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Long-Term Patterns Of An Interconnected Core Marine Microbiota, Anders K. Krabberød, Ina M. Deutschmann, Marit F. M. Bjorbækmo, Vanessa Balagué, Caterina R. Giner, Isabel Ferrera, Esther Garcés, Ramon Massana, Josep M. Gasol, Ramiro Logares 2022 Edith Cowan University

Long-Term Patterns Of An Interconnected Core Marine Microbiota, Anders K. Krabberød, Ina M. Deutschmann, Marit F. M. Bjorbækmo, Vanessa Balagué, Caterina R. Giner, Isabel Ferrera, Esther Garcés, Ramon Massana, Josep M. Gasol, Ramiro Logares

Research outputs 2022 to 2026

Background Ocean microbes constitute ~ 70% of the marine biomass, are responsible for ~ 50% of the Earth’s primary production and are crucial for global biogeochemical cycles. Marine microbiotas include core taxa that are usually key for ecosystem function. Despite their importance, core marine microbes are relatively unknown, which reflects the lack of consensus on how to identify them. So far, most core microbiotas have been defined based on species occurrence and abundance. Yet, species interactions are also important to identify core microbes, as communities include interacting species. Here, we investigate interconnected bacteria and small protists of the core pelagic microbiota ...


Wildfires Enhance Phytoplankton Production In Tropical Oceans, Dongyan Liu, Chongran Zhou, John K. Keesing, Oscar Serrano, Axel Werner, Yin Fang, Yingjun Chen, Pere Masque, Janine Kinloch, Aleksey Sadekov, Yan Du 2022 Edith Cowan University

Wildfires Enhance Phytoplankton Production In Tropical Oceans, Dongyan Liu, Chongran Zhou, John K. Keesing, Oscar Serrano, Axel Werner, Yin Fang, Yingjun Chen, Pere Masque, Janine Kinloch, Aleksey Sadekov, Yan Du

Research outputs 2022 to 2026

Wildfire magnitude and frequency have greatly escalated on a global scale. Wildfire products rich in biogenic elements can enter the ocean through atmospheric and river inputs, but their contribution to marine phytoplankton production is poorly understood. Here, using geochemical paleo-reconstructions, a century-long relationship between wildfire magnitude and marine phytoplankton production is established in a fire-prone region of Kimberley coast, Australia. A positive correlation is identified between wildfire and phytoplankton production on a decadal scale. The importance of wildfire on marine phytoplankton production is statistically higher than that of tropical cyclones and rainfall, when strong El Niño Southern Oscillation coincides with ...


Why New Zealand’S Indigenous Reconciliation Process Has Failed To Empower Māori Fishers: Distributional, Procedural, And Recognition-Based Injustices, Hekia Bodwitch, Andrew M. Song, Owen Temby, John Reid, Megan Bailey, Gordon M. Hickey 2022 The University of Texas Rio Grande Valley

Why New Zealand’S Indigenous Reconciliation Process Has Failed To Empower Māori Fishers: Distributional, Procedural, And Recognition-Based Injustices, Hekia Bodwitch, Andrew M. Song, Owen Temby, John Reid, Megan Bailey, Gordon M. Hickey

Earth, Environmental, and Marine Sciences Faculty Publications and Presentations

How is it that the New Zealand government’s process for re-establishing Indigenous fishing rights has failed to deliver thriving Māori fisheries? This paper examines why, at Te Waihora, a coastal lake, and site of one of the nation’s longest running and best-funded state-Māori co-governance agreements, Māori fishers have been unable to use their rights to support their fishery. As of 2018, the lake’s culturally and ecologically significant eel population was no longer commercially viable, a decline fishers have attributed to rampant dairy industry expansion upstream. Drawing on environmental justice literatures, we deploy a multi-dimensional framework to identify ...


