東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Impacts of Multiple Fires and Wind D...

Anoszko, Elias Rasch.

FindBook

Google Book

Amazon

博客來

Impacts of Multiple Fires and Wind Disturbance on Forest Community Composition, Succession and Diversity in the Boundary Waters Canoe Area Wilderness.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Impacts of Multiple Fires and Wind Disturbance on Forest Community Composition, Succession and Diversity in the Boundary Waters Canoe Area Wilderness./
作者:	Anoszko, Elias Rasch.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	213 p.
附註:	Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.
Contained By:	Dissertation Abstracts International79-08B(E).
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10745701
ISBN:	9780355807387

Impacts of Multiple Fires and Wind Disturbance on Forest Community Composition, Succession and Diversity in the Boundary Waters Canoe Area Wilderness.
Anoszko, Elias Rasch.

Impacts of Multiple Fires and Wind Disturbance on Forest Community Composition, Succession and Diversity in the Boundary Waters Canoe Area Wilderness. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 213 p.

Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.

Thesis (Ph.D.)--University of Minnesota, 2018.

Under a warming climate, the Boundary Waters Canoe Area Wilderness (BWCAW) of Northern MN is expected to see an increase in the frequency of disturbances including wildfires and severe windstorms. While boreal forests such as those of the BWCAW are generally considered disturbance adapted, it is uncertain how changing disturbance regimes will impact these forests. We used a series of recent disturbances in the BWCAW ranging from areas affected by wind or fire only, to areas affected by wind followed by fire, or multiple fires, to examine how predicted changes in boreal disturbance regimes are likely to impact these forests. We found that multiple disturbances typically had greater cumulative disturbance severity than single disturbance events and in the case of wind+fire combinations also tended to burn with greater intensity, and fire severity relative to areas affected by a single fire only. While diversity-severity relationships varied in shape, we found that diversity was generally lower at high disturbance severity relative to moderate severities. Multiple disturbances had modestly reduced diversity relative to single disturbances, but this relationship varied depending on the spatial scale of inquiry. Despite only modest impacts on diversity, multiple disturbances did have a pronounced impact on succession and composition. Regardless of pre-disturbance composition, multiple disturbances resulted in succession to aspen and paper birch, with birch being more dominant in areas burned in late season fires and aspen more dominant in areas burned by early season fires. Stands subjected to single disturbance events exhibited multiple successional pathways and mix of forest types. Our results suggest that predicted changes in boreal disturbance regimes are likely to have minor impacts on woody plant diversity, but could adversely affect disturbance adverse species, and alter the age structure and composition of forests by reducing long-lived boreal conifers and increasing the dominance of aspen and paper birch.

ISBN: 9780355807387Subjects--Topical Terms:

516476
Ecology.

Impacts of Multiple Fires and Wind Disturbance on Forest Community Composition, Succession and Diversity in the Boundary Waters Canoe Area Wilderness.
LDR:03100nmm a2200313 4500 001 2161905
005 20181002081326.5
008 190424s2018 ||||||||||||||||| ||eng d
020 $a 9780355807387
035 $a (MiAaPQ)AAI10745701
035 $a (MiAaPQ)umn:18975
035 $a AAI10745701
040 $a MiAaPQ $c MiAaPQ
100 1 $a Anoszko, Elias Rasch. $3 3349873
245 1 0 $a Impacts of Multiple Fires and Wind Disturbance on Forest Community Composition, Succession and Diversity in the Boundary Waters Canoe Area Wilderness.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 213 p.
500 $a Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.
500 $a Advisers: Lee E. Frelich; Peter B. Reich.
502 $a Thesis (Ph.D.)--University of Minnesota, 2018.
520 $a Under a warming climate, the Boundary Waters Canoe Area Wilderness (BWCAW) of Northern MN is expected to see an increase in the frequency of disturbances including wildfires and severe windstorms. While boreal forests such as those of the BWCAW are generally considered disturbance adapted, it is uncertain how changing disturbance regimes will impact these forests. We used a series of recent disturbances in the BWCAW ranging from areas affected by wind or fire only, to areas affected by wind followed by fire, or multiple fires, to examine how predicted changes in boreal disturbance regimes are likely to impact these forests. We found that multiple disturbances typically had greater cumulative disturbance severity than single disturbance events and in the case of wind+fire combinations also tended to burn with greater intensity, and fire severity relative to areas affected by a single fire only. While diversity-severity relationships varied in shape, we found that diversity was generally lower at high disturbance severity relative to moderate severities. Multiple disturbances had modestly reduced diversity relative to single disturbances, but this relationship varied depending on the spatial scale of inquiry. Despite only modest impacts on diversity, multiple disturbances did have a pronounced impact on succession and composition. Regardless of pre-disturbance composition, multiple disturbances resulted in succession to aspen and paper birch, with birch being more dominant in areas burned in late season fires and aspen more dominant in areas burned by early season fires. Stands subjected to single disturbance events exhibited multiple successional pathways and mix of forest types. Our results suggest that predicted changes in boreal disturbance regimes are likely to have minor impacts on woody plant diversity, but could adversely affect disturbance adverse species, and alter the age structure and composition of forests by reducing long-lived boreal conifers and increasing the dominance of aspen and paper birch.
590 $a School code: 0130.
650 4 $a Ecology. $3 516476
650 4 $a Forestry. $3 895157
650 4 $a Natural resource management. $3 589570
690 $a 0329
690 $a 0478
690 $a 0528
710 2 $a University of Minnesota. $b Natural Resources Science and Management. $3 1027864
773 0 $t Dissertation Abstracts International $g 79-08B(E).
790 $a 0130
791 $a Ph.D.
792 $a 2018
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10745701