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

Wildfire effects on stream metabolis...

Davis, Emily A.

Linked to FindBook

Google Book

Amazon

博客來

Wildfire effects on stream metabolism: Aquatic succession is mediated by local riparian succession and stream geomorphology.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Wildfire effects on stream metabolism: Aquatic succession is mediated by local riparian succession and stream geomorphology./
Author:	Davis, Emily A.
Description:	82 p.
Notes:	Source: Masters Abstracts International, Volume: 55-02.
Contained By:	Masters Abstracts International55-02(E).
Subject:	Aquatic sciences. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1599789
ISBN:	9781339071497

Wildfire effects on stream metabolism: Aquatic succession is mediated by local riparian succession and stream geomorphology.
Davis, Emily A.

Wildfire effects on stream metabolism: Aquatic succession is mediated by local riparian succession and stream geomorphology. - 82 p.

Source: Masters Abstracts International, Volume: 55-02.

Thesis (Master's)--University of Washington, 2015.

As climate change shifts and intensifies fire regimes, it is important to understand stream ecosystem responses to fire. How stream metabolism responds remains largely unexplored. We investigated effects of fire severity and watershed geomorphology on stream ecosystem metabolism at multiple spatial scales in an Idaho wilderness watershed. We measured dissolved oxygen, temperature, and irradiance in 18 streams varying in fire history and watershed characteristics in order to model diel oxygen dynamics, from which we estimated rates of production (P) and respiration (R), then used P:R as an index of stream metabolic state. We found that post-fire riparian canopy recovery strongly influenced stream metabolic state. Severely burned streams with dense riparian regrowth were heterotrophic, whereas streams with less canopy recovery were autotrophic. Fire effects on stream metabolic state were highly mediated by watershed geomorphology, with the strongest long-term changes observed in low-order, narrow, steep streams. Effect sizes of fire and watershed geomorphology on stream metabolism changed from fine spatial scale (500-m riparian buffer) to coarse scale (watershed), and were strongest at fine scales. These results indicate that the physical habitat template mediates aquatic ecosystem response to disturbance, and that context and scale should be explicitly considered in assessments of ecosystem response to fire.

ISBN: 9781339071497Subjects--Topical Terms:

3174300
Aquatic sciences.

Wildfire effects on stream metabolism: Aquatic succession is mediated by local riparian succession and stream geomorphology.
LDR:02356nmm a2200289 4500 001 2074759
005 20161020134838.5
008 170521s2015 ||||||||||||||||| ||eng d
020 $a 9781339071497
035 $a (MiAaPQ)AAI1599789
035 $a AAI1599789
040 $a MiAaPQ $c MiAaPQ
100 1 $a Davis, Emily A. $3 3190104
245 1 0 $a Wildfire effects on stream metabolism: Aquatic succession is mediated by local riparian succession and stream geomorphology.
300 $a 82 p.
500 $a Source: Masters Abstracts International, Volume: 55-02.
500 $a Adviser: Daniel E. Schindler.
502 $a Thesis (Master's)--University of Washington, 2015.
520 $a As climate change shifts and intensifies fire regimes, it is important to understand stream ecosystem responses to fire. How stream metabolism responds remains largely unexplored. We investigated effects of fire severity and watershed geomorphology on stream ecosystem metabolism at multiple spatial scales in an Idaho wilderness watershed. We measured dissolved oxygen, temperature, and irradiance in 18 streams varying in fire history and watershed characteristics in order to model diel oxygen dynamics, from which we estimated rates of production (P) and respiration (R), then used P:R as an index of stream metabolic state. We found that post-fire riparian canopy recovery strongly influenced stream metabolic state. Severely burned streams with dense riparian regrowth were heterotrophic, whereas streams with less canopy recovery were autotrophic. Fire effects on stream metabolic state were highly mediated by watershed geomorphology, with the strongest long-term changes observed in low-order, narrow, steep streams. Effect sizes of fire and watershed geomorphology on stream metabolism changed from fine spatial scale (500-m riparian buffer) to coarse scale (watershed), and were strongest at fine scales. These results indicate that the physical habitat template mediates aquatic ecosystem response to disturbance, and that context and scale should be explicitly considered in assessments of ecosystem response to fire.
590 $a School code: 0250.
650 4 $a Aquatic sciences. $3 3174300
650 4 $a Biogeochemistry. $3 545717
650 4 $a Ecology. $3 516476
690 $a 0792
690 $a 0425
690 $a 0329
710 2 $a University of Washington. $b Aquatic and Fishery Sciences. $3 2093042
773 0 $t Masters Abstracts International $g 55-02(E).
790 $a 0250
791 $a Master's
792 $a 2015
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1599789