Fine Particulate Matter Concentrations During Independence Day Fireworks Display In The Lower Rio Grande Valley Region, South Texas, Usa, Esmeralda Mendez, Owen Temby, Dawid Wladyka, Katarzyna Sepielak, Amit U. Raysoni 2022 The University of Texas Rio Grande Valley

Fine Particulate Matter Concentrations During Independence Day Fireworks Display In The Lower Rio Grande Valley Region, South Texas, Usa, Esmeralda Mendez, Owen Temby, Dawid Wladyka, Katarzyna Sepielak, Amit U. Raysoni

Earth, Environmental, and Marine Sciences Faculty Publications and Presentations

Fireworks are typically discharged as a mark of celebration and joy in many societies spanning various cultures. In the United States of America, 4th July is celebrated as the Independence Day when the nation overthrew the British colonial yoke in 1776. While this day instills a sense of patriotism in every American’s heart, it is also a major PM2.5 air pollution concern. This study is first of its type in the Lower Rio Grande Valley (RGV) Region of South Texas, USA, that characterizes fine particulate matter pollution. Using a low-cost sensor (TSI BlueSky Air Quality Monitor), real-time PM2 ...


Caulerpa Chemnitzia In Darwin Threatening Galapagos Coral Reefs, Inti Keith, William Bensted-Smith, Stuart Banks, Jenifer Suarez, Bernhard Riegl 2022 Charles Darwin Research Station - Galapagos, Ecuador

Caulerpa Chemnitzia In Darwin Threatening Galapagos Coral Reefs, Inti Keith, William Bensted-Smith, Stuart Banks, Jenifer Suarez, Bernhard Riegl

Marine & Environmental Sciences Faculty Articles

Coral reefs are rare in the Galapagos and there is concern that, like in many areas around the world, they may be degrading due to increasing anthropogenic pressure, which can cause changes and reorganizations of structure and function with associated phase shifts. Algae of the genus Caulerpa J.V. Lamouroux, 1809 are known as widespread and persistent marine invaders. They grow rapidly, particularly in disturbed areas where they can opportunistically monopolize substratum and compete with native species, thus reducing biodiversity. Caulerpa chemnitzia increased in abundance and overgrew corals on the reef since 2012, ultimately raising fears that a phase-shift from ...


Microplastics: Water And Oyster Data For The Indian River Lagoon, Linda Walters, Casey Craig 2022 University of Central Florida

Microplastics: Water And Oyster Data For The Indian River Lagoon, Linda Walters, Casey Craig

CEELAB Research Data

Microplastic (MP) abundances in surface waters and tissues of the oyster Crassostrea virginica were examined for one year in the Indian River Lagoon (IRL), a 251-km long estuary on the east coast of central FL, USA to better understand spatial and temporal variability. A total of 3755 MP were found in 44% of lagoon-wide water samples. Mean density (± CI) was 1.47 ± 0.09 MP/L. Central IRL sites had the lowest MP abundance, while the south had the most, likely associated with proximity to urbanization, inlets (MP sinks) and tributaries (MP sources). More MP were found in water ...


