ENVIRONMENTAL FINAL - Unit 2 Flashcards
Which of the following statements is not true
a) larger islands contain more species than smaller islands
b) larger islands contain more biotic and less biotic factors than smaller islands
c) larger islands are more common than smaller islands and can support more species
d) none of the above
b
_________ is the only plant that has evolved to live fully in the ocean
seagrass
why does kelp not survive in tropical waters
it cannot take in the nutrients it needs to survive
which of the following was an example of an invasive species
brown tree snake
t/f upwelling helps stir up nutrients from deep in the oean
t
t/f distance between habitats and a source of colonization does not affect species richness
f
t/f only select species can disperse long distances
t
t/f islands are subject to invasive species because they are primarily generalist species
f
biodiversity
the diversity of life forms in an environment
-crucial to population survival
4 biodiversity scales
-genetic
-species
-habitat
-ecosystem
genetic biodiversity
-measure of the genetic variation in a population
-large populations have higher variations in their populations
(ex: white tailed deer)
-if a large population declines, the genetic diversity declines (causes a population bottleneck)
species biodiversity
-measures the number of species in a region or ecosystem
habitat biodiversity
measures the variety of habitats in a given ecosystem
specialists: small range
generalists: wide range
ecosystem biodiversity
-measures the variety of ecosystems that exist in a given region
what are some of the services provided by mangrove trees?
protects coastlines, nurseries or organisms, provides food
in certain parts of the world, people are destroying mangroves to make ________. the idea behind this is that they are adding ________ to that part of the coastline by producing a commerciably viable product
shrimp fisheries; economic value
how does the value of the undisturbed mangrove swamp compare to that of the shrimp fisheries
3-4x of the value than the shrimp fisheries
according to the video on “Human and ecosystem services,” new york city had a major problem with
a) quality of air
b) quality of source water
c) quality of human health
d) all of the above
b
____ are places for the recycling and removal of dangerous chemicals from water and for clarifying and cleaning water
wetlands
boreal forests are another name for
taiga
if you wanted to visit a tropical rainforest, where would you most likely travel?
a) central africa
b) eastern north america
c) western europe
a
if you were to travel from the north pole southward toward the equator, what would be the most logical order of biomes you would encounter
tundra, taiga, temperate forest, tropical rainforest
which of the following species is considered a specialist species
a) snow leopard
b) white tailed deer
c) skunk
a
1 hectare is equal to ____ acres
2.5 acres
if a national park contains 312.4 hectares, what is the approximate size in acres?
312.4 hectare x 2.5 acres/1 hectare
781 acres
scientists estimate there are approximately __________ species on Earth
10,000,000
which biome is the most biodiverse in the world
tropical rainforest
what is the key factor when determining if a biome is a desert
precipitation/how dry it is
t/f if a species has low genetic diversity, the population will increase when exposed to environmental change and disease
f
t/f the loss of several habitats can lead to a loss of generalist species
t
t/f species biodiversity is an indicator as to the health of an environment
t
t/f species richness is the best indicator when determining if there is a dominant species in a given area
f
