Choose from 156 different sets of productivity ocean flashcards on Quizlet. This means that there is a peak in primary productivity between spring and summer and a dip during autumn and winter when productivity is light-limited. Describe how productive Antarctic sea ice is. Describe the physical characteristics of the Antarctic continental shelf. Light-limited Question 8 1 Pts Phytoplankton Can Counteract Sinking By All The Following Except: Swimming Upwards Small Cell Size. plants are _____ producers. Diatoms. What are non-limiting factors in the ocean? Primary productivity process will also require carbon dioxide besides oxygen during the night. In this lecture you have the opportunity to explore a number of examples of how ocean productivity varies. In warm weather (like the tropics year round, or the summer at temperate seas). STUDY. silica (makes many animals' shells), CO2 & H2O, Microscopic plants that are the dominant primary producers in the ocean (do 90-96% of primary production), coastal regions, because there is so much fertilizer with nitrogen and phosphorous, phytoplankton remove CO2 from the surface waters and store it in the deep ocean (they consume a lot of CO2 and bring it to the bottom with their bodies when they die). Describe the effects of ice scours on benthos. Calculating primary productivity. - In polar oceans, there is incredibly high productivity in the summertime. In the ocean, autotrophs which are responsible for primary production consist of phytoplankton, marine plants, and macroalgae since they all perform photosynthesis. polar primary productivity in the highest category, for example on the same scale as that . Open oceans produce the largest share of Earth's biomass because the net primary productivity (NPP) of the oceans is Low, but the large expanse of the oceans supports enormous numbers of producers such as phytoplankton The sun's radiation provides the energy for all of the following EXCEPT Plate Tectonics Too many "grazers" 16) Of the following statements about oceanic productivity in polar regions, which is/are true? 71) Productivity in polar oceans is: A) light-limited. primary productivity in the Arctic Ocean. PLAY. 7.4 Patterns of Primary Production Primary productivity varies both geographically and seasonally. 71) Productivity in polar oceans is: A) light-limited. Describe the physical characteristics of the Southern Ocean, -A circumpolar ocean surrounding a large continent, -Sea ice (pack ice)- formed from saltwater- freezing onto base of pack ice. B) nutrient-limited. B) nutrient-limited. water with low concentration of dissolved oxygen, How zooplankton stay below photic zone during the day, migrate up at night, -CO2 becomes sugar through photosynthesis/ chemosynthesis, the upper most region of the water column where there is enough light for photosynthesis to occur. Throughout the history of earth, physical forces acting on the oceans and the chemical processes taking place therein have never been at steady state, but rather have constantly changed. E) nutrient and oxygen-limited. ocean productivity are revealed by the following defi-nitions (Bender et al. Without the primary productivity process means there will be no food whether it is for the plants or the other living beings. Sample Day #3: Primary Productivity again is much lower than on Sample Day #1. are probably responsible, since Nitrate and Chlorophyll a levels are similar to previous days. Organic matter in the ocean is produced by photosynthesis (and chemosynthesis to a lesser extend) and destructed by respiration. Describe how salps could take over from Antarctic krill at the base of the food web. Consequently, primary production provides a key ecosystem service by providing energy to the entire food web in the oceans. A) coastal upwelling zones B) coral reefs C) equatorial upwelling zones D) mangrove swamps E) All of the above tropical areas have relatively high primary productivity. Why is the thermocline strongest in warm weather? It is not possible to understand the composition of seawater (or marine sediments) without understanding life processes. At this point, we know that there are at least three distinct biological communities in the Arctic True Nutrients can be either an elements or compounds and two important ions in the Ocean are NO2-, and PO43-? In the polar oceans, phytoplankton blooms (explosive population growth) occur during the summer months as a result of favorable light conditions which lead to short-term increased primary productivity. Primary producers of polar oceans Phytoplankton composed mainly by diatoms, haptophytes (coccolithophores), dinoflagellates and cyanobacteria. Humans are the primary cause There is a phylum of bacteria that can photosynthesize? Describe how primary productivity in the polar oceans is light-limited. Productivity in Polar Oceans The low availability of solar energy limits photosynthetic productivity in polar areas. Log in Sign up. (select all that apply) a. This is of considerable significance regionally, but still does not, of itself, imply that global phytoplankton production is underestimated at present. 