A5009861685- Marine Sponges and Natural Products
- Marine and fisheries research
- Fish Ecology and Management Studies
- Marine Biology and Ecology Research
- Marine Biology and Environmental Chemistry
- Marine Invertebrate Physiology and Ecology
- Recycling and Waste Management Techniques
- Microplastics and Plastic Pollution
- Marine and coastal ecosystems
- Coral and Marine Ecosystems Studies
- Underwater Vehicles and Communication Systems
- Synthetic Organic Chemistry Methods
- Species Distribution and Climate Change
- Avian ecology and behavior
- Marine Bivalve and Aquaculture Studies
- Marine animal studies overview
- Echinoderm biology and ecology
- Oceanographic and Atmospheric Processes
- Environmental DNA in Biodiversity Studies
- Marine Ecology and Invasive Species
- Digital Holography and Microscopy
- Animal Behavior and Reproduction
- Underwater Acoustics Research
- Marine Toxins and Detection Methods
- Isotope Analysis in Ecology
Marine Scotland
2016-2024
University of Cambridge
2015-2021
Marine Conservation Institute
2021
University of Alberta
2006-2014
Oregon State University
2006-2012
University of Victoria
2005-2007
Glass sponges are conspicuous inhabitants of benthic communities in the cool waters Antarctic and north Pacific continental shelf. We used an ROV outfitted with a new device for simultaneous sampling water inhaled exhaled by to provide first data on nutritional ecology metabolism two glass sponge species their natural deep‐water habitat (120–160 m). Aphrocallistes vastus Rhabdocalyptus dawsoni were found be mostly bacteriovores, removing up 95% bacteria (median removal was 79% both species)...
Sponges are considered to be filter feeders like their nearest protistan relatives, the choanoflagellates. Specialized "sieve" cells (choanocytes) have an apical collar of tightly spaced, rodlike microvilli that surround a long flagellum. The beat flagellum is believed draw water through this collar, but how particles caught on brought cell surface unknown. We studied interactions occur between choanocytes and introduced in large feeding chambers syconoid calcareous sponge. Of all particles,...
Haeckel's studies of development in calcareous sponges (1872) led him to develop the "Gastraea Theory," which proposes that ancestral mode germ layer formation, or gastrulation, was by invagination produce a functional gut. His observations gastrulation Calcarea occurs ciliated larva upon settlement and metamorphosis were supported remarkable photomicrographs stage Hammer 1908. Although no later work found same stage, these concepts are repeated texts today. We have re-examined embryogenesis...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 615:79-100 (2019) - DOI: https://doi.org/10.3354/meps12939 Effect of suspended sediments on pumping rates three species glass sponge in situ N. Grant1, E. Matveev1,5, A. S. Kahn1,6, K. Archer2, Dunham2, R. J. Bannister3, D. Eerkes-Medrano4, P. Leys1,* 1Department Biological Sciences, University Alberta,...
Abstract. Recent molecular data suggest that the Porifera is paraphyletic (Calcarea+Silicea) and Calcarea more closely related to Metazoa than other sponge groups, thereby implying a sponge‐like animal gave rise metazoans. One ramification of these calcareous sponges could provide clues as what features are shared among this ancestral metazoan higher animals. studies describing detailed morphology in lacking. We have used combination microscopy techniques study fine structure Sycon coactum U...
Abstract Studies of regeneration provide insight across many scales animal biology from the processes cellular communication to ecology whole populations. Sponges are highly regenerative animals, with studies showing adults can both recover large portions their body after predation or damage due storms, and even reform individuals, via an aggregation stage, dissociated tissues. While sponges clearly regenerative, few actually show cells forming functional individuals. As often serve as model...
Understanding the responses of seabirds to climate-induced variations in phenology and abundance their prey is key developing ecosystem-based fisheries management measures that benefit higher trophic levels. The match/mismatch hypothesis (MMH) emphasizes need consider synchrony seasonal cycles predators prey, while match/mismatch/abundance (MMAH) proposes may reinforce/compensate mismatch effects. This study considers effects both availability lesser sandeel Ammodytes marinus on hatching,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 478:139-151 (2013) - DOI: https://doi.org/10.3354/meps10130 Contrasting effects of hypoxic conditions on survivorship planktonic larvae rocky intertidal invertebrates Dafne Eerkes-Medrano1,*, Bruce A. Menge1, Christine Sislak3, Christopher J. Langdon2 1Department Zoology, 3029 Cordley Hall, Oregon State...
Abstract Major changes in North Atlantic zooplankton communities recent decades have been linked to climate change but the roles of environmental drivers are often complex. High temporal resolution data is required disentangle natural seasonal from additional sources variability highly heterogeneous marine systems. Here, physical and plankton abundance spanning 2003–2017 a weekly long-term monitoring site on west coast Scotland were used investigate cause an increasing decline approximately...
Abstract Isotopic analyses of the incrementally growing baleen in Mysticeti have been used to learn about their feeding and movement patterns. Using methods previously applied Pacific minke whales, stable δ 15 N 13 C isotope values were measured along plates male female whales from two locations Northeast Atlantic. The sample sizes this study are comparable those literature, and, although limited size, evidence suggests differences isotopic signatures between caught at different locations....
A submersible pulsed digital holographic camera (named weeHoloCam) has been developed for monitoring microparticles in the ocean, mainly microorganisms. It is most compact and lightweight of its kind. We have built two versions, both same dimensions: 9 cm diameter x 60 long. The first version with aluminium housing (500 m depth rating) weighs 3.5 kg while second titanium (2000 4.7 kg. They can be connected to a 50 subsea cable real-time analysis onboard vessel or battery unit autonomous...
How flow moves through porous structures like sponges has long intrigued physical and biological scientists. Despite having specialized cells that function as pumps, their bodies are proposed to passively take advantage of ambient currents via ‘inducedflow’. This hypothesis relies on the fact external perforated or tube-like drives structure, but much support for this comes from work dead specimens. A modern understanding sponge morphology physiology however, shows possess a sophisticated...