III. This paper defines the most abundant centric diatoms and coexisting species in the phytoplankton of karst lakes in Croatia as contri-bution to better description of phytoplankton func-tional groups dominated by centric diatoms. I. Phytoplankton are most abundant in the upper few hundred feet of most bodies of water because. people in north america consume more meat per capita than people in other regions of the world. (ii) Krill is the primary consumer in this food web (iii) The secondary consumers are Arctic Cod and Ringed Seal. D)Boreal forests have larger dominant plant growth forms than tundras, Phytoplankton are most abundant in the upper few hundred feet of most bodies of water because, C)Sunlight does not penetrate to great depths in the water. which of the following describes the changes in a countrys demographics as it begins its transition from a pre industrial state to an industrial state: population increases rapidly, birth rate remains high, death rate decreases. species into coda. Ships and whales use the same channels, which can increase the number of ship strikes. Phytoplankton responses. Which environment is characterized by the highest diversity of tree species? it is expected to drop to 0.5% by 2050. partly because of increases access to birth control in dveloping nations. 23) At which time after clearcutting does the ecosystem exhibit the greatest species richness? AND • Increasing absorption of the sun's energy warms the water surface further, which leads to further ice melt (completes positive feedback loop). To ensure the best experience, please update your browser. Which environment is most likely to be characterized by dry scrub with frequent fires? limited educational opportunities for women. The explanation for the variation includes which of the following? Which of the following diagrams correctly illustrates in nitrogen cycle? Many species, including some whales and birds, will travel thousands of kilometers during annual migrations. Describe one strategy that could reasonably be implemented to decrease right whale deaths caused by the commercial activity you described in part ii. open oceans produce the largest share of earths biomass because the NPP of the oceans is low, but the: large expanse of the oceans supports enormous numbers of producers such as phytoplankton. C)Increased environmental disturbances from human activities altered bird habitats. In the upper 100 m of the water column, their relative contribution remained approximately 1% until the onset of stratification, and persisted at 0.5–1% between 80 and 120 m throughout the summer. What are phytoplankton? which latitude shown on the diagram above experiences 24 hours of daylight on december 21. which of the following statements is consistent with the graphs above? One hundred and nine phytoplankton taxa were collected during this study, the majority of which were Chlorophyta (49 taxa), Desmidiaceae (23), Cyanophyta (14), Diatomeae (10), Euglenophyceae (7), Chrysophyceae (3), Dinoflagellata (2) and Cryptophyceae (1). Describe how the change in sea ice habitat is affecting polar bears' ability to hunt and feed. 1958). the explanation for the variation includes which of the following? of stratification of the upper 100 m. The relative ability of flagellates and diatoms to react to varying growth conditions, in turn dependent on hydrography, is discussed. c. They can most readily hide from predators there. J.A. Before construction begins, what experimental data should the student collect in order to eventually test the hypothesis? the best explanation for the lower humidity is that: warm air rises at the equator, cools, and sinks at 30 degrees latitude. 3.The cultured phytoplankton genera were chosen based on the most abundant taxa in the phytoplankton database of the Finnish Environment Institute (SYKE). -Limited food/water supply leads to migration to locations with more food/water supply. Describe one commercial activity other than whaling, that may result in the death of right whales. Nearly 50 percent of right whale deaths are anthropogenic in nature. Approximately how many more mammal species became extinct in the period 1901-2000 than became extinct in the period 1801-1900? Phytoplankton are most abundant in the upper few hundred feet of most bodies of water because. 1. Melting of sea ice leads to a decrease in albedo, or reflectivity leads to water surfaces absorbing more of the sun's energy. . 17) Which of the following is the most likely reason that the greatest number of extinctions of bird species occurred in the period 1901- 2000? These, especially copepods, which range in size from nearly microscopic to about a half-inch, and the shrimp-like krill, are he most abundant multi-celled animals in the sea and are critical food supplies for fish and baleen whales. Like land vegetation, phytoplankton uses carbon dioxide, releases oxygen, and converts minerals to a form animals can use. The two islands are about ten kilometers apart, and all the birds are the same species. Ringed seals, the preferred prey of polar bears, come to holes in the summer to breathe. Phytoplankton are free-floating, microscopic algae that inhabit the sunlit, upper layer of most freshwater and marine environments. Down in the ocean depths, lots of nutrients are available for the phytoplankton, but without sunlight, they can't grow. Phytoplankton culturing. 5) The terrestrial biomes shown in the diagram vary in net primary productivity. For the phytoplankton to use the nutrients, the nutrients must be transported to the surface. They feed on zooplankton, which are found only in the top layers of water. Phytoplankton is important also in the global carbon cycle, and therefore the global climate, because the phytoplankton, or organisms higher in the food chain, sink to the ocean floor when they die. 18) Which species grows best with full sunlight? The North Atlantic right whale migrates between subtropical and polar water annually. Most of the phytoplankton in inland waters obtain all of their energy from light and their chemical requirements from dissolved inorganic solutes, i.e., they are photolithotrophs. which of the following statements is best supported by the population doubling times indicated on the map? another likely cause for this decline is: increasing numbers of women entering the workforce in developing nations. Phytoplankton are most abundant in the upper few hundred feet of most bodies of water because: a. (i)The primary producer in this food web is phytoplankton. Explain how melting sea ice leads to a feedback loop that increases Arctic warming. B (high/constant temp and low precipitation w/ peak in winter). The word "trophy" refers tothe rate of … Associated phytoplankton, with a share of 3% UPA (Utermöhl phytoplankton assemblage cell abundance), primarily consisted of