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104 terms

Vegetation

STUDY
PLAY
a collection of species that occur together in the same habitat at one time
definition of community
a group of species with similar lifestyles, epiphytes
definition of guild, provide and example
emergent, canopy, understorey, shrub layer, forest floor
tiers in a forest (5)
kauri
example of an emergent species in New Zealand
puriri
example of a canopy species in New Zealand
kawakawa
example of an understorey species in New Zealand
competition
the struggle between organisms to survive in a habitat with limited resources; stronger within a guild, strongest within a species (intraspecific).
predation
interaction in which one organism captures and feeds on another organism; a key problem for sessile plants which is accommodated through mechanical and chemical defenses.
parasitism
form of predation that leaves the host alive (e.g. mistletoe)
commensalism
one species is neutrally affected and one species benefits (e.g. epiphytes)
mutualism
both species benefit (e.g. mychorrhizae on plant roots)
mychorriza
*mutualistic interaction in which a fungus grows on plant root hairs, increasing the root surface area so plants experience increased nutrient uptake and the fungus leeches food from the plant.
environment
spatial change is caused by changes in __________________
biomes
large scale spatial change occurs between ____________________
lowland tropical rainforest
biome at equatorial latitudes, dominated by angiosperms, high spp. diversity, spp. with tolerance of higher temperatures
warm temperate rainforest
biome at mid latitudes, dominated by angiosperms and gymnosperms, moderate spp. diversity, app. with tolerance of cooler temperatures (e.g. winter deciduous)
boreal forest
biome at high latitudes, dominated by gymnosperms, low spp. diversity, app. tolerant of low temperatures
tundra
biome at polar latitudes, very few spp., low-growing plants adapted to cold/wet conditions
vegetative zonation, elevation
_____________________ is an example of a moderate scale spatial change, and is caused by changes in _____________________.
Kamahi
tree with a broad elevation tolerance (little sensitivity to elevation gradient)
Rimu
tree with a narrow elevation tolerance (high elevations)
forest zonation, flood frequency
_____________________ is an example of a small scale spatial change, and is caused by changes in _____________________.
Matai
nutrient demanding tree that requires flooding every few years
Totara
dry-foot tree, has lower nutrient needs and requires decadal flooding
Kahikatea
wet-foot tree, huge biomass and thus huge nutrient demands, requires annual flooding
Clements
scientist who pioneered the field of plant succession
directional series of changes over time in the environmental condition and species composition at a particular site
succession
pioneer, mid-successional, mature phase
three stages in primary succession
access to light
principle changing variable in succession
time
succession is niche defined in ________________.
mature phase forest
late successional forest that experiences low light and intense competition
disturbance
after a _________________ (e.g. volcanic erruption, tree fall gap), the site experiences high light, forest regeneration; promotes spp. diversity
kanuka, manuka
two examples of pioneer guild plants
pioneer guild
guild that lasts 50-80 years, examples of which include manuka and kanuka
kanuka, light-demanding, stress-tolerant, highly dispersive, a weak competitor, disturbance-dependent, short-lived
a pioneer guild species like _______________ is generally (6):
mamangi, maire
two examples mid-successional guild plants
kohekohe, taraire, kauri
three examples late-successional guild plants
kohekohe, shade-tolerant, stress-intolerant, less dispersive, a strong competitor, disturbance independent, long-lived
a late-successional guild species like _______________ is generally (6):
riparian zonation, exposure and substrate
_____________________ is an example of a very small scale spatial change, and is caused by changes in _____________________.
Rimu
gymnosperm example of a Gondwanan plant
Rewarewa
angiosperm example of a Gondwanan plant
Horopito, plesiomorphic
an angiosperm example of a Gondwanan that has a basal or ________________ flower with leaf-like stamens and open carpels without styles
Nothofagus
_________________ are also evidence of Gondwanan origins because they occur in Aus./NZ, S. America, and New Caledonia, but their seeds can't disperse further than across 25 km of sea
bogs
_________________ provide evidence of past vegetation because they are sites of pollen deposition and preservation.
instantaneous, 400
the transition from glacial cold-tolerant community to a warm climate forest was almost ____________________; it lasted around ____________________ years.
