 m depth range indicate improvements of up to 0.13 m for RMSE, up to 0.30 m for MAE, and up to 11% for R2. These results promise possible effective usage of super-resolution in SDB with satellite images such as Sentinel −2, which do not include a panchromatic band.
{"title":"Assessing the contribution of super-resolution in satellite derived bathymetry in the Antarctic","authors":"Emre Gülher , İlhan Pala , Ugur Alganci","doi":"10.1016/j.ecss.2024.109007","DOIUrl":"10.1016/j.ecss.2024.109007","url":null,"abstract":"<div><div>The difficulty of defining the depth of near-shore seas (bathymetry) arises from the limits imposed by traditional ship-based approaches during data collection. Although LiDAR sensors with green lasers have been used to solve some of these problems, they come at a high cost in terms of their footprint and are prone to inaccuracies in turbid water. As shorelines undergo changes due to erosion, wetland loss, hurricane effects, sea-level rise, urban development, and population growth, consistent and accurate bathymetric data become crucial. These data play a significant role in comprehending and managing sensitive interfaces between land and water. Satellite-derived Bathymetry (SDB), which has been described by maritime and remote sensing researchers for over 50 years, emerges as a gap-filler, encompassing bathymetry extraction approaches using active (altimetry) and passive (optics) satellite sensors. In the past decade, advancements in sensor capabilities, computational power, and recognition by the International Hydrographic Organization (IHO) have propelled SDB to unprecedented popularity. This study explores the contribution of super-resolution in SDB for the first time in the shallow water zone of Horseshoe Island, Antarctica. Random forest and extreme gradient boosting machine learning-based regressors were used on Landsat-8 OLI images, which were atmospherically corrected by the ACOLITE algorithm and spatially enhanced twofold via the generative adversarial network for single image super-resolution (SRGAN). The bathymetry predictions with these two machine learning algorithms on SR images were benchmarked against previous studies in the same region and showed admissible results concerning the IHO standards. Furthermore, the results indicate that the bathymetric inversion performance of the spatially enhanced image via SRGAN is superior to the original multispectral image and pan-sharpened image in terms of the metrics observed, namely, root mean square error (RMSE), mean average error (MAE), and coefficient of determination (R<sup>2</sup>). Comparison between the original and SR image bathymetry inversion for the 0–15 m depth range indicate improvements of up to 0.13 m for RMSE, up to 0.30 m for MAE, and up to 11% for R<sup>2</sup>. These results promise possible effective usage of super-resolution in SDB with satellite images such as Sentinel −2, which do not include a panchromatic band.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"310 ","pages":"Article 109007"},"PeriodicalIF":2.6,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1016/j.ecss.2024.109008
William Dantas Charles , Christopher Aiken , Julie Robins , Adam Barnett , Nicole Flint
Connectivity is an essential driver for aquatic species distribution, genetic variability and stock structure. The giant mud crab (Scylla serrata) is a coastal portunid commonly associated with estuaries and mangrove systems. This species has been observed to undertake a seaward spawning migration, as the larval development is known to be more successful under the stable environmental conditions typically found in marine waters. The larvae return to the coastal areas through advection, where they are recruited and enter the estuaries after metamorphosing into the first instar. Here, we used numerical modelling to test hypotheses regarding probabilities of larval settlement of the giant mud crab and the effect of the distance offshore from which females release the eggs. Our scenarios considered the biological characteristics of larvae and oceanographic conditions for six locations for mud crabs along a complex coastline - the Queensland east coast, Australia. The models suggest that all locations tend to self-supply, and to exchange mud crab larvae with other regions, but in different magnitudes. The spawning distance offshore considerably affects larval distribution and settlement. The main drivers for larval advection in areas within the continental shelf are wind patterns and coastal currents, while offshore along the Australian continental slope, the main drivers are ocean currents. Self-recruitment is predominant, although we also observed a significant degree of connectivity between each location and the surrounding coastline. Short spawning migrations benefit self-recruitment in all scenarios, but long offshore migrations favour connectivity among different locations. This source/sink balance seems to depend on the local oceanographic features. Nevertheless, offshore spawning by the giant mud crab has the potential to provide for successful recruitment in a variety of environmental contexts. This study provides novel predictions of the probabilities of larval settlement for mud crab populations considering ocean advection that can be applied to different contexts.
