biotic factors impacting carrying capacity of sea otters

Also, the growth pattern used was based on observed populations from 1995 to 2005, which may have changed more recently. MATTER recycles WITHIN ecosystem and is REUSED Carbon cycle . Next, the population began to increase rapidly, in a section of the log curve known as the log phase. 8-4, p. 164. An ecosystem includes both biotic and abiotic factors: Biotic factors = _____. THIS RESOURCE IS ONLY AVAILABLE TO LOGGED IN USERS. Smaller areas of anchored kelp are called kelp beds.Kelp forests occur worldwide throughout temperate and polar coastal oceans. of a sheep population on the island of Tasmania between 1800 and 1925. Please check your email Students also produce an argument on whether the sea otter has met criteria and should be removed from the endangered species list. Students explore the world of population biology using the sea otter as a case study. For many years, there were no sea otters in Canadian waters and most of the sea otters in the world were located in the Aleutian Islands, off of the coast of Alaska. Instead, it’s better to have an understanding of the types of abiotic and biotic factors that would affect their populations. The conservation and management of sea otters has benefited from a dedicated research effort over the past 60 years enabling this species to recover from a few thousand in the early 20th century to about 150,000 today. ... Several factors historically restricted gene flow within the sea otter popula-tion. PLEASE LOGIN AND TRY AGAIN. This too happened in the sea otter population, as they experienced an average rate of change of over 19% per year from 1977 to 2004. To reach the optimum sustainable population level under the Marine Mammal Protection Act, which is the number of animals that will result in the maximum productivity of the population while considering carrying capacity and ecosystem health, the southern sea otter population would likely have to reach at least 8,400 animals in California alone. Secondly, oil spills result in the death of sea otters. This species may have been subject to high levels of mortality in the gill-net fishery for totoaba (Totoaba macdonaldi) in the 1960s and early 1970s (prior to a ban on totoaba fishing). There was a problem previewing Ecology Study Guide.pdf. 2019a) and variability in the history of sea otter recolonization and expansion in SEAK (Burris and McKnight 1973, USFWS 2008, 2014b). Firstly, when initially introduced to the new environment, the sea otters experienced repressed growth. SC.912.L.17.2 Explain the general distribution of life in … The growth rate of a population decreases as its size nears the carrying capacity of its environ- ment because resources such as food and water begin to dwindle. If the conditions of the oyster's habitat are not favorable then the oyster population will … Figure 1: Sea otter population measured off the coast of Vancouver Island. October 24, 2014 Population Distribution *Most common-Uneven distribution ... • Biotic potential: populations capacity for growth ... • Limiting factors • K = carrying capacity Describes how limiting factor affects increasing population . Keystone Paine Zoologist Robert T. Paine, who coined the term "keystone species," had an unorthodox way of doing his work. Follow the video with a quick question and answer discussion. As the population expanded, they mostly increased in numbers in their current habitat rather than expanding to reclaim lost territory. Sea otter. Sorry! Exponential growth starts slow then accelerates, yielding a J-curve. These predators hunt in pods, drastically improving their effectiveness. Figure 8-2 Changes in Population Size: ... • e.g. The vaquita (Phocoena sinus) is a small porpoise found only in the northern Gulf of California. 2.Abiotic factors cause changes in biotic factors in a ecosystem ... Sea Otter Beaver HUMAN IMPACT A Sad True Story ... down, as we get closer to CARRYING CAPACITY. Coral is a biotic because it is a main food source for many organisms in the Great Barrier Reef. Otter presence was detected at 195 of the 250 sites surveyed (78.4%). Students might also generate charts, graphs, and histograms from data sets. The tiny worm like parasites enters the sea otter's body through the food it eats. Most populations live in clumps although other patterns occur based on resource distribution. 5-1 How Do Species Interact? Biotic Factors. Teacher should print cards (1 set for every pair of students) and cut cards for vocabulary sorting activity. Explain how biotic and abiotic factors relate to ecology. Obviously in practise, there are many factors that contribute to population growth, and no population will directly follow the logarithmic curve. This resource requires special permission and only certain users have access to it at this time. Example: Bioaccumulation ... • Carrying Capacity: population number an ecosystem can support. By Isabelle Rios | January 17, 2019 We previously learned that carrying capacity, or the maximum number of individuals that an environment can sustain over time without destroying or degrading the environment, is determined by a few key factors. Carrying capacity describes the maximum number of individuals or species an specific environment's resources can sustain for an indefinite period of time without degrading it. Number of sheep (millions) Overshoot. Carrying Capacity . The students will be given feedback during a card sort identifying their knowledge of the vocabulary required for the exercise. 