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

FindBook

Google Book

Amazon

博客來

A Taxon-Specific Analysis of Chironomid δ13c to Assess Carbon Cycling of Blakemere Moss During the Early Holocene.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	A Taxon-Specific Analysis of Chironomid δ13c to Assess Carbon Cycling of Blakemere Moss During the Early Holocene./
作者:	Weston, Kyle.
面頁冊數:	1 online resource (111 pages)
附註:	Source: Masters Abstracts International, Volume: 84-03.
Contained By:	Masters Abstracts International84-03.
標題:	Isotopes. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29291022click for full text (PQDT)
ISBN:	9798845465016

A Taxon-Specific Analysis of Chironomid δ13c to Assess Carbon Cycling of Blakemere Moss During the Early Holocene.
Weston, Kyle.

A Taxon-Specific Analysis of Chironomid δ13c to Assess Carbon Cycling of Blakemere Moss During the Early Holocene. - 1 online resource (111 pages)

Source: Masters Abstracts International, Volume: 84-03.

Thesis (M.Sc.(Res.))--Lancaster University (United Kingdom), 2022.

Includes bibliographical references

Chironomid remains of the Chironomus genus and Chironomini tribe were extracted and studied for carbon isotopic content from a lake sediment sequence from Blakemere Moss during the early Holocene (10,743 to 10,482 Cal BP). Evidence derived from bulk geochemical proxies and chironomid assemblage was used to elucidate the factors that influenced the chironomid isotopic content. The spatial heterogeneity of carbon processing was revealed by vastly different carbon isotopic signatures (Δδ13CHC; Δδ13CChironomus - Chironomini = -0.7 to 7.0‰). A climatic amelioration beginning the sequence, indicated by a rapid increase in chironomid-inferred temperatures, was mirrored by a rapid fall in Chironomus δ13CHC and δ13COM with the former exhibiting the greater 13C depletion. This indicates that in our shallow paleolake, an increase in methane-derived carbon to Chironomus is likely linked to a strengthened summer thermal stratification. Due to the hydrologically closed nature of Blakemere Moss, a small shift in precipitation/evaporation balance is thought to have induced an ecosystem state shift from algal to macrophyte dominance and increased faunal diversity, indicated by an increase in C/N and δ15N reduction. Despite a concurrent shift in the dominating functional feeding group from collectors to shredders, Chironomini δ13CHC continued to represent the δ13C of aquatic organic matter, indicating that bulked samples of littoral dwelling Chironomini can be used to faithfully reconstruct the δ13C of aquatic organic matter through time. This supports the use of littoral-dwelling Chironomini for tracing temporal variations of aquatic organic matter, and for quantifying methane-derived carbon uptake via ingestion of methane-oxidising bacteria in isotope mixing models.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798845465016Subjects--Topical Terms:

664463
Isotopes.
Index Terms--Genre/Form:

542853
Electronic books.

A Taxon-Specific Analysis of Chironomid δ13c to Assess Carbon Cycling of Blakemere Moss During the Early Holocene.
LDR:03095nmm a2200361K 4500 001 2354897
005 20230505090454.5
006 m o d
007 cr mn ---uuuuu
008 241011s2022 xx obm 000 0 eng d
020 $a 9798845465016
035 $a (MiAaPQ)AAI29291022
035 $a (MiAaPQ)Lancaster_169404
035 $a AAI29291022
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Weston, Kyle. $3 3695270
245 1 2 $a A Taxon-Specific Analysis of Chironomid δ13c to Assess Carbon Cycling of Blakemere Moss During the Early Holocene.
264 0 $c 2022
300 $a 1 online resource (111 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 84-03.
500 $a Advisor: Wynn, Peter.
502 $a Thesis (M.Sc.(Res.))--Lancaster University (United Kingdom), 2022.
504 $a Includes bibliographical references
520 $a Chironomid remains of the Chironomus genus and Chironomini tribe were extracted and studied for carbon isotopic content from a lake sediment sequence from Blakemere Moss during the early Holocene (10,743 to 10,482 Cal BP). Evidence derived from bulk geochemical proxies and chironomid assemblage was used to elucidate the factors that influenced the chironomid isotopic content. The spatial heterogeneity of carbon processing was revealed by vastly different carbon isotopic signatures (Δδ13CHC; Δδ13CChironomus - Chironomini = -0.7 to 7.0‰). A climatic amelioration beginning the sequence, indicated by a rapid increase in chironomid-inferred temperatures, was mirrored by a rapid fall in Chironomus δ13CHC and δ13COM with the former exhibiting the greater 13C depletion. This indicates that in our shallow paleolake, an increase in methane-derived carbon to Chironomus is likely linked to a strengthened summer thermal stratification. Due to the hydrologically closed nature of Blakemere Moss, a small shift in precipitation/evaporation balance is thought to have induced an ecosystem state shift from algal to macrophyte dominance and increased faunal diversity, indicated by an increase in C/N and δ15N reduction. Despite a concurrent shift in the dominating functional feeding group from collectors to shredders, Chironomini δ13CHC continued to represent the δ13C of aquatic organic matter, indicating that bulked samples of littoral dwelling Chironomini can be used to faithfully reconstruct the δ13C of aquatic organic matter through time. This supports the use of littoral-dwelling Chironomini for tracing temporal variations of aquatic organic matter, and for quantifying methane-derived carbon uptake via ingestion of methane-oxidising bacteria in isotope mixing models.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Isotopes. $3 664463
650 4 $a Invertebrates. $3 600655
650 4 $a Food chains. $3 3680771
650 4 $a Flowers & plants. $3 3564028
650 4 $a Climate change. $2 bicssc $3 2079509
650 4 $a Aquatic plants. $3 596994
650 4 $a Animal sciences. $3 3174829
650 4 $a Aquatic sciences. $3 3174300
650 4 $a Botany. $3 516217
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0404
690 $a 0475
690 $a 0792
690 $a 0309
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a Lancaster University (United Kingdom). $3 1294170
773 0 $t Masters Abstracts International $g 84-03.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29291022 $z click for full text (PQDT)