{"title":"Implications of spawning migration patterns of the giant mud crab Scylla serrata (Forskål, 1775) on opportunities for larval dispersal","authors":"William Dantas Charles , Christopher Aiken , Julie Robins , Adam Barnett , Nicole Flint","doi":"10.1016/j.ecss.2024.109008","DOIUrl":"10.1016/j.ecss.2024.109008","url":null,"abstract":"<div><div>Connectivity is an essential driver for aquatic species distribution, genetic variability and stock structure. The giant mud crab (<em>Scylla serrata</em>) is a coastal portunid commonly associated with estuaries and mangrove systems. This species has been observed to undertake a seaward spawning migration, as the larval development is known to be more successful under the stable environmental conditions typically found in marine waters. The larvae return to the coastal areas through advection, where they are recruited and enter the estuaries after metamorphosing into the first instar. Here, we used numerical modelling to test hypotheses regarding probabilities of larval settlement of the giant mud crab and the effect of the distance offshore from which females release the eggs. Our scenarios considered the biological characteristics of larvae and oceanographic conditions for six locations for mud crabs along a complex coastline - the Queensland east coast, Australia. The models suggest that all locations tend to self-supply, and to exchange mud crab larvae with other regions, but in different magnitudes. The spawning distance offshore considerably affects larval distribution and settlement. The main drivers for larval advection in areas within the continental shelf are wind patterns and coastal currents, while offshore along the Australian continental slope, the main drivers are ocean currents. Self-recruitment is predominant, although we also observed a significant degree of connectivity between each location and the surrounding coastline. Short spawning migrations benefit self-recruitment in all scenarios, but long offshore migrations favour connectivity among different locations. This source/sink balance seems to depend on the local oceanographic features. Nevertheless, offshore spawning by the giant mud crab has the potential to provide for successful recruitment in a variety of environmental contexts. This study provides novel predictions of the probabilities of larval settlement for mud crab populations considering ocean advection that can be applied to different contexts.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"310 ","pages":"Article 109008"},"PeriodicalIF":2.6,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-24DOI: 10.1016/j.ecss.2024.109006
Angel Borja , Michael Elliott
{"title":"Do you want your paper published? – Then referee others! The view from seasoned editors","authors":"Angel Borja , Michael Elliott","doi":"10.1016/j.ecss.2024.109006","DOIUrl":"10.1016/j.ecss.2024.109006","url":null,"abstract":"","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"310 ","pages":"Article 109006"},"PeriodicalIF":2.6,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-22DOI: 10.1016/j.ecss.2024.109004
Trent Robinson
{"title":"Inspection of ghost crab (Ocypode quadrata) burrows with an articulating borescope: A tool to detect occupancy","authors":"Trent Robinson","doi":"10.1016/j.ecss.2024.109004","DOIUrl":"10.1016/j.ecss.2024.109004","url":null,"abstract":"","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"310 ","pages":"Article 109004"},"PeriodicalIF":2.6,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Submarine emissions of gases from hydrothermal vents alter the surrounding chemical environment, influencing species responses to the resulting environmental gradients. The 2011 underwater eruption of the Tagoro volcano off the coast of El Hierro in the Atlantic Ocean changed the physical and chemical conditions, impacting the distribution of pelagic fauna. Post-eruptive stages from 2013 to 2018 revealed changes in both benthic and pelagic communities, with continuous eruptions further affecting local carbon cycle through shifts in nutrient concentrations and isotopic composition. The lowest δ13C values in zooplanktonic primary consumers were found in areas directly influenced by the Tagoro submarine volcano. Although the mixing model results show that phytoplankton is the primary carbon source for copepods, contributing an average of 28.3% of their carbon, magmatic CO2 and seawater dissolved inorganic carbon each account for approximately 17–18%. The isotopic signatures reveal a gradient of enrichment in copepods, reflecting the influence of inorganic nutrient and gas emissions from the volcano's centre to its periphery within the marine ecosystem. This data is useful for understanding the worldwide significance of environmental stressors such as volcanic eruptions on marine organisms.
