• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Document
Document

... size that an environment can support  This model predicts that a population’s growth rate will be small when the population size is either small or large, and highest when the population is at an intermediate level relative to the carrying capacity. ...
Syllabus Matrix - Moors for the Future
Syllabus Matrix - Moors for the Future

... cover and frequency as measures of abundance. The use of mark–release– recapture for more mobile species. 3.6.3 Spearman’s rank: Construct an appropriate null hypothesis. Interpret the calculated test statistic in terms of the appropriate critical value at the 5% significance level, making reference ...
Three Key Features of Populations Size
Three Key Features of Populations Size

... • Doubled three times in the last three centuries • About 6.1 billion and may reach 9.3 billion by the year 2050 • Improved health and technology have lowered death rates ...
Unit 9 Ecosystems Ch 8 Lessons 1 and 2
Unit 9 Ecosystems Ch 8 Lessons 1 and 2

... • A habitat provides the things an organism needs to live, grow and reproduce. ...
Student
Student

... ______________________ than in the country because food is ______________________ to find. Other factors also affect ________________________, such as the ________________________, the presence of predators, parasites and disease as well as ________________________ of natural or human origin. c) The ...
Chapter 5 Biodiversity,Species Interactions2009
Chapter 5 Biodiversity,Species Interactions2009

... Size – number of individuals Density – number of individuals in a certain space Distribution – spatial pattern – clumping,uniform dispersion, random dispersion Age distribution structure - percentage of individuals in each age group uniform Clumping random ...
ra_bmms_lereview1key
ra_bmms_lereview1key

... Explain why grey squirrels moving into a forest already occupied by grey squirrelsis cause intraspecific competition. The new grey squirrels will have to find food an shelter in the forest. They will be using the same resources as the original squirrels. Because the resources are limited, the squirr ...
File - BIO271: Field Ecology at Fontbonne, Spring 2014
File - BIO271: Field Ecology at Fontbonne, Spring 2014

... Niche – all of the factors necessary for a species’ existence – when, where, and how a species lives. Niche influences growth, survival, and reproduction of a species Fundamental niche – hypothetical, theoretical niche. Includes the values of all environmental factors permitting a species to survive ...
Chp 14 Ecosystems
Chp 14 Ecosystems

... • Survivorship curves can be type I, II or III. – Type I—low level of infant mortality and an older population – common to large mammals and humans – Type II—survivorship rate is equal at all stages of life – common to birds and reptiles – Type III—very high birth rate, very high infant mortality – ...
Learning Center Topic: Exotic Species
Learning Center Topic: Exotic Species

... 4. Internet Access ...
FL-HS eMammal Activity 3
FL-HS eMammal Activity 3

... Then, as class come up with two research questions using species richness (and/or Shannon/Simpson Indices) and habitat type [i.e. direct them towards some variation of What is the difference in species richness by habitat type? And what is the difference in species diversity by habitat type?]. Assig ...
Integrating Biological Diversity and Resource Management
Integrating Biological Diversity and Resource Management

... the variety and variability among livIng organismsand the ecologicalcomplexesin which they occur"(p. 5). No matter how well stated, technical definitions rarely make good operatlonal definitions. From a practical viewpoint,it is usefulto considerthree elements of diversity--genetic, species, and eco ...
Populations
Populations

... a. interspecific competition b. intraspecific competition 4. How might overcrowding lead to a reduction in population size? 5. THINKING CRITICALLY – How might an increase in the population of plants in an area lea to an increase in the population of ...
Ch. 10 - Population Dynamics, Carrying Capacity, and Conservation
Ch. 10 - Population Dynamics, Carrying Capacity, and Conservation

... Life table - a table showing the number of individuals at each age (used by insurance companies) Conservation Biology Deals with problems in maintaining the earth's biodiversity: its goals are to investigate human impacts on biodiversity and to develop practical approaches to maintaining biodiversi ...
Final Examination What is a Community?
Final Examination What is a Community?

... 2. Every species in the community has its own niche, defined as the sum of all activities and relationships in which its individuals engage as they secure and use the resources required for their survival and reproduction. ...
Bright blue marble spinning in space
Bright blue marble spinning in space

... ecosystem biosphere ...
Habitats PPT
Habitats PPT

... The shape, height, density, location, and diversity of a habitat’s plant life. The combination of these factors create… ...
Primary Succession
Primary Succession

... The movement from high birth and high death rate to low death rate then lower birth rate ...
Ecology Biomes - Peterson Science
Ecology Biomes - Peterson Science

... all the members of one species in a particular area all the different populations that live together in an area the study of how living things interact with each other and their environment the number of individuals in a specific area moving in to a population leaving a population an environmental f ...
Population Ecology
Population Ecology

... coming) Carrying Capacity of a Habitat Average age of a species and its survivorship curve Dispersion of a species and their resources ...
ecology - Newton County Schools
ecology - Newton County Schools

... conversions in an ecosystem (producers are on the bottom, higher trophic levels are on the top) ...
Introduction to Ecology
Introduction to Ecology

... • What are some PA animals that need nonfragmented habitats? ...
Basic Ecological Concepts
Basic Ecological Concepts

... • ecosystem - a set of organisms and their environment • an ecological niche - the place and functional classification of organisms in an ecosystem ...
AP Biology - lenzapbio
AP Biology - lenzapbio

... more “full” ecological picture and why? ...
Biodiversity
Biodiversity

... • Common property resources often have restrictions on their use while open-access resources do not. • Cultural traditions of the Native Americans dictated the use of bison herds and prevented the destruction of the species. • When Native Americans lost control of their hunting grounds to nonnative ...
< 1 ... 96 97 98 99 100 101 102 103 104 ... 129 >

Source–sink dynamics

Source–sink dynamics is a theoretical model used by ecologists to describe how variation in habitat quality may affect the population growth or decline of organisms.Since quality is likely to vary among patches of habitat, it is important to consider how a low quality patch might affect a population. In this model, organisms occupy two patches of habitat. One patch, the source, is a high quality habitat that on average allows the population to increase. The second patch, the sink, is very low quality habitat that, on its own, would not be able to support a population. However, if the excess of individuals produced in the source frequently moves to the sink, the sink population can persist indefinitely. Organisms are generally assumed to be able to distinguish between high and low quality habitat, and to prefer high quality habitat. However, ecological trap theory describes the reasons why organisms may actually prefer sink patches over source patches. Finally, the source-sink model implies that some habitat patches may be more important to the long-term survival of the population, and considering the presence of source-sink dynamics will help inform conservation decisions.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report