Protoctists

Plankton (32)
Protoctist (10)
Protozoan (71)

Synopsis: 4.4. animals: Protoctists:

image Tim Sackton) 3. Asian Carp for depleting plankton and pushing out other species; 4. Coyotes for eating cows, sheep and other livestock,

like our amoeba ancestors, have a kind of subconscious desire to return to the primordial ooze to mate.

amoeba-like to fit in this new area. You basically have real-time management, which is something that is not currently possible in livestock grazing,

Food passes through their digestive system rapidly so they eat plankton and small crustaceans almost constantly.</

and other disasters can expect to see an explosion of shaggy-haired gallinippers(<i>Psorophora ciliata</i>)a type of giant mosquito according to entomologist Phil Kaufman of the University of Florida.</

As a result of suddenly lowered temperatures there may have been a global disruption in the numbers of both land plants and plankton in the oceans evidence

and North seas where it has caused serious environmental and economic damage by eating native zooplankton and fish.

He is remembered perhaps best for classifying life into the now-well-accepted domains of bacteria eukaryotes (plants animals fungi and protists) and archaea.

Iceland Volcano's Fiery Sunsets Ocean bloom Iron is key to ocean life helping spur the growth of single-celled organisms known as phytoplankton.

when volcanic iron fertilized the waters the resulting phytoplankton bloom sucked up other nutrients as well.

Since phytoplankton use carbon dioxide just like plants do volcanic ash falling on the ocean could reduce levels of the greenhouse gas in the atmosphere.

However the team estimated that the plume from Eyjafjallajã kull only triggered a 10 to 20 percent rise in carbon dioxide uptake by phytoplankton in the Iceland Basin compared to other years.

In order for volcanic iron to have larger effects on the atmosphere phytoplankton must really flourish.

Diatoms are one of the most common types of phytoplankton and a major group of algae.

There's this idea that the early diatom was a small flagellate but what we're finding at the base of the diatom tree are things that are long and tubular much like the tube inside of a paper towel roll said Edward Theriot professor of molecular evolution at The University of Texas at Austin and director of its Texas Natural science

Theriot uses TACC to host a web portal that supports the research in the lab called Protist Central.

</p><p>Pacific gray whales migrate thousands of miles from cold plankton-rich Arctic waters to relatively nutrient-poor tropical lagoons off of the coast of Mexico where they give birth.

Campylobacter Clostridium botulinum Clostridium perfringens Escherichia coli (E coli) Giardia lamblia Hepatitis a Listeria noroviruses rotavirus Salmonella Shigella Staphylococcus aureus and Vibrio vulnificus.

Another postdoctoral fellow in her lab Hauke Koch was the first to find that gut symbionts of bumblebees protect against protozoan parasites

These nutrients fuel phytoplankton growth in the sunlit surface waters. Since 1950 California has experienced more winters with weak coastal upwelling than in the last five centuries.

Phytoplankton at the surface rely on this seasonal influx of nutrients. These organisms are the backbone of the marine ecosystem and support huge populations of fish and seabirds.

Giardiasis an infection of Giardia parasites is one well-known cause of horrible-smelling poop. If you experience bad odor over a prolonged period

Spiculosiphon oceana an amoeboid protist is between 1. 5 and 2 inches (4 to 5 cm) tall

The images also show traces of phytoplankton blooms in the Great lakes and off the North Atlantic coast.

including acantharians (pictured) protists with skeletons made of strontium sulphate crystals. The results just blow the wheels off all estimates of microbial diversity,

After artemisinin At least US$175 million is needed to halt the spread of malaria parasites that are resistant to artemisinins,

such as protozoans. The toxins kill the other microbes, giving these bacteria an advantage. Not only are more E coli strains being infected with Shiga toxin,

single-celled, amoeba-like organisms in a kingdom he named Vendobionta3. Until the vendobionts went extinct,

The HSRC says that the iron was intended to fertilize phytoplankton, boosting ocean productivity and salmon populations.

which hosts the malaria parasites, are choosier: they prefer humans.""They love everything about us, says Leslie Vosshall, a neurobiologist at The Rockefeller University in New york, who led the latest study."

the brain-eating amoeba. Found mostly in warm freshwater lakes rivers and hotsprings Naegleria fowleri can travel up a person's nose

-and presto chango-ones goes from an amoeba to an elephant. well cool beans. But Even Darwin lost sleep over this.

Radiation is being in found in seaweed zooplankton and sea life in the oceans. Animal and plant mutations are being found everywhere.

More important in the near future the plankton the basic reservoir of the world's food live in the sea.

In addition to many species of bacteria the list includes giardia rabies and norovirus. According to the U S. Centers for Disease Control and Prevention norovirus is the most common cause of acute gastroenteritis in the United states causing 19-21 million illnesses

One possible reason for its extinction is the protozoan parasite Crithidia bombi which lives in the intestines of the buff-tailed bumblebee.

Single cell plants called phytoplankton feed off the increased nutrients and in doing so start a cascade of events that leads to low oxygen levels in the water bodies.

