Use the simulation to determine the maximum biomass of foxes that the meadow ecosystem can support. Your predictions Fill in the table below for your predictions about the initial settings that will lead to the highest possible fox, rabbit, and grass biomass after 100 years. Initial Settings (kg/m²) 100 Years Later Foxes Biomass Rabbits Biomass Grass Biomass

Use the simulation to determine the maximum biomass of foxes that the meadow ecosystem can support. Your predictions Fill in the table below for your predictions about the initial settings that will lead to the highest possible fox, rabbit, and grass biomass after 100 years. Initial Settings (kg/m²) 100 Years Later Foxes Biomass Rabbits Biomass Grass Biomass

Aquaculture Science

3rd Edition

ISBN:9781133558347

Author:Parker

Publisher:Parker

Chapter17: Aquaculture Business

Section: Chapter Questions

Problem 5KA

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The logistic model incorporates carrying capacity to make the model exponential
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? thousand
PoN Background Information: In 1970 the deer population of an island forest reserve about 518 square kilometers in size was about 2000 animals. Although the island had excellent vegetation for feeding, the food supply obviously had limits. Thus, the forest management personnel feared that overgrazing might lead to mass starvation. Since the area was too remote for hunters, the wildlife service decided to bring in natural predators to control the deer population. It was hoped that natural predation would keep the deer population from becoming too large and als increase the deer quality (or health), as predators often eliminate the weaker members of the herd. In 1971, ten wolves were flown into the island. The results of this program are shown in the following graph (below). Deer and Wolf Population Size 2500 2400 30 -28 2300 -26 24 2200 +22 whlf -20 2100 18 -16 2000 14 deer -12 1900 -10 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 Describe what happened to the deer and wolf…
Describe the growth at various parts of the S-shaped curve of logistic growth.
PLEASE ANSWER A AND B As we know, energy is lost moving from one trophic level to the next (total energy moved from one trophic level to the next is usually estimated at 10%). The total loss is known as trophic efficiency. Trophic efficiency is made of 3 parts (3 places where energy is lost). You need to pick TWO of the three individual efficiencies that make up the overall trophic efficiency and for EACH, tell me: a. What do we call this part of trophic efficiency? b. How is energy lost in this part of trophic efficiency? c. We discussed characteristics of an organism or environment that made it more or less efficient in certain parts of trophic efficiency (we did not use this one in class, but for instance, endoparasites have a higher xxxxxxx efficiency than ectoparasites). Tell me what characteristics of an organism/ecosystem (other than the example above) would make it more or less efficient for this part of Trophic efficiency. (Make sure to say what characteristics makes it…
Compare the energy component of your ecological footprint calculated in this way with the 5.9 ha calculated using the method of the Global Footprint Network. Explain why results from the two methods may differ.
Question 11 Explain how and why the percent of consumed Net Primary Productivity (NPP) varies greatly when comparing the consumption of primary producers in lakes, grasslands, and forest. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph Arial 10pt 三v A v P A Moving to another question will save this response.
A fishprint provides a measure of a country’s fish harvestin terms of area. The unit of area used in fishprint analysisis the global hectare (gha), a unit weighted to reflect therelative ecological productivity of the area fished. Whencompared with the fishing area’s sustainable biocapacity (itsability to provide a stable supply of fish year after year,expressed in terms of yield per area), its fishprint indicateswhether the country’s annual fishing harvest is sustainable. The fishprint and biocapacity are calculated using thefollowing formulas:Fishprint in (gha) = metric tons of fish harvestedper year/productivity in metric tons per hectare ×weighting factorBiocapacity in (gha) = sustained yield of fish in metrictons per year/productivity in metric tons per hectare ×weighting factorThe following graph shows the earth’s total fishprint andbiocapacity between 1950 and 2000. Study it and answerthe following questions: If biologists determine that this country’s sustainedyield of fish is…
This conceptual model to the right shows the flow of energy through a spring ecosystem in Silver Springs, Florida from Figure 46.8 in your textbook. 7a. Which value/number on this diagram represents gross primary productivity (GPP)? Express using the units kcal/m?/yr. Sunlight 1,700,000 kcalim?lyr Primary producers 13,187 20,810 7,618 4,250 Primary consumers 7b. Which value/number represents net primary productivity (NPP)? Express using the units kcal/m?/yr. 2,265 3,368 1,103 720 Secondary consumers 272 383 111 90 7c. What accounts for the difference in GPP and NPP? Tertiary consumers 16 21 5 Decomposers 7d. What is the efficiency of energy transfer between the primary producers and the primary consumers? Is this more or less efficient than the transfer between a 5,060 5,060 Total heat and respiration 20,810 secondary consumer and tertiary consumer? Explain. respiration + heat to decomposers
This conceptual model to the right shows the flow of energy through a spring ecosystem in Silver Springs, Florida from Figure 46.8 in your textbook. 7a. Which value/number on this diagram represents gross primary productivity (GPP)? Express using the units kcal/m?/yr. Sunlight 1,700,000 kcal/m?lyr Primary producers 13,187 20,810 7,618 4,250 Primary consumers 7b. Which value/number represents net primary productivity (NPP)? Express using the units kcal/m²/yr. 2,265 3,368 1,103 720 Secondary consumers 272 383 111 90 7c. What accounts for the difference in GPP and NPP? Tertiary consumers 16 21 Decomposers 7d. What is the efficiency of energy transfer between the primary producers and the primary consumers? Is this more or less efficient than the transfer between a secondary consumer and tertiary consumer? Explain. 5,060 5,060 Total heat and respiration 20,810 respiration + heat to decomposers
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The Jena experiment tested the effects of plant species richness on the ecosystem function of various grassland areas over a 15-year timespan. Ecosystem function was determined by measuring the biomass, soil characteristics, types, and numbers of producers and consumers in the area, and tested to determine the strength of the biodiversity effect on the ecosystem. The graphs show the ecosystem function at the onset of the experiment (dotted line) versus the ecosystem function at the end of the 15-year experiment (solid line) in four different test sites (A, B, C, and D).