Matai
the first colonizer in post-glacial recovery
Rimu
the second colonizer in post-glacial recovery
Southern Rata
part of the myrtle family, this tree is was dispersed from Australia/Antarctica (non-Gondwanan)
Kohekohe
a plant of non-Gondwanan origins that's part of the mahogany family
tree-ferns, Nothofagus
during the Holocene era, initial vegetative dominance was by dispersive __________________ in montane habitats, followed by the slow-spreading of ____________________.
pleistocene, grass-shrubland, Northland/Coromandel, shrubland, tussock-herbfield
during the ___________________ epoch, New Zealand experienced periods of glaciation which became increasingly more severe. _____________________ was widespread, forests were dominant only in _____________________. In the North Island, subalpine _____________________ was dominant south of Auckland, and in the South Island, _____________________ was widespread.
frugivory, attachment, flotation, wind
modes of plant dispersal in order of frequency (4)
podocarps, gymnosperm, 60
_____________________ have _____________________ leaves: they're small and scale-like, have parallel venation, and have __% of the photosynthetic efficiency of broadleaf Angiosperms.
light-dependent, disturbance-dependent, long-lived
podocarp seedlings are (3):
podocarps, shade-tolerant, light-demanding
Rimu, Kahikatea, Totara, Matai, and Miro are all examples of _________________. Miro is an exception because it's _____________________, whereas the first four are _____________________.
broadleaf angiosperms
Puriri, Rewarewa, Kohekohe, Mangeao, Tawa, Kamahi, Manuka, and Kanuka are all examples of:
Tree-ferns
_____________________ pioneer small gaps.
Lake Taupo, Nuee Ardente, podocarps
_____________________ experienced _____________________ volcanic flow, giving the stress-tolerant _____________________ the advantage.
dense podocarp forest, emergents, Angiosperms
Whirinaki is a _____________________, unusually dominated by _____________________; _____________________ form the main canopy, trees are present but suppressed.
manuka, kanuka, podocarp, podocarp, natural thinning, podocarps, species composition
Large scale regeneration cycle: 1, _____________________/_____________________ scrub, abundant _____________________ seedlings; 2, _____________________ pole stage, stand depresses kanuka etc.; 3, _____________________ of _____________________ as they increase in height; 4, shift in _____________________
tree ferns, kamahi, tree ferns, Tawa, podocarp, podocarps
Gap regeneration cycle: 1, gap created by fall of large tree is colonized by _____________________; 2, _____________________ grows and suppresses the _____________________, _____________________ on gap margins, _____________________ seedlings beneath; 3, rapid growth of pole _____________________ to occupy gap
podocarps, hardwoods, beeches
As altitude increases, vegetation zonation is _____________________ -> _____________________ -> _____________________
pumice, broadleafs, podocarps
_____________________ substrate holds more water, thus producing more stressful conditions that _____________________ can't tolerate, but _____________________ can
Rimu, semi-shade-tolerant, mixed
*(relatively) _____________________ podocarp, _____________________-age stand, medium colonization length
Miro, most shade-tolerant, mixed
*(relatively) _____________________ podocarp, _____________________-age stand, longest colonization length, ongoing juvenile recruitment
Matai, light-demanding, even
*(relatively) _____________________ podocarp, _____________________-age stand, one cohort, shortest colonization length
Tawa, Kohekohe, gap-dependent, gaps, frost
*two strongly shade-tolerant broadleafs in Rotoehu Forest; not _____________________ for regeneration but rather negatively affected by __________________ due to ____________________ sensitivity.
Mangeao, Rewarewa, small gap, all
*two more light-demanding broadleafs in Rotoehu Forest; _____________________ specialists, seedlings of ______________ size class(es)
Tawa, Kamahi, Rimu, Miro, Tawa
*_____________________ dominant in Urewera National park, _____________________, _____________________, and _____________________ suppressed; fewer _____________________ at higher elevations, others increase in abundance
archaic conifer
being from 200 million years ago, Kauri are an example of an _____________________.
ecosystem engineers
Kauri are _____________________, creating alternate stable states.
