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K 1
K 1

... coexistence under the assumptions of the model E.g., the product αβ must be < 1 for N to be > 0 for both species (a necessary condition for coexistence) But they do not provide much insight into the dynamics of competitive interactions, e.g., are the equilibrium points stable? ...
Final notes on populations and communities.
Final notes on populations and communities.

... close association with each other (often one species lives on/in the host species) a. mutualism: both species benefit from the relationship (+,+) i. the clownfish and the sea anemone: the clownfish eats scraps from the sea anemone and keeps it clean while the sea anemone provides protection from pre ...
Slide 1
Slide 1

... coexistence under the assumptions of the model E.g., the product αβ must be < 1 for N to be > 0 for both species (a necessary condition for coexistence) But they do not provide much insight into the dynamics of competitive interactions, e.g., are the equilibrium points stable? ...
Slide 1
Slide 1

... • Triggers classically studied as either temperature or lighting variations • Suggest relationship to large-scale global climate phenomena – Ex. North Atlantic Oscillation (NAO) – Huppop and Huppop (2003) ...
Relating Foraging Behavior to Wildlife Management
Relating Foraging Behavior to Wildlife Management

...  Demographic Stochasticity – By chance alone population fluctuates in growth rate and hence change in size from one year to the next – When population is small, extinction can occur with relatively high probability even if chances of survival and successful reproduction are high ...
Ecology_Habitat Mgmt Deer Mice, Pocket Gophers
Ecology_Habitat Mgmt Deer Mice, Pocket Gophers

... • Secondary prey species – restricted range (northern) and habitat (both species) overlap with spotted owls ...
Topic 1
Topic 1

... eat too much foliage. – The deer and other herbivore populations would starve. ...
Chap 5 14e
Chap 5 14e

... benefits and the other is not harmed • Commensalism is an interaction that benefits one species but has little, if any, beneficial or harmful effect on the other. • Epiphytes are plants that attach themselves to the trunks or branches of large trees for access to sunlight; these ...
Guia dos Sphingidae da Serra dos Órgãos, sudeste do
Guia dos Sphingidae da Serra dos Órgãos, sudeste do

... hampered by the lack of affordable regional guides for many areas within South America or tropical Africa. This new guide covers 110 Sphingidae species recorded thus far from a rather small subarea of the state of Rio de Janeiro in south-eastern Brazil. The study region harbours substantial remnants ...
Chapter 1 Notes - Social Circle City Schools
Chapter 1 Notes - Social Circle City Schools

... What is a Community? A __________ is any assemblage of populations in an area or habitat. Communities differ dramatically in their species richness and relative abundance. - _______________: number of species contained - ____________________: number of different species ...
chapter 5 learning objectives
chapter 5 learning objectives

... 1.1.2. Describe how mutations occur and how they can affect offspring. 1.1.3. Define genotype and phenotype and give one example of each. Are phenotypes only determined by an organism’s genes? 1.1.4. Define and describe examples of evolution by artificial selection (examples to know: dog domesticati ...
Background chloroplasts, could prove effective in tracking changes in size
Background chloroplasts, could prove effective in tracking changes in size

... specimens becomes truly a strong argument. While some life cycle information occurs in reports of blooms or cultures, there has been no concerted effort to define the life cycle stages of the different raphidophytes. Given their increasing importance as HAB species, there is a need to re-examine the ...
Relating Foraging Behavior to Wildlife Management
Relating Foraging Behavior to Wildlife Management

... Why are Rare Species Prone to Extinction?  Demographic Stochasticity – By chance alone population fluctuates in growth rate and hence change in size from one year to the next – When population is small, extinction can occur with relatively high probability even if chances of survival and successfu ...
1 - biologywithsteiner
1 - biologywithsteiner

...  Parasitism – one species benefits, the other is harmed Part 1 Look at each relationship that is described. Determine if the relationship is one of mutualism, commensalism or parasitism. Using complete sentences, explain your reason for each answer. 1. Paramecium bursaria is a unicellular protist t ...
Chapter 10: Biodiversity Section 1, What is Biodiversity? A World
Chapter 10: Biodiversity Section 1, What is Biodiversity? A World

... The extinction of many species in a relatively short period of time is called a __________________________________________________. ...
Extinction and Vulnerability to Extinction
Extinction and Vulnerability to Extinction

... • For example, 100 birds and mammals have gone extinct between 1900-2000 • Hence, 15,333 species of birds and mammals – 0.65 % loss per century or 1 bird or mammal species per year • Compared with the historical record for birds and mammals – 0.0003 species per year • Hence, 333 times greater than b ...
Chapter 22-Sustaining Wild Species
Chapter 22-Sustaining Wild Species

... 22.2 Three Types of Extinction A. Local Extinction: Species is no longer found in an area it once was, but it is found in other areas. Ex. White tail deer was near a local extinction but has recovered to a ...
Biodiversity, Species Interactions, and Population Control Chapter 5
Biodiversity, Species Interactions, and Population Control Chapter 5

... Two or more distasteful species, that may or may not be closely related and share one or more common predators, have come to mimic each other's warning signals. The predator learns to avoid all creatures that share these traits. ...
Community measurement
Community measurement

... Plot the dominant species with point for each stand (Imp. Value on Y axis; Cont. Index on X) ...
Abiotic A`s File - Learning on the Loop
Abiotic A`s File - Learning on the Loop

... Plant responses and Animal behaviour Lesson one - answers The Environment: Abiotic and biotic factors For an organism to grow, survive and reproduce they have to be able to take advantage of changes in their environments. Its habitat, where an organism lives does not change, but the environment can ...
Understanding populations
Understanding populations

... • Density dependent: when deaths of population members are more common in a crowded population than in a sparse population. EXAMPLES? • Density independent: when deaths are equally likely in a crowded or sparse population. EXAMPLES? ...
rivercenter.uga.edu
rivercenter.uga.edu

... • Stable environments facilitate narrow niches, hence more species packing (rainforests and deep ocean??) • Speciation following dispersal barriers • Speciation following major extinctions ...
Animal Ecology - Matthew Bolek
Animal Ecology - Matthew Bolek

... Environment and Niche • Environment: includes the abiotic (nonliving) factors, and biotic (living) factors. • Niche: a multi dimensional relationship of species with its environment. – Fundamental niche: is the potential niche – Realized niche: the subset of potentially suitable environments that a ...
What factors affect population growth
What factors affect population growth

...  Interactions (intraspecific and interspecific)  Characteristics inherent within the individual  Not how an individual responds, but how an individual lives  Life-history Importance of density  Some factors that regulate population sizes are directly related to density  In other words, as dens ...
Community Ecology
Community Ecology

... could potentially survive and reproduce ‘potential niche’ • Some species have a broad fundamental niche • Some species have a narrow fundamental niche ...
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Occupancy–abundance relationship

In ecology, the occupancy–abundance (O–A) relationship is the relationship between the abundance of species and the size of their ranges within a region. This relationship is perhaps one of the most well-documented relationships in macroecology, and applies both intra- and interspecifically (within and among species). In most cases, the O–A relationship is a positive relationship. Although an O–A relationship would be expected, given that a species colonizing a region must pass through the origin (zero abundance, zero occupancy) and could reach some theoretical maximum abundance and distribution (that is, occupancy and abundance can be expected to co-vary), the relationship described here is somewhat more substantial, in that observed changes in range are associated with greater-than-proportional changes in abundance. Although this relationship appears to be pervasive (e.g. Gaston 1996 and references therein), and has important implications for the conservation of endangered species, the mechanism(s) underlying it remain poorly understood
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