Diving Into The Vertical Dimension Of Elasmobranch Movement Ecology, Samantha Andrzejaczek, Tim C. D. Lucas, Maurice C. Goodman, Nigel E. Hussey, Amelia J. Armstrong, Aaron B. Carlisle, Daniel M. Coffey, Adrian C. Gleiss, Charlie Huveneers, David M. P. Jacoby, Mark G. Meekan, Johann Mourier, Lauren R. Peel, Katya Abrantes, Andre S. Afonso, Matthew J. Ajemian, Brooke N. Anderson, Scot D. Anderson, Gonzalo Araujo, Asia O. Armstrong, Pascal Bach, Adam Barnett, Mike B. Bennett, Natalia P. A. Bezerra, Ramon Bonfil, Andre M. Boustany, Heather D. Bowlby, Ilka Branco, Carmin D. Braun, Edward J. Brooks, Judith Brown, Patrick J. Burke, Paul Butcher, Michael Castleton, Taylor K. Chapple, Olivier Chateau, Maurice Clarke, Rui Coelho, Enric Cortes, Lydie I. E. Couturier, Paul D. Cowley, Donald A. Croll, Juan M. Cuevas, Tobey H. Curtis, Laurent Dagorn, Jonathan J. Dale, Ryan Daly, Heidi Dewar, Philip D. Doherty, Andres Domingo, Alistair D. M. Dove, Michael Drew, Christine L. Dudgeon, Clinton A. J. Duffy, Riley G. Elliott, Jim R. Ellis, Mark V. Erdmann, Thomas J. Farrugia, Luciana C. Ferreira, Francesco Ferretti, John D. Filmalter, Brittany Finucci, Chris Fischer, Richard Fitzpatrick, Fabien Forget, Kerstin Forsberg, Malcolm P. Francis, Bryan R. Franks, Austin J. Gallagher, Felipe Galva-Magana, Mirta L. Garcia, Troy F. Gaston, Bronwyn M. Gillanders, Matthew J. Gollock, Jonathan R. Green, Sofia Green, Christopher A. Griffiths, Neil Hammerschlag, Abdi Hasan, Lucy A. Hawkes, Fabio H.V. Hazin, Matthew Heard, Alex Hearn, Suzanne M. Henderson, John C. Holdsworth, Kim N. Holland, Lucy A. Howey, Robert E. Hueter, Nicolas E. Humphries, Melanie Hutchinson, Fabrice R. A. Jaine, Salvador J. Jorgensen, Paul E. Kanive, Jessica Labaja, Fernanda O. Lana, Hugo Lassauce, Rebecca S. Lipscombe, Fiona Llewellyn, Bruno C. L. Macena, Ronald Mambrasar, Jaime D. McAllister, Sophy R. McCully Phillips, Frazer McGregor, Matthew N. McMillan, Lianne M. McNaughton, Sibele A. Mendonça, Carl G. Meyer, Megan Meyers, John A. Mohan, John C. Montgomery, Gonzalo Mucientes, Michael K. Musyl, Nicole Nasby-Lucas, Lisa Natanson, John B. O'Sullivan, Paulo Oliveira, Yannis P. Papastamatiou, Toby A. Patterson, Simon J. Pierce, Nuno Queiroz, Craig A. Radford, Andy J. Richardson, Anthony J. Richardson, David Righton, Christoph A. Rohner, Mark A. Royer, Ryan A. Saunders, Matthias Schaber, Robert J. Schallert, Michael C. Scholl, Andrew C. Seitz, Jayson M. Semmens, Edy Setyawan, Brendan D. Shea, Rafid A. Shidqi, George Shillinger, Oliver N. Shipley, Mahmood Shivji, Abraham B. Sianipar, Joana F. Silva, David W. Sims, Gregory B. Skomal, Lara L. Sousa, Emily J. Southall, Julia L. Y. Spaet, Killian M. Stehfest, Guy Stevens, Joshua D. Stewart, James Sulikowski, Ismail Syakurachman, Simon R. Thorrold, Michele Thums, David Tickler, Mariana T. Tolloti, Kathy A. Townsend, Paulo Travassos, John P. Tyminski, Jeremy Vaudo, Drausio Veras, Laurent Wantiez, Sam B. Weber, R.J. David Wells, Kevin C. Weng, Bradley M. Wetherbee, Jane E. Williamson, Matthew J. Witt, Serena Wright, Kelly Zilliacus, Barbara A. Block, David J. Curnick 2022 Stanford University

