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

Investigations into the Hyporheic Zo...

Harrison, Anna Michelle.

FindBook

Google Book

Amazon

博客來

Investigations into the Hyporheic Zone: Assessing the Influence of Groundwater-Surface Water Interactions on Metal Exposure and Effects to Aquatic Ecosystems.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Investigations into the Hyporheic Zone: Assessing the Influence of Groundwater-Surface Water Interactions on Metal Exposure and Effects to Aquatic Ecosystems./
作者:	Harrison, Anna Michelle.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	192 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-02, Section: B.
Contained By:	Dissertations Abstracts International80-02B.
標題:	Natural Resource Management. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10903063
ISBN:	9780438126695

Investigations into the Hyporheic Zone: Assessing the Influence of Groundwater-Surface Water Interactions on Metal Exposure and Effects to Aquatic Ecosystems.
Harrison, Anna Michelle.

Investigations into the Hyporheic Zone: Assessing the Influence of Groundwater-Surface Water Interactions on Metal Exposure and Effects to Aquatic Ecosystems. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 192 p.

Source: Dissertations Abstracts International, Volume: 80-02, Section: B.

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

This item must not be added to any third party search indexes.

Metal contaminated sediments are a common stressor of biological communities in freshwater ecosystems. Sediments have the capacity to store metals (via various chemical binding ligands in sediments), rendering them unavailable for uptake by biological communities. Physical processes in streams, however, can influence the chemistry of sediments and ultimately control how sediments store metals. Groundwater-surface water interactions (hyporheic flows) are an example of a natural physical process that influences sediment chemistry and potentially the exposure of metals to aquatic biota. Hyporheic flows are generally characterized as either 'downwelling' (surface water entering streambed sediments) or 'upwelling' (from sediments into surface water). Flow direction can be related to the location in a stream riffle, as downwelling typically occurs at the head (upstream end) of a riffle and upwelling occurs on the tail (downstream end) of a riffle. Using multiple lines of evidence (field, mesocosm, and laboratory studies), this dissertation investigated the role of hyporheic flows on metal exposure and effects to aquatic organisms. Depending on the experiment, biological assessments included: test organism (Hyalella azteca) survival, benthic macroinvertebrate community composition, and biofilm structure and function. In the in situ experiments in Chapter 2, the heads of riffles were more oxidized and had greater benthic macroinvertebrate diversity and more sensitive species than the tails of riffles. Flow-through experiments in Chapter 2 also observed more oxidized sediments in downwelling conditions, compared to mesocosms without downwelling. In Chapter 3, oxygenated (oxic) hyporheic flows (downwelling) increased the bioavailability of metals, and subsequent declines in H. azteca survival were observed. In Chapter 4, the in situ experiments at field sites with upwelling hyporheic flows showed that sediments exposed to upwelling zones had less oxygen (were more reduced) and metals were less bioavailable than sediments not exposed to hyporheic upwelling. This research demonstrates the importance of hyporheic flows on redox-sensitive binding ligands and the subsequent effects on aquatic biological communities. It also suggests that inclusion of hyporheic flows in ecological risk assessments could more accurately characterize metal exposure pathways to aquatic biota.

ISBN: 9780438126695Subjects--Topical Terms:

676989
Natural Resource Management.
Subjects--Index Terms:

Aquatic ecosystems

Investigations into the Hyporheic Zone: Assessing the Influence of Groundwater-Surface Water Interactions on Metal Exposure and Effects to Aquatic Ecosystems.
LDR:03792nmm a2200397 4500 001 2272262
005 20201105110008.5
008 220629s2018 ||||||||||||||||| ||eng d
020 $a 9780438126695
035 $a (MiAaPQ)AAI10903063
035 $a (MiAaPQ)umichrackham:001196
035 $a AAI10903063
040 $a MiAaPQ $c MiAaPQ
100 1 $a Harrison, Anna Michelle. $3 3549695
245 1 0 $a Investigations into the Hyporheic Zone: Assessing the Influence of Groundwater-Surface Water Interactions on Metal Exposure and Effects to Aquatic Ecosystems.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 192 p.
500 $a Source: Dissertations Abstracts International, Volume: 80-02, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Burton, Allen.
502 $a Thesis (Ph.D.)--University of Michigan, 2018.
506 $a This item must not be added to any third party search indexes.
506 $a This item must not be sold to any third party vendors.
520 $a Metal contaminated sediments are a common stressor of biological communities in freshwater ecosystems. Sediments have the capacity to store metals (via various chemical binding ligands in sediments), rendering them unavailable for uptake by biological communities. Physical processes in streams, however, can influence the chemistry of sediments and ultimately control how sediments store metals. Groundwater-surface water interactions (hyporheic flows) are an example of a natural physical process that influences sediment chemistry and potentially the exposure of metals to aquatic biota. Hyporheic flows are generally characterized as either 'downwelling' (surface water entering streambed sediments) or 'upwelling' (from sediments into surface water). Flow direction can be related to the location in a stream riffle, as downwelling typically occurs at the head (upstream end) of a riffle and upwelling occurs on the tail (downstream end) of a riffle. Using multiple lines of evidence (field, mesocosm, and laboratory studies), this dissertation investigated the role of hyporheic flows on metal exposure and effects to aquatic organisms. Depending on the experiment, biological assessments included: test organism (Hyalella azteca) survival, benthic macroinvertebrate community composition, and biofilm structure and function. In the in situ experiments in Chapter 2, the heads of riffles were more oxidized and had greater benthic macroinvertebrate diversity and more sensitive species than the tails of riffles. Flow-through experiments in Chapter 2 also observed more oxidized sediments in downwelling conditions, compared to mesocosms without downwelling. In Chapter 3, oxygenated (oxic) hyporheic flows (downwelling) increased the bioavailability of metals, and subsequent declines in H. azteca survival were observed. In Chapter 4, the in situ experiments at field sites with upwelling hyporheic flows showed that sediments exposed to upwelling zones had less oxygen (were more reduced) and metals were less bioavailable than sediments not exposed to hyporheic upwelling. This research demonstrates the importance of hyporheic flows on redox-sensitive binding ligands and the subsequent effects on aquatic biological communities. It also suggests that inclusion of hyporheic flows in ecological risk assessments could more accurately characterize metal exposure pathways to aquatic biota.
590 $a School code: 0127.
650 4 $a Natural Resource Management. $3 676989
653 $a Aquatic ecosystems
653 $a Benthic macroinvertebrates
653 $a Biofilms
653 $a Hyporheic
653 $a Metals
653 $a Sediment
690 $a 0528
710 2 $a University of Michigan. $b Natural Resources and Environment. $3 2098298
773 0 $t Dissertations Abstracts International $g 80-02B.
790 $a 0127
791 $a Ph.D.
792 $a 2018
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10903063