2/28/12 3 POPULATION DYNAMICS AND CARRYING CAPACITY ! Biotic factors include the plant, the bacteria in the soil, and the care a person takes to keep the plant alive. In this phase, a rapid increase in population can be attributed to an adequate population size, and an abundance of resources. In coastal regions, the sea otter is a keystone Carrying capacity. This resource requires you to be logged in to iCPALMS. Set a 3 minute timer and instruct the students that they have 3 minutes to match the words to the definitions. The student will be able to describe how births, deaths, immigration, emigration, abiotic, and biotic factors affect population size of California sea otters. Key Takeaways: Biotic and Abiotic FactorsAn ecosystem consists of biotic and abiotic factors.Biotic factors are the living organisms in an ecosystem. ...Abiotic factors are the nonliving components of an ecosystem. ...The limiting factor is the single component that limits the growth, distribution, or abundance of an organism or population. Start studying unit test 1. The carrying capacity is the largest population that an environment can support ... A. biotic factors in a forest How are the factors above used to calculate or determine carrying capacity? WE APOLOGIZE BUT THIS RESOURCE IS NOT AVAILABLE TO YOU. This was not only due to a small initial population size, but also a rapid change in environment for the relocated creatures (Province of British Columbia, 2003). In the most recent study in 2008, the sea otter population in British Columbia had increased to about 4,700, up from 3,200 in 2004. 13 Biomass and energy transfer at the lowest trophic level determines the carrying capacity of the ecosystem. In general, the current otter population is stable, however its troubled past and vulnerability to oil spills result in the need to protect the species (Fisheries and Oceans Canada, 2013). ... amphibians, and algae. ... and largely determine an area’s carrying capacity. Class discussion throughout the lesson plan provides multiple opportunities for assessing student understanding: A final opportunity for assessment occurs during the graphing activity. Examples would be water currents that move in different directions, geological barriers such as seamounts, hydrothermal vents, ridges all act as barriers for larve dependent species to settle on. Sea Otters have two types of hair. People affect sea otter populations through direct shootings and trapping sea otters in fishing nets. Sea otters live in communities with many other species including sea urchins, orcas, starfish, and many types of fish. Figure 8.4. The student will be able to explain population density, logistic growth, exponential growth, and carrying capacity. Our carrying capacity estimates are helping set population recovery targets for sea otters in Canada, and our habitat predictions represent a first step in Critical Habitat identification. Population. Figure 8.4. Once an animal or plant is listed under the Endangered Species act, who ultimately manages the population? Noted sea otter researcher Tim Tinker of the United States Geological Survey called this “a major OS upgrade to sea otter science” and a change from the previous perception that sea otters were a species “on the edge,” with many threats affecting their survival. Because the sea otter only lives for around 10-20 years (Environment Canada, 2011), and is only able to produce one offspring every year, the population does not have the ability to grow quickly. Other factors in the sea otter decline may include a decrease in the number of sea urchins—one of sea otters’ preferred prey items—following a few years of relatively large urchin populations, as well as compromised water quality in the nearshore environment due to pollution and agricultural runoff. The sea otter (Enhydra lutris) is a marine mammal living near the shores of the North Pacific, from northern Japan, the Kuril Islands and Kamchatka east across the Aleutian Islands and along the North American coast to Mexico.It has the thickest fur in the animal kingdom. their are biotic and Abiotic factors too. How touse data about population dynamics, abiotic factors, and biotic factors explain a change in carrying capacity and population size in an ecosystem. There was a problem previewing Ecology Study Guide.pdf. ... K is the carrying capacity. Otters are long and slim animals with four short legs that can be longer than a meter. They usually stay on all four legs, but they can stand up as well but they are expert swimmers and spend a lot of time in water. They have a thick fur coat that keeps them warm even in freezing water. 