Sentences with phrase «in marine food webs»

Fate, kinetics and metabolism of phycotoxins of human health concern in marine food webs.

But that doesn't mean that the consequences don't exist, from changes in marine food webs to shifts in oceanic and atmospheric chemical composition.

Haddock thinks the importance of jellyfish in marine food webs has been unappreciated and underestimated.

The goal is a better appreciation of the huge role that jellies play in the marine food web, as well as a more complete inventory of how carbon (fundamental to both life and climate) is distributed in the ocean.

The shells of marine snails known as pteropods, an important link in the marine food web, are already dissolving.

Not exact matches

Scientists in B.C. and the U.S. have several questions they are pursuing - the pyrosome's feeding behavior, the environmental variables the affect their numbers and the impact on the marine food web.

«So the contamination of long - lived radionuclides in different organisms in the local marine food webs needs to be monitored continually.»

The researchers looked specifically at the average fishing revenue in 106 Alaskan communities for 10 years before and after 1989, a year when the North Pacific Ocean experienced a significant shift in productivity and abrupt changes in the composition of marine food webs, while at the same time the global price for salmon dropped because of competition from farm - raised fish.

MEDDLESOME MERCURY Increased runoff into Earth's oceans could increase methylmercury concentrations in marine ecosystems by altering the food web, new laboratory tests show.

«This paper is significant because it identifies a link between ocean conditions and the magnitude of the toxic bloom in 2015 that resulted in the highest levels of domoic acid contamination in the food web ever recorded for many species,» said co-author Kathi Lefebvre, a marine biologist at NOAA's Northwest Fisheries Science Center.

But when a giant shelf collapses — as Larsen A and B did in 1995 and 2002 — solar - powered plankton production ramps up, and scientists think it could jump - start a complex food web of diverse marine life.

The scientists developed a mixotrophic model of the global ocean food web, at the scale of marine plankton, in which they gave each plankton class the ability to both photosynthesize and consume prey.

«Our future work will focus on the ways in which smaller organisms that feed on marine snow may be affected by the toxicity, and how that in turn can affect the larger food web.»

Thus, past and future increases in atmospheric nitrogen deposition have the potential to alter the base of the marine food web; and, in the long term, the structure of the ecosystem.

«While the changing seascape has dramatically altered and increased the diversity and number of small creatures at the base of the marine food web, we still don't know how these changes in the ecosystem will propagate through the entire chain.

«This can help us determine mechanisms that influence species composition in planktonic communities exposed to red tides, and suggests that these chemical cues could alter large - scale ecosystem phenomena, such as the funneling of material and energy through marine food webs.»

2016 Mar 180 (3): 889 - 901, doi: 10.1007 / s00442 -015-3489-x BIOACID in brief: Under the umbrella of BIOACID (Biological Impacts of Ocean Acidification), 10 institutions examine how marine ecosystems react to ocean acidification, how this affects the food web and the exchange of material and energy in the ocean and how the changes influence the socio - economic sector.

Unicellular photosynthetic microbes — phytoplankton — are responsible for virtually all oceanic primary production, which fuels marine food webs and plays a fundamental role in the global carbon cycle.

But in the world of marine microbial ecology, there are very few model systems and associated tools that enable scientists to deeply explore the physiology, biochemistry, and ecology of marine microbes, which drive the ocean's elemental cycles, influence greenhouse gas levels, and support marine food webs.

Consequently, in the past 20 years his research has evolved from an early focus on prioritizing the effects that humans have on coral reefs and the role that marine protected areas play in conserving biological diversity and ecological processes, to developing theoretical and simulation models of coral reefs that will help predict and suggest alternatives to reduce detrimental effects, to developing practical means to restore degraded reefs through manipulation of the food web and management.

«We documented for first time marked changes in the pelagic food web length in response to various natural and anthropogenic related stressors,» said lead author Rocio I. Ruiz - Cooley, formerly of NOAA Fisheries» Southwest Fisheries Science Center and now at Moss Landing Marine Laboratories.

Between 2009 and 2017, the German research network BIOACID (Biological Impacts of Ocean Acidification) investigated how different marine species respond to ocean acidification, how these reactions impact the food web as well as material cycles and energy turnover in the ocean, and what consequences these changes have for economy and society.