276) Blue whales time their migration through middle latitude and polar oceans to coincide with maximum _____ productivity. -Antarctic macrobenthic diversity at least 6 times as high as Arctic. https://quizlet.com/14087866/primary-productivity-flash-cards False What is TRUE about primary causes of ocean acidification? Start studying Productivity in the Ocean. what is primary productivity? The poles (in the summer), since there is very cold water, so no thermocline, and light. zone where light does not penetrate (about 90% of the ocean), to create DNA, RNA, proteins—to keep themselves together, not biologically "useful" by all organisms, in a form that all organisms can use to make biomolecules and/ or power cells, special organisms (mostly bacteria) that convert inorganic nitrogen to organic nitrogen. In the polar oceans, phytoplankton blooms (explosive population growth) occur during the summer months as a result of favorable light conditions which lead to short-term increased primary productivity. The cold water at the bottom remains unaffected by heat, while the surface is heated, creating a great difference in density, leading to stratification. The year is split into periods of constant night and day. Geographically, phytoplankton abundance generally decreases as you move from coastal to oceanic waters (Figure 7.4.1). Variation in primary productivity, measured typically as the concentration of chlorophyll in water, is a primary determinant of all biological productivity up the food web and trophic pyramid. year, a drifting polar ice pack covers the central and western portions year-round, and sea temper-ature seldom rises above 0°C. Kelp are considered _____ algae. What are some problems with ocean fertilization when considering it as a means to mitigate global warming? Equations. The total amount of biological productivity in a region or ecosystem is called the gross primary productivity. Primary production is the most basic building block for energy and the basis for food webs in all environments and ecosystems. Coastal waters are more productive than the central ocean for two main reasons. Extra dissolved carbon dioxide in the ocean is the primary cause b. Primary productivity is strongly dependent upon light availability and the presence of nutrients, and thus is highly seasonal in the Arctic. Most of the primary productivity in the oceans is a result of a kelp forests b from OCEAN 320 at San Diego State University Total net primary production on Earth exceeds 100 billion tons of carbon per year, and it plays a profound role in the global carbon cycle. - In polar oceans, productivity is high year-round. Nearly all of Earth’s primary productivity is … colleenmcf. 234) ____ 235) Although primary productivity in tropical areas is generally low, which of the following tropical locations have unusually high primary productivity rates? After all, another importance of primary productivity in ocean is to maintain the diversity in the ocean to still exist. O Oxygen-limited. A combination of ice cover and reduced PAR (perhaps it was a cloudy day!) Learn productivity ocean with free interactive flashcards. Polar or high-latitude oceans: >60º north/south latitude The length of day really varies, so it’s sunlight (not nutrients) that limits productivity Get incredible productivity during the spring/summer on land, too Summarise the main biological differences between the Antarctic and Arctic. During these months, the Antarctic Ocean's upwelling zone … Primary production is the production of chemical energy in organic compounds by living organisms.The main source of this energy is sunlight but a minute fraction of primary production is driven by lithotrophic organisms using the chemical energy of inorganic molecules.. This means that there is a peak in primary productivity between spring and summer and a dip during autumn and winter when productivity is light-limited. Lecture 7 – Life in the Ocean – Primary Productivity and Respiration Life determines ocean chemistry and responds to it. blown in from areas that support primary production. -Diatom Neodenticula seminae (dominant primary producer in the North Pacific). The new figure is some sixteen times higher than an estimate made in 1975. There is little to no sunlight, which means that for most of the year, there is no primary production taking place. “Gross primary production” (GPP) refers to the total rate of organic carbon production by autotrophs, while “respiration” refers to the energy-yielding oxidation of organic car-bon back to carbon dioxide. 31 233) Productivity in polar oceans is _____. Thanks to primary productivity, we can measure how much sugar and oxygen are produced in water sources, especially in oceans and by terrestrial plants. Polar oceans belong to the most productive marine ecosystems. What primary productivity in polar regions actually looks like… Phytoplankton Figure 13.19a, page 421Zooplankton. Remove CO2 from our atmosphere increase, a huge burst in production occurs requires photosynthetic organisms, light, Lesson. Poles ( in the Arctic marine ecosystem vocabulary, terms, and thus is highly seasonal the. 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