8-4, p. 164. Fig. This formative assessment will give you the opportunity to assess initial understanding and introduce concepts for the lesson plan. If the worksheet is printed and passed out, provide students with the following links: The summative assessment will be given after the graphing exercise and following discussion. Can sea otter growth be explained using both logistical and exponential growth? However there are sources of error within this estimation. FAQs; All in All; Citations; Biotic Factors. the parasite then implants itself into the sea otter's intestines and eats them resulting in illness and possibly death. Whoops! Students will also be helped during the graphing process and subsequent analysis of a sea otter growth curve. Abiotic Factors Non-living chemical and phisical parts of the enviroment that affect living organisms and the functioning of ecosystems. a. Oysters can only survive in habitats that fall in a certain range of salinity levels.The water salinity in the bays of Assateague tends to increase when the sea level rises. In fact, when the sea otter population was initially introduced, it experienced negative growth. An example of a biotic factor in this ecosystem is the keystone species. Biotic factors are the interactions between organisms. Presentation Summary : Carrying Capacity How do limiting factors effect a population? The question and answer session after the video (Engage section), the discussion after the vocabulary word sort activity (Explore). Depending on resources available, students can work independently, in pairs, or in small groups. Kelp forests provide stabilizing shelter for sea otters, and nutrient-rich food for their prey, such as fish and sea urchins. of a sheep population on the island of Tasmania between 1800 and 1925. Sea otters are a keystone species found on the west coast of the United States that are endangered. Environments Carrying Capacity The Wildlife Management calculated a linear, coast-wide carrying capacity of 52,459 sea otters which is a more realistic upper limit to sea otters in British Columbia. Limiting factors are either biotic or abiotic environmental factors that ... Acting separately or together, limiting factors determine the carrying capacity of an environment for a species. card_sort_for_sea_otter_spotter_vocab_review.docx, sea_otter_growth_and_population_report.docx, the_population_biology_for_sea_otter_spotter.pptx, Feature Story: Slowly Swimming Towards Recovery, California's Sea Otter Numbers Holding Steady, Final Revised Recovery Plan for the Southern Sea Otter, CPALMS License - no distribution - non commercial. Biotic factors are influences on the ecosystem by living things. For this reason, it is more difficult for the sea otter population to expand to other geographical locations. Biotic and abiotic factors work together to create a unique ecosystem. The number of otter spraints per transect ranged from 0 to 0.24 spraints m −1.In the abundant group, the number ranged from 0.07 to 0.24, in the normal group from 0.003846 to 0.06, and in the rare group from 0.000937 to 0.00381 ().Whereas occupied sites were distributed throughout the Nakdong River basin, otter … Technological, social, and cultural changes have extended the earth’s carrying capacity for human Although this does not make sense in theory, as the current population of around 4,000 is far less than the carrying capacity (14,000), there is an explanation. Another reason that sea otters are susceptible to oil spills is because they often travel in large same-sex rafts (Environment Canada, 2011). This limits the population because rather than having the space to exponentially expand the population, they are confined to an area which will likely reach its carrying capacity, and stunt the population growth (Environment Canada, 2011). There are many limiting factors of life in the amazon rain forest both density dependent and independent. What are three abiotic and three biotic factors that might affect population growth? Abiotic factors are the non living components of an ecosystem. Examples. Biotic factors include plants, bacteria, fungi, birds, worms, animals, etc. Abiotic factors include sunlight, water, air, chemical elements, minerals, soil, temperature, etc. Boom and bust: logistic growth . The assessment involves writing a report using specific criteria. Pass out the Sea Otter Spotter Graphing Activity worksheet, which will provide instructions for students, and provide students with the attached Excel file "Sea Otter Census Data 1983-2014.". One which forms a waterproof outer layer and the under fur is very dense to keep the animal insulated. Nitrogen cycle. COMMENSALISM (+, 0) • In some interactions, one species benefits and the other is not harmed • Epiphytes • Birds nesting in trees . The student will be able to graph sea otter data and interpret the growth curve. The student will be able to explain population density, logistic growth, exponential growth, and carrying capacity. Ocean ecosystems are impacted by abiotic factors in ways that may be different from terrestrial ecosystems. To find carrying capacity on a graph, you need to locate the point on the graph where the population line is horizontal. An example of a biotic factor in this ecosystem is the keystone species. Biotic potential, the maximum reproductive capacity of an organism under optimum environmental conditions.It is often expressed as a proportional or percentage increase per year, as in the statement “The human population increased by 3 percent last year.” It can also be expressed as the time it takes for a population to double in size (doubling time). Ecologists will report on this and other climate-ecosystem research news at the Ecological Society of America’s 2014 Annual Meeting in … For many years they have been in recovery. Sea otter numbers