#Scientists find soaring variety of malaria parasites in batsresearchers have discovered a surprising diversity of malaria parasites in West african bats as well as new evidence of evolutionary jumps to rodent hosts.

Bats which are important reservoir hosts for many pathogens particularly viruses have been hosts to malaria parasites for more than a century said coauthor Susan Perkins an associate curator in the Museum's Division of Invertebrate Zoology.

Understanding the evolution of malaria parasites in bats and other animals and how they fit into the tree of life is key to understanding this important human disease.

Malaria is caused by a handful of species of parasites in the Genus plasmodium through the bite of mosquitos

They found a vast diversity of malaria parasites that included not just theplasmodium species but also members of three other genera.

The DNA from several genes of the bat parasites was sequenced at the Museum's Sackler Institute for Comparative Genomics resulting in the most comprehensive evolutionary tree of life for malaria parasites of bats to date.

which have nucleus amoebae and flagellates some of which are parasites. Animals plants and fungi are all eukaryotes;

Silberman and Brown perform comparative DNA sequence analyses of a type of eukaryote called protists to help find their particular placement or branch on the tree of life.

By isolating formerly unexamined anaerobic protists--a diverse group of unicellular microorganisms --and looking at the independent ways they have formed different types of mitochondria the researchers hope to reveal essential commonalities among all eukaryotes perhaps even clues that explain their origin.

This is what happened with the soil-living social amoeba Dictyostelium discoideum or Dicty. The single-celled amoebas crawl through the soil eating bacteria until food becomes scarce.

Then the amoebas gather by the tens of thousands to form a multicellular slug which transforms itself into a fruiting body:

a sterile stalk that holds aloft a sorus a tiny sphere that releases spores that become single amoebae again.

but some clones (genetically identical amoebas) also farm them --or at any rate they gather up the bacteria carry them to new sites and harvest them prudently.

Amoebas carrying seed corna lot of work has been done on this organism said Debra Brock a research scientist in the Queller/Strassmann lab

It looked like the amoebas were carrying the bacteria around to make sure they would always have food.

After all the amoebas are grown on bacteria in the lab; perhaps they had picked just up these bacteria by accident.

Amoebas carrying chemical weaponsbut the situation was actually more complex than this. Brock quickly realized that some of the bacteria found in association with the Dicty weren't edible.

Were these bacteria parasites on the amoebas? Were they free riders the amoebas picked up accidentally

when they picked up the food bacteria? Were they pathogens that were making the amoebas sick?

But the amoebas carrying these bacteria seemed to be thriving rather than sick. And she also knew that in other systems farmers carry defensive symbionts.

Leafcutter ants for example carry bacteria that help prevent other fungi from contaminating their fungal gardens.

Brock suspects the amoebas and the bacteria are cross feeding. They're probably providing something for those bacteria

--if the amoebas are dispersed to a site without a good source--farmers produce more spores than nonfarmers

These results suggest that social amoebas make farming pay much as human farmers all over the world have done by privatizing their crops.

whether they are celled single organisms like amoeba or enormous entities like Giant Redwoods (in which millions of cells make up the body of the organism).

It found evidence that the method may significantly reduce both the number of cases of malaria by up to 75%and the proportion of people infected with the malaria parasite by up to 90%when used in appropriate settings.

and a sufficient proportion of these habitats can be targeted LSM may reduce the number of cases of malaria and the proportion of people infected with the malaria parasite at any one time.

and the seabed was dominated by piles of pebble-like single-celled organisms called foraminifera. The'rainforests-of-the-sea'reefs were replaced by the'gravel parking lots'of the greenhouse world said Norris The greenhouse world was marked also by differences in the ocean food web with large parts of the tropical and subtropical ocean ecosystems supported by minute

A new study to be published in Nature's The ISME Journal reveals the profound effect it has on enriching soil with bacteria fungi and protozoa.

However growing oat and pea in the same sample caused a huge shift towards protozoa and nematode worms.

It is now possible to sequence RNA across kingdoms so a full snapshot can be taken of the active bacteria fungi protozoa and other microbes in the soil.

but instead found it contained a greater diversity of other eukaryotes such as protozoa. The findings of the study could be used to develop plant varieties that encourage beneficial microbes in the soil.

Malaria is caused by microscopic organisms called protists which are present in the saliva of infected female mosquitoes and transmitted when the mosquitoes bite.

Their study shows that one type of marine algae that has received little attention till now--dinoflagellate microalgae--is highly suitable for cultivation with the aim of producing biodiesel.

Though similar studies have been done on other alga species dinoflagellate microalgae have shown themselves to be a very promising group that stands out from the rest.

The possibility of creating energy from hydrocarbons extracted from organisms like marine phytoplankton the so-called third-generation biodiesel has several advantages.

Along the west coast of North america winds lift deep nutrient-rich water into sunlit surface layers fueling vast phytoplankton blooms that ultimately support fish seabirds and marine mammals.

and some plankton because their ability to build shell or skeletal material (via calcification) depends on the abundance of carbonate ion.

They matched the chemical signature of the mantas to that of zooplankton collected in the lagoons verifying that this habitat serves as an important feeding ground.

