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

An assessment of plant community str...

Matney, Casey A.

Linked to FindBook

Google Book

Amazon

博客來

An assessment of plant community structure, herbivory, soils, and state-and-transition theory on a winterfat (Krascheninnikovia lanata [Pursh] A. D. J. Meeuse & Smit) ecological site.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	An assessment of plant community structure, herbivory, soils, and state-and-transition theory on a winterfat (Krascheninnikovia lanata [Pursh] A. D. J. Meeuse & Smit) ecological site./
Author:	Matney, Casey A.
Description:	276 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-10, Section: B, page: 5863.
Contained By:	Dissertation Abstracts International71-10B.
Subject:	Biology, Ecology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3425593
ISBN:	9781124265575

An assessment of plant community structure, herbivory, soils, and state-and-transition theory on a winterfat (Krascheninnikovia lanata [Pursh] A. D. J. Meeuse & Smit) ecological site.
Matney, Casey A.

An assessment of plant community structure, herbivory, soils, and state-and-transition theory on a winterfat (Krascheninnikovia lanata [Pursh] A. D. J. Meeuse & Smit) ecological site. - 276 p.

Source: Dissertation Abstracts International, Volume: 71-10, Section: B, page: 5863.

Thesis (Ph.D.)--Oregon State University, 2010.

State-and-transition models (STMs) have been successfully used to describe ecological dynamics in woodlands, shrublands, grasslands, and several other ecosystems. Changes in vegetation and soil are measured to gauge and predict plant community dynamics within ecological states and transitions between alternative ecological states. Ecological states and their boundaries are defined by a range of variability in vegetation and soil parameters. The ecological site classification system used in the United States requires the development of a unique STM model for each defined ecological site. The foundation of the ecological site concept is the estimation and quantification of a historical reference plant community. Historical information, land manager experience, and scientific data are used to quantify the historical reference plant community and gauge changes towards alternative stable states. In regards to winterfat plant communities and the Silty 6-10 PZ ecological site, conceptual STMs have not been fully developed or tested. The objective of this study was to develop, test, and refine a process-based, data supported, STM for the Silty 6-10 PZ ecological site. The predominant factor of disturbance on this ecological site for the last 100 years has been grazing by livestock. To develop the process-based STM for the ecological site, we conducted a piosphere study centered on a livestock watering point and a five-year grazing exclosure study. With these two studies we were able to quantify the resilience of the ecological site when protected from disturbance (exclosure study) and also to quantify the trends of the ecological site when under a continued grazing disturbance (piosphere study). We used the information gathered from both of these studies to refine the STM. The four strongest factors that indicated differences between ecological states were amount of biological soil crust, soil surface aggregate stability, density of winterfat, and frequency of Indian ricegrass. Data from this study supported the initial proposed STM for the Silty 6-10 PZ ecological site. States defined were a Reference Winterfat State (State 1), Sickle Saltbush State (State 2), and a Creeping Wildrye State (State 3). Each ecological state corresponds to a site characterized by high, moderate, and low ecological functioning, respectively.

ISBN: 9781124265575Subjects--Topical Terms:

1017726
Biology, Ecology.

An assessment of plant community structure, herbivory, soils, and state-and-transition theory on a winterfat (Krascheninnikovia lanata [Pursh] A. D. J. Meeuse & Smit) ecological site.
LDR:03373nam 2200289 4500 001 1394109
005 20110419112723.5
008 130515s2010 ||||||||||||||||| ||eng d
020 $a 9781124265575
035 $a (UMI)AAI3425593
035 $a AAI3425593
040 $a UMI $c UMI
100 1 $a Matney, Casey A. $3 1672699
245 1 3 $a An assessment of plant community structure, herbivory, soils, and state-and-transition theory on a winterfat (Krascheninnikovia lanata [Pursh] A. D. J. Meeuse & Smit) ecological site.
300 $a 276 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-10, Section: B, page: 5863.
500 $a Adviser: Tamzen Stringham.
502 $a Thesis (Ph.D.)--Oregon State University, 2010.
520 $a State-and-transition models (STMs) have been successfully used to describe ecological dynamics in woodlands, shrublands, grasslands, and several other ecosystems. Changes in vegetation and soil are measured to gauge and predict plant community dynamics within ecological states and transitions between alternative ecological states. Ecological states and their boundaries are defined by a range of variability in vegetation and soil parameters. The ecological site classification system used in the United States requires the development of a unique STM model for each defined ecological site. The foundation of the ecological site concept is the estimation and quantification of a historical reference plant community. Historical information, land manager experience, and scientific data are used to quantify the historical reference plant community and gauge changes towards alternative stable states. In regards to winterfat plant communities and the Silty 6-10 PZ ecological site, conceptual STMs have not been fully developed or tested. The objective of this study was to develop, test, and refine a process-based, data supported, STM for the Silty 6-10 PZ ecological site. The predominant factor of disturbance on this ecological site for the last 100 years has been grazing by livestock. To develop the process-based STM for the ecological site, we conducted a piosphere study centered on a livestock watering point and a five-year grazing exclosure study. With these two studies we were able to quantify the resilience of the ecological site when protected from disturbance (exclosure study) and also to quantify the trends of the ecological site when under a continued grazing disturbance (piosphere study). We used the information gathered from both of these studies to refine the STM. The four strongest factors that indicated differences between ecological states were amount of biological soil crust, soil surface aggregate stability, density of winterfat, and frequency of Indian ricegrass. Data from this study supported the initial proposed STM for the Silty 6-10 PZ ecological site. States defined were a Reference Winterfat State (State 1), Sickle Saltbush State (State 2), and a Creeping Wildrye State (State 3). Each ecological state corresponds to a site characterized by high, moderate, and low ecological functioning, respectively.
590 $a School code: 0172.
650 4 $a Biology, Ecology. $3 1017726
650 4 $a Natural Resource Management. $3 676989
650 4 $a Agriculture, Range Management. $3 1022885
690 $a 0329
690 $a 0528
690 $a 0777
710 2 $a Oregon State University. $3 625720
773 0 $t Dissertation Abstracts International $g 71-10B.
790 1 0 $a Stringham, Tamzen, $e advisor
790 $a 0172
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3425593