organism and population Flashcards
father of ecology in India
ramdeo misra
maximum and minimum productivity
tropical forest, arctic and alpine tundra
eurythermal [warm blooded]
who can tolerate wide range of temperatures, homeostasis eg; birds and mammals, *regulate
stenothermal [cold blooded]
can tolerate only narrow range of temperature, eg; lizard, 99% animals and all plants, confirm*
salt concentration
inland H2O < 5ppt
sea 30-35 ppt
hypersaline legume > 100ppt
euryhaline
can tolerate wide range of salinities
siberian crane
Keoladeo national park [ bharathpur Rajasthan]
stenohaline
tolerate narrow range of salinity
Aestivation
summer sleep
eg; fish and snail
hibernation
winter sleep
diapause
a stage of suspended development of many zooplankton in lake and ponds
Physiological adaptations
kangaroo rat
adaptation in desert
Anatomical adaptation; thick cuticle
Physiological adaptation ; stomata remain closed during day time
Morphological adaptation ; leaves re reduce to spines
Allens rule
cold region mammals have shorter ears and limbs
bergmanns rule
large size animals in colder region
birth rate
change/ initial = final-initial/initial
attributes of population
birth rate
death rate
sex ratio
population density
age pyramid
death rate
initial-final/initial
age pyramid
triangular -expanding
bell shaped - stable
urn shaped -declining
biomass
eg; parthenium grass and banyan tree
relative density
eg; no. of fish caught in trap indicates its total population density in the lake
indirect count
eg; based on pug marks and fecal pellet
population density’N’
B+,I+ ,D-,E-
N[t+1]
N +[{B+I} - {D+E}]
