Combining limnology and palaeolimnology to investigate recent regime shifts in a shallow, eutrophic lake
Randsalu Wendrup, Linda LU ; Conley, Daniel LU ; Carstensen, Jacob ; Hansson, Lars-Anders LU
; Brönmark, Christer
LU
; Fritz, Sherilyn C.
; Choudhary, Preetam
; Routh, Joyanto
and Hammarlund, Dan
LU
(2014)
In Journal of Paleolimnology
51(3).
p.437-448
- Abstract
- In this study, we demonstrate that an integrated approach, combining palaeolimnological records and limnological monitoring data, can increase our understanding of changing ecological patterns and processes in shallow lakes. We focused on recent regime shifts in shallow Lake Krankesjon, southern Sweden, including the collapse of the clear-water state in 1975 and its subsequent recovery in the late 1980s. We used diatom, hydrocarbon and biogenic silica sediment records, in concert with limnological data sets on nutrient concentrations, water clarity, chlorophyll-a and water depth, to investigate the shifts. The shift from clear to turbid conditions was abrupt and occurred over 1 to 2 years, whereas recovery of the clear-water state was more... (More)
- In this study, we demonstrate that an integrated approach, combining palaeolimnological records and limnological monitoring data, can increase our understanding of changing ecological patterns and processes in shallow lakes. We focused on recent regime shifts in shallow Lake Krankesjon, southern Sweden, including the collapse of the clear-water state in 1975 and its subsequent recovery in the late 1980s. We used diatom, hydrocarbon and biogenic silica sediment records, in concert with limnological data sets on nutrient concentrations, water clarity, chlorophyll-a and water depth, to investigate the shifts. The shift from clear to turbid conditions was abrupt and occurred over 1 to 2 years, whereas recovery of the clear-water state was more gradual, taking 4-5 years. In 1978, shortly after the first regime shift in water clarity, the diatom community underwent a significant shift. It became less diverse, with decreased abundance of epiphytic and planktonic taxa. Despite rising phosphorus concentrations and lower abundance of submerged macrophytes, Lake Krankesjon has remained in the clear-water state over the past 20 years, although this state seems to be increasingly unstable and susceptible to collapse. The complex reactions of the entire lake ecosystem to major changes in lake-water clarity, as shown by the palaeolimnological variables investigated in this study, emphasize the importance of careful lake and catchment management if a stable, clear-water state is desired. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4376310
- author
- Randsalu Wendrup, Linda
LU
; Conley, Daniel
LU
; Carstensen, Jacob
; Hansson, Lars-Anders
LU
; Brönmark, Christer
LU
; Fritz, Sherilyn C.
; Choudhary, Preetam
; Routh, Joyanto
and Hammarlund, Dan
LU
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Regime shift, Monitoring, Ecosystem, Alternative stable state, Diatoms, Hydrocarbons
- in
- Journal of Paleolimnology
- volume
- 51
- issue
- 3
- pages
- 437 - 448
- publisher
- Springer Science and Business Media B.V.
- external identifiers
-
- wos:000331105500008
- scopus:84893792880
- ISSN
- 0921-2728
- DOI
- 10.1007/s10933-014-9767-5
- language
- English
- LU publication?
- yes
- id
- d23ea7fa-00ca-4070-89d8-23cbde58d53f (old id 4376310)
- date added to LUP
- 2016-04-01 13:35:05
- date last changed
- 2025-01-03 12:01:24
@article{d23ea7fa-00ca-4070-89d8-23cbde58d53f,
abstract = {{In this study, we demonstrate that an integrated approach, combining palaeolimnological records and limnological monitoring data, can increase our understanding of changing ecological patterns and processes in shallow lakes. We focused on recent regime shifts in shallow Lake Krankesjon, southern Sweden, including the collapse of the clear-water state in 1975 and its subsequent recovery in the late 1980s. We used diatom, hydrocarbon and biogenic silica sediment records, in concert with limnological data sets on nutrient concentrations, water clarity, chlorophyll-a and water depth, to investigate the shifts. The shift from clear to turbid conditions was abrupt and occurred over 1 to 2 years, whereas recovery of the clear-water state was more gradual, taking 4-5 years. In 1978, shortly after the first regime shift in water clarity, the diatom community underwent a significant shift. It became less diverse, with decreased abundance of epiphytic and planktonic taxa. Despite rising phosphorus concentrations and lower abundance of submerged macrophytes, Lake Krankesjon has remained in the clear-water state over the past 20 years, although this state seems to be increasingly unstable and susceptible to collapse. The complex reactions of the entire lake ecosystem to major changes in lake-water clarity, as shown by the palaeolimnological variables investigated in this study, emphasize the importance of careful lake and catchment management if a stable, clear-water state is desired.}},
author = {{Randsalu Wendrup, Linda and Conley, Daniel and Carstensen, Jacob and Hansson, Lars-Anders and Brönmark, Christer and Fritz, Sherilyn C. and Choudhary, Preetam and Routh, Joyanto and Hammarlund, Dan}},
issn = {{0921-2728}},
keywords = {{Regime shift; Monitoring; Ecosystem; Alternative stable state; Diatoms; Hydrocarbons}},
language = {{eng}},
number = {{3}},
pages = {{437--448}},
publisher = {{Springer Science and Business Media B.V.}},
series = {{Journal of Paleolimnology}},
title = {{Combining limnology and palaeolimnology to investigate recent regime shifts in a shallow, eutrophic lake}},
url = {{http://dx.doi.org/10.1007/s10933-014-9767-5}},
doi = {{10.1007/s10933-014-9767-5}},
volume = {{51}},
year = {{2014}},
}