Using mathematical modeling we determined that many of the manta rays we encountered took around 80 percent of their energy from lagoon plankton Mccauley said.

Water from canals may have carried also harmful protozoa bacteria and viruses. But groups to the northeast would have been able to expand maize production into new areas as their populations grew he said.

Sarcocystis thermostable PCR detection kit developedconsumption of undercooked cyst-laden meat from cattle sheep and goats may cause infection in humans.

Sarcosytis spp are intracellular protozoan parasites acquired upon consumption of undercooked cyst-laden meat from cattle sheep and goats.

Sarcocystis sarcocysts in muscle biopsy specimens can be identified by microscopic examination of histological sections stained with haematoxylin and eosin and other stains such as PAS reaction.

Basic histological examinations by no means can help definitive identification of sarcocystis at spies level and warrants electron microscopy

Currently there are no commercially available PCR detection kits for sarcocystis. This kit can be of invaluable help for large scale quick screening of meat for sarcocystis

. thus its value cannot be overemphasized for not only meat industry but also the ministry concerned with food and meat safety.

Debris from forests that washes into freshwater lakes supplements the diets of microscopic zooplankton and the fish that feed off them--creating larger and stronger fish new research shows.

While plankton raised on algal carbon is more nutritious organic carbon from trees washed into lakes is a hugely important food source for freshwater fish bolstering their diet to ensure good size

which is consumed in turn by zooplankton: tiny translucent creatures that also feed on algae. The fish then feed on the zooplankton.

Until recently algae were believed to be the only source of food for zooplankton but the new research builds on previous work that showed they also feed on bacteria from forest matter drained into lakes.

The researchers worked along the food chains in the mini deltas. Where you have dissolved more forest matter you have more bacteria more bacteria equals more zooplankton;

areas with the most zooplankton had the largest'fattest'fish said Tanentzap. Areas of Daisy Lake closest to the nickel smelt-works remain bare--dirt

and rock instead of the once lush forest. The young fish in these parts of the lake were considerably smaller due to less available food.

a miniscule skeleton shrimp from Santa catalina Island in California a single-celled protist that does a credible imitation of a sponge a clean room microbe that could be a hazard during space travel and a teensy fringed fairyfly named Tinkerbell.

Amoeboid Protist: Body Builder from the Mediterranean Spiculosiphon oceana Location: Mediterranean sea This one-celled organism is four to five centimeters high (1. 5 to two inches) making it a giant in the world of single-celled creatures.

This foram (part of a distinct group among the many amoeboids) from the Mediterranean sea gathers pieces of silica spicules

It ends up looking much like a carnivorous sponge as well as feeding like one extending pseudopods (a protist's version of arms) outside the shell to feed on invertebrates that have become trapped in the spiny structures.

Specifically the so-called MR (mannose receptor) could be a safe door of entry for certain bacteria protozoa parasites and viruses like SRLVS into the target cell

Warming has resulted already in plankton fish and invertebrate communities shifting northwards. In northern marine areas the diversity and biomass of fish populations have increased.

and protozoa that can contaminate food and cause disease. Asia accounts for the majority of the worldâ##s reuse of wastewater in irrigation

the whole world shows that the ciliates in their guts have evolved in parallel with them. This is the result of a five-year research project performed by evolution biologists microbiologists

There the ciliates one-celled organisms bearing hairlike structures are especially important. By investigating ciliates in excrement and gut fluids the researchers in Nijmegen have been able to shed light on the evolution of two sorts of herbivores:'

'foregut fermenters'such as cows goats and sheep and'hindgut fermenters'such as horses elephants and zebras.

Ciliate DNA Extensive genetic research into ciliates to analyse their family tree diversity and distribution over hosts involved investigating 484'18s rrna genes'the fragments of RNA responsible for protein synthesis.'Our most important discovery is that ciliates are extremely diverse'says evolution biologist Johannes Hackstein.'

'We hadn't expected that given their appearance.''It turned out that the ciliates of hindgut fermenters were very species-specific

and originated early on in evolution just like the hosts themselves. The ciliates of foregut fermenters are not species-specific

and evolved much later. So from the evolutionary point of view the oldest animals have the oldest ciliates in their excrement.

Transmission According to Hackstein a possible explanation for the differences is the way ciliates are transmitted.''In hindgut fermenters transmission occurs via coprophagy (eating excrement)

and that happens almost exclusively in extremely young offspring. Ruminants on the other hand can be infected with ciliates throughout their lives.

However this still does not explain how the huge ciliate diversity arose and how this can be sustained.'

'Story Source: The above story is provided based on materials by Radboud University Nijmegen. Note: Materials may be edited for content and length.

The research team's goal is to produce a low-cost diagnostic that may also test for the presence of several other parasites including giardia the cause of another intestinal disease.

The blight, Phytophthora infestans, is considered now a water mold, more closely related to the malaria parasite. It thrives in cool,

Ocean plankton are one of the biggest CO2 sucks on the planet, and if you fertilize them there might be more blooms.

< Back - Next >

Overtext Web Module V3.0 Alpha
Copyright Semantic-Knowledge, 1994-2011