These tiny marine snails that appear winged and beautifully translucent in close - ups are essential to the ocean food web.

Oceanic uptake of anthropogenic carbon dioxide (CO2) causes pronounced shifts in marine carbonate chemistry and a decrease in seawater pH. Increasing evidence indicates that these changes — summarized by the term ocean acidification (OA)-- can significantly affect marine food webs and biogeochemical cycles.

Both marine and freshwater species are affected by acidifying water in ways that disrupt the entire food web, scientists warn

Also of concern is that a large class of plankton, floating in the open oceans and forming a vital component of marine food webs, appears equally vulnerable to acidification.

About BIOACID: Since 2009, more than 250 BIOACID scientists from 20 German research institutes have investigated how different marine organisms respond to ocean acidification and increasing carbon dioxide concentrations in seawater, how their performance is affected during their various life stages, how these reactions impact marine food webs and elemental cycles and whether they can be mitigated by evolutionary adaptation.

The newly revealed information about the growth of phytoplankton in polynyas could provide scientists with improved insights into how the marine food web in the Antarctic works and how this could be impacted by climate change.

The name is an acronym for «Biological Impacts of Ocean Acidification «within which 14 institutes explore how marine organisms react to ocean acidification and the impact on the food web, the ecosystems in the sea and ultimately also on the economy and society.

This «kelp highway hypothesis» suggested that highly productive kelp forests supported rich and diverse marine food webs in nearshore waters, including many types of fish, shellfish, birds, marine mammals, and seaweeds that were similar from Japan to California, Erlandson and his colleagues also argued that coastal kelp forests reduced wave energy and provided a linear dispersal corridor entirely at sea level, with few obstacles to maritime peoples.

«This loss of top predators could hold serious implications for the entire marine ecosystem, greatly affecting food webs throughout this region,» said the lead author of the study, Francesco Ferretti, a doctoral student in marine biology at Dalhousie University in Nova Scotia.

As an essential part of the marine ecosystem, they keep food webs in balance, keep prey populations healthy, and keep sea grass beds and other vital habitats healthy, for starters.

Phytoplankton, which live close enough to the water's surface to perform photosynthesis — critical to maintaining oxygen in Earth's atmosphere — form the base of the marine food web.4 Although phytoplankton are microscopic, they can be seen from satellites when they grow in a concentrated area (bloom) on the ocean's surface.5 Zooplankton, which feed on phytoplankton, and bacterioplankton, which recycle nutrients in the water, make up the next levels of the web.4

Phytoplankton are the dominant plants in the sea, and are the basis of the entire marine food web.

How marine mammals will respond to the expected shift towards smaller phytoplankton and smaller zooplankton and a decrease in the lipid - rich food web is unclear.

The most significant threats to arctic marine mammals comprise loss of sea ice habitat and its associated highly productive food web along with the increase in anthropogenic activities at high latitudes (Ragen et al. 2008).

24: Oceans).135 Acidifying changes in ocean chemistry have potentially widespread impacts on the marine food web, including commercially important species.

These organisms form a crucial component of the marine food web that sustains life in the rich waters off Alaska's coasts.

Both marine and freshwater species are affected by acidifying water in ways that disrupt the entire food web, scientists warn

Identification of abundant groups in bacterial communities is important in assessing roles in carbon cycling and ocean biogeochemical processes, and as a component of some marine food webs.

«Earth system models» include all that and much more: forests that can shrink or spread as conditions change; marine food webs that react as the oceans grow more acidic with carbon dioxide; and aerosol particles in the atmosphere that interact with greenhouse gases, enhancing or sapping their warming power.

In addition to altering marine food webs, iron fertilization could produce greenhouse gases more potent than carbon dioxide, such as nitrous oxide and methane, or block sunlight needed by deep coral reefs.

For example, the warm - water phase of ENSO is associated with large - scale changes in plankton abundance and associated impacts on food webs (Hays et al., 2005), and changes to behaviour (Lusseau et al., 2004), sex ratio (Vergani et al., 2004) and feeding and diet (Piatkowski et al., 2002) of marine mammals.

Since phytoplankton form the base of marine food webs, the world's most productive fisheries are located in areas of coastal upwelling that bring cold nutrient rich waters to the surface (especially in the eastern boundary regions of the subtropical gyres); about half the world's total fish catch comes from upwelling zones.