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

Understanding the relationship betwe...

Hall, Eboni.

FindBook

Google Book

Amazon

博客來

Understanding the relationship between water availability and mechanisms of tree survival in urban landscapes.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Understanding the relationship between water availability and mechanisms of tree survival in urban landscapes./
作者:	Hall, Eboni.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:	134 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-04(E), Section: B.
Contained By:	Dissertation Abstracts International78-04B(E).
標題:	Environmental management. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10168943
ISBN:	9781369231663

Understanding the relationship between water availability and mechanisms of tree survival in urban landscapes.
Hall, Eboni.

Understanding the relationship between water availability and mechanisms of tree survival in urban landscapes. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 134 p.

Source: Dissertation Abstracts International, Volume: 78-04(E), Section: B.

Thesis (Ph.D.)--Southern University and Agricultural and Mechanical College, 2016.

This item is not available from ProQuest Dissertations & Theses.

In recent years, Texas and many other states throughout the southwestern United States have undergone seasonally dry and hot periods. It is compelling to attribute mortality of urban trees throughout this region to droughts that have threatened this area over the past few decades. However, the amount of irrigation water applied may pose the biggest threat to the environment in warmer, drier climates where precipitation inputs do not exceed evaporative demand.

ISBN: 9781369231663Subjects--Topical Terms:

535182
Environmental management.

Understanding the relationship between water availability and mechanisms of tree survival in urban landscapes.
LDR:03613nmm a2200313 4500 001 2125134
005 20171113075159.5
008 180830s2016 ||||||||||||||||| ||eng d
020 $a 9781369231663
035 $a (MiAaPQ)AAI10168943
035 $a AAI10168943
040 $a MiAaPQ $c MiAaPQ
100 1 $a Hall, Eboni. $3 3287182
245 1 0 $a Understanding the relationship between water availability and mechanisms of tree survival in urban landscapes.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 134 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-04(E), Section: B.
500 $a Adviser: Kamran Abdollahi.
502 $a Thesis (Ph.D.)--Southern University and Agricultural and Mechanical College, 2016.
506 $a This item is not available from ProQuest Dissertations & Theses.
520 $a In recent years, Texas and many other states throughout the southwestern United States have undergone seasonally dry and hot periods. It is compelling to attribute mortality of urban trees throughout this region to droughts that have threatened this area over the past few decades. However, the amount of irrigation water applied may pose the biggest threat to the environment in warmer, drier climates where precipitation inputs do not exceed evaporative demand.
520 $a Two experiments were conducted to better understand how water availability regulates physiological mechanisms that influence tree mortality or survival in urban landscapes during drought conditions. In Experiment 1, tree morphology, foliar isotopic concentrations, soil chemistry, and physiological mechanisms that regulate gas exchange and water relations at the leaf level of mature irrigated and non-irrigated Quercus virginiana Mill. (live oak) trees was investigated. In Experiment 2, photosynthesis, transpiration, and leaf water potential were measured in two-year-old seedlings of Shumard oak (Quercus shumardii Buckl.), bur oak (Quercus macrocarpa Michx.), bald cypress (Taxodium distichum (L.) Rich.), and live oak.
520 $a Irrigated trees consistently had lower net carbon assimilation and transpiration rates and conductance values than non-irrigated trees. However, water use efficiency remained low in both irrigated and non-irrigated trees. Irrigated trees exhibited greater seasonal variation of transpiration, while non-irrigated trees were not dependent on water availability to maintain physiological function. Gas exchange of both irrigated and non-irrigated trees declined as water was limited, but irrigated trees consistently exhibited lower and steadier rates throughout the year than non-irrigated trees. Based on foliar stable isotope analysis and leaf water potentials, irrigated trees were more sensitive to water stress than non-irrigated trees. Consistently lower rates of gas exchange and stomatal responses in irrigated trees could indicate shallower rooting systems and/or dependency on water availability. Light compensation and light saturation points, were indicators of differences in photosynthetic capacity between the irrigated and non-irrigated trees. Among the T. distichum seedlings, mortality rates correlated with water use efficiency, suggesting that species with lower water use efficiency that do not regulate stomatal aperture to maintain physiological mechanisms are more susceptible to mortality when exposed to drought conditions.
590 $a School code: 1218.
650 4 $a Environmental management. $3 535182
690 $a 0474
710 2 $a Southern University and Agricultural and Mechanical College. $b Urban Forestry. $3 3283074
773 0 $t Dissertation Abstracts International $g 78-04B(E).
790 $a 1218
791 $a Ph.D.
792 $a 2016
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10168943