All posts; Tags Include "Marine Ecology"
- October 25, 2016
- 07:35 PM
- 211 views
Why do polar bears mock battle? and other facts about polar bear reproduction
by Emily Makowski in Sextraordinary!
Inspired by an Instagram photo of polar bears playfighting, I decided to find out more about this strange behavior and learned many interesting things about polar bear reproduction.... Read more »
Fitzgerald KT. (2013) Polar bears: the fate of an icon. Topics in Companion Animal Medicine, 28(4), 135-42. PMID: 24331553
- September 18, 2016
- 07:03 AM
- 340 views
5 Things We Learned This Week | Open-Access Science | Week 37, 2016
by TakFurTheKaffe in Tak Fur The Kaffe
New theories in ocean circulation and acidification, shorter sea ice season in polar bear habitats, and new tools to track bird migrations and hair protein analysis in forensic IDs. Here are five of the latest scientific studies published open-access this week.... Read more »
Klockmann, M., Mikolajewicz, U., & Marotzke, J. (2016) The effect of greenhouse gas concentrations and ice sheets on the glacial AMOC in a coupled climate model. Climate of the Past, 12(9), 1829-1846. DOI: 10.5194/cp-12-1829-2016
Sutton, A., Sabine, C., Feely, R., Cai, W., Cronin, M., McPhaden, M., Morell, J., Newton, J., Noh, J., Ólafsdóttir, S.... (2016) Using present-day observations to detect when anthropogenic change forces surface ocean carbonate chemistry outside preindustrial bounds. Biogeosciences, 13(17), 5065-5083. DOI: 10.5194/bg-13-5065-2016
Stern, H., & Laidre, K. (2016) Sea-ice indicators of polar bear habitat. The Cryosphere, 10(5), 2027-2041. DOI: 10.5194/tc-10-2027-2016
Shamoun-Baranes, J., Farnsworth, A., Aelterman, B., Alves, J., Azijn, K., Bernstein, G., Branco, S., Desmet, P., Dokter, A., Horton, K.... (2016) Innovative Visualizations Shed Light on Avian Nocturnal Migration. PLOS ONE, 11(8). DOI: 10.1371/journal.pone.0160106
Parker, G., Leppert, T., Anex, D., Hilmer, J., Matsunami, N., Baird, L., Stevens, J., Parsawar, K., Durbin-Johnson, B., Rocke, D.... (2016) Demonstration of Protein-Based Human Identification Using the Hair Shaft Proteome. PLOS ONE, 11(9). DOI: 10.1371/journal.pone.0160653
- September 7, 2016
- 06:17 PM
- 360 views
Girls only, literally: global warming and sea turtle sex ratios
by Emily Makowski in Sextraordinary!
The sex of sea turtle offspring is largely dependent on temperature, and global warming could lead to problems where populations are mostly/all female. However, sea turtles have a trick up their sleeve (in their shells?) that may make them more resilient to the effects of global warming than previously thought.... Read more »
Standora, E., & Spotila, J. (1985) Temperature Dependent Sex Determination in Sea Turtles. Copeia, 1985(3), 711. DOI: 10.2307/1444765
Hays, G., Mazaris, A., & Schofield, G. (2014) Different male vs. female breeding periodicity helps mitigate offspring sex ratio skews in sea turtles. Frontiers in Marine Science. DOI: 10.3389/fmars.2014.00043
- June 1, 2016
- 09:38 AM
- 539 views
All hail our eight-limbed overlords
by gdw in FictionalFieldwork
(This is my first attempt to blend science and fiction in a single post. The idea is to write about a recent study or studies but explore it through small snippets of original fiction as well. Hope you like it. Feedback is always greatly appreciated…) # A carefully orchestrated dance of chromatophores flashed Octa’s agreement. […]... Read more »
Doubleday ZA, Prowse TA, Arkhipkin A, Pierce GJ, Semmens J, Steer M, Leporati SC, Lourenço S, Quetglas A, Sauer W.... (2016) Global proliferation of cephalopods. Current biology : CB, 26(10). PMID: 27218844
- May 2, 2016
- 03:50 AM
- 431 views
A statistical regression approach to estimate zooplankton mortality
by sceintists from the Marine group at CEES in Marine Science blog
