Biological Diversity In Stands

Question 1

What are NDT 1?

Answer 1

Rare events (250-350)

Common in most of the wet coastal areas and high elevation zones
Common in CWHwh, ESSFwk, ICHwk, MH

Produce large continuous patches of late seral stands with dispersed small openings or patches of early to mid seral. Objective is to maintain late seral communities and connectivity between stands. (Clearcut with connectivity)

Question 2

What is NDT 2?

Answer 2

Infrequent disturbance (every 200 years)

Common in CWHws, ESSFmv, ICHmc

Produces similar stand patterns to NDT 1 but smaller due to higher frequency of events (fire / insect)

Some retention systems (small openings with infrequent large ones that have some old growth structure.) “Group retention”

Question 3

What is a FEN?

Answer 3

Forest Ecological Network

Question 4

What is NDT 3?

Answer 4

Frequent ( every 100-150 years )

Common in BWBS, ICHdw, MSxk/xv/dc, SBS

Many stands of varying sizes due to frequency of short duration fires

Produces pattern with many early seral stands and few scattered late ones with a high degree of connectivity.

Question 5

What is NDT 4?

Answer 5

Common to dryer zones such as BB, PP, ICHxw

Large proportion of landscape is maintained in stands of mid to late early seral stages.

Create infrequent large openings and maintain a varitety of crown layers. (Consider uneven aged management.)

Question 6

What is NDT 5?

Answer 6

Infrequent due to short snow free season

Common in AT and MH

Harvesting is uncommon and early seral stands are very rare
Harvest small openings leaving large areas of late seral stands.

Question 7

How are BC forest managed to maintain biodiversity.

Answer 7

Harvesting attempts to emulate natural disturbance (END) where regions are managed based on dominant disturbance type.

Question 8

What are the 4 levels of biodiversity planning?

Answer 8

• Regional
• Sub-regional
• Landscape
• Stand

Question 9

How is landscape level management planned for?

Answer 9

Maintain a good variety of seral stages in accordance with the NDT with lots of connectivity.

Question 10

How is biodiversity managed at the stand level?

Answer 10

• Irregular block boundaries - narrow is good
• Leave large woody debris - scattered and piles
• Leave scattered and bunches of wildlife trees as well as diversity of age classes
• Regen with mixed species
• Maintain a good proportion of vegetation in riparian areas
• Avoid excessive brush control - do not discourage deciduous
• Promote the development of oldgrowth structures

Question 11

What are the old growth structures ?

Answer 11

• Large trees
• Large crowns
• Layered canopy
• Standing woody debris
• Spatial diversity
• Diversity of species

Question 12

Which stands have a higher carrying capacity?

Answer 12

Uneven aged stands can typically support more SPH.