Diving Into The Vertical Dimension Of Elasmobranch Movement Ecology, Samantha Andrzejaczek, Tim C. D. Lucas, Maurice C. Goodman, Nigel E. Hussey, Amelia J. Armstrong, Aaron B. Carlisle, Daniel M. Coffey, Adrian C. Gleiss, Charlie Huveneers, David M. P. Jacoby, Mark G. Meekan, Johann Mourier, Lauren R. Peel, Katya Abrantes, Andre S. Afonso, Matthew J. Ajemian, Brooke N. Anderson, Scot D. Anderson, Gonzalo Araujo, Asia O. Armstrong, Pascal Bach, Adam Barnett, Mike B. Bennett, Natalia P. A. Bezerra, Ramon Bonfil, Andre M. Boustany, Heather D. Bowlby, Ilka Branco, Carmin D. Braun, Edward J. Brooks, Judith Brown, Patrick J. Burke, Paul Butcher, Michael Castleton, Taylor K. Chapple, Olivier Chateau, Maurice Clarke, Rui Coelho, Enric Cortes, Lydie I. E. Couturier, Paul D. Cowley, Donald A. Croll, Juan M. Cuevas, Tobey H. Curtis, Laurent Dagorn, Jonathan J. Dale, Ryan Daly, Heidi Dewar, Philip D. Doherty, Andres Domingo, Alistair D. M. Dove, Michael Drew, Christine L. Dudgeon, Clinton A. J. Duffy, Riley G. Elliott, Jim R. Ellis, Mark V. Erdmann, Thomas J. Farrugia, Luciana C. Ferreira, Francesco Ferretti, John D. Filmalter, Brittany Finucci, Chris Fischer, Richard Fitzpatrick, Fabien Forget, Kerstin Forsberg, Malcolm P. Francis, Bryan R. Franks, Austin J. Gallagher, Felipe Galva-Magana, Mirta L. Garcia, Troy F. Gaston, Bronwyn M. Gillanders, Matthew J. Gollock, Jonathan R. Green, Sofia Green, Christopher A. Griffiths, Neil Hammerschlag, Abdi Hasan, Lucy A. Hawkes, Fabio H.V. Hazin, Matthew Heard, Alex Hearn, Suzanne M. Henderson, John C. Holdsworth, Kim N. Holland, Lucy A. Howey, Robert E. Hueter, Nicolas E. Humphries, Melanie Hutchinson, Fabrice R. A. Jaine, Salvador J. Jorgensen, Paul E. Kanive, Jessica Labaja, Fernanda O. Lana, Hugo Lassauce, Rebecca S. Lipscombe, Fiona Llewellyn, Bruno C. L. Macena, Ronald Mambrasar, Jaime D. Mcallister, Sophy R. Mccully Phillips, Frazer Mcgregor, Matthew N. Mcmillan, Lianne M. Mcnaughton, Sibele A. Mendonça, Carl G. Meyer, Megan Meyers, John A. Mohan, John C. Montgomery, Gonzalo Mucientes, Michael K. Musyl, Nicole Nasby-Lucas, Lisa Natanson, John B. O'Sullivan, Paulo Oliveira, Yannis P. Papastamatiou, Toby A. Patterson, Simon J. Pierce, Nuno Queiroz, Craig A. Radford, Andy J. Richardson, Anthony J. Richardson, David Righton, Christoph A. Rohner, Mark A. Royer, Ryan A. Saunders, Matthias Schaber, Robert J. Schallert, Michael C. Scholl, Andrew C. Seitz, Jayson M. Semmens, Edy Setyawan, Brendan D. Shea, Rafid A. Shidqi, George Shillinger, Oliver N. Shipley, Mahmood Shivji, Abraham B. Sianipar, Joana F. Silva, David W. Sims, Gregory B. Skomal, Lara L. Sousa, Emily J. Southall, Julia L. Y. Spaet, Killian M. Stehfest, Guy Stevens, Joshua D. Stewart, James Sulikowski, Ismail Syakurachman, Simon R. Thorrold, Michele Thums, David Tickler, Mariana T. Tolloti, Kathy A. Townsend, Paulo Travassos, John P. Tyminski, Jeremy Vaudo, Drausio Veras, Laurent Wantiez, Sam B. Weber, R.J. David Wells, Kevin C. Weng, Bradley M. Wetherbee, Jane E. Williamson, Matthew J. Witt, Serena Wright, Kelly Zilliacus, Barbara A. Block, David J. Curnick

Marine & Environmental Sciences Faculty Articles

Knowledge of the three-dimensional movement patterns of elasmobranchs is vital to understand their ecological roles and exposure to anthropogenic pressures. To date, comparative studies among species at global scales have mostly focused on horizontal movements. Our study addresses the knowledge gap of vertical movements by compiling the first global synthesis of vertical habitat use by elasmobranchs from data obtained by deployment of 989 biotelemetry tags on 38 elasmobranch species. Elasmobranchs displayed high intra- and interspecific variability in vertical movement patterns. Substantial vertical overlap was observed for many epipelagic elasmobranchs, indicating an increased likelihood to display spatial overlap, biologically interact, and ...


