語系:
繁體中文
English
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
Tropical Plant Hydraulics in a Chang...
~
Fontes, Clarissa.
FindBook
Google Book
Amazon
博客來
Tropical Plant Hydraulics in a Changing Climate: Importance for Species Distribution and Vulnerability to Drought.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Tropical Plant Hydraulics in a Changing Climate: Importance for Species Distribution and Vulnerability to Drought./
作者:
Fontes, Clarissa.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:
69 p.
附註:
Source: Dissertations Abstracts International, Volume: 81-03, Section: B.
Contained By:
Dissertations Abstracts International81-03B.
標題:
Plant sciences. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13861543
ISBN:
9781085780407
Tropical Plant Hydraulics in a Changing Climate: Importance for Species Distribution and Vulnerability to Drought.
Fontes, Clarissa.
Tropical Plant Hydraulics in a Changing Climate: Importance for Species Distribution and Vulnerability to Drought.
- Ann Arbor : ProQuest Dissertations & Theses, 2019 - 69 p.
Source: Dissertations Abstracts International, Volume: 81-03, Section: B.
Thesis (Ph.D.)--University of California, Berkeley, 2019.
This item must not be sold to any third party vendors.
Amazonian droughts are becoming more frequent and intense, having a profound effect on water availability for plants. However, we still have limited abilities to predict the effect of climate change on plant species survival and distribution in mega-diverse systems like the Amazon. Plant hydraulic traits coupled with the assessment of environmental characteristics emerge as an important tool to assess species physiological performance and resilience, especially during extreme climatic events. Here we investigate plant hydraulic strategies and physiological performance of tropical tree species (i) across contrasting environments, (ii) during an extreme drought event and (iii) during the course of a day to understand how water availability may shape species distribution and plant vulnerability to drought in the Amazon Basin.In the first chapter, I investigate if the current patterns of species' distribution in the main Amazonian habitats can be explained by species hydraulic strategies and how variation in the hydraulic properties of Amazonian forests influences species-specific vulnerability to drought across different habitat types. I found strong segregation between species from wet vs. dry environments in relation to their functional traits, suggesting that water availability could be a strong predictor of species functional composition in the different Amazonian environments. Also, the xylem of dry-habitat species are more embolism resistant, but it may not be correct to assume that these species will be the ones performing better under a warmer and drier climate.The second chapter assesses plant physiological performance during a strong El Nino. This is the first study in the Amazon to measure in situ tree physiological stress before, during and after a natural drought event. I show that the warmer and drier conditions imposed by the El Nino greatly amplified trees' physiological stress and could affect growth, phenology and potentially lead to tree mortality. Given the extreme nature of the this El Nino and that temperatures are predicted to increase in the tropics, this work can serve as a case study of the possible impact climate warming can have on tropical trees.In the third chapter, I analyzed the diurnal patterns of stomatal conductance, water potential, and sap velocity during the dry season and investigate how they change with canopy temperature and vapor pressure deficit. I found that unlike preview reported, plants have a re-hydration period during the hottest time of the day probably due to an imbalance between stem sap-velocity and leaf transpiration rates. This study helps to elucidate the array of processes influencing diurnal patterns of plant-water balance in tropical trees.
ISBN: 9781085780407Subjects--Topical Terms:
3173832
Plant sciences.
Tropical Plant Hydraulics in a Changing Climate: Importance for Species Distribution and Vulnerability to Drought.
LDR
:03769nmm a2200301 4500
001
2263210
005
20200214113211.5
008
220629s2019 ||||||||||||||||| ||eng d
020
$a
9781085780407
035
$a
(MiAaPQ)AAI13861543
035
$a
AAI13861543
040
$a
MiAaPQ
$c
MiAaPQ
100
1
$a
Fontes, Clarissa.
$3
3540295
245
1 0
$a
Tropical Plant Hydraulics in a Changing Climate: Importance for Species Distribution and Vulnerability to Drought.
260
1
$a
Ann Arbor :
$b
ProQuest Dissertations & Theses,
$c
2019
300
$a
69 p.
500
$a
Source: Dissertations Abstracts International, Volume: 81-03, Section: B.
500
$a
Advisor: Dawson, Todd E.
502
$a
Thesis (Ph.D.)--University of California, Berkeley, 2019.
506
$a
This item must not be sold to any third party vendors.
520
$a
Amazonian droughts are becoming more frequent and intense, having a profound effect on water availability for plants. However, we still have limited abilities to predict the effect of climate change on plant species survival and distribution in mega-diverse systems like the Amazon. Plant hydraulic traits coupled with the assessment of environmental characteristics emerge as an important tool to assess species physiological performance and resilience, especially during extreme climatic events. Here we investigate plant hydraulic strategies and physiological performance of tropical tree species (i) across contrasting environments, (ii) during an extreme drought event and (iii) during the course of a day to understand how water availability may shape species distribution and plant vulnerability to drought in the Amazon Basin.In the first chapter, I investigate if the current patterns of species' distribution in the main Amazonian habitats can be explained by species hydraulic strategies and how variation in the hydraulic properties of Amazonian forests influences species-specific vulnerability to drought across different habitat types. I found strong segregation between species from wet vs. dry environments in relation to their functional traits, suggesting that water availability could be a strong predictor of species functional composition in the different Amazonian environments. Also, the xylem of dry-habitat species are more embolism resistant, but it may not be correct to assume that these species will be the ones performing better under a warmer and drier climate.The second chapter assesses plant physiological performance during a strong El Nino. This is the first study in the Amazon to measure in situ tree physiological stress before, during and after a natural drought event. I show that the warmer and drier conditions imposed by the El Nino greatly amplified trees' physiological stress and could affect growth, phenology and potentially lead to tree mortality. Given the extreme nature of the this El Nino and that temperatures are predicted to increase in the tropics, this work can serve as a case study of the possible impact climate warming can have on tropical trees.In the third chapter, I analyzed the diurnal patterns of stomatal conductance, water potential, and sap velocity during the dry season and investigate how they change with canopy temperature and vapor pressure deficit. I found that unlike preview reported, plants have a re-hydration period during the hottest time of the day probably due to an imbalance between stem sap-velocity and leaf transpiration rates. This study helps to elucidate the array of processes influencing diurnal patterns of plant-water balance in tropical trees.
590
$a
School code: 0028.
650
4
$a
Plant sciences.
$3
3173832
650
4
$a
Climate change.
$2
bicssc
$3
2079509
690
$a
0479
690
$a
0404
710
2
$a
University of California, Berkeley.
$b
Integrative Biology.
$3
2096278
773
0
$t
Dissertations Abstracts International
$g
81-03B.
790
$a
0028
791
$a
Ph.D.
792
$a
2019
793
$a
English
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13861543
筆 0 讀者評論
館藏地:
全部
電子資源
出版年:
卷號:
館藏
1 筆 • 頁數 1 •
1
條碼號
典藏地名稱
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
W9415444
電子資源
11.線上閱覽_V
電子書
EB
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
評論
新增評論
分享你的心得
Export
取書館
處理中
...
變更密碼
登入