It is notoriously difficult to estimate mortality rates for zooplankton populations in the open ocean. In a new paper, Kvile and colleagues demonstrate that mortality estimation can be improved using a statistical regression approach (SRA) that takes into account advection and spatiotemporal trends in recruitment. Using this method on
Calanus finmarchicus survey data from the Norwegian Sea–Barents Sea, they find indications of increased mortality for the old........ Read more »
AKSNES, D., & OHMAN, M. (1996) A vertical life table approach to zooplankton mortality estimation. Limnology and Oceanography, 41(7), 1461-1469. DOI: 10.4319/lo.1996.41.7.1461
Kvile, K., Stige, L., Prokopchuk, I., & Langangen, �. (2016) A statistical regression approach to estimate zooplankton mortality from spatiotemporal survey data. Journal of Plankton Research. DOI: 10.1093/plankt/fbw028
- April 17, 2016
- 03:00 AM
- 816 views
Week 15 In Review: Open-Access Science | 11 to 17 April
by TakFurTheKaffe in Tak Fur The Kaffe
Swarming Red Crabs, 11,000-year-old shaman headdress, 'superfast' wing muscles, slowdown of giant airstreams, and sexually transmitted infections in Neanderthals. Here are five of the latest scientific studies published open-access this week, ... Read more »
Pineda, J., Cho, W., Starczak, V., Govindarajan, A., Guzman, H., Girdhar, Y., Holleman, R., Churchill, J., Singh, H., & Ralston, D. (2016) A crab swarm at an ecological hotspot: patchiness and population density from AUV observations at a coastal, tropical seamount. PeerJ. DOI: 10.7717/peerj.1770
Little, A., Elliott, B., Conneller, C., Pomstra, D., Evans, A., Fitton, L., Holland, A., Davis, R., Kershaw, R., O’Connor, S.... (2016) Technological Analysis of the World’s Earliest Shamanic Costume: A Multi-Scalar, Experimental Study of a Red Deer Headdress from the Early Holocene Site of Star Carr, North Yorkshire, UK. PLOS ONE, 11(4). DOI: 10.1371/journal.pone.0152136
Fuxjager, M., Goller, F., Dirkse, A., Sanin, G., & Garcia, S. (2016) Select forelimb muscles have evolved superfast contractile speed to support acrobatic social displays. eLife. DOI: 10.7554/eLife.13544
Stadtherr, L., Coumou, D., Petoukhov, V., Petri, S., & Rahmstorf, S. (2016) Record Balkan floods of 2014 linked to planetary wave resonance. Science Advances, 2(4). DOI: 10.1126/sciadv.1501428
Houldcroft, C., & Underdown, S. (2016) Neanderthal genomics suggests a pleistocene time frame for the first epidemiologic transition. American Journal of Physical Anthropology. DOI: 10.1002/ajpa.22985
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- March 6, 2016
- 01:07 PM
- 305 views
The hand of Code: Developmental transcriptomics in haddock
by sceintists from the Marine group at CEES in Marine Science blog
The development of haddock embryos is highly impacted by oil exposure as discussed in a previous
post. In a new study Sørhus et al. explored the link between transcriptional changes and developmental processes such as pattern formation and organogenesis. The question is to understand the abnormal development in fish.
... Read more »
Sørhus, E., Incardona, J., Furmanek, T., Jentoft, S., Meier, S., & Edvardsen, R. (2016) Developmental transcriptomics in Atlantic haddock: Illuminating pattern formation and organogenesis in non-model vertebrates. Developmental Biology, 411(2), 301-313. DOI: 10.1016/j.ydbio.2016.02.012
Sørhus, E., Edvardsen, R., Karlsen, Ø., Nordtug, T., van der Meeren, T., Thorsen, A., Harman, C., Jentoft, S., & Meier, S. (2015) Unexpected Interaction with Dispersed Crude Oil Droplets Drives Severe Toxicity in Atlantic Haddock Embryos. PLOS ONE, 10(4). DOI: 10.1371/journal.pone.0124376
Misund, O., & Olsen, E. (2013) Lofoten-Vesteralen: for cod and cod fisheries, but not for oil?. ICES Journal of Marine Science, 70(4), 722-725. DOI: 10.1093/icesjms/fst086
- February 25, 2016
- 03:05 PM
- 658 views
Grow, coral, grow!