Ichthyofaunal Utilization Of A Man-Made Salt Marsh Creek In Mission Bay, California, 25 Years After Creation, Maria Angst, Drew M. Talley 2022 University of San Diego

Ichthyofaunal Utilization Of A Man-Made Salt Marsh Creek In Mission Bay, California, 25 Years After Creation, Maria Angst, Drew M. Talley

Research Week

Abstract: Southern California's wetlands are drastically declining due to human activities. Increasingly, marsh restoration and creation are being used to mitigate such losses. This study used minnow traps to resample the ichthyofauna of a created marsh (Crown Point Mitigation Site; CPMS) and an adjacent natural marsh (Kendall Frost) in Mission Bay, California, 26 years following the marsh creation. These data were compared to data collected from 1995-1998, immediately after marsh creation. Fishes trapped included Fundulus parvipinnis, Gillichthys mirabilis, Ctenogobius sagittula, Atherinops affinis, and Mugil cephalus. Species richness and dominance measures were higher in the natural relative to the created ...


Purification Of Artepillin C (Arc) With Anticancer Activities From Supercritical Co2-Ethanol Extracts Of Brazilian Green Propolis By Using Adsorption Column Chromatography, Lin-Hsiang Chuang, Wen-Chin Chen, Wen Pei, Ming-Hsi Chuang, Todd Hsu, Po-Chao Chuang 2022 Ph.D. Program of Technology Management, Chung Hua University, Hsinchu 30012, Taiwan

Purification Of Artepillin C (Arc) With Anticancer Activities From Supercritical Co2-Ethanol Extracts Of Brazilian Green Propolis By Using Adsorption Column Chromatography, Lin-Hsiang Chuang, Wen-Chin Chen, Wen Pei, Ming-Hsi Chuang, Todd Hsu, Po-Chao Chuang

Journal of Marine Science and Technology

Phenolic compounds with varying phenolic structures are present in both terrestrial and marine organisms. Artepillin C (ARC) is a prenylated phenolic compound produced specifically in Brazilian green propolis. Earlier studies have demonstrated the potential of ARC as a dietary supplement for cancer prevention due to its ability to suppress tumor growth and metastasis. Here we report the development of an effective adsorption chromatography combined with supercritical CO2 extraction for the massive purification of ARC. A mixture of supercritical CO2 and ethanol extract of Brazilian green propolis was passed through a stainless chromatographic column packed with protruding metals at 4,000 ...


A Stochastic Sailing Speed Optimization And Vessel Deployment Problem In Liner Shipping, Dung-Ying Lin, Pak Weng Leong 2022 Department of Industrial Engineering and Engineering Management National Tsing Hua University

A Stochastic Sailing Speed Optimization And Vessel Deployment Problem In Liner Shipping, Dung-Ying Lin, Pak Weng Leong

Journal of Marine Science and Technology

In this research, we consider the stochastic sailing speed optimization and vessel deployment problem and examine the trade-off between sailing speed and the number of vessels required to provide a certain service in international liner shipping. Solving this kind of stochastic program is a challenging task. To address this issue, we construct a mathematical formulation based on Ng (1) and Ng (2) and enhance the linearization techniques from Wang and Meng (3) so that problem instances of an even larger scale can be solved. The proposed formulation has been numerically applied to solve realistic cases, and the empirical results show ...


Vehicle Assignment For Chemicals Transportation, Yu-Liang Liu, Juan Huang, Ching-Wu Chu 2022 TCM Technical Service Inc., 6 F., No. 222, Sec. 2, Nankan Rd., Luzhu Dist., Taoyuan City 33855, Taiwan, R.O.C

Vehicle Assignment For Chemicals Transportation, Yu-Liang Liu, Juan Huang, Ching-Wu Chu

Journal of Marine Science and Technology

Vehicle assignment is a significant challenge faced by chemical logistics companies. The chemical industry typically outsources the delivery of chemicals to professional logistics companies to meet customers' complex and demanding needs. In this regard, this research explores the case study of a logistics company that selects its delivery modes and formulates its vehicle assignment plans based on its personnel’s experience rather than any formal system and plans its vehicle routes on the day before the delivery. This study seeks to improve the efficiency and immediacy of logistics companies’ vehicle assignments, understand vehicle route planning, maximize space utilization, and minimize ...


