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Conservation Biology
Chapters 1-10
92
Environmental Studies
Undergraduate 2
02/24/2010

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Term
Terms for species living outside it's native range?
Definition
Exotic, introduced, invasive, non-indigenous, nonnative, alien or adventive.
Term
Invasive species
Definition
an exotic species that has or is likely to successfully invade an ecosystem causing significant ecological, economic or human health problems.
Term
Are most exotic species invasive?
Definition
No
Term
Where does the greatest source of invasive species come from?
Definition
Plankton and planktonic offspring of large species in ballast water of ships.
Term
Reasons for invasive exotics:
Definition
Stowaways, subsistence and commerce, recreation(hunting and fishing),science, biological control (introduce the predator of the invasive species how mongooses came to Hawaii), habitat change (ship canal or agriculture expansion).
Term
what's a problem with hybridization?
Definition
It may be causing species to go extinct before they are even created. aka two groups were different enough that given more isolation they would have developed into different species but now they are being hybridized and changed...
Term
How do invasive exotics impact native areas:
Definition
Predation and grazing, parasites and pathogen introduction, competition for critical resources and hybridization =/.
Term
tens rule
Definition
roughly 1 in ten introduced species will escape into the wild, of those 1 in 10 will become established, of those 1 in 10 will become invasive pests.
Term
what influences an increased success rate for invasion?
Definition
the number of invaders, is it an island, predisposal due to low species richness, is the ecosystem disturbed, is the species from Europe.
Term
allelopathy
Definition
chemical releases to supress neignboring plants.
Term
Conservation biology vs ecology
Definition
Values & tthics science (normative) vs a positive science about organisms and their environment.
Term
Preservationist vs conservationist vs ecologists vs environmentalist
Definition
preserving vs careful use vs studying the relationship between organism and environment vs concern for environmental quality.
Term
John Muir and his philosophy
Definition
Founder of sierra club. Helped create yosemite and sequoia national park. naturalist who got involved in policy and politics.
Term
Gifford Pinchot
Definition
Forester and politician. Founded the U.S. forest service. believe in conservation ethic- sustainable use of our resources.
Term
Aldo Leapold
Definition
Ecologist, forester and conservationist. Founder of wildlife management and restoration ecology as a discipline. went from hunter -> conservationist.
Term
When did conservation biology start?
Definition
1978 first conference, 1980 first book and 1987 conservation biology journal was launched. (last two by wilox and soule)
Term
The Ethical principles of conservation biology:
Definition
diversity of speices and biological communities should be preserved. Untimely extinction should be prevented. Ecological complexity should be maintained and evolution must continue.
Term
Biofilia
Definition
people have an innate need for nature.
Term
6 major forces acting on biodiversity:
Definition
Global population growth, Clear-cutting and deforestation, land conversion, consumption, non-native species and climate change.
Term
US population and growth rate
Definition
308 million and 0.915% growth rate annually.
Term
World population and growth rate
Definition
6.8 million with 1.14% growth rate or about 75-90 million a year. about 9000/hr.
Term
Current level of CO2 worldwide and annual world increae:
Definition
387 ppmv with 27 billion tonnes per year being released worldwide by humans.
Term
Population of RI and growth rate
Definition
1 million and possible a growth rate of -.03.
Term
Two components of ecosystem stability:
Definition
Resistance- ability to withstand perturbation and maintain normal function and resilience- ability to recover from disturbance.
Term
resistance vs resilience.
Definition
ability to withstand perturbation and maintain normal function vs ability to recover from disturbance.
Term
dilution effect
Definition
if the host is abundant and available the pathogen will spread quickly, if the host is diluted than the pathogen won't spread as quickly.
Term
Does high biodiversity equal high productivity?
Definition
No salt marshes are not very biodiverse but are highly productive and healthy.
Term
Permaculture
Definition
an approach to designing human settlements and agricultural systems that mimic the relationships found in natural ecologies.
Term
4 dimensions of biodiversity
Definition
genetic, spatial, functional, and temporal. (read more in notes)
Term
biodiversity
Definition
variety of life on earth at all its levels from genes to ecosystems to environmental impacts.
Term
Why is genetic diversity important?
Definition
allows for greater adaption, evolution and ability to survive changes.
Term
what is spatial component important?
Definition
different landscapes and regions have cause the same species to behave very differently with unique adaptions and abilities.
Term
Importance of functional diversity?
Definition
to insure that all functions important to an ecosystem will continue to occur.
Term
Importance of spatial and temporal diversity?
Definition
migration, nesting, different life stages, succession, season diversity, ect.
Term
define genetic diversity
Definition
the variation in the nucleotides, genes, chromosomes, or whole genomes and organisms.
Term
does a greater number of genes correspond to greater organisms complexity?
Definition
No rice has 46 thousand genes while humans only have 35 thousand.
Term
Phenotype
Definition
the physical constitution of an organism that results from its genetic constitution(genotype) and the action of the environment on the expression of genes.
Term
morphology
Definition
subgroup of phenotype focused just on structure (outside and inside appearance).
Term
population (complex definition)
Definition
a group of individuals of the same species that share aspects of their genetics or demography more closely with eachother than with other groups of individuals of that species.
Term
population diversity
Definition
variation in the quantitative and spatial characteristics between populations.
Term
Importance of biogeograhpic barriers:
Definition
Limit organisms movement, cause isolation and cause populations to diversify.
Term
does population size correlate to genetic diversity?
Definition
depends on the number of founders and the type of reproduction the organism uses.
Term
Proportion of total genetic variation within a species due to genetic differences between geographic populations:
Definition
high for species that don't move around easily, lower for birds and marine animals.