by dominicwhite in Two Degrees or Under
I was just reading this fascinating article published online yesterday in Nature, called “Reversal of ocean acidification enhances net coral reef calcification“. The study is investigating what effect ocean acidification is having on reefs, a tricky problem as other confounding...... Read more »
Albright, R., Caldeira, L., Hosfelt, J., Kwiatkowski, L., Maclaren, J., Mason, B., Nebuchina, Y., Ninokawa, A., Pongratz, J., Ricke, K.... (2016) Reversal of ocean acidification enhances net coral reef calcification. Nature. DOI: 10.1038/nature17155
- February 5, 2016
- 05:21 AM
- 541 views
Disentangling the mechanisms behind climate effects on a key zooplankton species
by sceintists from the Marine group at CEES in Marine Science blog
A recently paper published in
PNAS, members of the CEES Marine Group explores potential climate effects on
Calanus finmarchicus, a key zooplankton species in the North Atlantic. The paper shows how the combination of shallow mixed-layer-depth and increased wind apparently increases chlorophyll biomass in spring, and in turn
C. finmarchicus biomass in summer. These findings strongly suggest bottom-up effects of food availability on zoopla........ Read more »
Kvile, K., Langangen, Ø., Prokopchuk, I., Stenseth, N., & Stige, L. (2016) Disentangling the mechanisms behind climate effects on zooplankton. Proceedings of the National Academy of Sciences, 201525130. DOI: 10.1073/pnas.1525130113
- January 29, 2016
- 12:25 AM
- 657 views
European killer whales face extinction due to banned pollutants
by TakFurTheKaffe in Tak Fur The Kaffe
Levels of the toxic compound PCBs in the marine environment are now so high that they threaten the very existence of some of Europe’s top sea predators, suggests new research. ... Read more »
Jepson, P., Deaville, R., Barber, J., Aguilar, �., Borrell, A., Murphy, S., Barry, J., Brownlow, A., Barnett, J., Berrow, S.... (2016) PCB pollution continues to impact populations of orcas and other dolphins in European waters. Scientific Reports, 18573. DOI: 10.1038/srep18573
- January 23, 2016
- 12:25 AM
- 720 views
Top four threats to the ocean, according to marine scientists
by TakFurTheKaffe in Tak Fur The Kaffe
Overfishing, global warming, waste and contamination, and ocean acidification are at the forefront of scientists concerns.... Read more »
Boonstra, W., Ottosen, K., Ferreira, A., Richter, A., Rogers, L., Pedersen, M., Kokkalis, A., Bardarson, H., Bonanomi, S., Butler, W.... (2015) What are the major global threats and impacts in marine environments? Investigating the contours of a shared perception among marine scientists from the bottom-up. Marine Policy, 197-201. DOI: 10.1016/j.marpol.2015.06.007
- January 21, 2016
- 08:35 AM
- 447 views
Climate change and ocean productivity
by sceintists from the Marine group at CEES in Marine Science blog
Marine phytoplankton contribute nearly 50% to global primary production, support zooplankton production and play a vital role in regulating Carbon sequestration. Phytoplankton productivity fluctuations are caused by various direct and indirect effects of temperature, the balance of which show large-scale geographical patterns.
... Read more »
Feng, J., Durant, J., Stige, L., Hessen, D., Hjermann, D., Zhu, L., Llope, M., & Stenseth, N. (2015) Contrasting correlation patterns between environmental factors and chlorophyll levels in the global ocean. Global Biogeochemical Cycles, 29(12), 2095-2107. DOI: 10.1002/2015GB005216
- January 12, 2016
- 12:25 AM
- 616 views
Sharks smell their way to shore
by TakFurTheKaffe in Tak Fur The Kaffe
New research suggests that Leopard sharks navigate with their nose, using chemical changes in the water to ‘smell’ their way home.... Read more »
Nosal, A., Chao, Y., Farrara, J., Chai, F., & Hastings, P. (2016) Olfaction Contributes to Pelagic Navigation in a Coastal Shark. PLOS ONE, 11(1). DOI: 10.1371/journal.pone.0143758
- December 16, 2015
- 10:13 AM
- 445 views
Under the surface
by sceintists from the Marine group at CEES in Marine Science blog
Friday 11 December 2015, Kristina Øie Kvile has defended her PhD about the climate effects on
Calanus finmarchicus dynamics with success.
... Read more »
Kvile, K., Dalpadado, P., Orlova, E., Stenseth, N., & Stige, L. (2014) Temperature effects on Calanus finmarchicus vary in space, time and between developmental stages. Marine Ecology Progress Series, 85-104. DOI: 10.3354/meps11024
- December 3, 2015
- 08:06 AM
- 494 views
Penguins in a frying pan
by sceintists from the Marine group at CEES in Marine Science blog
Penguins are highly visible species for the public. Their life has been portrayed in many movies. Unfortunately they are also species impacted by climate change. In a recent publication a team led by Charles Bost used long-term data to relate the large-scale climatic anomalies in the Southern Hemisphere to the foraging behaviour and population dynamics of the king penguin.
