Grasses are the dominant producers in the prairie ecosystem. Mice eat the grass seeds, snakes eat the mice, and hawks eat the snakes. The mass of a hawk is around 500 grams. In this ecosystem, how many hawks can be supported by 250,000 kilograms of producers? Recall that 1 kilogram is equivalent to 1,000 grams.
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Grasses are the dominant producers in the prairie ecosystem. Mice eat the grass seeds, snakes eat the mice, and hawks eat the snakes.
The mass of a hawk is around 500 grams.
In this ecosystem, how many hawks can be supported by 250,000 kilograms of producers?
Recall that 1 kilogram is equivalent to 1,000 grams.
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- +++ NA b. Macroinvertebrates-invertebrates that you can see without magnification-are indicator species often surveyed when assessing aquatic ecosystems. The following data table and graph represent macroinvertebrates sampled in two different streams, Stream A and Stream B. Using the data, develop a claim about the overall and relative water quality of the streams and support your claim with at least two pieces of evidence for each stream. Claim: Evidence: Total Biomass (g) Macroinvertebrate Species Name Mayfly nymph Caddis fly larva Freshwater shrimp Water louse Bloodworm Sludge worm 120 100 80 60 40 20 0 Pollution Tolerance Intolerant Moderately intolerant Moderately intolerant Moderately tolerant Moderately tolerant Tolerant Total biomass in sample (g) Stream A Stream B 0 0 Macroinvertebrate Biomass Comparison 4 30 70 34 10 2 G Mayfly Caddis fly Freshwater Water Bloodworm Sludge nymph larva shrimp louse worm Stream A Stream B 1 4 45 100A small lake is capable of supporting both bluegill and small-mouth bass. These two bony fish species compete for similar food resources. The carrying capacities of this lake for bluegill (K1) is 1,500 and for small-mouth bass (K2) is 500. After some careful measurement, we find that α (or α12)is 0.5 and that β (or α21) is 0.25. We stock the lake with 250 bluegill and 750 bass. Over time, will both species coexist? If so, approximately how many of each species will be present? If not, which one will be driven to extinction in this lake? Answer this please: 1) What is the numerical value of 'A'? 2) What is the numerical value of 'B'? 3) What is the numerical value of 'C'? 4) What is the numerical value of 'D'? 5) What is the value of N1 at the intersection of the ZNGIs? 6) What is the values of N2 at the intersection of the ZNGIs?Given the information provided in Box F, how much grasshopper (species iv) production can be expected if primary production is 256478 kj.m-2yr-1. Assume that all primary consumers get equal shares of primary production.
- How much daily pasture dry matter (kg DM per day) does a 60kg female sheep (at maintenance) would need to consume to meet the daily energy requirements? A: 0.5 kg DM per day of ryegrass pasture B: 1 kg DM per day of ryegrass pasture. C: 1.5 kg DM per day of ryegrass pasture. D: 2 kg DM per day of ryegrass pasture. E: 2.5 kg DM per day of ryegrass pasture.Write the mathematical formulas and describe the shapes of the resulting graphs to illustrate the difference between 1) exponential and 2) logistic growth. Paragraph ... This is the initial text4) A chicken farm produces about 800 kJ/m' of potential food energy per year. Assume that a human must consume 2400 kJ per day to survive. Although it is an oversimplication to imply that a person could survive by eating only one type of food, calculate the total area of land needed to support the entire student population of your school (n=1800) for one year on a diet of (a) rice ONLY and (b) chicken ONLY. SHOW YOUR WORK ON A SEPARATE SHEET OF One square metre of land that is planted with rice produces about 5200 kJ of energy per year. PAPER! pe here to search
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- A population grows according to the logistic model N = 55 1 + 0.9e−1.4t , where t is measured in years and N is measured in thousands. (a) What is r for this population? per year(b) What is the environmental carrying capacity K? thousand(c) This population is subject to harvesting. What is the optimum yield level? thousandOptional Exercise Barn Owls produce 2 pellets per day. Assume each pellet contains 80g of biomass. Also assume that one 40g vole can cause 50 cents of crop damage to a farm per season. If a Barn Owl family of seven (2 adults and 5 young) lives on a farm for 12 weeks and feeds entirely on voles, how much will the farmer save in crop damages?The table below shows the demand for farmed cereals in different regions of the world in 1984 and 1995 (values expressed as x 10^6 tonnes). (a) Determine which region had the highest percentage increase in demand between 1984 and 1995. (b) describe and explain the significance of the data in the table.