{"title":"Exploring marine zooplankton dynamics through carbon stable isotope signatures in a recently marine submarine volcano","authors":"Inma Herrera , Eugenio Fraile-Nuez , Enrique González-Ortegón","doi":"10.1016/j.ecss.2024.109005","DOIUrl":"10.1016/j.ecss.2024.109005","url":null,"abstract":"<div><div>Submarine emissions of gases from hydrothermal vents alter the surrounding chemical environment, influencing species responses to the resulting environmental gradients. The 2011 underwater eruption of the Tagoro volcano off the coast of El Hierro in the Atlantic Ocean changed the physical and chemical conditions, impacting the distribution of pelagic fauna. Post-eruptive stages from 2013 to 2018 revealed changes in both benthic and pelagic communities, with continuous eruptions further affecting local carbon cycle through shifts in nutrient concentrations and isotopic composition. The lowest δ<sup>13</sup>C values in zooplanktonic primary consumers were found in areas directly influenced by the Tagoro submarine volcano. Although the mixing model results show that phytoplankton is the primary carbon source for copepods, contributing an average of 28.3% of their carbon, magmatic CO<sub>2</sub> and seawater dissolved inorganic carbon each account for approximately 17–18%. The isotopic signatures reveal a gradient of enrichment in copepods, reflecting the influence of inorganic nutrient and gas emissions from the volcano's centre to its periphery within the marine ecosystem. This data is useful for understanding the worldwide significance of environmental stressors such as volcanic eruptions on marine organisms.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"310 ","pages":"Article 109005"},"PeriodicalIF":2.6,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-18DOI: 10.1016/j.ecss.2024.108992
Rahul Mehrotra , Pasicha Chaikaew , Elouise Haskin , Kirsty Magson , Chad M. Scott , Ruth Doherty
The waters of Thailand are associated with some of the most severe cases of envenomation from jellyfish in Asia, often attributed to the extensive marine recreational tourism industry it supports. The western Gulf of Thailand in particular has been shown to host among the highest abundances of box jellyfish, while also being home to some of the highest marine recreational tourism, such as along the Koh Samui archipelago. Here we utilise aspects of the same tourism industry to develop a deeper understanding of stinging jellyfish population dynamics, by combining citizen science at the island of Koh Tao, with dedicated in-situ surveys and remote sensing data. Our analyses of 170 box jellyfish sightings and 81 blooms of Pelagia sp. across a six-year period revealed a strong seasonal trend, with both groups being most abundant between July and December. Decision tree analysis of the complete observation dataset and multiple environmental variables revealed a combination of precipitation and lunar cycle to be the strongest predictors of the assessed stinging jellyfish at Koh Tao. Furthermore, blooms of Pelagia sp. were associated with extensive medusivory by a large diversity of predators, including reef building corals. These observations add to the growing literature showing that scleractinian corals are readily able to ingest larger prey items, either by solitary or protocooperative feeding strategies. Meanwhile, no consumption of box jellyfish medusae was recorded during the study. These findings may allow for improved tourism management practices while also supporting a wider biogeographic assessment of stinging jellyfish in south-east Asia.
{"title":"Environmental and ecological factors associated with stinging jellyfish at a tourism hotspot in the Gulf of Thailand","authors":"Rahul Mehrotra , Pasicha Chaikaew , Elouise Haskin , Kirsty Magson , Chad M. Scott , Ruth Doherty","doi":"10.1016/j.ecss.2024.108992","DOIUrl":"10.1016/j.ecss.2024.108992","url":null,"abstract":"<div><div>The waters of Thailand are associated with some of the most severe cases of envenomation from jellyfish in Asia, often attributed to the extensive marine recreational tourism industry it supports. The western Gulf of Thailand in particular has been shown to host among the highest abundances of box jellyfish, while also being home to some of the highest marine recreational tourism, such as along the Koh Samui archipelago. Here we utilise aspects of the same tourism industry to develop a deeper understanding of stinging jellyfish population dynamics, by combining citizen science at the island of Koh Tao, with dedicated in-situ surveys and remote sensing data. Our analyses of 170 box jellyfish sightings and 81 blooms of <em>Pelagia</em> sp. across a six-year period revealed a strong seasonal trend, with both groups being most abundant between July and December. Decision tree analysis of the complete observation dataset and multiple environmental variables revealed a combination of precipitation and lunar cycle to be the strongest predictors of the assessed stinging jellyfish at Koh Tao. Furthermore, blooms of <em>Pelagia</em> sp. were associated with extensive medusivory by a large diversity of predators, including reef building corals. These observations add to the growing literature showing that scleractinian corals are readily able to ingest larger prey items, either by solitary or protocooperative feeding strategies. Meanwhile, no consumption of box jellyfish medusae was recorded during the study. These findings may allow for improved tourism management practices while also supporting a wider biogeographic assessment of stinging jellyfish in south-east Asia.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"310 ","pages":"Article 108992"},"PeriodicalIF":2.6,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-18DOI: 10.1016/j.ecss.2024.108991