A Hybrid Finite Difference Method For Singularly Perturbed Delay Partial Differential Equations With Discontinuous Coefficient And Source, Nitika Sharma, Aditya Kaushik 2022 Department of Applied Mathematics, Delhi Technological University, Delhi -110042 India

A Hybrid Finite Difference Method For Singularly Perturbed Delay Partial Differential Equations With Discontinuous Coefficient And Source, Nitika Sharma, Aditya Kaushik

Journal of Marine Science and Technology

The article presents a hybrid finite difference scheme to solve a singularly perturbed parabolic functional differential equation with discontinuous coefficient and source. The simultaneous presence of deviating argument with a discontinuous source and coefficient makes the problem stiff. The solution of the problem exhibits turning point behaviour across discontinuity as tends to zero. The hybrid scheme presented is a composition of a central difference scheme and a midpoint upwind scheme on a specially generated mesh. At the same time, an implicit finite difference method is used to discretize the time variable. Consistency, stability, and convergence of the presented numerical approach ...


Simulating And Predicting Offshore Oil Spills By Using Cellular Automata, Lin Liu, Wanwu Li, Yumeng Cui, Guanghui Hu, Hang Li 2022 Shandong University of Science and Technology, Qingdao, China.

Simulating And Predicting Offshore Oil Spills By Using Cellular Automata, Lin Liu, Wanwu Li, Yumeng Cui, Guanghui Hu, Hang Li

Journal of Marine Science and Technology

In recent years, offshore oil spill accidents have caused substantial damage to both marine organisms and marine ecology. Accurate simulation and prediction of oil spills could provide a scientific basis for assessing losses due to oil spills and provide support for emergency decisions regarding oil spills. We analyzed the advantages and disadvantages of existing oil spill models and constructed an offshore oil spill model based on cellular automata (CA). By considering both the flow field and wind field, we formulated new CA rules for the diffusion and drift of a pollution zone, and in our model, the cellular state in ...


Design And Testing Of A Bearing Less Piezo Jet Micro Heat Sink, Rong-Tsu Wang, Jung-Chang Wang, Sih-Li Chen 2022 Department of Marine Engineering, National Taiwan Ocean University, Keelung, Taiwan, R.O.C.

Design And Testing Of A Bearing Less Piezo Jet Micro Heat Sink, Rong-Tsu Wang, Jung-Chang Wang, Sih-Li Chen

Journal of Marine Science and Technology

The present study utilized piezoelectric ceramics (PC) as actuators to design five new piezoelectric heatsinks and preliminarily investigated the different design types and their operating conditions, such as the frequency, placement distance, thickness between piezoelectric sheets, piezoelectric sheet size, and noise produced. The results showed that when the micro heatsink bearingless piezo jet was placed too close to the heat source, the high temperature sucked back the surrounding fluids, causing the fluid chamber temperature to rise and the cooling effect to be reduced. Therefore, the heatsink should be placed between 10 and 20 mm from the heat source. With the ...


Size Structuring Of Myctophids In The Northern Gulf Of Mexico In The Years Following The Deepwater Horizon Oil Spill, Adam Warren 2022 Nova Southeastern University

Size Structuring Of Myctophids In The Northern Gulf Of Mexico In The Years Following The Deepwater Horizon Oil Spill, Adam Warren

All HCAS Student Capstones, Theses, and Dissertations

Body size is one of the main determinants of marine ecosystem structure and is correlated with many behavioral processes such as diel vertical migration (DVM). Myctophidae, a highly abundant, speciose, and globally distributed fish family, perform diel vertical migrations between the epipelagic zone at night and the mesopelagic zone during the day with vertical distributions varying with ontogeny, and therefore body length. Understanding how DVM contributes to an ecosystem’s structure is important to understanding ecosystem functioning, especially in response to anthropogenic impacts such as the Deepwater Horizon oil spill. The aim of this study was to investigate changes in ...


Effects Of Net Type On The Quantification Of Pelagic Shrimp And Krill In The Gulf Of Mexico, Eric J. Lee 2022 Nova Southeastern University

Effects Of Net Type On The Quantification Of Pelagic Shrimp And Krill In The Gulf Of Mexico, Eric J. Lee

All HCAS Student Capstones, Theses, and Dissertations

Trawls are an effective and widely used method for collecting micronekton because they can sample large volumes of sparsely distributed organisms, as well as allow for direct species identification of collected samples. However, net sampling methods are known to be highly variable in terms of design and catchability, and comparisons of deep-sea trawl data from two different types of nets over the same spatial and temporal scale are relatively rare. The current study is unique because it provides such an analysis for micronektonic crustaceans in the Gulf of Mexico (GOM) by comparing the trawling efficacy of a smaller 10 m ...