Dinophyceae. Since phytoplankton require the sun's energy to turn carbon dioxide and water into food and energy via photosynthesis, they inhabit the sunlit upper layers of freshwater and marine environments. Increased education of ship captains and crews about whale habitat/migration routes/feeding behaviors in order to reduce ship collisions with whales. Raven, S.C. Maberly, in Encyclopedia of Inland Waters, 2009. Phytoplankton is the basis of different food webs that survive in water. which of the following measures would be most likely to promote fertility above replacement level? In Antarctica, Adélie penguins depend on polynyas, where phytoplankton are abundant, throughout much of their lives. Even the smallest twilight zone inhabitants can be powerful through sheer number, however. The carbon in the phytoplankton is soon covered by other material sinking to the ocean bottom. Several otherpigments, such as chlorophyll b, c, d and e, carotenoids, xanthophyllsand biliproteins, can be found in plants. surface oceanic circulation results most directly in the distribution of: heat from tropical to temperate and polar regions. The highest concentrations generally are near the surface where the sunshine is most abundant. 21) The zone that has the highest biodiversity, Open oceans produce the largest share of Earth's biomass because of the net primary productivity (NPP) of the oceans is, Low, but the large expanse of the oceans support enormous numbers of producers such as phytoplankton. Phytoplankton obtain energy through the process of photosynthesis and must therefore live in the well-lit surface layer (termed the euphotic zone) of an ocean, sea, lake, or other body of water.Phytoplankton account for about half of all photosynthetic activity on Earth. ... the most abundant algae in most samples, were more numerous southward. Of the following ecosystems, which has the lowest net primary productivity, measured as kilocalories of energy produced per square meter per year? The algal classification follows the taxonomy and trivial names of AlgaeBase (Guiry and Guiry, 2014).Class, order, and species of the cultured strains are presented in Table Table3. Oh no! Among the common kinds are cyanobacteria, silica-encased diatoms, dinoflagellates, green algae, and chalk-coated coccolithophores. A student has hypothesized that the shade cast by the solar panels will increase the mortality of creosote bush, a native desert plant in the area. The species of Cyanophyta and Chlorophyta that wrere most abundant in the surface samples also dominated the phytoplankton at 1 m. Four of the five major pulses (two in later summer and three in winter) that took place during the year at the surface also … which of the following annual population growth rates is paired with the correct doubling time. Iii Identify a secondary consumer. the best explanation for the lower humidity is that: 6) Correct statements about the northern spotted owl include which of the following? low, but the individual producers found there are huge in size. The units (cells, colonies, and filaments) were enumerated to at least 100 specimens of the most abundant species (Lund et al. india has a higher population growth rate than china and australia have. The primary producer in this food web is phytoplankton. Most of them belong to nanophytoplankton (Equivalent Sphere Diameter is 10–15 μm). The target species for this study, Pentapharsodinium dalei, is a small thecate dinoflagellate common in shallow marine environments north of the North Atlantic Current . All of the following statements about invasive exotic species are true EXCEPT: D)They tend to have low reproductive rates. The biggest impact was seen a few hundred feet deep in the water column, at the point where phytoplankton have enough light from above to still grow, and are receiving the most … phytoplankton are most abundant in the upper few hundred feet of most bodies of water because: sunlight does not penetrate to great depths in water. As the amount of sea has decreased, larger expanses of the Arctic Ocean are now completely free of sea ice for several weeks each summer. Derived from the Greek words phyto (plant) and plankton (made to wander or drift), phytoplankton are microscopic organisms that live in watery environments, both salty and fresh.. Learn more about phytoplankton in this article. Marine life, or sea life or ocean life, is the plants, animals and other organisms that live in the salt water of the sea or ocean, or the brackish water of coastal estuaries.At a fundamental level, marine life affects the nature of the planet. The microscopic phytoplankton are suspended in the seawater. Why are phytoplankton most abundant in the upper few hundred feet of most bodies of water that is the depth to which sunlight can penetrate Earth's deserts are mostly 30 degrees north and 30 degrees south latitudes where humaidity is lower. The marine zooplankton community includes many different species of animals, ranging in size from microscopic protozoans to animals of several metres in dimension. But some, like gelatinous siphonophores, can form chains that extend as much as 130 feet, making them among the biggest animals that exist today. the world population growth rate in 2015 is about 1%. This is important for a few reasons. Given that beak size is generally determined, which of the following hypotheses is the most likely explanation for the difference in data between the islands? We must drill a hole through the ice to obtain water samples at various depths below the ice. Identify a primary producer in this food web. Phytoplankton, a flora of freely floating, often minute organisms that drift with water currents. E)The direct sunlight received by the creosote bush in the desert area during a 12 month period. low, but still higher than that of other ecosystems of the world. II. deposition of organic matter on the deep ocean floor. D)Decomposition of organic matter on the deep ocean floor. Some phytoplankton are bacteria, some are protists, and most are single-celled plants. -Shows the flow of energy among trophic levels. d. Sunlight does not penetrate to … Most of it is tiny, just a few inches long or less. which of the following is an example of a carbon sink? The zone in which species are adapted to the lowest light and the highest pressure? Most are buoyant and float in the upper portion of the ocean where sunlight can reach them. answer choices ... low, but the large expanse of the oceans supports enormous numbers of producers such as phytoplankton. The zone in which then the greatest total mass of carbon dioxide is absorbed from the atmosphere. This next level includes small crustaceans that eat phytoplankton and microzooplankton. the terrestrial biomes shown in the diagram above very in NPP.
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