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Using environmental...
Using environmental DNA to unravel aquatic ecosystem dynamics
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- Olajos, Fredrik, 1987- (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Englund, Göran, Professor, 1957- (preses)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Wang, Xiao-Ru, Professor (preses)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Umeå Plant Science Centre (UPSC)
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- Bindler, Richard, Professor, 1963- (preses)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Bokma, Folmer, Lektor (preses)
- Karlstads universitet, Sverige
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- Capo, Eric, Assistant professor (preses)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Kemiska institutionen
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- Öhlund, Gunnar, Forskare (preses)
- Vilt och Fisk, SLU Umeå
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- Clare, Elizabeth, Professor (opponent)
- York University, Toronto, Canada
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(creator_code:org_t)
- ISBN 9789180704120
- Umeå : Umeå University, 2024
- Engelska 24 s.
- Relaterad länk:
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https://umu.diva-por...
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https://umu.diva-por... (primary) (Raw object)
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Abstract
Ämnesord
Stäng
- Human-induced climate change has led to unprecedented declines in Earth's biodiversity and significant habitat loss. Aquatic ecosystems areespecially at risk, facing pollution, overexploitation, and destruction. Consequently, monitoring biodiversity is critical. Traditional monitoring methods are often low in detection rates, time-consuming, invasive, and harmful to species, which hampers comprehensive biodiversity assessments. Environmental DNA (eDNA) offers a rapid alternative fortaxonomic identification, extracting genetic material from soil, sediments, or water without capturing living organisms, proving useful where traditional methods fall short. However, its integration into aquatic ecology is hampered by unresolved methodological issues.This thesis demonstrates how eDNA can help reconstruct fish colonization histories in lakes post-glacial retreat. I employed species-specific primers with digital droplet PCR and metagenomic shotgun sequencing on ancient DNA from Holocene lake sediments. My findings show the detectability of DNA from ancient fish populations. However, each method exhibited technical limitations that led to varying degrees offalse negatives and false positive results. Additionally, I examined how Northern pike (Esox Lucius) affects ecological speciation in Europeanwhitefish (Coregonus lavaretus), promoting a shift from insectivorous to piscivorous states, enhancing predator biodiversity and biomass. Dietan alyses of piscivorous birds through digital droplet PCR revealed that smaller whitefish support a larger, more diverse bird community. Finally, I compared two molecular techniques for quantifying bird diets from fecal DNA, finding that metabarcoding with a universal fish primer and digital droplet PCR yielded similar results. This research enhances ourunderstanding of the potential and limitations of molecular tools forspecies identification and aids the integration of eDNA into aquatic ecology.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- Environmental DNA
- ancient DNA
- colonization
- apex predator
- pike
- whitefish
- piscivorous birds
- aquatic ecosystems
- metabarcoding
- digital droplet PCR
- biology
- biologi
Publikations- och innehållstyp
- vet (ämneskategori)
- dok (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
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Olajos, Fredrik, ...
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Englund, Göran, ...
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Wang, Xiao-Ru, P ...
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Bindler, Richard ...
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Bokma, Folmer, L ...
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Capo, Eric, Assi ...
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visa fler...
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Öhlund, Gunnar, ...
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Clare, Elizabeth ...
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- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Biologi
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och Ekologi
- Av lärosätet
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Umeå universitet