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Ecology
Ecology

... • Population growth models – Limits to exponential growth • Population Density (the number of individuals per unit of land area or water volume) increases as well • Competition follows as nutrients and resources are used up • The limit to population size that a particular environment can support is ...
AVIAN HABITAT FRAGMENTATION
AVIAN HABITAT FRAGMENTATION

... INVASIVE SPECIES HABITAT GAIN ...
Ecology - Foothill Technology High School
Ecology - Foothill Technology High School

... • Population growth models – Limits to exponential growth • Population Density (the number of individuals per unit of land area or water volume) increases as well • Competition follows as nutrients and resources are used up • The limit to population size that a particular environment can support is ...
Ecology Notes 3
Ecology Notes 3

... • Population growth models – Limits to exponential growth • Population Density (the number of individuals per unit of land area or water volume) increases as well • Competition follows as nutrients and resources are used up • The limit to population size that a particular environment can support is ...
Chapter 1
Chapter 1

... flexibility in habitat use on their winter grounds, occupying a wider range of habitat types and employing a higher diversity of foraging techniques, even profiting from anthropogenic habitat alteration (Moreau 1972, Morel & Morel 1992, Jones et al. 1996, Wilson & Cresswell 2002). Evidence suggests t ...
limiting factor - Eaton Community Schools
limiting factor - Eaton Community Schools

... regulation of a population by predation takes place within a predatorprey relationship, one of the best-known mechanisms of population control. ...
shared and unique features of diversification in greater antillean
shared and unique features of diversification in greater antillean

... Abstract. Examples of convergent evolution suggest that natural selection can often produce predictable evolutionary outcomes. However, unique histories among species can lead to divergent evolution regardless of their shared selective pressures—and some contend that such historical contingencies pr ...
Matters of National Environmental Significance
Matters of National Environmental Significance

... The Kimberley region is subject to frequent burning, which has increased in intensity in recent years; either as a result of natural or deliberate events (Section 4.2.11). Controlled burning conducted as part of pastoral activities will not be conducted on the same frequency or extent within the Min ...
A Survey and Overview of Habitat Fragmentation Experiments
A Survey and Overview of Habitat Fragmentation Experiments

... Following from the theory of island biogeography (MacArthur & Wilson 1967), species richness in habitat fragments is expected to be a function of island size and degree of isolation. Smaller, more isolated fragments are expected to retain fewer species than larger, less isolated habitat tracts (Diam ...
Habitat Fragmentation Effects on Trophic Processes of
Habitat Fragmentation Effects on Trophic Processes of

... herbivory and leafminer parasitism rates decreased with remnant area. Lower herbivore species richness and abundance are frequently associated with increasing habitat fragmentation (e.g., Kruess & Tscharntke 2000a; Hunter 2002), but despite the well-known impact of insect herbivores, effects of frag ...
Viability of an endangered population of ortolan buntings: The effect
Viability of an endangered population of ortolan buntings: The effect

... (1–3 days interval) to all habitat patches which have been used by ortolan buntings. In addition, all other potentially suitable habitat patches within the study area were visited frequently. Because females behave cryptically throughout most of the breeding season and do not aggressively respond to ...
Ecography 000: 000000, 2009 doi: 10.1111/j.1600-0587.2009.05857.x
Ecography 000: 000000, 2009 doi: 10.1111/j.1600-0587.2009.05857.x

... americana. Like many other grassland birds in North America, dickcissels have undergone significant population declines and are of conservation concern (Rich et al. 2004). High priority research needs for dickcissel conservation include information on nest predators and information on how landscape ...
Full text in pdf format
Full text in pdf format

... Department of Systems Ecology, Stockholm University, 106 91 Stockholm, Sweden ...
WGCP PIF Plan (2003 Revised Draft)
WGCP PIF Plan (2003 Revised Draft)

... is currently the dominant in both the bottomland hardwood and in the oak/hickory forest remaining in the WGCP of Louisiana. Somebody please write a similar paragraph for Oklahoma The Ouachita Mountains extend into Oklahoma. Most of the oak/pine forest in southeast Oklahoma have been converted to sho ...
Presentation
Presentation

... • Population growth models – Limits to exponential growth • Population Density (the number of individuals per unit of land area or water volume) increases as well • Competition follows as nutrients and resources are used up • The limit to population size that a particular environment can support is ...
Unit 2 - OpenWetWare
Unit 2 - OpenWetWare

... 15. Explain how organisms interact in a community through competition, predation, and symbiosis (mutualism, commensalism, and parasitism). 16. Explain how the introduction of exotic/invasive species (p153) into an unoccupied habitat can affect that area. 17. Describe the stages of primary succession ...
What do we mean when we talk about ecological restoration?
What do we mean when we talk about ecological restoration?

... and/or their habitats that have been extinguished or diminished. Ideally the restoration will return normal ecosystem function to an area and hopefully the project will also have social or economic value to humans Restoration Ecology is the study of restoration; ER is the process of restoration ...
Mathematical Challenges in Spatial Ecology, Volume 48, Number 11
Mathematical Challenges in Spatial Ecology, Volume 48, Number 11

... set or an infinite but countable set. (A Markov process is a stochastic process in which the future state depends only on the current state and the past becomes irrelevant.) The temporal evolution is given by rate functions that allow the process to evolve in continuous time. The contact process des ...
Population Ecology_AP Bio
Population Ecology_AP Bio

... Birds nesting on small islands, such as these king penguins on South Georgia Island in the South Atlantic Ocean, often exhibit uniform spacing, maintained by aggressive interactions between neighbors. ...
Long-billed Curlew (Numenius americanus)
Long-billed Curlew (Numenius americanus)

... was also evident for Saskatchewan and Alberta, but not for British Columbia, which showed nonsignificant increases. The only current trend information for the Long-billed Curlew in Canada comes from the Breeding Bird Survey. Over the most recent 10-year period (1999–2009), BBS data showed a non-sign ...
A model for evaluating the `habitat potential` of a landscape for
A model for evaluating the `habitat potential` of a landscape for

... Braunisch, V. & Suchant, R. 2007: A model for evaluating the 'habitat potential' of a landscape for capercaillie Tetrao urogallus: a tool for conservation planning. - Wildl. Biol. 13 (Suppl. 1): 21-33. Most habitat models developed for defining priority conservation sites target areas currently exhi ...
Similarities in perceived predation risk prevent temporal partitioning
Similarities in perceived predation risk prevent temporal partitioning

... for food. This was because their use of the different microhabitats (e.g., under and away from boulders) varied as did their feeding effort within the microhabitats. However, in summer, when snakes were active, both species of spiny mice fed more in open areas away from boulders to avoid snakes. As ...
What Limits Your Species
What Limits Your Species

... disease, predation and parasites, poor reproductive success and damage to the habitat. For example, multiplying river otters can very quickly eat all the fish in a stream. With the fish gone, food becomes the limiting factor and the river otters may starve or move to another area. The stream now has ...
Environmental Law Cheat Sheet
Environmental Law Cheat Sheet

... - Agency inaction is outside scope of NEPA - 3 main issue are: 1) whether EIS is required (EA): Has there been a proposal (which was more specifically defined post-Kleppe)? Note: EIS can consider social/econ. factors but they aren’t enough to require and EIS – must effect physical/natural enviro. 2 ...
Influences of habitat structure, climate, disturbances and predation
Influences of habitat structure, climate, disturbances and predation

... Based on the available results, a considerable influence on the development of Black Grouse populations must actually be ascribed to the impact of weather, although a statistical assessment, using daily data of minimum temperature, precipitation and height of snow cover during the winter season poin ...
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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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