Term
What is one of the most overlook tragedy of the biodiversity crisis?
Definition
Population variation loss.
Term
What is the importance of population diversity?
Definition
to ensure that a species can survive crises, disease, climate change, ect.
Term
species richness vs species diversity
Definition
number of species vs species number weighted by measures of importance such as: abundance, productivity or size.
Term
Shannon diversity index:
Definition
H= sum of pi ln(pi) where pi is the proportion of total species of specimen i.
Term
abundance
Definition
measured as individuals or biomass(proxy for resource intake). usually measured as the large number of individuals found per sample.
Term
species richness vs species evenness.
Definition
number of species vs how equally species are represented in terms of abundance.
Term
Different definitions of species:
Definition
Morphology-speciation based on appearance vs biological- seciation based on interbreeding populations vs phylogenetic- smallest diagnosable cluster of organisms with which there is a parental pattern of ancestry.
Term
cyrptic species
Definition
taxonomically they look very similar to each other but genetically they are different species.
Term
When was native phragmities discovered?
Definition
2002, it is cryptic.
Term
taxonomic or phylogenetic diversity
Definition
another way to look a diversity based on how many taxa or phyla are represented by species in your ecosystem. marine ecosystems typically have more phyla but fewer species than terrestrial ecosystems.
Term
community diversity
Definition
variation in the groups of populations and species that share an environment. ( can be community with various populations of the same or different species).
Term
ecosystem diversity
Definition
o the diversity of a place at the level of ecosystems. ecosystem= community + physical environment at certain time. determined by climate, time, species interactions, disasters, ect.
Term
spectral signature
Definition
used to look at dense forest vs scrub vs grass vs water vs degraded forest.
Term
landscape diversity
Definition
variations between landscapes based on the different types of ecosystems they comprise. ecosystems are not islands they are affected by landscape interactions.
Term
ecoregions
Definition
relatively large unit of land or water containing a geographically distinct assemblage of species, natural communities and environmental conditions.
Term
biogeography
Definition
"why are these species here or not?" the study of distribution of biodiversity over space and time. it aims to reveal where organisms live and at what abundance. * might be able to assist in migration due to climate change.
Term
ecotone
Definition
a transition area between two adjacent but different plant communities, such as forest and grassland.
Term
Alpha diversity
Definition
locally or single site. # of species.
Term
Beta diversity
Definition
measures uniqueness between two different sites. only important in context. total species between the 2 areas minus common ones.
Term
Gama diversity
Definition
diversity over a large scale, overall diversity, same concept as alpha with a bigger area.
Term
global diversity gradient:
Definition
species diversity is lowest near the poles and increases towards the tropics reaching a peak in the tropical rainforest (lots of insects).
Term
eastern US has fewer mammal species than western. why?
Definition
more human impact, more developed, geography...
Term
Within a region, vegetation structure is more important than productivity in determining local diversity.
Definition
Term
species pool
Definition
all species within a region. equal to gamma diversity.
Term
adaptive radiation
Definition
a process where species evolve rapidly to exploit empty/vacant niches. often results in endemism.
Term
why is edemism important for conservation biology?
Definition
contributes to an area's uniqueness and special importance of biodiversity.
Term
Languages of Madagascar:
Definition
The official languages are Malagasy and French. Area has a very high level of endemism.
Term
Nile perch story
Definition
Nile perch in lake victoria caused over 200 species of cichlid populations to crash as perch exploded. native people impoverished. greatly reduced gamma diversity. didn't happen for 30 years.
Term
cold spot theory
Definition
hot spot model causes us to ignore all the cold spots, which have important ecological services.
Term
population health and genetic variation.
Definition
generally population health is positively correlated to genetic diversity. heterozygosity is thought to be important but to what extent we don't know. Loss of it however does suggest serious problems.
Term
higher levels of heterozygosity and life history
Definition
tropical more than temperate. broad geographic range more than endemic. generalist vs specialist. ecological extremes. nonterritorial > territorial. small > large. tend to have greater fitness.
Term
fundamental theorem of natural selection
Definition
the rate of evolutionary change in population is proportional to the amount of genetic variation.
Term
effective population size
Definition
how many individuals are actually breeding.
Term
3 levels of genetic variation
Definition
within individuals, between individuals in a population and among diff individuals.
Term
how does genetic variation arise?
Definition
ultimate source is mutation which is not very common. sexual recombination is a good source.
Term
monomorphic vs polymorphic
Definition
same allele vs different allele where allele is a pair of genes at some locus.
Term
Quantitative genetics
Definition
the study of continuous traits (such as height or weight) and their underlying mechanisms.
Term
population variation consists of type of alleles present and their frequencies.
Definition
Term
inbreeding vs outbreeding
Definition
both can result in a reduced fitness because a ressive allele could gain frequency or heterozygosity could be lost vs loss of adventigous alleles.
Term
what is individual genetic variation important?
Definition
can help with captive breeding programs and is the basis for natural selection.
Term
widespread organisms tend to have a higher level of genetic diversity.
Definition
Term
panmictic
Definition
all individuals are potential partners. very rare occurrence.
Term
founder effect
Definition
loss of genetic diversity that occurs when a new population is established by a small number of individuals.
Term
genetic/allele drift
Definition
change in the relative allele frequencies that occurs naturally.
Term
population bottleneck
Definition
a species contracts to a small population in a short period of time.
Term
rare alleles are lost from small isolated populations.
Definition
Term
most causes of animal extinction:
Definition
species introduction and habitat loss.
Term
Tropical forest examples
Definition
sao paulo brazil, gutamala and peten forests.
Term
max growth rate per year based just on reproduction size
Definition
3 to 4 %
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