... Read more »
Bost, C., Cotté, C., Terray, P., Barbraud, C., Bon, C., Delord, K., Gimenez, O., Handrich, Y., Naito, Y., Guinet, C.... (2015) Large-scale climatic anomalies affect marine predator foraging behaviour and demography. Nature Communications, 8220. DOI: 10.1038/ncomms9220
Le Bohec, C., Durant, J., Gauthier-Clerc, M., Stenseth, N., Park, Y., Pradel, R., Gremillet, D., Gendner, J., & Le Maho, Y. (2008) King penguin population threatened by Southern Ocean warming. Proceedings of the National Academy of Sciences, 105(7), 2493-2497. DOI: 10.1073/pnas.0712031105
- November 11, 2015
- 08:05 AM
- 1,178 views
Fish Guts and Cancer
by Mark Lasbury in As Many Exceptions As Rules
E. fishelsoni s a bacterium that breaks the rules. It grows from 10 µm long to a fully visible 0.7 mm….in twelve hours! Normally, diffusion isn’t adequate for a bacterium this big because it takes too long for two interacting proteins to find one another. But what if the bacterium make more of the protein, so much more that it can find a partner all the time. How can you make that much of each protein? E. fishelsoni does it by making 85,000 copies of its genome….. ever........ Read more »
Bresler V, Montgomery WL, Fishelson L, Pollak PE. (1998) Gigantism in a bacterium, Epulopiscium fishelsoni, correlates with complex patterns in arrangement, quantity, and segregation of DNA. J Bacteriol., 180(21), 5061-5611. info:/9791108
- November 5, 2015
- 07:47 PM
- 885 views
Baby Giant Squids
by Dr. M in Deep Sea News
We know almost nothing about Giant Squids with mantles lengths less than 1000 mm (~40 inches). Very young squids are even more enigmatic than adults. A recent study reports the collection of three very young Giant Squids off the Japanese coast. The three young measured 140.8, 332, and 332 mm (5.5 and 13 inches). The heaviest of […]... Read more »
Wada, T., Kubodera, T., Yamada, M., & Terakado, H. (2015) First records of small-sized young giant squid Architeuthis dux from the coasts of Kyushu Island and the south-western Sea of Japan. Marine Biodiversity Records. DOI: 10.1017/S175526721500127X
- November 4, 2015
- 08:10 AM
- 1,074 views
Breaking the Size Barrier – Giant Bacteria, part 1
by Mark Lasbury in As Many Exceptions As Rules
The rules of biology say that a bacterium must be small because it doesn’t have dedicated systems for moving molecules around inside the cell and diffusion can only move them so far, so fast. Well, here’s a bacterium that breaks the rule – it’s as big as 3 million other bacteria lumped together! To live this way, this bacterium stores sulfur and nitrogen in amounts that would be enough to kill your cells – everybody has their own rules.... Read more »
Schulz, H., & Jørgensen, B. (2001) Big Bacteria. Annual Review of Microbiology, 55(1), 105-137. DOI: 10.1146/annurev.micro.55.1.105
Girnth, A., Grünke, S., Lichtschlag, A., Felden, J., Knittel, K., Wenzhöfer, F., de Beer, D., & Boetius, A. (2011) A novel, mat-forming Thiomargarita population associated with a sulfidic fluid flow from a deep-sea mud volcano. Environmental Microbiology, 13(2), 495-505. DOI: 10.1111/j.1462-2920.2010.02353.x
- November 3, 2015
- 04:20 PM
- 1,134 views
I Pity the Species That Doesn’t Decorate
by Dr. M in Deep Sea News
Mr. T made mohawks and fool pitying a life goal for many. Another life goal for many, thanks to first name Mr, middle name period, last name T, was decorating themselves with enough gold chains to crash a third-world economy. Although humans are the only species where decoration functions strongly in social interactions (see Beyonce), […]... Read more »
Ruxton, G., & Stevens, M. (2015) The evolutionary ecology of decorating behaviour. Biology Letters, 11(6), 20150325. DOI: 10.1098/rsbl.2015.0325
- October 28, 2015
- 01:25 AM
- 1,000 views
First field observations of one of the world’s rarest whales:
by TakFurTheKaffe in Tak Fur The Kaffe
Scientists have made the first ever field observations of the Omura's whale -- the least known species of whales in the world. The results are published in the open-access Royal Society Open Science journal.... Read more »
Cerchio, S., Andrianantenaina, B., Lindsay, A., Rekdahl, M., Andrianarivelo, N., & Rasoloarijao, T. (2015) Omura’s whales (Balaenoptera omurai) off northwest Madagascar: ecology, behaviour and conservation needs . Royal Society Open Science, 2(10), 150301. DOI: 10.1098/rsos.150301
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