AlnusSalixPicea10080Time since glaciation (years)174060120138The graph shows data of plant species richness as a function of time measured in plots that weredominated by either Alnus (black, solid lines), Salix (yellow, dotted line) or Picea (blue, dashedline) (Buma et al. 2019). (FYI: Alnus is alder, Salix is willow, Picea is spruce) Each line describes theaverage change of plant species richness through time in those plots. For each of the dominantspecies in those plots, determine whether they facilitate, inhibit or have no effect onspecies richness in late successional stages.Alnus[ Select ]Salix [ Select ]Picea[ Select ]Plant species richness in plots

Often organisms evolve as time moves on. It is evident from Earth's major phenomena like glaciation,…

Answered: Alnus Salix Picea 100 80 Time since…

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter33: The Plant Body

Section: Chapter Questions

Problem 1ITD

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上午11:08 1月22日周六 * 100% •.. Low High Population Density Site A Site B Unfragmented Fragmented 85. The graph above shows how seed production in a plant species varied with population density in an unfrag- mented habitat (site A) and in a fragmented habitat (site B). Which of the following conclusions is best supported by the data? (A) There is no relationship between seed production and habitat fragmentation. (B) Seed production is higher in dense populations. (C) Seed production is lower in dense populations. (D) Habitat fragmentation has more effect on seed production than does population density. (E) Pollinators are either less abundant or less effective in small populations. Seed Production
11 Scientists have studied the return of plant life on Mount St. Helens ever since the volcano erupted in 1980. Wildflowers began colonizing the area, followed by shrubs and small trees. Scientists predict that it will likely take hundreds of years before the area returns to a forest dominated by fir and hemlock trees. These changes are an example of (1) humans degrading an ecosystem by remov- ing wildflowers (2) the loss of genetic variation in a plant species (3) the growth of a forest through ecological succession (4) the biological evolution of wildflowers, shrubs, and trees
Figure 47.6 Scientists measured the relative abundance ot fern spores above and below the K-Pg boundary in this reck sample. Which of the following statements most likely represents their findings? An abundance of fern spores from several species was found below the K-Pg boundary, but none was found above. An abundance of fern spores from several species was found above the K-Pg boundary, but none was found below. An abundance of fern spores was found both above and below the K-Pg boundary, but only one species was found below the boundary , and many species were found above the boundary. Many species of fern spores were found both above and below the boundary, but the total number of spores was greater below the boundary.
P Parchment Exchange - Leader X + edgenuity.com/Player/ SC5181 A 7 11 13 14 15 17 Unmark this question O Burning large areas of the knotweed O Introducing another plant to compete with the knotweed O Spraying large areas of the knotweed with herbicides Engaging animals to eat the knotweed 19 20 ▸ U O PART Save and Exit The rapidly growing Japanese knotweed plant has a wide range of growth in North America. This plant is an invasive species that outcompetes native plants for area and sunlight. What would best help control mature growth of this invasive plant in an environmentally responsible way? O Next G ← English Sign out V Submit Oct 27 19 ☐ Kinley Heath ⠀ E ▸ 10:29 A
Tundra Enlarge Image Taiga A biome is large regional area of similar communities characterized by a dominant plant type and vegetative structure. Traditionally, biomes have been used to describe large geographical regions such as deserts, grasslands, forests, and tundras. The tundra occurs between the taiga and the permanently frozen polar regions while the taiga zone occupies a wide belt between the tundra and the temperate forests on the American and Eurasian continents. The plant and animal populations vary in these two biomes. 4 O Search 1) Review the images of the two biomes, the tundra and the taiga. Notice that while there are about 1,700 kinds of plants there are virtually no tree species in the tundra. What are the limiting factors in preventing the immigration of tree species into the tundra? All BUT ONE could apply. --)) A) rocky, poor soil B) () D) very short growing season the presence of permafrost winters are six months long 2) The taiga is the most extensive biome,…
O Genesis Chart_Guiding quest x O Home - Student Portal S Savvas EasyBridge S Savvas Realize A savvasrealize.com/assignments/viewer/classes/61227fd32e855b44e0a77ded/assignments/ae252b7fd1ai < Exit Interactivity: Comparing Types of Succession Comparing Types Of Succession Decide whether each of the following events would result in primary or secondary succession. 3. A volcano erupts covering land in lava rock: Type text here. 4. Humans clear land for farming: Type text here. 5. A lake dries up, forming a marsh: Type text here. 6. A wind storm builds new sand dunes: Type text here. Check Anawer acer
Ecology CA STUDENT Insert Draw Design Layout References Mailings Home Calibri (Body) 11 - A A Aa v abe X2 x? A A Paste stic Changes in an ecosystem over a long perod of time are shown in the diagram below. Succession in a Plant Community Pines Beeches and Maples Ferns, shrubs and grasses Mosses Soil 10 yrs 50 yrs 100 yrs 200 yrs 300 yrs A В 9. As the process of ecological succession progresses with time, species diversity tends to: A. gradually decrease from colonization to climax community.. B. be limited in early stages and increase over time. C. increase during intermediate stages, then rapidly decrease during the climax community stage. D. be highest in the colonization stages. 752 words English (United States) Focus Pause 14
SCIENTIFIC INQUIRY An ecologist studying desert plantsperformed the following experiment. She staked out twoidentical plots, containing sagebrush plants and small annualwildflowers. She found the same five wildflower species inroughly equal numbers on both plots. She then enclosed oneplot with a fence to keep out kangaroo rats, the most commongrain-eaters of the area. After two years, four of the wildflowerspecies were no longer present in the fenced plot, but onespecies had become much more abundant. The control plothad not changed in species diversity. Using the principles ofcommunity ecology, propose a hypothesis to explain her results.What additional evidence would support your hypothesis?
The two plant communities on the previous slide are from very different parts of the world but look very similar. Which of the following statements is most likely true? The annual temperatures (but not precipitation) are similar. The annual precipitation (but not temperature) is aimilar Both the annual temperatures and precipitation are aimilar None of the above is likely to be true.
During the past 15 years, white-tailed deer populations in Canada have significantly affected woody plants in forest ecosystems. (a) To estimate white-tailed deer populations in four tracts of the Carolinian forest in southern Ontario, 185 white-tailed deer were captured and tagged with bands. After three weeks, 147 deer were recaptured and 26 had bands. Estimate the population size and show your calculations. (b) To further understand the impact of the deer populations on the woody plants, you decide to study the number of birch trees in an area 100 ha x 100 ha. Using a quadrate measuring 2 ha x 2 ha, you obtain the following results from four random counts: 16, 32, 27, and 11. Calculate the average population density and estimate the total population size of birch trees in the area. (c) Justify the decision to use the mark-recapture method for estimating the deer population size and the quadrat sampling method for the birch tree population.
The above figure compares decomposition rates between three types of conifers. Based on the figure, is the rate of decomposition fastest for pine, spruce, or fir? Pine Spruce O Fir O It is impossible to determine from the information given.
What does this graph tell us about plant species diversity and latitude? Closer to the poles, diversity decreases. Species diversity does not vary with latitude. Closer to the poles, diversity increases. Nothing.

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