alternate stable state
in presence of plant, like Kauri, the community is differently structured than in absence
Kohekohe, puriri
two main competitors of Kauri
Toru, Tawari
*two kauri associate species that experience depressed nutrient cycling
slow organic decay, litter, cup podsol, depressed
Kauri as an ecosystem engineer: _____________________ under Kauri causing the creation of a deep layer of _____________________; creation of a _____________________ underneath tree; _____________________ cycling
terpenes, waxes, phenols, inhibit bacteria and fungi
three methods to slow decay of Kauri litter and what these four methods do
broadleaf, conifer
_____________________ litter is thinner wheras _____________________ litter is generally thicker
cup podsol, acidic, neutralizes nutrients, leaching
*Kauri creates a _____________________: litter is _____________________, which _____________________ and flushes them deeper, promoting _____________________
nitrogen, ammonium, nitrate
Kauri depressed nutrient cycling converts _____________________ to _____________________ which is toxic for other plants, rather than _____________________ which is generally better for plants
ridge crest specialists, rapid podsolization, high, frequent, long-lived
*Kauri are _____________________ which helps with _____________________ and access to _____________________ light, _____________________ disturbance. They are _____________________-lived
short recruitment, competition, self-thinning, competition, recruitment, synchronized disturbance, biomass, broadleafs, ridgecrest
1st Kauri cohort after disturbance: _____________________ phase due to lack of _____________________, followed by a _____________________ and mature phase due to intense _____________________. 2nd cohort: longer _____________________ phase without _____________________, part of 2nd cohort _____________________ replaced by _____________________ as Kauri retreat to _____________________.
retreated north, returned south, mean daily maximum temperature
*Kauri _____________________ during glaciation and _____________________ post-glaciation, because they require a _____________________ of 17 oC
Matai, softwood, self-preserved
_____________________ is a _____________________ that produces superior timber, a tall tree that's straight grained. Its timber is _____________________ and richly colored
Tawa, hardwood, decays faster, Red Beech, hardwood
_____________________ is a _____________________ that produces an inferior timber, a smaller log which _____________________. _____________________ is another example of a _____________________.
Nothofagus, erratic, best, collapsing residual
in north Westland, a remnant _____________________ forest, logging was _____________________ and piecemeal, targeting only the _____________________ trees, leaving a _____________________ stand.
decreased, increase, remained constant, increased, remained constant, disease, insect attack, pinhole borer
Managed beach forest dynamics: density _____________________, residual diameter _____________________, basal area _____________________, height and volume _____________________. After 100 years: volume _____________________, and stems are large enough to harvest and should be, rather than waiting for _____________________ or _____________________ (e.g. _____________________)
aggressive, more careful, Tawa, too small
*Tihoi: _____________________ harvest; Whirinaki: _____________________ harvest, improved stand stability, but regeneration by _____________________ because gaps created were _____________________ for podocarp regeneration.
coup felling, podocarps, large disturbance, stand senesence
*Saltwater Forest: Wetland silviculture model: _____________________, advantages valuable _____________________, mimics _____________________ regime, harvest just as _____________________ begins
Kauri, ridge crests, unfamiliar slope position, ringbarking, expensive, time-consuming
_____________________ is the most valuable timber, attempted planting all over slopes (not just on _____________________), poor survival of planted juveniles in _____________________, _____________________ of competitors. this method is too _____________________ and _____________________, and therefore not feasible.
recreational, conservation
the modern view of silviculture holds that forests have greater _____________________ and _____________________ blue than they do as timber
Hard Beech
most northerly, most lowland, often found in forest with kauri, abundant in lower montane of northern Southland, occurs in ecotonal forest with lowland species
Red Beech
largest, abundant in lower montane throughout Southland and Bay of Plenty, like hard beech, occurs in ecotonal forest with lowland species, can be found in mixed Podocarp forests
Black Beech
often grows with Mountain Beech, found in eastern NZ in foothills at ridge crest (where it's drier), poor soil specialists, mixed with lowland spp. in lower montane
Mountain Beech
often grows with Black Beech, high elevation, lower to upper montane, found in drier east central North Island southwards
Silver Beech
found in wetter west, Bay of Plenty southwards, high rainfall, lower to upper montane, forming treeline
shade-tolerant, mixed
Silver beeches are _______________ (light-damanding/shade-tolerant) and structured in __________ (mixed/even) -age stands.
decreases
Beech forest tree species diversity _____________ as altitude (and stress) increases, but not herb and shrub spp. diversity
decreases
*Beech forest spp. diversity ______________ as rainfall decreases
light-demanding, even
Black beeches are _______________ (light-damanding/shade-tolerant) and structured in __________ (mixed/even) -age stands.
light-demanding, even
Mountain beeches are _______________ (light-damanding/shade-tolerant) and structured in __________ (mixed/even) -age stands.
light-demanding, even
Hard beeches are _______________ (light-damanding/shade-tolerant) and structured in __________ (mixed/even) -age stands.
light-demanding, even
Red beeches are _______________ (light-damanding/shade-tolerant) and structured in __________ (mixed/even) -age stands.
increase, level out
*during periods of stand development, biomass tends to first ______________ and then __________________ as the stand reaches maturity.
even-aged in distinct groups
*in Saltwater Forest, the stand structure that facilitated coup-felling was: