東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Emulating natural disturbance dynami...

Hanson, Jacob J.

Linked to FindBook

Google Book

Amazon

博客來

Emulating natural disturbance dynamics in northern hardwood forests: Long-term effects on species composition, forest structure, and yield.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Emulating natural disturbance dynamics in northern hardwood forests: Long-term effects on species composition, forest structure, and yield./
Author:	Hanson, Jacob J.
Description:	154 p.
Notes:	Source: Dissertation Abstracts International, Volume: 70-11, Section: B, page: 6622.
Contained By:	Dissertation Abstracts International70-11B.
Subject:	Agriculture, Forestry and Wildlife. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3384144
ISBN:	9781109475579

Emulating natural disturbance dynamics in northern hardwood forests: Long-term effects on species composition, forest structure, and yield.
Hanson, Jacob J.

Emulating natural disturbance dynamics in northern hardwood forests: Long-term effects on species composition, forest structure, and yield. - 154 p.

Source: Dissertation Abstracts International, Volume: 70-11, Section: B, page: 6622.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2009.

Ecological forestry practices are designed to emulate natural disturbance processes and restore species and structural features that may be deficient in conventionally managed stands. Recent application of ecological forestry treatments in managed uneven-aged northern hardwood forests have typically emphasized modified selection silviculture that creates small single-tree and multiple-tree gaps and retains some structural features of old-growth forest, such as large trees, snags, and logs. These treatments, however, currently do not emulate the effect of moderate-severity disturbances, which play an important role in shaping the structure and diversity of northern hardwoods, and there is little evidence available on the short- and long-term effects of these treatments on forest structure and yield. The objectives of this project were to (1) investigate the impacts of moderate-severity disturbances on forest structure; (2) design a new multi-cohort management system that emulates these disturbances; (3) incorporate ecological forestry algorithms into an existing forest model (CANOPY); and (4) evaluate the long-term effects of multi-cohort management and other ecological forestry practices on forest composition, structure, and yield.

ISBN: 9781109475579Subjects--Topical Terms:

783690
Agriculture, Forestry and Wildlife.

Emulating natural disturbance dynamics in northern hardwood forests: Long-term effects on species composition, forest structure, and yield.
LDR:03397nam 2200289 4500 001 1397925
005 20110907152229.5
008 130515s2009 ||||||||||||||||| ||eng d
020 $a 9781109475579
035 $a (UMI)AAI3384144
035 $a AAI3384144
040 $a UMI $c UMI
100 1 $a Hanson, Jacob J. $3 1676784
245 1 0 $a Emulating natural disturbance dynamics in northern hardwood forests: Long-term effects on species composition, forest structure, and yield.
300 $a 154 p.
500 $a Source: Dissertation Abstracts International, Volume: 70-11, Section: B, page: 6622.
500 $a Adviser: Craig G. Lorimer.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2009.
520 $a Ecological forestry practices are designed to emulate natural disturbance processes and restore species and structural features that may be deficient in conventionally managed stands. Recent application of ecological forestry treatments in managed uneven-aged northern hardwood forests have typically emphasized modified selection silviculture that creates small single-tree and multiple-tree gaps and retains some structural features of old-growth forest, such as large trees, snags, and logs. These treatments, however, currently do not emulate the effect of moderate-severity disturbances, which play an important role in shaping the structure and diversity of northern hardwoods, and there is little evidence available on the short- and long-term effects of these treatments on forest structure and yield. The objectives of this project were to (1) investigate the impacts of moderate-severity disturbances on forest structure; (2) design a new multi-cohort management system that emulates these disturbances; (3) incorporate ecological forestry algorithms into an existing forest model (CANOPY); and (4) evaluate the long-term effects of multi-cohort management and other ecological forestry practices on forest composition, structure, and yield.
520 $a Moderate wind disturbances produced residual forest conditions that were much more heterogeneous than managed stands. As in standard selection silviculture, moderate windstorms removed trees from a wide range of size classes, but gap sizes and light regimes were much more variable than in managed stands. Based on these findings, the revised CANOPY model was then used to simulate 22 alternative silvicultural treatments over a span of 300 years. Treatments with 80 cm maximum diameters reduced cumulative yield by 24% relative to conventional harvests but were the only treatments to promote structural characteristics similar to old growth. Multi-cohort treatments resulted in little to no reduction in yield but did not differ in structure from treatments with the same maximum diameter. Permanent reserve trees did not greatly affect structure or yield until they were larger than the specified maximum diameter. Reserve tree densities of 7--22 trees/ha reduced cumulative yield by 7--20%. The retention of large diameter trees resulted in a 1% reduction in yield per tree, but if large trees were never harvested, the reduction increased to 2.5% per tree.
590 $a School code: 0262.
650 4 $a Agriculture, Forestry and Wildlife. $3 783690
650 4 $a Natural Resource Management. $3 676989
690 $a 0478
690 $a 0528
710 2 $a The University of Wisconsin - Madison. $3 626640
773 0 $t Dissertation Abstracts International $g 70-11B.
790 1 0 $a Lorimer, Craig G., $e advisor
790 $a 0262
791 $a Ph.D.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3384144