Can fish introductions alter nutrient cycles in previously fishless high-latitude lakes?

Milardi, Marco; Lappalainen, Jyrki; McGowan, Suzanne; Weckström, Jan

doi:10.4081/jlimnol.2016.1364

Cited by 6 publications

(5 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presence and abundance of fish has been suspected as a potential driver of diatom species distribution via controlling the direct grazing pressure on planktic diatom communities (e.g., McGowan et al, 2018). Indeed, fish presence has shown strong cascading effects on zooplankton and macroinvertebrate communities in arctic and boreal regions (Jeppesen et al, 2003(Jeppesen et al, , 2017Milardi et al, 2016) and on the dominance of planktic or benthic diatom production (Milardi et al, 2017). In this study, however, we could not show a significant effect of fish presence on diatom species community distribution, similar to results from Jeppesen et al (2017), who did not find cascading effects of fish on the phytoplankton biomass in low and high arctic lakes in Greenland.…”

Section: Diatoms-environment Vs Spacementioning

confidence: 99%

Unlocking environmental archives in the Arctic—insights from modern diatom-environment relationships in lakes and ponds across Greenland

Weckström

Wischnewski

et al. 2023

Front. Ecol. Evol.

View full text Add to dashboard Cite

Given the current rate of Arctic warming, the associated ecological changes need to be put into a longer-term context of natural variability. Palaeolimnology offers tools to explore archives stored in the sediments of Arctic lakes and ponds. The interpretation of these archives requires a sound knowledge of the ecology and distribution of the sedimentary proxy organisms used. Here we explored the relationship between diatoms, a widely used proxy group of siliceous algae, and the environmental drivers defining their assemblages and diversity in 115 lakes and ponds in Greenland, a markedly understudied arctic region covering extensive climate and environmental gradients. The main environmental drivers of diatom communities were related to climate and lake ontogeny, including both measured and unmeasured (spatially structured) environmental variables. The lakes and ponds in the northern study regions showed a distinctive dominance of small benthic fragilarioid species, while diatom communities in the South(west) of Greenland were more varied, including many epiphytes, owing to the longer growing season and higher habitat diversity of these lakes and ponds. The newly established lakes in the Ilulissat region host markedly different communities compared to all other sites. Species diversity followed an overall clear latitudinal decline towards the North. Despite the large distances between our study regions, diatom dispersal appeared not to be limited. Based on our results, diatoms are an excellent proxy for climate-mediated lake ecosystem change in the Arctic and thus a valuable tool for climate reconstructions in the region. Particular consideration should be given to often unmeasured climate-related drivers, such as in-lake habitat availability, due to their apparent importance in defining Arctic diatom communities.

show abstract

Section: Diatoms-environment Vs Spacementioning

confidence: 99%

Unlocking environmental archives in the Arctic—insights from modern diatom-environment relationships in lakes and ponds across Greenland

Weckström

Wischnewski

et al. 2023

Front. Ecol. Evol.

View full text Add to dashboard Cite

show abstract

“…For example, plant macrofossils from introduced macrophytes are often preserved in lake sediments. The analysis of additional groups of fossil organisms (such as diatoms, zooplankton and chironomids) can provide detail of the response of the aquatic system (e.g., due to an altered food‐web structure or changes in the nature and amount of available habitat), as a result of such introductions . The recent development of sedimentary DNA analysis is also becoming a powerful tool in the assessing the timing of species introductions, and extinctions, in lakes and their catchments.…”

Section: People and Climate: The Palaeolimnological Indicatorsmentioning

confidence: 99%

“…The analysis of additional groups of fossil organisms (such as diatoms, zooplankton and chironomids) can provide detail of the response of the aquatic system (e.g., due to an altered food-web structure or changes in the nature and amount of available habitat 149,150 ), as a result of such introductions. 151,152 The recent development of sedimentary DNA analysis is also becoming a powerful tool in the assessing the timing of species introductions, and extinctions, in lakes and their catchments. For example, sedimentary DNA has been used to show that the yellow perch, an assumed invasive species in the lakes of Northern New York State (USA), has actually been present in the systems for over 2000 years.…”

Section: Species Introductions and Extirpationsmentioning

confidence: 99%

Deciphering long‐term records of natural variability and human impact as recorded in lake sediments: a palaeolimnological puzzle

et al. 2016

Self Cite

View full text Add to dashboard Cite

Global aquatic ecosystems are under increasing threat from anthropogenic activity, as well as being exposed to past (and projected) climate change, however, the nature of how climate and human impacts are recorded in lake sediments is often ambiguous. Natural and anthropogenic drivers can force a similar response in lake systems, yet the ability to attribute what change recorded in lake sediments is natural, from that which is anthropogenic, is increasingly important for understanding how lake systems have, and will continue to function when subjected to multiple stressors; an issue that is particularly acute when considering management options for aquatic ecosystems. The duration and timing of human impacts on lake systems varies geographically, with some regions of the world (such as Africa and South America) having a longer legacy of human impact than others (e.g., New Zealand). A wide array of techniques (biological, chemical, physical and statistical) is available to palaeolimnologists to allow the deciphering of complex sedimentary records. Lake sediments are an important archive of how drivers have changed through time, and how these impacts manifest in lake systems. With a paucity of ‘real‐time’ data pre‐dating human impact, palaeolimnological archives offer the only insight into both natural variability (i.e., that driven by climate and intrinsic lake processes) and the impact of people. While there is a need to acknowledge complexity, and temporal and spatial variability when deciphering change from sediment archives, a palaeolimnological approach is a powerful tool for better understanding and managing global aquatic resources. WIREs Water 2017, 4:e1195. doi: 10.1002/wat2.1195 This article is categorized under: Water and Life > Stresses and Pressures on Ecosystems Science of Water > Water and Environmental Change Water and Life > Methods

show abstract

“…These ecosystem shifts might not have been investigated in the past but could be reconstructed through modeling with modern techniques rooted in historical data (see e.g. Milardi et al, 2016, Milardi et al, 2019b, arguably widening and strengthening our understanding of overlooked ecosystem processes.…”

Section: Introductionmentioning

confidence: 99%

Could a freshwater fish be at the root of dystrophic crises in a coastal lagoon?

Milardi

Soana

Chapman

et al. 2020

Science of The Total Environment

View full text Add to dashboard Cite

Can fish introductions alter nutrient cycles in previously fishless high-latitude lakes?

Abstract: The

Cited by 6 publications

References 68 publications

Unlocking environmental archives in the Arctic—insights from modern diatom-environment relationships in lakes and ponds across Greenland

Unlocking environmental archives in the Arctic—insights from modern diatom-environment relationships in lakes and ponds across Greenland

Deciphering long‐term records of natural variability and human impact as recorded in lake sediments: a palaeolimnological puzzle

Could a freshwater fish be at the root of dystrophic crises in a coastal lagoon?

Contact Info

Product

Resources

About