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INTRODUCTION
INTRODUCTION

...  Seeds germinate at safe sites  Seeds not dispersed from parent areas  Asexual reproduction ...
Chapter 6 - Bulldogbiology.com
Chapter 6 - Bulldogbiology.com

...  Population age structure is dispersion of how many individuals fall in certain age groups. Most important is how many individuals fall in reproduction age ...
Population Dynamics - Amazing World of Science with Mr. Green
Population Dynamics - Amazing World of Science with Mr. Green

... Specialized niche Inadequate food supply Unsuitable or destroyed habitat Too many competitors Insufficient ability to hide from or defend against predators Inability to resist diseases and parasites Inability to migrate and live in other habitats Inability to adapt to environmental change ...
OPEN MOSAIC HABITATS ON PREVIOUSLY DEVELOPED LAND
OPEN MOSAIC HABITATS ON PREVIOUSLY DEVELOPED LAND

... dioica, common ragwort Senecio jacobaea and bramble Rubus fruticsosus can become dominant on some OMHPDL sites but these can often be important for a range of invertebrate species and are an important element of the overall habitat mosaic. Pools (including temporary ones), ditches and associated pat ...
Population Growth
Population Growth

... •Insects, annual plants and algae are examples – take advantage of favorable conditions in the summer – reproduce exponentially, but die at the end of the season. ...
Disturbance Stable States
Disturbance Stable States

... – Schizoporella dominated when fish predators were common (fish eat Styela recruits) – Styela dominated when few fish were present, Tubularia and Bugula were present (Styela recruits hide under these species ...
Relative abundance I: commonness and rarity
Relative abundance I: commonness and rarity

... Pseudo-rarity • Global scale is not the only scale at which populations are managed: ...
Camp Shelby Conservation Programs
Camp Shelby Conservation Programs

... The Nature Conservancy in Mississippi ...
Populations
Populations

... resource is no longer available for another individual. ...
Population spatial structure, human
Population spatial structure, human

... and rescue of local populations. which further reduces overall population size. Eventually local extinctions can accumulate to regional extinctions. Habitat fragmentation per se exacerbates this problem by increasing the probability of local extinction. However. the effects of habitat loss far outwe ...
wfsc420 lesson04
wfsc420 lesson04

... Overabundant herbivore population devastated natural vegetation (see Fig. 411 in text). Using disease as control measure – why will this procedure fail in the long term? ...
Dunmall`s snake.indd
Dunmall`s snake.indd

... on fertile soils to the eucalypt woodlands on poorer soils. Consequently the survival of dry woodland/open forest species with limited geographic ranges and/or specialised habitat requirements, such as the Dunmall’s snake, remain uncertain unless conservation action is undertaken. ...
Ecology - AaronFreeman
Ecology - AaronFreeman

... needs to survive and reproduce are part of it’s niche Ex Fungi= break down of organic matter Coyotes= keep rodents down ...
Ch4 Revision - Population Ecology
Ch4 Revision - Population Ecology

... This chapter covers Ecology and, as such, has a vocabulary all its own – which is often examined. Environment: All the organisms (biotic) and the conditions (abiotic) which exist in an area Abiotic factors: all the non-living factors in an environment, such as rainfall, temperature, soil. Biotic fac ...
Appendix 3- Likely Significant Effects_Final
Appendix 3- Likely Significant Effects_Final

... The Decision Tree of the risk-based approach attempts to address the main likely significant effects in relation to the type and location of the development (i.e. distance from important bird areas). Please note, that there may be additional, combined effects that require consideration, depending on ...
Response to External Factors
Response to External Factors

...  Living (Biotic) factors all plants & animals living in an area  Physical (Abiotic) factors soil, rock, temperature, moisture, sunlight Populations  Organisms do not generally live alone. A population is a group of organisms from the same species occupying in the same geographical area. This area ...
Ecology Notes 4-2
Ecology Notes 4-2

... environment. Ex. Trees, birds, bacteria, etc.  Abiotic factors – non living factors in an environment. Ex. Temp., rainfall, humidity, soil. ...
PowerPoint - New Mexico State University
PowerPoint - New Mexico State University

... the process where lower level plants are consumed by higher-level animals, which eventually die and return to the soil as nutrients that are utilized by plants.  The food needs of an animal change as it ...
Populations Dynamics
Populations Dynamics

... factors (water condition, air quality, salinity, temperature, soil content, etc.) Biotic factors – living organisms that interact with the organism we are studying (prey, predators, infectious agents etc.) ...
HSLS2-2
HSLS2-2

... HSS-ID.A.1 HSS-IC.A.1 HSS-IC.B.6 ...
Guidance for Conservation
Guidance for Conservation

... • Predation by skunks, raccoons, foxes and feral cats. Management Recommendations The Whip-poor-will requires forest habitat with open areas. Managing forest habitats to create the openings needed by Whip-poor-wills can be done by forest management or fire. Unfortunately, there are few data to deter ...
Ch54_Lecture Populations wiki
Ch54_Lecture Populations wiki

... • 54.2 How Do Ecological Conditions Affect Life Histories? • 54.3 What Factors Influence Population ...
Interactions: Environment and Organism
Interactions: Environment and Organism

... have a greater chance of obtaining needed resources and, therefore, have a greater likelihood of surviving and reproducing than others. As time passes and each generation is subjected to the same process of natural selection, the percentage of individuals showing favorable variations will increase a ...
Distribution patterns - SOEST
Distribution patterns - SOEST

...   Where it lives, what food it eats, what animals eat it ...
Chapter 5
Chapter 5

... Levels of ecological organization Population characteristics that predict growth Population ecology Conservation challenges ...
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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.
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