Ana Filipa Oliveira , Marta Monteiro , Joana Pereira , Ulisses M. Azeiteiro , Filipe Martinho , Miguel Ângelo Pardal , Sónia Cotrim Marques
Long-term temporal studies have been used to assess the effects of climate change on mysid populations and their complex ecological interplay within heterogeneous ecosystems. This study is the first to investigate the mysid community in the Mondego estuary, western Portugal, for a decade, from 2003 to 2012. Monthly data collected from five stations along the estuary was used to investigate variations in mysid assemblage composition, patterns, phenology, and the interactions with environmental variables. Thirteen taxa were found in the assemblages. The community was dominated by Mesopodopsis slabberi, which was found in great numbers in the upper estuarine region. Praunus flexuosus and Schistomysis spiritus dominated the assemblages in the middle estuary, while Gastrossacus spinifer and Heteromysis formosa were very abundant at the mouth of the estuary. Overall, mysids were mostly present during autumn periods, when local environmental factors such as water temperature and chlorophyll-a concentrations influenced assemblage abundances. The high productivity of the system played a pivotal role in fostering greater species abundance. However, lower abundances were detected during warmer years, further evidencing changes in these key species’ communities under future climatic scenarios of increasing water temperatures.
{"title":"Variability and composition of mysid assemblages in a northwest Iberian estuary: Insights from a 10-year data series","authors":"Ana Filipa Oliveira , Marta Monteiro , Joana Pereira , Ulisses M. Azeiteiro , Filipe Martinho , Miguel Ângelo Pardal , Sónia Cotrim Marques","doi":"10.1016/j.ecss.2024.108991","DOIUrl":"10.1016/j.ecss.2024.108991","url":null,"abstract":"<div><div>Long-term temporal studies have been used to assess the effects of climate change on mysid populations and their complex ecological interplay within heterogeneous ecosystems. This study is the first to investigate the mysid community in the Mondego estuary, western Portugal, for a decade, from 2003 to 2012. Monthly data collected from five stations along the estuary was used to investigate variations in mysid assemblage composition, patterns, phenology, and the interactions with environmental variables. Thirteen taxa were found in the assemblages. The community was dominated by <em>Mesopodopsis slabberi,</em> which was found in great numbers in the upper estuarine region. <em>Praunus flexuosus</em> and <em>Schistomysis spiritus</em> dominated the assemblages in the middle estuary, while <em>Gastrossacus spinifer</em> and <em>Heteromysis formosa</em> were very abundant at the mouth of the estuary. Overall, mysids were mostly present during autumn periods, when local environmental factors such as water temperature and chlorophyll-<em>a</em> concentrations influenced assemblage abundances. The high productivity of the system played a pivotal role in fostering greater species abundance. However, lower abundances were detected during warmer years, further evidencing changes in these key species’ communities under future climatic scenarios of increasing water temperatures.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"310 ","pages":"Article 108991"},"PeriodicalIF":2.6,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-16DOI: 10.1016/j.ecss.2024.108990
Lauren J. Stoot , Gregory S. Doran , Jason D. Thiem , Gavin L. Butler , An V. Vu , Lee J. Baumgartner
Ariids, or sea catfishes, inhabit marine, estuarine, and occasionally freshwater habitats circumtropically. They are most often locally abundant and are important in artisanal and commercial fisheries, particularly in developing countries. Detailed information on the ecology and habitat preferences of many of the genera within the family is lacking. We analysed the otolith of 57 blue catfish, Neoarius graeffei, collected from the lower reaches of the Clarence River, NSW, Australia with the aim of better understanding the species movement ecology, including its ability to respond to environmental change. Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) was used to quantify Sr:Ca, Ba:Ca and 87Sr:86Sr ratios in otoliths and infer lifetime movement patterns. Otolith microchemistry revealed inter-individual variation in the movement patterns of N. graeffei. A strong affinity for estuarine waters was evident among most individuals, with movement into upstream freshwater habitats for extended periods discernible in some individuals. Variation in movement patterns was identified by changes in Ba:Ca, Sr:Ca and 87Sr:86Sr otolith profiles, although Sr:Ca lacked clear patterns. Furthermore, both Ba:Ca and 87Sr:86Sr otolith transects revealed estuarine residence by juveniles, as well as multiple movements among chemically distinct areas throughout the lifetime of some individuals. Otolith microchemistry enabled elucidation of long-term movement patterns of N. graeffei in our study. Uncovering the variable movement patterns of a single species identifies the potential adaptable nature of other species within the Ariidae family and indicates N. graeffei is resilient to environmental changes and anthropogenic impacts.