Sympatric Otariids Increase Trophic Segregation In Response To Warming Ocean Conditions In Peruvian Humboldt Current System, Susana Cardenas-Alayza, Michael Adkesson, Mickie Rae Edwards, Amy C. Hirons, Dimitri Gutierrez, Yann Tremblay 2022 University Peruana Cayetano Heredia - Lima, Peru; University Montpellier - France

Sympatric Otariids Increase Trophic Segregation In Response To Warming Ocean Conditions In Peruvian Humboldt Current System, Susana Cardenas-Alayza, Michael Adkesson, Mickie Rae Edwards, Amy C. Hirons, Dimitri Gutierrez, Yann Tremblay

Marine & Environmental Sciences Faculty Articles

Determining trophic habits of predator communities is essential to measure interspecific interactions and response to environmental fluctuations. South American fur seals, Arctocephalus australis (SAFS) and sea lions Otaria byronia (SASL), coexist along the coasts of Peru. Recently, ocean warming events (2014–2017) that can decrease and impoverish prey biomass have occurred in the Peruvian Humboldt Current System. In this context, our aim was to assess the effect of warming events on long-term inter- and intra-specific niche segregation. We collected whisker from SAFS (55 females and 21 males) and SASL (14 females and 22 males) in Punta San Juan, Peru. We ...


Benthic Community Dynamics And Stony Coral Demographics In Florida In Relation To Acute Disturbances And Chronic Pressures, Nicholas P. Jones 2022 Nova Southeastern University

Benthic Community Dynamics And Stony Coral Demographics In Florida In Relation To Acute Disturbances And Chronic Pressures, Nicholas P. Jones

All HCAS Student Capstones, Theses, and Dissertations

The persistence of coral reef communities is threatened by a suite of pressures operating at varying spatial and temporal scales. In general, acute disturbances (short term stochastic events such as marine heatwaves or hurricanes) and chronic pressures, such as ocean warming, have caused the most significant changes to stony coral assemblages (order Scleractinia) and continue to impair recovery potential. Additionally, many coral reefs are subject to local chronic anthropogenic pressures resulting in poor water quality or sedimentation, which further impact stony corals and shape benthic community structure, particularly near urbanized coastlines. For the viability of communities on coral reefs, a ...


The Impacts Of Egg Chamber Depth And Clutch Size On Hatching And Emergence Success For Loggerhead Sea Turtles (Caretta Caretta) On South Florida Beaches, Curtis J. Slagle 2022 Nova Southeastern University

The Impacts Of Egg Chamber Depth And Clutch Size On Hatching And Emergence Success For Loggerhead Sea Turtles (Caretta Caretta) On South Florida Beaches, Curtis J. Slagle

All HCAS Student Capstones, Theses, and Dissertations

All seven extant species of sea turtle are either threatened or endangered due to a multitude of anthropogenic and environmental factors. There has been strong emphasis on reversing this trend through various conservation efforts at multiple life stages, yet, if hatchlings never develop within the nest or are unable to escape the egg chamber, then these efforts are futile. Understanding how they develop, the factors impacting this development and their ability to emerge from the egg chamber are essential for sea turtle conservation. Important factors that may impact hatching success (HS) and emergence success (ES) are egg chamber depth (ECD ...


Impacts On Fast-Start Performance: How Do Group Size And Habitat Degradation Alter The Escape Behavior Of A Schooling Coral Reef Fish?, Monica D. Bacchus 2022 Nova Southeastern University

Impacts On Fast-Start Performance: How Do Group Size And Habitat Degradation Alter The Escape Behavior Of A Schooling Coral Reef Fish?, Monica D. Bacchus

All HCAS Student Capstones, Theses, and Dissertations

Escaping predation is essential for species survival, but prey must effectively match their response to the perceived threat imposed by a predator. Fish evaluate their surroundings using several sensory stimuli, including olfactory, visual, auditory, and mechanical cues. A range of taxa use the fast-start response to evade predators, including fishes, sharks, and larval amphibians. While the fast-start response (rapid bursts of swimming) is extensively studied in solitary fishes, the factors that mediate the collective escape response in schools of fish have historically been investigated far less. To address this knowledge gap, the collective escape behavior and individual escape performance of ...


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