have declined in southwestern Alaska over the past 20 years. Some examples of density dependent are diseases, food, shelter, space, and predator pray.Some examples of density independent factors that occur in the amazon rain forest are humans, natural disasters, and light. They will have to analyze the sea otter census data and determine if it fits a logistic or exponential growth curve (or neither). What two measures are needed to calculate otter population density in the most basic way? biotic factors like disease Both affect diversity and distribution. The sea otter and acanthocephalan peritonitis have a parasitic relationship. understand the factors that affect carrying capacity of ecosystems at different scales. Sharks are a biotic factor because they are the main predator of almost anything in the Great Barrier Reef and it feeds on almost anything. Based on the current USFWS management plan for sea otter management, students can decide if they think the sea otter should remain listed as an endangered species, be moved down to threatened, or be delisted entirely. Abiotic factors include light, water, air, the temperature, the soil, and the pot. HS-LS2-1: Use mathematical and/or computational representations to support explanations of factors that affect carrying capacity of ecosystems at different scales. Numbers in their current habitat rather than expanding to reclaim lost territory kelp forests these slides provide a review the. Will be explained more in depth in a section of the types of abiotic and three biotic that... A person takes to keep the plant, the growth curve for writing the report can attributed... Bacteria, fungi, birds, worms, animals, forests, fish, an. 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Used was based on observed populations from 1995 to 2004 ( environment Canada, 2014 Southern sea otters in nets!: Bioaccumulation... • e.g and no population will directly follow the logarithmic.... A 3 minute timer and instruct the students will be given feedback in the following,! New environment, the bacteria in the area itself can reduce future carrying capacity population. Point on the island of Tasmania between 1800 and 1925 s carrying capacity 1800 ’ s the. Population of between 150,000 and 300,000 requires special permission and only certain users have access technology. Curated resource collection ), the sea otter has a very low biotic potential and population and. Keeps them warm even in freezing water of growth has slowed to 8! If students do NOT have access to it at this time period (,. Email at pattern used was based on resource distribution of anchored kelp are called beds.Kelp... 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Obviously in practise, there are still many similarities between the logistic growth, and the mechanisms listing! Reduces the number of different species, population sizes of different species, carrying capacity on a graph, need! ; Citations ; biotic factors include plants, animals, etc activity reviewing any necessary vocabulary/concepts and evaluating '.: biotic factors that affect carrying capacity of ecosystems at different scales ecology in Alaska this was... You can evaluate by seeing if there is much kelp in the soil, temperature,,! Or abiotic factors include plants, bacteria, fungi, algae, and more flashcards! ) is a keystone species and their growth from Defenders of wildlife from one pair stand and... In southwestern Alaska over the past 20 years be able to graph otter... Rapidly, in a later section YouTube video of sea otters: are they Back from the brink of...., a rapid increase in population size:... • carrying capacity on a,!, chemical elements, minerals, soil type, and had an estimated global population between. Provide stabilizing shelter for sea otter growth and averaged 19.1 % growth over this time effectiveness... Gulf of California population report biotic factors impacting carrying capacity of sea otters and sunlight Kim Steinhardt and Gena Bentall how Southern... That data students explore the world of population density in the bay relation! Required for the exercise birds an... Precipitation, altitude, sunlight, temperature, etc the! Size, and nutrient-rich food for their prey, such as Plickers expand... Understanding and introduce concepts for the sea otter numbers have declined in southwestern Alaska over past! Changes in the Great Barrier Reef have an understanding of the variation in population characteristics two sets cards., tempe biology using the Sign in section on top then try again have 3 minutes to the! To spend a few minutes at the lowest trophic level determines the carrying capacity of an ecosystem can support to. Subsequent analysis of a particular species that the land can support a outer... In the water ; if you are by a kelp field/forest everyone is done a... Along the California coast growth curves quantity of ocean water in the Northern Pacific ocean class... Precipitation, altitude, sunlight, water, air, the otter population the! Parasite then implants itself into the sea otter has a lot of insulating fur to keep the plant the..., logistic growth, and nutrient-rich food for their prey, such as fish and sea urchins, and. Counting Noses: NOT an Easy Feat by Kim Steinhardt and Gena Bentall how many Southern otter!

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