鲶鱼又称海鲇，栖息于海洋、河口，偶尔也栖息于淡水生境。它们通常在当地资源丰富，在个体渔业和商业渔业中非常重要，尤其是在发展中国家。关于该科许多属的生态学和栖息地偏好的详细信息尚缺。我们分析了从澳大利亚新南威尔士州克拉伦斯河下游采集的 57 条蓝鲶（Neoarius graeffei）的耳石，目的是更好地了解该物种的运动生态，包括其应对环境变化的能力。利用激光烧蚀电感耦合等离子体质谱法（LA-ICP-MS）对耳石中的Sr:Ca、Ba:Ca和87Sr:86Sr比率进行量化，并推断其一生的移动模式。耳石微化学分析揭示了 N. graeffei 运动模式的个体间差异。大多数个体对河口水域的亲和力很强，但也有一些个体长期在上游淡水生境中活动。通过Ba:Ca、Sr:Ca和87Sr:86Sr耳石剖面图的变化可确定其运动模式的变化，但Sr:Ca缺乏明确的模式。此外，Ba:Ca 和 87Sr:86Sr 耳石横断面均显示幼体在河口居住，以及一些个体在一生中多次在化学性质不同的区域之间移动。在我们的研究中，耳石微化学研究有助于阐明 N. graeffei 的长期运动模式。揭示单一物种的多变运动模式，可以发现鮨科其他物种的潜在适应性，并表明鮨鱼对环境变化和人为影响具有很强的适应能力。
{"title":"Variation in lifetime movements of an Ariidae species in an eastern Australian river revealed by otolith microchemistry","authors":"Lauren J. Stoot , Gregory S. Doran , Jason D. Thiem , Gavin L. Butler , An V. Vu , Lee J. Baumgartner","doi":"10.1016/j.ecss.2024.108990","DOIUrl":"10.1016/j.ecss.2024.108990","url":null,"abstract":"<div><div>Ariids, or sea catfishes, inhabit marine, estuarine, and occasionally freshwater habitats circumtropically. They are most often locally abundant and are important in artisanal and commercial fisheries, particularly in developing countries. Detailed information on the ecology and habitat preferences of many of the genera within the family is lacking. We analysed the otolith of 57 blue catfish, Neoarius graeffei<em>,</em> collected from the lower reaches of the Clarence River, NSW, Australia with the aim of better understanding the species movement ecology, including its ability to respond to environmental change. Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) was used to quantify Sr:Ca, Ba:Ca and <sup>87</sup>Sr:<sup>86</sup>Sr ratios in otoliths and infer lifetime movement patterns. Otolith microchemistry revealed inter-individual variation in the movement patterns of <em>N. graeffei.</em> A strong affinity for estuarine waters was evident among most individuals, with movement into upstream freshwater habitats for extended periods discernible in some individuals. Variation in movement patterns was identified by changes in Ba:Ca, Sr:Ca and <sup>87</sup>Sr:<sup>86</sup>Sr otolith profiles, although Sr:Ca lacked clear patterns. Furthermore, both Ba:Ca and <sup>87</sup>Sr:<sup>86</sup>Sr otolith transects revealed estuarine residence by juveniles, as well as multiple movements among chemically distinct areas throughout the lifetime of some individuals. Otolith microchemistry enabled elucidation of long-term movement patterns of <em>N. graeffei</em> in our study. Uncovering the variable movement patterns of a single species identifies the potential adaptable nature of other species within the Ariidae family and indicates <em>N. graeffei</em> is resilient to environmental changes and anthropogenic impacts.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"310 ","pages":"Article 108990"},"PeriodicalIF":2.6,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号