/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} 4 (a) In the field, S. patens is t... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 52: 4 (page 1184)

(a) In the field, S. patens is typically absent from freshwater marshes. Based on the data, does this appear to be due to salinity or competition? Explain your answer. (b) T. angustifolia does not grow in salt marshes. Does this appear to be due to salinity or competition? Explain your answer.

Short Answer

Expert verified
  1. As it can thrive at zero salinity in experimental freshwater marshes without competitive neighbors but has decreased biomass in the presence of neighbors, S. patensare often missing from wild freshwater wetlands.
  2. Due to salinity, T. angustifolia doesnot grow in natural salt marshes; it also does not grow in experimental salt marshes, even when there are no competing species. It does not grow in a greenhouse with greater salinity levels.

Step by step solution

01

About the experiment

Salinity and competition affect plant distribution in an estuary is an experiment on S. patens and T. angustifolia.Observations on the ground indicate that Spartina patens (salt marsh hay) are the dominant plant in salt marshes, while Typha angustifolia (cattail) is prevalent in freshwater marshes.

02

Explanation for ‘a’ 

Originally from North America's east and Gulf coasts, saltmeadow cordgrass(S.patens) has been introduced to the west coast.It is a climax species of salt marshes, specifically the zone to the seaward of the high-water line, in the high marsh environment.

03

Explanation for ‘b’ 

There are numerous channels of natural drainage and irrigation, reservoirs and ponds, navigation canals, and natural freshwater and wetlands that support T. angustifolia. Due to its clonal growth pattern and great competitive ability, it tends to develop monodominant stands in ideal conditions for growth.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Which of the following is characteristic of most terrestrial biomes?

(A) a distribution predicted almost entirely by rock and soil patterns

(B) clear boundaries between adjacent biomes

(C) vegetation demonstrating vertical layering

(D) cold winter months

Suppose that the number of bird species is determined mainly by the number of vertical strata found in the environment. If so, in which of the following biomes would you find the greatest number of bird species?

(A) tropical rain forest

(B) savanna

(C) desert

(D) temperate broadleaf forest

As noted in Figure 52.15, the addition of nutrients to a lake can cause an algal bloom. When these algae die, complex molecules in their bodies are broken down by decomposers using aerobic respiration. Explain why this would reduce the lake's oxygen levels (see Concept 9.1).

Jens Clausen and colleagues, at the Carnegie Institution of Washington, studied how the size of yarrow plants (Achillea lanulosa) growing on the slopes of the Sierra Nevada varied with elevation. They found that plants from low elevations were generally taller than plants from high elevations, as shown in the diagram. Clausen and colleagues proposed two hypotheses to explain this variation within a species: (1) There are genetic differences between populations of plants found at different elevations. (2) The species has developmental flexibility and can assume tall or short growth forms, depending on local abiotic factors. If you had seeds from yarrow plants found at low and high elevations, how would you test these hypotheses?

Give examples of human actions that could expand a species' distribution by changing its (a) dispersal or (b) biotic interactions.

See all solutions

Recommended explanations on Biology Textbooks

Ecological Levels

Read Explanation

Astrobiological Science

Read Explanation

Cellular Energetics

Read Explanation

Plant Biology

Read Explanation

Bioenergetics

Read Explanation

Ecology

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.