Biodiversity Flashcards

1
Q

definition of species

A

group of organism with similar physiology;
which can breed together;
to produce fertile offspring;
reproductively isolated from other species;

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2
Q

definition of niche

A

role of an organism in ecosystem

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3
Q

definition of ecosystem

A

self-contained, interacting community of organisms;

and the environment in which they live and interact in;

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4
Q

definition of habitat

A

place where a species lives within an ecosystem

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5
Q

definition of endemic species

A

species only found in that area

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6
Q

definition of biodiversity

A

the degree of variation of organism in ecosystem;
includes number of species;
and genetic variation within each species;

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7
Q

definition of genetic diversity

A

diversity of alleles within all genes of single species;

adapting to biotic/abiotic factors

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8
Q

definition of species diversity

A

measure of evenness of abundance of the different species

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9
Q

definition of species richness

A

number of species in a community

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10
Q

how can we collect organisms and make species list

A

use identification keys

use drawings/photographs

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11
Q

describe random sampling to assess species diversity

A

use measuring tape
use random number generator
give random coordinates for quadrat

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12
Q

what can random sampling determine

A
species frequency (measure of chance of species being found in one quadrat)
species density (individuals/area)
percentage cover (smaller squares)
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13
Q

describe systematic sampling to assess species diversity

A

line transect - finding organisms at regular points (more than one habitat)
interrupted belt transect - abundance of organisms within quadrat

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14
Q

how do we determine estimate number for a population

A

place harmless trap (food/cage);
mark using non toxic way;
release and wait for a day to repeat procedure;
capture - mark - release

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15
Q

what statistical tests are use to determine species diversity

A

simpson’s index of diversity
spearman’s rank correlation
pearson’s correlation coefficient

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16
Q

in what occassions do we use spearman’s rank

A

not normally distributed
ordinal data
data points are independant
10-30 pairs of data

17
Q

in what occassions do we use pearson’s correlation

A

linear relationship
quantitative data
normall distributed
at least 10 pairs of data

18
Q

definition of taxanomy

A

naming/classifying organisms

19
Q

describe characteristics of domain bacteria (8)

A
no nucleus;
circular DNA;
NO histones present;
no membrane bound organelles;
70S ribosomes;
peptidoglycan cell wall;
binary fission;
unicellular;
20
Q

describe characteristics of domain archaea

A
no nucleus;
circular DNA;
histones present;
no membrane bound organelles;
70S ribosomes;
cell wall (not peptidoglycan);
binary fission;
unicellular;
21
Q

describe characteristics of domain eukarya (9)

A
nucleus;
linear DNA;
histones present;
circular mtDNA;
membrane bound organelles;
80S ribosomes;(except mit + chlo)
cell wall in plants;
mitosis;
uni/multicellular;
22
Q

threats to biodiversity (6)

A
habitat loss;
climate change;
deforestation;
excessive fertilisers;
pollution;
unsustainable use of resources;
23
Q

why does biodiversity matter (5)

A
moral and ethical;
ecological reasons;
aesthetic reasons;
social and commerical reasons;
absorb carbon dioxide;
24
Q

how are endangered species protected (4)

A

national parks
zoos
restoring degrading habitats
botanic gardens

25
describe how national parks protect species
protected and managed by park - tourism helps provide money to sustain place
26
describe how zoos protect species (4)
research; education; captive breeding; assisted reproduction;
27
describe how botanic gardens protect species (3)
research; education; reintroduce species to habitats;
28
describe how seed banks are used (9)
``` variety of seeds; long term storage; prevent germination; frozen; seeds regularly tested for viability; seeds restocked regularly; maintain genetic diversity; maintains biodiversity; for future use; research; ```
29
problems with overprotecting species (3)
culling to reduce numbers; transferring animals over large distances; beyond capacity ecosystem can sustain
30
describe controlling alien species
alien species = species moved from one ecosystem to another where they were unknown - may push other species to extinction and act as predators
31
describe kingdom protoctista (3) | E M CELLWALL
eukaryotic mostly single celled some have no cell wall
32
describe kingdom fungi (5)
``` eukaryotic no chlorophyll reproduce by spores heterotrophic nutrition chitin cell wall ```
33
describe kingdom plantae (5)
``` multicellular some have chloroplasts large permanent vacuole cellulose cell wall few types of specialised cells ```
34
describe kingdom animalia (6)
``` multicellular differentiated cells form tissues/organs cells do not have chloroplasts cell vacuoles are small/temporary cells don't have cell wall communication by nervous system ```
35
describe viruses (4)
structure only visible by electron microscope acellular infect cells and use host cell by respiration to provide energy DNA/RNA strand either present